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Cecen B, Hassan S, Li X, Zhang YS. Smart Biomaterials in Biomedical Applications: Current Advances and Possible Future Directions. Macromol Biosci 2024; 24:e2200550. [PMID: 37728061 DOI: 10.1002/mabi.202200550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 09/02/2023] [Indexed: 09/21/2023]
Abstract
Smart biomaterials with the capacity to alter their properties in response to an outside stimulus or from within the environment around them have picked up significant attention in the biomedical community. This is primarily due to the interest in their biomedical applications that may be anticipated from them in a considerable number of dynamic structures and devices. Shape-memory materials are some of these materials that have been exclusively used for these applications. They exhibit unique structural reconfiguration features they adapt as per the provided environmental conditions and can be designed for their enhanced biocompatibility. Numerous research initiatives have focused on these smart biocompatible materials over the last few decades to enhance their biomedical applications. Shape-memory materials play a significant role in this regard to meet new surgical and medical devices' requirements for special features and utility cases. Because of the favorable design variety, different biomedical shape-memory materials can be developed by modifying their chemical and physical behaviors to accommodate the desired requirements. In this review, recent advances and characteristics of smart biomaterials for biomedical applications are described. The authors also discuss about their clinical translations in tissue engineering, drug delivery, and medical devices.
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Affiliation(s)
- Berivan Cecen
- Department of Mechanical Engineering, Rowan University, Glassboro, New Jersey, 08028, USA
- Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, 08028, USA
| | - Shabir Hassan
- Department of Biology, Khalifa University, Main Campus, Abu Dhabi, 127788, UAE
- Advanced Materials Chemistry Center (AMCC), Khalifa University, SAN Campus, Abu Dhabi, 127788, UAE
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Xin Li
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
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Zhao F, Rong W, Wang L, Sun L. Photothermal-Responsive Shape-Memory Magnetic Helical Microrobots with Programmable Addressable Shape Changes. ACS Appl Mater Interfaces 2023. [PMID: 37204337 DOI: 10.1021/acsami.3c02986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Faced with complex and diverse tasks, researchers seek to introduce stimuli-responsive materials into the field of microrobots. Magnetic helical microrobots based on shape-memory polymers demonstrate excellent locomotion capability and programmable shape transformations. However, the stimulation method of shape changes is still dependent on the rising of ambient temperature and lacks the ability to address individuals among multiple microrobots. In this paper, magnetic helical microrobots were prepared based on polylactic acid and Fe3O4 nanoparticles, which demonstrated controlled locomotion under rotating magnetic fields and programmable shape changes in their length, diameter, and chirality. The transition temperature of shape recoveries was adjusted to a range above 37 °C. At 46 °C, helical microrobots had a fast shape change with a recovery ratio of 72% in a minute. The photothermal effect of Fe3O4 nanoparticles under near-infrared laser can actuate the shape recovery rapidly, with a recovery ratio of 77% in 15 s and 90% in a minute. The stimulation strategy also allows addressing among multiple microrobots, or even within a single microrobot, selectively stimulating one or a part to change its shape. Combined with the magnetic field, laser-addressed shape changes were used for precise deployment and individual control of microrobots. Multiple microrobots can be enriched at the targeted point, heating the ambient temperature over 46 °C. The shape changes of internal parts of microrobots help them to grasp and assemble objects. Such microrobots have great potential in biomedicine and micromanipulation.
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Affiliation(s)
- Fu Zhao
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, China
| | - Weibin Rong
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, China
| | - Lefeng Wang
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, China
| | - Lining Sun
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, China
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3
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Farhan M, Hartstein DS, Pieper Y, Behl M, Lendlein A, Neffe AT. Bio-Inspired Magnetically Controlled Reversibly Actuating Multimaterial Fibers. Polymers (Basel) 2023; 15:polym15092233. [PMID: 37177379 PMCID: PMC10181395 DOI: 10.3390/polym15092233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 05/03/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023] Open
Abstract
Movements in plants, such as the coiling of tendrils in climbing plants, have been studied as inspiration for coiling actuators in robotics. A promising approach to mimic this behavior is the use of multimaterial systems that show different elastic moduli. Here, we report on the development of magnetically controllable/triggerable multimaterial fibers (MMFs) as artificial tendrils, which can reversibly coil and uncoil on stimulation from an alternating magnetic field. These MMFs are based on deformed shape-memory fibers with poly[ethylene-co-(vinyl acetate)] (PEVA) as their core and a silicone-based soft elastomeric magnetic nanocomposite shell. The core fiber provides a temperature-dependent expansion/contraction that propagates the coiling of the MMF, while the shell enables inductive heating to actuate the movements in these MMFs. Composites with mNP weight content ≥ 15 wt% were required to achieve heating suitable to initiate movement. The MMFs coil upon application of the magnetic field, in which a degree of coiling N = 0.8 ± 0.2 was achieved. Cooling upon switching OFF the magnetic field reversed some of the coiling, giving a reversible change in coiling ∆n = 2 ± 0.5. These MMFs allow magnetically controlled remote and reversible actuation in artificial (soft) plant-like tendrils, and are envisioned as fiber actuators in future robotics applications.
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Affiliation(s)
- Muhammad Farhan
- Institute of Active Polymers, Helmholtz-Zentrum Hereon, Kantstr. 55, 14513 Teltow, Germany
| | - Daniel S Hartstein
- Institute of Active Polymers, Helmholtz-Zentrum Hereon, Kantstr. 55, 14513 Teltow, Germany
| | - Yvonne Pieper
- Institute of Active Polymers, Helmholtz-Zentrum Hereon, Kantstr. 55, 14513 Teltow, Germany
| | - Marc Behl
- Institute of Active Polymers, Helmholtz-Zentrum Hereon, Kantstr. 55, 14513 Teltow, Germany
| | - Andreas Lendlein
- Institute of Active Polymers, Helmholtz-Zentrum Hereon, Kantstr. 55, 14513 Teltow, Germany
- Institute of Chemistry, University of Potsdam, 14476 Potsdam, Germany
| | - Axel T Neffe
- Institute of Active Polymers, Helmholtz-Zentrum Hereon, Kantstr. 55, 14513 Teltow, Germany
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Xu M, Xu Z, Soto MA, Xu YT, Hamad WY, MacLachlan MJ. Mechanically Responsive Circularly Polarized Luminescence from Cellulose-Nanocrystal-Based Shape-Memory Polymers. Adv Mater 2023:e2301060. [PMID: 37019850 DOI: 10.1002/adma.202301060] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/19/2023] [Indexed: 06/02/2023]
Abstract
Stimulus-responsive materials that display circularly polarized luminescence (CPL) have attracted great attention for application in chiral sensors and smart displays. However, due to difficulties in the regulation of chiral structures, fine control of CPL remains a challenge. Here, it is demonstrated that cellulose nanocrystal shape-memory polymers (CNC-SMPs) with luminescent components enable mechanically responsive CPL. The chiral nematic organization of CNCs in the material gives rise to a photonic bandgap. By manipulating the photonic bandgap or luminescence wavelengths of the luminescent CNC-SMPs, precise control of CPL emission with varied wavelengths and high dissymmetry factors (glum ) is achieved. Specifically, CPL emission can be switched reversibly by treating the luminescent CNC-SMPs with hot-pressing and recovery by heating. Pressure-responsive CPL with tunable glum values is ascribed to the pressure-responsive photonic bandgaps. Moreover, colorimetric and CPL-active patterns are created by imprinting desired forms into SMP samples. This study demonstrates a novel way to fabricate smart CPL systems using biomaterials.
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Affiliation(s)
- Mingcong Xu
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, No. 26 Hexing Road, Harbin, 150040, P. R. China
| | - Zhen Xu
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Miguel A Soto
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Yi-Tao Xu
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Wadood Y Hamad
- Transformation and Interfaces Group, Bioproducts Innovation Centre of Excellence, FP Innovations, 2665 East Mall, Vancouver, BC, V6T 1Z4, Canada
| | - Mark J MacLachlan
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
- Stewart Blusson Quantum Matter Institute, University of British Columbia, 2355 East Mall, Vancouver, BC, V6T 1Z4, Canada
- WPI Nano Life Science Institute, Kanazawa University, Kanazawa, 920-1192, Japan
- Bioproducts Institute, University of British Columbia, 2385 East Mall, Vancouver, British Columbia, V6T 1Z3, Canada
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Bai X, Gou X, Zhang J, Liang J, Yang L, Wang S, Hou X, Chen F. A Review of Smart Superwetting Surfaces Based on Shape-Memory Micro/Nanostructures. Small 2023; 19:e2206463. [PMID: 36609999 DOI: 10.1002/smll.202206463] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/04/2022] [Indexed: 06/17/2023]
Abstract
Bioinspired smart superwetting surfaces with special wettability have aroused great attention from fundamental research to technological applications including self-cleaning, oil-water separation, anti-icing/corrosion/fogging, drag reduction, cell engineering, liquid manipulation, and so on. However, most of the reported smart superwetting surfaces switch their wettability by reversibly changing surface chemistry rather than surface microstructure. Compared with surface chemistry, the regulation of surface microstructure is more difficult and can bring novel functions to the surfaces. As a kind of stimulus-responsive material, shape-memory polymer (SMP) has become an excellent candidate for preparing smart superwetting surfaces owing to its unique shape transformation property. This review systematically summarizes the recent progress of smart superwetting SMP surfaces including fabrication methods, smart superwetting phenomena, and related application fields. The smart superwettabilities, such as superhydrophobicity/superomniphobicity with tunable adhesion, reversible switching between superhydrophobicity and superhydrophilicity, switchable isotropic/anisotropic wetting, slippery surface with tunable wettability, and underwater superaerophobicity/superoleophobicity with tunable adhesion, can be obtained on SMP micro/nanostructures by regulating the surface morphology. Finally, the challenges and future prospects of smart superwetting SMP surfaces are discussed.
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Affiliation(s)
- Xue Bai
- Northwest Institute for Non-ferrous Metal Research, Xi'an, 710016, P. R. China
| | - Xiaodan Gou
- State Key Laboratory for Manufacturing System Engineering and Shaanxi Key Laboratory of Photonics Technology for Information, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Jialiang Zhang
- State Key Laboratory for Manufacturing System Engineering and Shaanxi Key Laboratory of Photonics Technology for Information, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Jie Liang
- State Key Laboratory for Manufacturing System Engineering and Shaanxi Key Laboratory of Photonics Technology for Information, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Lijing Yang
- Northwest Institute for Non-ferrous Metal Research, Xi'an, 710016, P. R. China
| | - Shaopeng Wang
- Northwest Institute for Non-ferrous Metal Research, Xi'an, 710016, P. R. China
| | - Xun Hou
- State Key Laboratory for Manufacturing System Engineering and Shaanxi Key Laboratory of Photonics Technology for Information, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Feng Chen
- State Key Laboratory for Manufacturing System Engineering and Shaanxi Key Laboratory of Photonics Technology for Information, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
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Razzaq MY, Gonzalez-Gutierrez J, Farhan M, Das R, Ruch D, Westermann S, Schmidt DF. 4D Printing of Electroactive Triple-Shape Composites. Polymers (Basel) 2023; 15. [PMID: 36850116 DOI: 10.3390/polym15040832] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/02/2023] [Accepted: 02/02/2023] [Indexed: 02/11/2023] Open
Abstract
Triple-shape polymers can memorize two independent shapes during a controlled recovery process. This work reports the 4D printing of electro-active triple-shape composites based on thermoplastic blends. Composite blends comprising polyester urethane (PEU), polylactic acid (PLA), and multiwall carbon nanotubes (MWCNTs) as conductive fillers were prepared by conventional melt processing methods. Morphological analysis of the composites revealed a phase separated morphology with aggregates of MWCNTs uniformly dispersed in the blend. Thermal analysis showed two different transition temperatures based on the melting point of the crystallizable switching domain of the PEU (Tm~50 ± 1 °C) and the glass transition temperature of amorphous PLA (Tg~61 ± 1 °C). The composites were suitable for 3D printing by fused filament fabrication (FFF). 3D models based on single or multiple materials were printed to demonstrate and quantify the triple-shape effect. The resulting parts were subjected to resistive heating by passing electric current at different voltages. The printed demonstrators were programmed by a thermo-mechanical programming procedure and the triple-shape effect was realized by increasing the voltage in a stepwise fashion. The 3D printing of such electroactive composites paves the way for more complex shapes with defined geometries and novel methods for triggering shape memory, with potential applications in space, robotics, and actuation technologies.
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Wang X, Zhang Z, Qin C, Guo X, Zhang Y. Shape-memory responses compared between random and aligned electrospun fibrous mats. Front Bioeng Biotechnol 2023; 11:1130315. [PMID: 36777255 PMCID: PMC9909598 DOI: 10.3389/fbioe.2023.1130315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 01/12/2023] [Indexed: 01/27/2023] Open
Abstract
Significant progress has been made in the design of smart fibers toward achieving improved efficacy in tissue regeneration. While electrospun fibers can be engineered with shape memory capability, both the fiber structure and applied shape-programming parameters are the determinants of final performance in applications. Herein, we report a comparison study on the shape memory responses compared between electrospun random and aligned fibers by varying the programming temperature T prog and the deforming strain ε deform . A PLLA-PHBV (6:4 mass ratio) polymer blend was first electrospun into random and aligned fibrous mat forms; thereafter, the effects of applying specific T prog (37°C and 46°C) and ε deform (30%, 50%, and 100%) on the morphological change, shape recovery efficiency, and switching temperature T sw of the two types of fibrous structures were examined under stress-free condition, while the maximum recovery stress σ max was determined under constrained recovery condition. It was identified that the applied T prog had less impact on fiber morphology, but increasing ε deform gave rise to attenuation in fiber diameters and bettering in fiber orientation, especially for random fibers. The efficiency of shape recovery was found to correlate with both the applied T prog and ε deform , with the aligned fibers exhibiting relatively higher recovery ability than the random counterpart. Moreover, T sw was found to be close to T prog , thereby revealing a temperature memory effect in the PLLA-PHBV fibers, with the aligned fibers showing more proximity, while the σ max generated was ε deform -dependent and 2.1-3.4 folds stronger for the aligned one in comparison with the random counterpart. Overall, the aligned fibers generally demonstrated better shape memory properties, which can be attributed to the macroscopic structural orderliness and increased molecular orientation and crystallinity imparted during the shape-programming process. Finally, the feasibility of using the shape memory effect to enable a mechanoactive fibrous substrate for regulating osteogenic differentiation of stem cells was demonstrated with the use of aligned fibers.
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Affiliation(s)
- Xianliu Wang
- College of Biological Science and Medical Engineering, Donghua University, Shanghai, China
| | - Zhaowenbin Zhang
- College of Biological Science and Medical Engineering, Donghua University, Shanghai, China
| | - Chunping Qin
- College of Biological Science and Medical Engineering, Donghua University, Shanghai, China
| | - Xuran Guo
- College of Biological Science and Medical Engineering, Donghua University, Shanghai, China
| | - Yanzhong Zhang
- College of Biological Science and Medical Engineering, Donghua University, Shanghai, China,Shanghai Engineering Research Centre of Nano-Biomaterials and Regenerative Medicine, Donghua University, Shanghai, China,China Orthopaedic Regenerative Medicine Group (CORMed), Hangzhou, China,*Correspondence: Yanzhong Zhang,
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Graul LM, Horn SJ, Nash LD, Cheung TB, Clubb FJ, Maitland DJ. Image-Based Evaluation of In Vivo Degradation for Shape-Memory Polymer Polyurethane Foam. Polymers (Basel) 2022; 14:4122. [PMID: 36236069 PMCID: PMC9571375 DOI: 10.3390/polym14194122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/09/2022] [Accepted: 09/12/2022] [Indexed: 11/06/2022] Open
Abstract
Shape-memory polymer (SMP) polyurethane foams have been applied as embolic devices and implanted in multiple animal models. These materials are oxidatively degradable and it is critical to quantify and characterize the degradation for biocompatibility assessments. An image-based method using high-resolution and magnification scans of histology sections was used to estimate the mass loss of the peripheral and neurovascular embolization devices (PED, NED). Detailed analysis of foam microarchitecture (i.e., struts and membranes) was used to estimate total relative mass loss over time. PED foams implanted in porcine arteries showed a degradation rate of ~0.11% per day as evaluated at 30-, 60-, and 90-day explant timepoints. NED foams implanted in rabbit carotid elastase aneurysms showed a markedly faster rate of degradation at ~1.01% per day, with a clear difference in overall degradation between 30- and 90-day explants. Overall, membranes degraded faster than the struts. NEDs use more hydrophobic foam with a smaller pore size (~150-400 μm) compared to PED foams (~800-1200 μm). Previous in vitro studies indicated differences in the degradation of the two polymer systems, but not to the magnitude seen in vivo. Implant location, animal species, and local tissue health are among the hypothesized reasons for different degradation rates.
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Affiliation(s)
- Lance M. Graul
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Staci J. Horn
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
- Department of Veterinary Pathobiology, Texas A&M University, College Station, TX 77843, USA
| | | | - Thomas B. Cheung
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Fred J. Clubb
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
- Department of Veterinary Pathobiology, Texas A&M University, College Station, TX 77843, USA
| | - Duncan J. Maitland
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
- Shape Memory Medical Inc., Santa Clara, CA 95054, USA
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Choi S, Kim B, Park S, Seo JH, Ahn SK. Slidable Cross-Linking Effect on Liquid Crystal Elastomers: Enhancement of Toughness, Shape-Memory, and Self-Healing Properties. ACS Appl Mater Interfaces 2022; 14:32486-32496. [PMID: 35792581 DOI: 10.1021/acsami.2c06462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The network structures of liquid crystal elastomers (LCEs) are crucial to impart rubbery behavior to LCEs and enable reversible actuation. Most LCEs developed to date are covalently linked, implying that the cross-links are fixed at a particular position. Herein, we report a new class of LCEs integrating polyrotaxanes (PRs) as slidable cross-links (PR-LCEs). Interestingly, the incorporation of a low loading (0.3-2.0 wt %) of the PR cross-linkers to the LCE causes a significant impact on various properties of the resulting PR-LCEs due to the pulley effect. The optimum PR loading is determined to be 0.5 wt %, at which point the toughness and damping behavior are maximized. The robust mechanical properties of the PR-LCE offers a superior actuation performance to that of the pristine LCE along with an excellent quadruple shape-memory effect. Furthermore, the incorporation of PR is useful to enhance the efficiency of shape-memory-assisted self-healing when heating above the nematic-isotropic transition.
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Affiliation(s)
- Subi Choi
- Department of Polymer Science and Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Bitgaram Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Sungmin Park
- Advanced Materials Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Ji-Hun Seo
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Suk-Kyun Ahn
- Department of Polymer Science and Engineering, Pusan National University, Busan 46241, Republic of Korea
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10
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Prasanna Kar G, Lin X, Terentjev EM. Fused Filament Fabrication of a Dynamically Crosslinked Network Derived from Commodity Thermoplastics. ACS Appl Polym Mater 2022; 4:4364-4372. [PMID: 35720670 PMCID: PMC9194902 DOI: 10.1021/acsapm.2c00340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 04/28/2022] [Indexed: 06/15/2023]
Abstract
A massive carbon footprint is associated with the ubiquitous use of plastics and their afterlife. Greenhouse gas (GHG) emissions from plastics are rising and increasingly consuming the global "carbon budget". It is, hence, paramount to implement an effective strategy to reclaim postconsumer plastic as feedstock for technologically innovative materials. Credible opportunity is offered by advances in materials chemistry and catalysis. Here, we demonstrate that by dynamically crosslinking thermoplastic polyolefins, commodity plastics can be upcycled into technically superior and economically competitive materials. A broadly applicable crosslinking strategy has been applied to polymers containing solely carbon-carbon and carbon-hydrogen bonds, initially by maleic anhydride functionalization, followed by epoxy-anhydride curing. These dynamic networks show a distinct rubber modulus above the melting transition. We demonstrate that sustainability and performance do not have to be mutually exclusive. The dynamic network can be extruded into a continuous filament to be in three-dimensional (3D) printing of complex objects, which retain the mechanical integrity of vitrimers. Being covalently crosslinked, these networks show a thermally triggered shape-memory response, with 90% recovery of a programmed shape. This study opens up the possibility of reclaiming recycled thermoplastics by imparting performance, sustainability, and technological advances to the reprocessed plastic.
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Abstract
![]()
Recent decades have
seen substantial interest in the development
and application of biocompatible shape memory polymers (SMPs), a class
of “smart materials” that can respond to external stimuli.
Although many studies have used SMP platforms triggered by thermal
or photothermal events to study cell mechanobiology, SMPs triggered
by cell activity have not yet been demonstrated. In a previous work,
we developed an SMP that can respond directly to enzymatic activity.
Here, our goal was to build on that work by demonstrating enzymatic
triggering of an SMP in response to the presence of enzyme-secreting
human cells. To achieve this phenomenon, poly(ε-caprolactone)
(PCL) and Pellethane were dual electrospun to form a fiber mat, where
PCL acted as a shape-fixing component that is labile to lipase, an
enzyme secreted by multiple cell types including HepG2 (human hepatic
cancer) cells, and Pellethane acted as a shape memory component that
is enzymatically stable. Cell-responsive shape memory performance
and cytocompatibility were quantitatively and qualitatively analyzed
by thermal analysis (thermal gravimetric analysis and differential
scanning calorimetry), surface morphology analysis (scanning electron
microscopy), and by incubation with HepG2 cells in the presence or
absence of heparin (an anticoagulant drug present in the human liver
that increases the secretion of hepatic lipase). The results characterize
the shape-memory functionality of the material and demonstrate successful
cell-responsive shape recovery with greater than 90% cell viability.
Collectively, the results provide the first demonstration of a cytocompatible
SMP responding to a trigger that is cellular in origin.
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Affiliation(s)
- Junjiang Chen
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, New York 13244, United States.,Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Lauren E Hamilton
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, New York 13244, United States.,Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Patrick T Mather
- Department of Chemical Engineering, Penn State University, University Park, Pennsylvania 16802, United States
| | - James H Henderson
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, New York 13244, United States.,Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
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Chen G, Chen D. Heterogeneous Solid-State Plasticity of a Multi-Functional Metallo-Supramolecular Shape-Memory Polymer towards Arbitrary Shape Programming. Polymers (Basel) 2022; 14:1598. [PMID: 35458348 DOI: 10.3390/polym14081598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/06/2022] [Accepted: 04/11/2022] [Indexed: 12/10/2022] Open
Abstract
Shape-memory polymers (SMPs) exhibit notable shape-shifting behaviors under environmental stimulations. In a specific shape-memory cycle, the material can be temporarily fixed at diverse geometries while recovering to the same permanent shape driven by the elastic network, which somewhat limits the versatility of SMPs. Via dynamic metallo-supramolecular interactions, herein, we report a multi-functional shape-memory polymer with tunable permanent shapes. The network is constructed by the metallic coordination of a four-armed polycaprolactone with a melting temperature of 54 °C. Owing to the thermo-induced stress relaxation through the bond exchange, the SMPs can be repeatedly programmed into different geometries in their solid state and show the self-welding feature. Via further welding of films crosslinked by different ions, it will present heterogeneous solid-state plasticity, and a more sophisticated shape can be created after the uniform thermal treatment. With elasticity and plasticity in the same network, the SMPs will display programmable shape-shifting behaviors. Additionally, the used material can be recast into a new film which retains the thermo-induced plasticity. Overall, we establish a novel strategy to manipulate the permanent shapes of SMPs through solid-state plasticity and develop a multi-functional shape-shifting material that has many practical applications.
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Fulati A, Uto K, Iwanaga M, Watanabe M, Ebara M. Smart Shape-Memory Polymeric String for the Contraction of Blood Vessels in Fetal Surgery of Sacrococcygeal Teratoma. Adv Healthc Mater 2022; 11:e2200050. [PMID: 35385611 DOI: 10.1002/adhm.202200050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 03/01/2022] [Indexed: 12/19/2022]
Abstract
Shape-memory polymers (SMPs) are promising materials in numerous emerging biomedical applications owing to their unique shape-memory characteristics. However, simultaneous realization of high strength, toughness, stretchability while maintaining high shape fixity (Rf ) and shape recovery ratio (Rr ) remains a challenge that hinders their practical applications. Herein, a novel shape-memory polymeric string (SMP string) that is ultra-stretchable (up to 1570%), strong (up to 345 MPa), tough (up to 237.9 MJ m-3 ), and highly recoverable (Rf averagely above 99.5%, Rr averagely above 99.1%) through a facile approach fabricated solely by tetra-branched poly(ε-caprolactone) (PCL) is reported. Notably, the shape-memory contraction force (up to 7.97 N) of this SMP string is customizable with the manipulation of their energy storage capacity by adjusting the string thickness and stretchability. In addition, this SMP string displays a controllable shape-memory response time and demonstrates excellent shape-memory-induced contraction effect against both rigid silicone tubes and porcine carotids. This novel SMP string is envisioned to be applied in the contraction of blood vessels and resolves the difficulties in the restriction of blood flow in minimally invasive surgeries such as fetoscopic surgery of sacrococcygeal teratoma (SCT).
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Affiliation(s)
- Ailifeire Fulati
- Research Center for Functional Materials National Institute for Materials Science Tsukuba 3050044 Japan
- Graduate School of Science and Technology University of Tsukuba Tsukuba 3058577 Japan
| | - Koichiro Uto
- Research Center for Functional Materials National Institute for Materials Science Tsukuba 3050044 Japan
| | - Masanobu Iwanaga
- Research Center for Functional Materials National Institute for Materials Science Tsukuba 3050044 Japan
| | - Miho Watanabe
- Department of Pediatric Surgery Graduate School of Medicine Osaka University Osaka 5650871 Japan
| | - Mitsuhiro Ebara
- Research Center for Functional Materials National Institute for Materials Science Tsukuba 3050044 Japan
- Graduate School of Science and Technology University of Tsukuba Tsukuba 3058577 Japan
- Graduate School of Advanced Engineering Tokyo University of Science Tokyo 1258585 Japan
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14
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Abstract
Microfluidic devices are gaining extensive interest due to their potential applications in wide-ranging areas, including lab-on-a-chip devices, fluid delivery, and artificial vascular networks. Most current microfluidic devices are in a planar design with fixed configurations once formed, which limits their applications such as in engineered vascular networks in biology and programmable drug delivery systems. Here, shape-programmable three-dimensional (3D) microfluidic structures, which are assembled from a bilayer of channel-embedded polydimethylsiloxane (PDMS) and shape-memory polymers (SMPs) via compressive buckling, are reported. 3D microfluidics in diverse geometries including those in open-mesh configurations are presented. In addition, they can be programmed into temporary shapes and recover their original shape under thermal stimuli due to the shape memory effect of the SMP component, with fluid flow in the microfluidic channels well maintained in both deformed and recovered shapes. Furthermore, the shape-fixing effect of SMPs enables freestanding open-mesh 3D microfluidic structures without the need for a substrate to maintain the 3D shape as used in previous studies. By adding magnetic particles into the PDMS layer, magnetically responsive 3D microfluidic structures are enabled to achieve fast, remote programming of the structures via a portable magnet. A 3D design phase diagram is constructed to show the effects of the magnetic PDMS/SMP thickness ratio and the volume fraction of magnetic particles on the shape programmability of the 3D microfluidic structures. The developed shape-programmable, open-mesh 3D microfluidic structures offer many opportunities for applications including tissue engineering, drug delivery, and many others.
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Affiliation(s)
- Zizheng Wang
- Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Hao Jiang
- Department of Mechanical and Aerospace Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Guangfu Wu
- Department of Biomedical Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Yi Li
- Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Teng Zhang
- Department of Mechanical and Aerospace Engineering, Syracuse University, Syracuse, New York 13244, United States
- BioInspired Syracuse, Syracuse University, Syracuse, New York 13244, United States
| | - Yi Zhang
- Department of Biomedical Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Xueju Wang
- Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
- Polymer Program, University of Connecticut, Storrs, Connecticut 06269, United States
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15
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Sun XC, Zhang ZP, Sun ZJ, Zheng JX, Liu XQ, Xia H. Smart Diffraction Gratings based on the Shape Memory Effect. Macromol Rapid Commun 2022; 43:e2100863. [PMID: 35179256 DOI: 10.1002/marc.202100863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/28/2022] [Indexed: 11/10/2022]
Abstract
The shape memory effect is the capability of a structure or a material that can be deformed into a certain temporary shape under the external stimulus, and the shape will be fixed without the stimulus. The recovery process can be triggered by the same stimulus. The intelligent tunable device based on the shape memory effect has a wide range of applications in many fields. In the optical field, smart diffraction gratings can accomplish in-situ optical diffraction according to requirements, meeting the high demand in the next generation of smart optical systems. However, it is essential to construct high-precision grating structures based on shape memory materials. Here, a smart diffraction grating based on UV-curable shape memory polymer via two-beam interference is reported, with nano-scale precision, excellent deformability and recovery ability and adjustable spectroscopic performance. More importantly, based on the shape memory effect, grating structures that surpass the precision of the fabrication system can be obtained. The smart grating exhibits rapid deformation and recovery upon heating and long-term storage capability, which facilitates them to be applied in optics, electronics and integrated sensing. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Xiang-Chao Sun
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
| | - Zhi-Peng Zhang
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
| | - Zhi-Juan Sun
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
| | - Jia-Xin Zheng
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
| | - Xue-Qing Liu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
| | - Hong Xia
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
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16
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Niazy D, Elsabbagh A, Ismail MR. Mono-Material 4D Printing of Digital Shape-Memory Components. Polymers (Basel) 2021; 13:3767. [PMID: 34771322 DOI: 10.3390/polym13213767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/27/2021] [Accepted: 10/28/2021] [Indexed: 11/17/2022] Open
Abstract
Dynamic shading systems in buildings help reduce solar gain. Actuated systems, which depend on renewable energy with reduced mechanical parts, further reduce building energy consumption compared to traditional interactive systems. This paper investigates stimuli-responsive polymer application in architectural products for sustainable energy consumption, complying with sustainable development goals (SDGs). The proposed research method posits that, by varying the infill percentage in a pre-determined manner inside a 3D-printed mono-material component, directionally controlled shape change can be detected due to thermal stimuli application. Thus, motion behavior can be engineered into a material. In this study, PLA+, PETG, TPU and PA 6 printed components are investigated under a thermal cycle test to identify a thermally responsive shape-memory polymer candidate that actuates within the built environment temperature range. A differential scanning calorimetry (DSC) test is carried out on TPU 95A and PA 6 to interpret the material shape response in terms of transitional temperatures. All materials tested show an anisotropic shape-change reaction in a pre-programmed manner, complying with the behavior engineered into the matter. Four-dimensional (4D)-printed PA6 shows shape-shifting behavior and total recovery to initial position within the built environment temperature range.
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17
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Peng W, Zhang G, Zhao Q, Xie T. Autonomous Off-Equilibrium Morphing Pathways of a Supramolecular Shape-Memory Polymer. Adv Mater 2021; 33:e2102473. [PMID: 34278623 DOI: 10.1002/adma.202102473] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/12/2021] [Indexed: 06/13/2023]
Abstract
The diverse morphing behaviors of living creatures arise from their unlimited pathways. In contrast, the equilibrium-driven morphing pathways of common synthetic shape-shifting materials are very limited. For a shape-memory polymer (SMP), its recovery from the temporary shape(s) to the permanent shape typically requires external stimulation and follows a single fixed route. Herein, a covalently crosslinked SMP is designed with ample ureidopyrimidinone (UPy) supramolecular moieties in the network. The UPy units endow the SMP with strong time-temperature dependency, which is explored as a mechanism for spatio-temporal programming of autonomous shape-shifting pathways. In particular, the use of digitally controlled photothermal heating provides versatility in control via an off-equilibrium mechanism. In addition, cooling/heating across its glass transition introduces a locking/unlocking mechanism for its temporal morphing. The benefits of these unique features are demonstrated by multi-shape-transformation, an "invisible"-color-based clock, a time-temperature indicator, and sequence-programmable 4D printing.
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Affiliation(s)
- Wenjun Peng
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Guogao Zhang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Qian Zhao
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 311215, China
| | - Tao Xie
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 311215, China
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18
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Zhang B, Li H, Cheng J, Ye H, Sakhaei AH, Yuan C, Rao P, Zhang YF, Chen Z, Wang R, He X, Liu J, Xiao R, Qu S, Ge Q. Mechanically Robust and UV-Curable Shape-Memory Polymers for Digital Light Processing Based 4D Printing. Adv Mater 2021; 33:e2101298. [PMID: 33998721 DOI: 10.1002/adma.202101298] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/25/2021] [Indexed: 06/12/2023]
Abstract
4D printing is an emerging fabrication technology that enables 3D printed structures to change configuration over "time" in response to an environmental stimulus. Compared with other soft active materials used for 4D printing, shape-memory polymers (SMPs) have higher stiffness, and are compatible with various 3D printing technologies. Among them, ultraviolet (UV)-curable SMPs are compatible with Digital Light Processing (DLP)-based 3D printing to fabricate SMP-based structures with complex geometry and high-resolution. However, UV-curable SMPs have limitations in terms of mechanical performance, which significantly constrains their application ranges. Here, a mechanically robust and UV-curable SMP system is reported, which is highly deformable, fatigue resistant, and compatible with DLP-based 3D printing, to fabricate high-resolution (up to 2 µm), highly complex 3D structures that exhibit large shape change (up to 1240%) upon heating. More importantly, the developed SMP system exhibits excellent fatigue resistance and can be repeatedly loaded more than 10 000 times. The development of the mechanically robust and UV-curable SMPs significantly improves the mechanical performance of the SMP-based 4D printing structures, which allows them to be applied to engineering applications such as aerospace, smart furniture, and soft robots.
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Affiliation(s)
- Biao Zhang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, China
- Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Honggeng Li
- Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Jianxiang Cheng
- Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Haitao Ye
- Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Amir Hosein Sakhaei
- School of Engineering and Digital Arts, University of Kent, Canterbury, Kent, CT2 7NT, UK
| | - Chao Yuan
- State Key Laboratory for Strength and Vibration of Mechanical Structures, Department of Engineering Mechanics, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Ping Rao
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yuan-Fang Zhang
- Digital Manufacturing and Design Centre, Singapore University of Technology and Design, Singapore, 487372, Singapore
| | - Zhe Chen
- State Key Laboratory of Fluid Power and Mechatronic System, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Rong Wang
- Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xiangnan He
- Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Ji Liu
- Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Rui Xiao
- State Key Laboratory of Fluid Power and Mechatronic System, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Shaoxing Qu
- State Key Laboratory of Fluid Power and Mechatronic System, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Qi Ge
- Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities, Southern University of Science and Technology, Shenzhen, 518055, China
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19
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Meurer J, Hniopek J, Bätz T, Zechel S, Enke M, Vitz J, Schmitt M, Popp J, Hager MD, Schubert US. Shape-Memory Metallopolymers Based on Two Orthogonal Metal-Ligand Interactions. Adv Mater 2021; 33:e2006655. [PMID: 33448105 DOI: 10.1002/adma.202006655] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 10/29/2020] [Indexed: 06/12/2023]
Abstract
A new shape-memory polymer is presented, in which both the stable phase as well as the switching unit consist of two different metal complexes. Suitable metal ions, which simultaneously form labile complexes with histidine and stable ones with terpyridine ligands, are identified via isothermal titration calorimetry (ITC) measurements. Different copolymers are synthesized, which contain butyl methacrylate as the main monomer and the metal-binding ligands in the side chains. Zn(TFMS)2 and NiCl2 are utilized for the dual crosslinking, resulting in the formation of metallopolymer networks. The switching temperature can simply be tuned by changing the composition as well as by the choice of the metal ion. Strain fixity rates (about 99%) and very high strain recovery rates (up to 95%) are achieved and the mechanism is revealed using different techniques such as Raman spectroscopy.
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Affiliation(s)
- Josefine Meurer
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, Jena, 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena, 07743, Germany
| | - Julian Hniopek
- Institute of Physical Chemistry (IPC), Friedrich Schiller University Jena, Helmholzweg 4, Jena, 07743, Germany
- Abbe Center of Photonics (ACP), Friedrich Schiller University Jena, Albert-Einstein-Straße 6, Jena, 07745, Germany
- Leibniz Institute of Photonic Technology, e. V. Jena, Albert-Einstein-Straße 9, Jena, 07745, Germany
| | - Thomas Bätz
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, Jena, 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena, 07743, Germany
| | - Stefan Zechel
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, Jena, 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena, 07743, Germany
| | - Marcel Enke
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, Jena, 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena, 07743, Germany
| | - Jürgen Vitz
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, Jena, 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena, 07743, Germany
| | - Michael Schmitt
- Institute of Physical Chemistry (IPC), Friedrich Schiller University Jena, Helmholzweg 4, Jena, 07743, Germany
- Abbe Center of Photonics (ACP), Friedrich Schiller University Jena, Albert-Einstein-Straße 6, Jena, 07745, Germany
| | - Jürgen Popp
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena, 07743, Germany
- Institute of Physical Chemistry (IPC), Friedrich Schiller University Jena, Helmholzweg 4, Jena, 07743, Germany
- Abbe Center of Photonics (ACP), Friedrich Schiller University Jena, Albert-Einstein-Straße 6, Jena, 07745, Germany
- Leibniz Institute of Photonic Technology, e. V. Jena, Albert-Einstein-Straße 9, Jena, 07745, Germany
| | - Martin D Hager
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, Jena, 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena, 07743, Germany
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, Jena, 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena, 07743, Germany
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20
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Yang C, Luo J, Polunas M, Bosnjak N, Chueng STD, Chadwick M, Sabaawy HE, Chester SA, Lee KB, Lee H. 4D-Printed Transformable Tube Array for High-Throughput 3D Cell Culture and Histology. Adv Mater 2020; 32:e2004285. [PMID: 32864842 PMCID: PMC7603422 DOI: 10.1002/adma.202004285] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/31/2020] [Indexed: 06/02/2023]
Abstract
3D cell cultures are rapidly emerging as a promising tool to model various human physiologies and pathologies by closely recapitulating key characteristics and functions of in vivo microenvironment. While high-throughput 3D culture is readily available using multi-well plates, assessing the internal microstructure of 3D cell cultures still remains extremely slow because of the manual, laborious, and time-consuming histological procedures. Here, a 4D-printed transformable tube array (TTA) using a shape-memory polymer that enables massively parallel histological analysis of 3D cultures is presented. The interconnected TTA can be programmed to be expanded by 3.6 times of its printed dimension to match the size of a multi-well plate, with the ability to restore its original dimension for transferring all cultures to a histology cassette in order. Being compatible with microtome sectioning, the TTA allows for parallel histology processing for the entire samples cultured in a multi-well plate. The test result with human neural progenitor cell spheroids suggests a remarkable reduction in histology processing time by an order of magnitude. High-throughput analysis of 3D cultures enabled by this TTA has great potential to further accelerate innovations in various 3D culture applications such as high-throughput/content screening, drug discovery, disease modeling, and personalized medicine.
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Affiliation(s)
- Chen Yang
- Department of Mechanical and Aerospace Engineering, Rutgers University-New Brunswick, 98 Brett Road, Piscataway, NJ, 08854, USA
| | - Jeffrey Luo
- Department of Chemistry and Chemical Biology, Rutgers University-New Brunswick, 123 Bevier Rd, Piscataway, NJ, 08854, USA
| | - Marianne Polunas
- Research Pathology Services, Rutgers University-New Brunswick, 41 Gordon Road, Suite B, Piscataway, NJ, 08854, USA
| | - Nikola Bosnjak
- Department of Mechanical Engineering, New Jersey Institute of Technology, 200 Central Ave, Newark, NJ, 07102, USA
| | - Sy-Tsong Dean Chueng
- Department of Chemistry and Chemical Biology, Rutgers University-New Brunswick, 123 Bevier Rd, Piscataway, NJ, 08854, USA
| | - Michelle Chadwick
- Rutgers Cancer Institute of New Jersey, Rutgers University-New Brunswick, 195 Little Albany St, New Brunswick, NJ, 08901, USA
| | - Hatem E Sabaawy
- Rutgers Cancer Institute of New Jersey, Rutgers University-New Brunswick, 195 Little Albany St, New Brunswick, NJ, 08901, USA
| | - Shawn A Chester
- Department of Mechanical Engineering, New Jersey Institute of Technology, 200 Central Ave, Newark, NJ, 07102, USA
| | - Ki-Bum Lee
- Department of Chemistry and Chemical Biology, Rutgers University-New Brunswick, 123 Bevier Rd, Piscataway, NJ, 08854, USA
| | - Howon Lee
- Department of Mechanical and Aerospace Engineering, Rutgers University-New Brunswick, 98 Brett Road, Piscataway, NJ, 08854, USA
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21
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Xiao R, Huang WM. Heating/Solvent Responsive Shape-Memory Polymers for Implant Biomedical Devices in Minimally Invasive Surgery: Current Status and Challenge. Macromol Biosci 2020; 20:e2000108. [PMID: 32567193 DOI: 10.1002/mabi.202000108] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/03/2020] [Indexed: 12/16/2022]
Abstract
This review is about the fundamentals and practical issues in applying both heating and solvent responsive shape memory polymers (SMPs) for implant biomedical devices via minimally invasive surgery. After revealing the general requirements in the design of biomedical devices based on SMPs and the fundamentals for the shape-memory effect in SMPs, the underlying mechanisms, characterization methods, and several representative biomedical applications, including vascular stents, tissue scaffolds, occlusion devices, drug delivery systems, and the current R&D status of them, are discussed. The new opportunities arising from emerging technologies, such as 3D printing, and new materials, such as vitrimer, are also highlighted. Finally, the major challenge that limits the practical clinical applications of SMPs at present is addressed.
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Affiliation(s)
- Rui Xiao
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Wei Min Huang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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22
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Santiago D, Guzmán D, Ferrando F, Serra À, De la Flor S. Bio-Based Epoxy Shape-Memory Thermosets from Triglycidyl Phloroglucinol. Polymers (Basel) 2020; 12:polym12030542. [PMID: 32131508 PMCID: PMC7182903 DOI: 10.3390/polym12030542] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 02/27/2020] [Accepted: 02/28/2020] [Indexed: 11/16/2022] Open
Abstract
A series of bio-based epoxy shape-memory thermosetting polymers were synthesized starting from a triglycidyl phloroglucinol (3EPOPh) and trimethylolpropane triglycidyl ether (TPTE) as epoxy monomers and a polyetheramine (JEF) as crosslinking agent. The evolution of the curing process was studied by differential scanning calorimetry (DSC) and the materials obtained were characterized by means of DSC, thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), stress-strain tests, and microindentation. Shape-memory properties were evaluated under free and totally constrained conditions. All results were compared with an industrial epoxy thermoset prepared from standard diglycidyl ether of Bisphenol A (DGEBA). Results revealed that materials prepared from 3EPOPh were more reactive and showed a tighter network with higher crosslinking density and glass transition temperatures than the prepared from DGEBA. The partial substitution of 3EPOPh by TPTE as epoxy comonomer caused an increase in the molecular mobility of the materials but without worsening the thermal stability. The shape-memory polymers (SMPs) prepared from 3EPOPh showed good mechanical properties as well as an excellent shape-memory performance. They showed almost complete shape-recovery and shape-fixation, fast shape-recovery rates, and recovery stress up to 7 MPa. The results obtained in this study allow us to conclude that the triglycidyl phloroglucinol derivative of eugenol is a safe and environmentally friendly alternative to DGEBA for preparing thermosetting shape-memory polymers.
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Affiliation(s)
- David Santiago
- Eurecat—Chemical Technologies Unit, c/Marcel·lí Domingo 2, 43007 Tarragona, Spain;
- Department of Mechanical Engineering, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Spain; (F.F.); (S.D.l.F.)
- Correspondence:
| | - Dailyn Guzmán
- Eurecat—Chemical Technologies Unit, c/Marcel·lí Domingo 2, 43007 Tarragona, Spain;
| | - Francesc Ferrando
- Department of Mechanical Engineering, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Spain; (F.F.); (S.D.l.F.)
| | - Àngels Serra
- Department of Analytical and Organic Chemistry, University Rovira i Virgili, c/Marcel·lí Domingo 1, 43007 Tarragona, Spain;
| | - Silvia De la Flor
- Department of Mechanical Engineering, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Spain; (F.F.); (S.D.l.F.)
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23
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Noroozi R, Bodaghi M, Jafari H, Zolfagharian A, Fotouhi M. Shape-Adaptive Metastructures with Variable Bandgap Regions by 4D Printing. Polymers (Basel) 2020; 12:E519. [PMID: 32121481 DOI: 10.3390/polym12030519] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/14/2020] [Accepted: 02/24/2020] [Indexed: 01/21/2023] Open
Abstract
This article shows how four-dimensional (4D) printing technology can engineer adaptive metastructures that exploit resonating self-bending elements to filter vibrational and acoustic noises and change filtering ranges. Fused deposition modeling (FDM) is implemented to fabricate temperature-responsive shape-memory polymer (SMP) elements with self-bending features. Experiments are conducted to reveal how the speed of the 4D printer head can affect functionally graded prestrain regime, shape recovery and self-bending characteristics of the active elements. A 3D constitutive model, along with an in-house finite element (FE) method, is developed to replicate the shape recovery and self-bending of SMP beams 4D-printed at different speeds. Furthermore, a simple approach of prestrain modeling is introduced into the commercial FE software package to simulate material tailoring and self-bending mechanism. The accuracy of the straightforward FE approach is validated against experimental observations and computational results from the in-house FE MATLAB-based code. Two periodic architected temperature-sensitive metastructures with adaptive dynamical characteristics are proposed to use bandgap engineering to forbid specific frequencies from propagating through the material. The developed computational tool is finally implemented to numerically examine how bandgap size and frequency range can be controlled and broadened. It is found out that the size and frequency range of the bandgaps are linked to changes in the geometry of self-bending elements printed at different speeds. This research is likely to advance the state-of-the-art 4D printing and unlock potentials in the design of functional metastructures for a broad range of applications in acoustic and structural engineering, including sound wave filters and waveguides.
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24
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Park JK, Nan K, Luan H, Zheng N, Zhao S, Zhang H, Cheng X, Wang H, Li K, Xie T, Huang Y, Zhang Y, Kim S, Rogers JA. Remotely Triggered Assembly of 3D Mesostructures Through Shape-Memory Effects. Adv Mater 2019; 31:e1905715. [PMID: 31721341 DOI: 10.1002/adma.201905715] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 10/12/2019] [Indexed: 06/10/2023]
Abstract
3D structures that incorporate high-performance electronic materials and allow for remote, on-demand 3D shape reconfiguration are of interest for applications that range from ingestible medical devices and microrobotics to tunable optoelectronics. Here, materials and design approaches are introduced for assembly of such systems via controlled mechanical buckling of 2D precursors built on shape-memory polymer (SMP) substrates. The temporary shape fixing and recovery of SMPs, governed by thermomechanical loading, provide deterministic control over the assembly and reconfiguration processes, including a range of mechanical manipulations facilitated by the elastic and highly stretchable properties of the materials. Experimental demonstrations include 3D mesostructures of various geometries and length scales, as well as 3D aquatic platforms that can change trajectories and release small objects on demand. The results create many opportunities for advanced, programmable 3D microsystem technologies.
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Affiliation(s)
- Jun Kyu Park
- Department of Mechanical Sciences and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Kewang Nan
- Department of Mechanical Sciences and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
- Department of Bioengineering, Harvard University, Cambridge, MA, 02138, USA
| | - Haiwen Luan
- Center for Bio-Integrated Electronics, Department of Mechanical Engineering, Department of Civil and Environmental Engineering, Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Ning Zheng
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Shiwei Zhao
- Department of Mechanical Engineering, Department of Civil and Environmental Engineering, Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- School of Aeronautic Science and Engineering, Beihang University, Beijing, 100191, P. R. China
| | - Hang Zhang
- Applied Mechanics Laboratory, Department of Engineering Mechanics, Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Xu Cheng
- Applied Mechanics Laboratory, Department of Engineering Mechanics, Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Heling Wang
- Department of Mechanical Engineering, Department of Civil and Environmental Engineering, Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Kan Li
- Department of Mechanical Engineering, Department of Civil and Environmental Engineering, Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Engineering, University of Cambridge, Cambridge, CB2 1PZ, UK
| | - Tao Xie
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yonggang Huang
- Center for Bio-Integrated Electronics, Department of Mechanical Engineering, Department of Civil and Environmental Engineering, Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Yihui Zhang
- Applied Mechanics Laboratory, Department of Engineering Mechanics, Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Seok Kim
- Department of Mechanical Sciences and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - John A Rogers
- Departments of Materials Science and Engineering, Biomedical Engineering, Neurological Surgery, Chemistry, Mechanical Engineering, Electrical Engineering and Computer Science, Simpson Querrey Institute and Feinberg Medical School, Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, 60208, USA
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25
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Yamagishi K, Nojiri A, Iwase E, Hashimoto M. Syringe-Injectable, Self-Expandable, and Ultraconformable Magnetic Ultrathin Films. ACS Appl Mater Interfaces 2019; 11:41770-41779. [PMID: 31596561 DOI: 10.1021/acsami.9b17567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Syringe-injectable biomaterials and medical devices are important as minimally invasive implants for diagnosis, therapy, and regenerative medicine. Free-standing polymeric nanosheets with a thickness less than 1 μm and a flexural rigidity less than 10-2 nN m are a promising platform of syringe-injectable, implantable devices that provide conformable and long-term stable adhesion to the target biological tissues for in situ delivery of therapeutic materials. Here, we developed free-standing ultrathin films (<1 μm thick) based on polyurethane-based shape-memory polymer (SMP) and magnetic nanoparticles (MNP), termed MNP-SMP nanosheets. With the temperature-mediated shape-memory effect of SMP, we overcome the limitation in the manipulation of the conventional polymer nanosheets. In particular, we demonstrated the following four capabilities using the 710 nm thick MNP-SMP nanosheet with the glass transition temperature (Tg) of 25 °C: (1) syringe-injectability through the medical needles, (2) self-expandability after ejection, (3) conformability and removability on the biological surfaces, and (4) guidability in an external magnetic field. The MNP-SMP nanosheets were readily interfaced with an additional layer of poly(lactic-co-glycolic acid) (PLGA) to extend their functionality as a carrier of molecular and cellular drugs. The MNP-SMP nanosheets will contribute to the development of advanced syringe-injectable medical devices as a platform to deliver drugs, sensors, cells, and engineered tissues to the specific site or lesion in the body for minimally invasive diagnosis and therapy.
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Affiliation(s)
| | - Akihiro Nojiri
- Department of Applied Mechanics and Aerospace Engineering, Graduate School of Fundamental Science and Engineering , Waseda University , 3-4-1 Okubo , Shinjuku-ku , Tokyo 169-8555 , Japan
| | - Eiji Iwase
- Department of Applied Mechanics and Aerospace Engineering, Graduate School of Fundamental Science and Engineering , Waseda University , 3-4-1 Okubo , Shinjuku-ku , Tokyo 169-8555 , Japan
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26
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Deng S, Wu J, Dickey MD, Zhao Q, Xie T. Rapid Open-Air Digital Light 3D Printing of Thermoplastic Polymer. Adv Mater 2019; 31:e1903970. [PMID: 31402545 DOI: 10.1002/adma.201903970] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 07/22/2019] [Indexed: 05/17/2023]
Abstract
3D printing has witnessed a new era in which highly complexed customized products become reality. Realizing its ultimate potential requires simultaneous attainment of both printing speed and product versatility. Among various printing techniques, digital light processing (DLP) stands out in its high speed but is limited to intractable light curable thermosets. Thermoplastic polymers, despite their reprocessibility that allows more options for further manipulation, are restricted to intrinsically slow printing methods such as fused deposition modeling. Extending DLP to thermoplastics is highly desirable, but is challenging due to the need to reach rapid liquid-solid separation during the printing process. Here, a successful attempt at DLP printing of thermoplastic polymers is reported, realized by controlling two competing kinetic processes (polymerization and polymer dissolution) simultaneously occurring during printing. With a selected monomer, 4-acryloylmorpholine (ACMO), printing of thermoplastic 3D scaffolds is demonstrated, which can be further converted into various materials/devices utilizing its unique water-soluble characteristic. The ultralow viscosity of ACMO, along with surface oxygen inhibition, allows rapid liquid flow toward high-speed open-air printing. The process simplicity, enabling mechanism, and material versatility broaden the scope of 3D printing in constructing functional 3D devices including reconfigurable antenna, shape-shifting structures, and microfluidics.
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Affiliation(s)
- Shihong Deng
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Jingjun Wu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Michael D Dickey
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695-7905, USA
| | - Qian Zhao
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Tao Xie
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
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27
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Armstrong DP, Spontak RJ. Dielectric and Resistive Heating of Polymeric Media: Toward Remote Thermal Activation of Stimuli-Responsive Soft Materials. Macromol Rapid Commun 2018; 40:e1800669. [PMID: 30536997 DOI: 10.1002/marc.201800669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 10/23/2018] [Indexed: 11/08/2022]
Abstract
Stimuli-responsive soft materials are becoming increasingly important in a wide range of contemporary technologies, and methods by which to promote thermal stimulation remotely are of considerable interest for controllable device deployment, particularly in inaccessible environments such as outer space. Until now, remote thermal stimulation of responsive polymers has relied extensively on the use of nanocomposites wherein embedded nanoparticles/structures are selectively targeted for heating purposes. In this study, an alternative remote-heating mechanism demonstrates that the dielectric and resistive thermal losses introduced upon application of an alternating current generate sufficient heat to raise the temperature of a neat polyimide by over 70 °C within ≈10 s. Thermal imaging is used here to measure current-induced temperature changes of polymeric media, and a proposed analytical model yields predictions that compare reasonably well with experimental data, confirming that such remote heating is viable. Conditions permitting a shape-memory polymer possessing a melting transition and susceptible to dielectric actuation to achieve continuous electrostrain-temperature cycling are identified.
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Affiliation(s)
- Daniel P Armstrong
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695, USA
| | - Richard J Spontak
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695, USA.,Department of Materials Science & Engineering, North Carolina State University, Raleigh, NC, 27695, USA
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28
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Zhang Y, Li Y, Hu Y, Zhu X, Huang Y, Zhang Z, Rao S, Hu Z, Qiu W, Wang Y, Li G, Yang L, Li J, Wu D, Huang W, Qiu C, Chu J. Localized Self-Growth of Reconfigurable Architectures Induced by a Femtosecond Laser on a Shape-Memory Polymer. Adv Mater 2018; 30:e1803072. [PMID: 30259576 DOI: 10.1002/adma.201803072] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 08/03/2018] [Indexed: 06/08/2023]
Abstract
Architectures of natural organisms especially plants largely determine their response to varying external conditions. Nature-inspired shape transformation of artificial materials has motivated academic research for decades due to wide applications in smart textiles, actuators, soft robotics, and drug delivery. A "self-growth" method of controlling femtosecond laser scanning on the surface of a prestretched shape-memory polymer to realize microscale localized reconfigurable architectures transformation is introduced. It is discovered that microstructures can grow out of the original surface by intentional control of localized laser heating and ablation, and resultant structures can be further tuned by adopting an asymmetric laser scanning strategy. A distinguished paradigm of reconfigurable architectures is demonstrated by combining the flexible and programmable laser technique with a smart shape-memory polymer. Proof-of-concept experiments are performed respectively in information encryption/decryption, and microtarget capturing/release. The findings reveal new capacities of architectures with smart surfaces in various interdisciplinary fields including anti-counterfeiting, microstructure printing, and ultrasensitive detection.
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Affiliation(s)
- Yachao Zhang
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Ying Li
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583, Singapore
| | - Yanlei Hu
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Xuelin Zhu
- Centre for Micro and Nanoscale Research and Fabrication, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Yaowei Huang
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583, Singapore
- John A. Paulson School of Engineering and Applied Science, Harvard University, Cambridge, MA, 02138, USA
| | - Zhen Zhang
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Shenglong Rao
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Zhijiang Hu
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Weixin Qiu
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Yulong Wang
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Guoqiang Li
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
- Key Laboratory of Testing Technology for Manufacturing Process of Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Liang Yang
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Jiawen Li
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Dong Wu
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Wenhao Huang
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Chengwei Qiu
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583, Singapore
| | - Jiaru Chu
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China
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29
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Li G, Wang S, Liu Z, Liu Z, Xia H, Zhang C, Lu X, Jiang J, Zhao Y. 2D-to-3D Shape Transformation of Room-Temperature-Programmable Shape-Memory Polymers through Selective Suppression of Strain Relaxation. ACS Appl Mater Interfaces 2018; 10:40189-40197. [PMID: 30372013 DOI: 10.1021/acsami.8b16094] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Although shape-memory polymers (SMPs) can alter their shapes upon stimulation of environmental signals, complex shape transformations are usually realized by using advanced processing technologies (four-dimensional printing) and complicated polymer structure design or localized activation. Herein, we demonstrate that stepwise controlled complex shape transformations can be obtained from a single flat piece of SMP upon uniform heating. The shape-memory blends prepared by solution casting of poly(ethylene oxide) and poly(acrylic acid) (PAA) exhibit excellent mechanical and room-temperature shape-memory behaviors, with fracture strain beyond 800% and both shape memory and shape recovery ratio higher than 90%. After plastic deformation by stretching under ambient conditions, the material is surface-patterned to induce the formation of an Fe3+-coordinated PAA network with gradually altered cross-linking density along the thickness direction at desired areas. Upon subsequent heating for shape recovery, strain release is restricted by the PAA network to different extents depending on the cross-linking density, which results in bending deformation toward the nonpatterned side and leads to three-dimensional shape transformation of the SMP. More interestingly, by sequentially dissociating the PAA network via UV or visible light-induced photoreduction of Fe3+ to Fe2+, residual strains can be removed in a spatially controlled manner. Using this approach, a series of origami shapes are obtained from a single SMP with a tailored two-dimensional initial shape. We also demonstrate that by incorporating polydopamine nanoparticles as photothermal fillers into the material, the whole shape transformation process can be carried out at room temperature by using near-infrared light.
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Affiliation(s)
- Guo Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an , Shaanxi Province 710062 , China
| | - Shuwei Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an , Shaanxi Province 710062 , China
| | - Zhaotie Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an , Shaanxi Province 710062 , China
| | - Zhongwen Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an , Shaanxi Province 710062 , China
| | - Hesheng Xia
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute , Sichuan University , Chengdu 610065 , China
| | - Chun Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute , Sichuan University , Chengdu 610065 , China
| | - Xili Lu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute , Sichuan University , Chengdu 610065 , China
- Département de chimie , Université de Sherbrooke , Sherbrooke , Québec J1K 2R1 , Canada
| | - Jinqiang Jiang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an , Shaanxi Province 710062 , China
| | - Yue Zhao
- Département de chimie , Université de Sherbrooke , Sherbrooke , Québec J1K 2R1 , Canada
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30
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Schauer S, Baumberg JJ, Hölscher H, Smoukov SK. Tuning of Structural Colors Like a Chameleon Enabled by Shape-Memory Polymers. Macromol Rapid Commun 2018; 39:e1800518. [PMID: 30207618 DOI: 10.1002/marc.201800518] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Indexed: 11/09/2022]
Abstract
Nature often uses structuring of materials for coloration rather than incorporating dye molecules, since single-construction materials are capable of producing any vivid visible color in plants and insects. By precisely engineering features that diffract or scatter light, more recently, humans have created similarly intense non-fading colors. Stretchable polymer opals have emerged as a single material which can dynamically shift across the whole visible spectrum using structural colors, by temporary stretching or compression. For energy efficiency and practical considerations, however, it is necessary to fix semi-permanently desired colors without continuous stretching or application of other stimuli or energy. Here, a polymer opal incorporating a shape-memory polymer embedded in its matrix can keep a particular color fixed without the application of external forces, yet can be reprogrammed to a different fixed color on demand. The influence of the material composition on its optical appearance, shape-fixity, and shape recovery abilities in controlled stretch experiments is quantified. High-speed printing-compatible localized compression pattern imprinting is shown to generate stable but easily erasable color patterns. This opens up the potential for durable and energy-efficient yet reusable and reconfigurable displays, wearables, or packaging and security labeling based on such polymeric film materials.
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Affiliation(s)
- Senta Schauer
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Jeremy J Baumberg
- Nanophotonics Centre, Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, UK
| | - Hendrik Hölscher
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Stoyan K Smoukov
- School of Engineering and Materials Science, Queen Mary University of London, London, E1 4NS, UK.,Department of Material Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK.,Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, 1 James Bourchier Ave., 1164, Sofia, Bulgaria
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31
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Toncheva A, Khelifa F, Paint Y, Voué M, Lambert P, Dubois P, Raquez JM. Fast IR-Actuated Shape-Memory Polymers Using in Situ Silver Nanoparticle-Grafted Cellulose Nanocrystals. ACS Appl Mater Interfaces 2018; 10:29933-29942. [PMID: 30092638 DOI: 10.1021/acsami.8b10159] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In recent years, shape-memory polymers (SMPs) have gained a key position in the realm of actuating applications from daily life products to biomedical and aeronautic devices. Most of these SMPs rely mainly on shape changes upon direct heat exposure or after stimulus conversion (e.g., magnetic field and light) to heat, but this concept remains significantly limited when both remote control and fine actuation are demanded. In the present study, we propose to design plasmonic silver nanoparticles (AgNPs) grafted onto cellulose nanocrystals (CNCs) as an efficient plasmonic system for fast and remote actuation. Such CNC- g-AgNPs "nanorod-like" structures thereby allowed for a long-distance and strong coupling plasmonic effect between the AgNPs along the CNC axis, thus ensuring a fast photothermal shape-recovery effect upon IR light illumination. To demonstrate the fast and remote actuation promoted by these structures, we incorporated them at low loading (1 wt %) into poly(ε-caprolactone) (PCL)-based networks with shape-memory properties. These polymer matrix networks were practically designed from biocompatible PCL oligomers end-functionalized with maleimide and furan moieties in the melt on the basis of thermoreversible Diels-Alder reactions. The as-produced materials could find application in the realm of soft robotics for remote object transportation or as smart biomaterials such as self-tightening knots with antibacterial properties related to the presence of the AgNPs.
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Affiliation(s)
- Antoniya Toncheva
- Laboratory of Polymeric and Composite Materials , University of Mons , 23 Place du Parc , Mons 7000 , Belgium
- Laboratory of Bioactive Polymers, Institute of Polymers , Bulgarian Academy of Sciences , 103A Academik G. Bonchev Street , Sofia 1113 , Bulgaria
| | - Farid Khelifa
- Laboratory of Polymeric and Composite Materials , University of Mons , 23 Place du Parc , Mons 7000 , Belgium
| | - Yoann Paint
- Analysis and Characterization Unit , Materia Nova , 1 Avenue Copernic , Mons 7000 , Belgium
| | - Michel Voué
- Materials Physics and Optics , University of Mons , 20 Place du Parc , Mons 7000 , Belgium
| | - Pierre Lambert
- BioElectro and Mechanical Systems Department , Free University of Brussels , 50 Avenue F.D. Roosevelt , Brussels 1050 , Belgium
| | - Philippe Dubois
- Laboratory of Polymeric and Composite Materials , University of Mons , 23 Place du Parc , Mons 7000 , Belgium
| | - Jean-Marie Raquez
- Laboratory of Polymeric and Composite Materials , University of Mons , 23 Place du Parc , Mons 7000 , Belgium
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32
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McBride MK, Podgorski M, Chatani S, Worrell BT, Bowman CN. Thermoreversible Folding as a Route to the Unique Shape-Memory Character in Ductile Polymer Networks. ACS Appl Mater Interfaces 2018; 10:22739-22745. [PMID: 29882403 DOI: 10.1021/acsami.8b06004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ductile, cross-linked films were folded as a means to program temporary shapes without the need for complex heating cycles or specialized equipment. Certain cross-linked polymer networks, formed here with the thiol-isocyanate reaction, possessed the ability to be pseudoplastically deformed below the glass transition, and the original shape was recovered during heating through the glass transition. To circumvent the large forces required to plastically deform a glassy polymer network, we have utilized folding, which localizes the deformation in small creases, and achieved large dimensional changes with simple programming procedures. In addition to dimension changes, three-dimensional objects such as swans and airplanes were developed to demonstrate applying origami principles to shape memory. We explored the fundamental mechanical properties that are required to fold polymer sheets and observed that a yield point that does not correspond to catastrophic failure is required. Unfolding occurred during heating through the glass transition, indicating the vitrification of the network that maintained the temporary, folded shape. Folding was demonstrated as a powerful tool to simply and effectively program ductile shape-memory polymers without the need for thermal cycling.
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Affiliation(s)
- Matthew K McBride
- Department of Chemical and Biological Engineering , University of Colorado Boulder , 596 UCB , Boulder , Colorado 80309 , United States
| | - Maciej Podgorski
- Department of Chemical and Biological Engineering , University of Colorado Boulder , 596 UCB , Boulder , Colorado 80309 , United States
- Faculty of Chemistry, Department of Polymer Chemistry , MCS University, Marii Curie-Skłodowskiej , Lublin 20-031 , Poland (M.P.)
| | - Shunsuke Chatani
- Department of Chemical and Biological Engineering , University of Colorado Boulder , 596 UCB , Boulder , Colorado 80309 , United States
| | - Brady T Worrell
- Department of Chemical and Biological Engineering , University of Colorado Boulder , 596 UCB , Boulder , Colorado 80309 , United States
| | - Christopher N Bowman
- Department of Chemical and Biological Engineering , University of Colorado Boulder , 596 UCB , Boulder , Colorado 80309 , United States
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Xiang Z, Zhang L, Yuan T, Li Y, Sun J. Healability Demonstrates Enhanced Shape-Recovery of Graphene-Oxide-Reinforced Shape-Memory Polymeric Films. ACS Appl Mater Interfaces 2018; 10:2897-2906. [PMID: 29256583 DOI: 10.1021/acsami.7b14588] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The fabrication of shape-memory polymers or films that can simultaneously heal the mechanical damage and the fatigued shape-memory function remains challenging. In this study, mechanically robust healable shape-memory polymeric films that can heal the mechanical damage and the fatigued shape-memory function in the presence of water are fabricated by layer-by-layer assembly of branched poly(ethylenimine) (bPEI)-graphene oxide (GO) complexes with poly(acrylic acid) (PAA), followed by the release of the (PAA/bPEI-GO)*n films from the underlying substrates. The free-standing (PAA/bPEI-GO0.02)*35 films made of bPEI-GO complexes with a mass ratio of 0.02 between GO nanosheets and bPEI are mechanically robust with a Young's modulus of 19.8 ± 2.1 GPa and a hardness of 0.92 ± 0.15 GPa and exhibit excellent humidity-induced healing and shape-memory functions. Benefiting from the highly efficient healing function, the (PAA/bPEI-GO0.02)*35 films can heal cuts penetrating thorough the entire film and achieve an ∼100% shape-recovery ratio for a long-term shape-memory application. Meanwhile, the shape-memory function of the mechanically damaged (PAA/bPEI-GO0.02)*35 films can be finely restored after being healed in water. The shape-memory functions of the (PAA/bPEI-GO0.02)*35 films and their healing capacity originate from the reversibility of electrostatic and hydrogen-bonding interactions induced by water between PAA and bPEI-GO complexes.
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Affiliation(s)
- Zilong Xiang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, PR China
| | - Ling Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, PR China
| | - Tao Yuan
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, PR China
| | - Yixuan Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, PR China
| | - Junqi Sun
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, PR China
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Ghobadi E, Elsayed M, Krause-Rehberg R, Steeb H. Demonstrating the Influence of Physical Aging on the Functional Properties of Shape-Memory Polymers. Polymers (Basel) 2018; 10:polym10020107. [PMID: 30966144 PMCID: PMC6415025 DOI: 10.3390/polym10020107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 01/13/2018] [Accepted: 01/15/2018] [Indexed: 11/18/2022] Open
Abstract
Polymers that allow the adjustment of Shape-Memory properties by the variation of physical parameters during programming are advantageous compared with their counterparts requiring synthesis of new material. Here, we explored the influence of hydrolytic (physical) aging on the Shape-Memory properties of the polyetherurethane system Estane, programmed in repeated thermomechanical cycles under torsional load. We were able to demonstrate that physical aging occurred through water adsorption influencing the existing free volume of the samples as well as the functional properties of Estane. Dynamic Mechanical Thermal Analysis determined the glass transition temperatures of dry and hydrolytically aged samples. According to our results, Estane takes up to 3 wt % water for two weeks (at an ambient temperature of θ = 20 °C). The glass transition temperatures of dry samples decreased within this period from 55 to 48 °C as a consequence of a plasticization effect. Next, for both samples, six subsequent thermomechanical cycles under torsional loading conditions were performed. We were able to confirm that hydrolytically aged samples showed higher shape recovery ratios of Rr ≥ 97%, although dry samples revealed better shape fixity values of about 98%. Moreover, it was observed that the shape fixity ratio of both dry and hydrolytically (physically) aged samples remained almost unchanged even after six successive cycles. Besides this, the shape recovery ratio values of the aged samples were nearly unaltered, although the shape recovery values of the dry samples increased from Rr = 81% in the first cycle to 96% at the end of six repeated cycles. Further, the evolution of the free volume as a function of temperature was studied using Positron Annihilation Lifetime Spectroscopy. It was shown that the uptake of two other organic solvents (acetone and ethanol) resulted in much higher specific free volume inside the samples and, consequently, a softening effect was observed. We anticipate that the presented approach will assist in defining design criteria for self-sufficiently moving scaffolds within a knowledge-based development process.
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Affiliation(s)
- Ehsan Ghobadi
- Institute of Mechanics (CE), University of Stuttgart, 70565 Stuttgart, Germany.
| | - Mohamed Elsayed
- Faculty of Natural Sciences II-Chemistry, Physics and Mathematics, Martin-Luther-University Halle, 06120 Halle, Germany.
- Department of Physics, Faculty of Science, Minia University, 61519 Minia, Egypt.
| | - Reinhard Krause-Rehberg
- Faculty of Natural Sciences II-Chemistry, Physics and Mathematics, Martin-Luther-University Halle, 06120 Halle, Germany.
| | - Holger Steeb
- Institute of Mechanics (CE), University of Stuttgart, 70565 Stuttgart, Germany.
- SimTech, University of Stuttgart, 70565 Stuttgart, Germany.
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Díaz Lantada A. Systematic Development Strategy for Smart Devices Based on Shape-Memory Polymers. Polymers (Basel) 2017; 9:polym9100496. [PMID: 30965799 PMCID: PMC6418897 DOI: 10.3390/polym9100496] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 09/29/2017] [Accepted: 09/29/2017] [Indexed: 11/16/2022] Open
Abstract
Shape-memory polymers are outstanding "smart" materials, which can perform important geometrical changes, when activated by several types of external stimuli, and which can be applied to several emerging engineering fields, from aerospace applications, to the development of biomedical devices. The fact that several shape-memory polymers can be structured in an additive way is an especially noteworthy advantage, as the development of advanced actuators with complex geometries for improved performance can be achieved, if adequate design and manufacturing considerations are taken into consideration. Present study presents a review of challenges and good practices, leading to a straightforward methodology (or integration of strategies), for the development of "smart" actuators based on shape-memory polymers. The combination of computer-aided design, computer-aided engineering and additive manufacturing technologies is analyzed and applied to the complete development of interesting shape-memory polymer-based actuators. Aspects such as geometrical design and optimization, development of the activation system, selection of the adequate materials and related manufacturing technologies, training of the shape-memory effect, final integration and testing are considered, as key processes of the methodology. Current trends, including the use of low-cost 3D and 4D printing, and main challenges, including process eco-efficiency and biocompatibility, are also discussed and their impact on the proposed methodology is considered.
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Affiliation(s)
- Andrés Díaz Lantada
- Product Development Lab, Mechanical Engineering Department, Universidad Politecnica de Madrid, C/Jose Gutierrez Abascal 2, 28006 Madrid, Spain.
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36
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Abstract
There exist many methods for processing of materials: extrusion, injection molding, fibers spinning, 3D printing, to name a few. In most cases, materials with a static, fixed shape are produced. However, numerous advanced applications require customized elements with reconfigurable shape. The few available techniques capable of overcoming this problem are expensive and/or time-consuming. Here, the use of one of the most ancient technologies for structuring, embroidering, is proposed to generate sophisticated patterns of active materials, and, in this way, to achieve complex actuation. By combining experiments and computational modeling, the fundamental rules that can predict the folding behavior of sheets with a variety of stitch-patterns are elucidated. It is demonstrated that theoretical mechanics analysis is only suitable to predict the behavior of the simplest experimental setups, whereas computer modeling gives better predictions for more complex cases. Finally, the applicability of the rules by designing basic origami structures and wrinkling substrates with controlled thermal insulation properties is shown.
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Affiliation(s)
- Georgi Stoychev
- College of Family and Consumer Sciences, University of Georgia, Athens, GA, 30602, USA.,Driftmier Engineering Center, UGA College of Engineering, 597 DW Brooks Drive, Athens, GA, 30602, USA
| | - Mir Jalil Razavi
- Driftmier Engineering Center, UGA College of Engineering, 597 DW Brooks Drive, Athens, GA, 30602, USA
| | - Xianqiao Wang
- Driftmier Engineering Center, UGA College of Engineering, 597 DW Brooks Drive, Athens, GA, 30602, USA
| | - Leonid Ionov
- College of Family and Consumer Sciences, University of Georgia, Athens, GA, 30602, USA.,Driftmier Engineering Center, UGA College of Engineering, 597 DW Brooks Drive, Athens, GA, 30602, USA
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Uto K, Aoyagi T, DeForest CA, Hoffman AS, Ebara M. A Combinational Effect of "Bulk" and "Surface" Shape-Memory Transitions on the Regulation of Cell Alignment. Adv Healthc Mater 2017; 6. [PMID: 28169506 DOI: 10.1002/adhm.201601439] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Indexed: 12/23/2022]
Abstract
A novel shape-memory cell culture platform has been designed that is capable of simultaneously tuning surface topography and dimensionality to manipulate cell alignment. By crosslinking poly(ε-caprolactone) (PCL) macromonomers of precisely designed nanoarchitectures, a shape-memory PCL with switching temperature near body temperature is successfully prepared. The temporary strain-fixed PCLs are prepared by processing through heating, stretching, and cooling about the switching temperature. Temporary nanowrinkles are also formed spontaneously during the strain-fixing process with magnitudes that are dependent on the applied strain. The surface features completely transform from wrinkled to smooth upon shape-memory activation over a narrow temperature range. Shape-memory activation also triggers dimensional deformation in an initial fixed strain-dependent manner. A dynamic cell-orienting study demonstrates that surface topographical changes play a dominant role in cell alignment for samples with lower fixed strain, while dimensional changes play a dominant role in cell alignment for samples with higher fixed strain. The proposed shape-memory cell culture platform will become a powerful tool to investigate the effects of spatiotemporally presented mechanostructural stimuli on cell fate.
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Affiliation(s)
- Koichiro Uto
- International Research Center for Materials Nanoarchitectonics (WPI-MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba 305-0044 Japan
| | - Takao Aoyagi
- International Research Center for Materials Nanoarchitectonics (WPI-MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba 305-0044 Japan
| | - Cole A. DeForest
- Department of Chemical Engineering; University of Washington; 4000 15 Ave NE Seattle WA 98195 USA
| | - Allan S. Hoffman
- Department of Bioengineering; University of Washington; 3720 15 Ave NE Seattle WA 98195 USA
| | - Mitsuhiro Ebara
- International Research Center for Materials Nanoarchitectonics (WPI-MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba 305-0044 Japan
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Hornat CC, Yang Y, Urban MW. Quantitative Predictions of Shape-Memory Effects in Polymers. Adv Mater 2017; 29:1603334. [PMID: 27966797 DOI: 10.1002/adma.201603334] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 08/29/2016] [Indexed: 05/23/2023]
Abstract
Unique shape-memory transitions manifested by directional extension and subsequent retraction in polymers are attributed to stored conformational entropy. This behavior is quantified in terms of stored (ΔS S ) entropic energy density, the maximum strain (εmax ), and stress (σSF at εmax ). This concept allows quantitative assessments of the shape-memory effect (SME) and can be utilized in any material that exhibits a glass-transition temperature (T g ) and a rubbery plateau.
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Affiliation(s)
- Chris C Hornat
- Department of Materials Science and Engineering, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Clemson, SC, 29634, USA
| | - Ying Yang
- Department of Materials Science and Engineering, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Clemson, SC, 29634, USA
| | - Marek W Urban
- Department of Materials Science and Engineering, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Clemson, SC, 29634, USA
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Hardy JG, Palma M, Wind SJ, Biggs MJ. Responsive Biomaterials: Advances in Materials Based on Shape-Memory Polymers. Adv Mater 2016; 28:5717-5724. [PMID: 27120512 DOI: 10.1002/adma.201505417] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 01/26/2016] [Indexed: 06/05/2023]
Abstract
Shape-memory polymers (SMPs) are morphologically responsive materials with potential for a variety of biomedical applications, particularly as devices for minimally invasive surgery and the delivery of therapeutics and cells for tissue engineering. A brief introduction to SMPs is followed by a discussion of the current progress toward the development of SMP-based biomaterials for clinically relevant biomedical applications.
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Affiliation(s)
- John G Hardy
- Department of Chemistry, Lancaster University, Lancaster, Lancashire, LA1 4YB, UK
- Materials Science Institute, Lancaster University, Lancaster, Lancashire, LA1 4YB, UK
| | - Matteo Palma
- The School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Shalom J Wind
- Applied Physics and Applied Math, Columbia University, 1020 CEPSR, Mail Code: 8903, New York, NY, 10027, USA
| | - Manus J Biggs
- Centre for Research in Medical Devices, National University of Ireland Galway, Biosciences Research Building, Newcastle Road, Dangan, Ireland
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40
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Abstract
Shape-memory polymers (SMPs) are a new class of smart materials, which have the capability to change from a temporary shape 'A' to a memorized permanent shape 'B' upon application of an external stimulus. In recent years, SMPs have attracted much attention from basic and fundamental research to industrial and practical applications due to the cheap and efficient alternative to well-known metallic shape-memory alloys. Since the shape-memory effect in SMPs is not related to a specific material property of single polymers, the control of nanoarchitecture of polymer networks is particularly important for the smart functions of SMPs. Such nanoarchitectonic approaches have enabled us to further create shape-memory surfaces (SMSs) with tunable surface topography at nano scale. The present review aims to bring together the exciting design of SMSs and the ever-expanding range of their uses as tools to control cell functions. The goal for these endeavors is to mimic the surrounding mechanical cues of extracellular environments which have been considered as critical parameters in cell fate determination. The untapped potential of SMSs makes them one of the most exciting interfaces of materials science and cell mechanobiology.
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Affiliation(s)
- Mitsuhiro Ebara
- Biomaterials Unit, International Center for Materials Nanoarchitectonics (WPI-MANA), Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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41
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Baker RM, Brasch ME, Manning ML, Henderson JH. Automated, contour-based tracking and analysis of cell behaviour over long time scales in environments of varying complexity and cell density. J R Soc Interface 2015; 11:20140386. [PMID: 24920119 DOI: 10.1098/rsif.2014.0386] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Understanding single and collective cell motility in model environments is foundational to many current research efforts in biology and bioengineering. To elucidate subtle differences in cell behaviour despite cell-to-cell variability, we introduce an algorithm for tracking large numbers of cells for long time periods and present a set of physics-based metrics that quantify differences in cell trajectories. Our algorithm, termed automated contour-based tracking for in vitro environments (ACTIVE), was designed for adherent cell populations subject to nuclear staining or transfection. ACTIVE is distinct from existing tracking software because it accommodates both variability in image intensity and multi-cell interactions, such as divisions and occlusions. When applied to low-contrast images from live-cell experiments, ACTIVE reduced error in analysing cell occlusion events by as much as 43% compared with a benchmark-tracking program while simultaneously tracking cell divisions and resulting daughter-daughter cell relationships. The large dataset generated by ACTIVE allowed us to develop metrics that capture subtle differences between cell trajectories on different substrates. We present cell motility data for thousands of cells studied at varying densities on shape-memory-polymer-based nanotopographies and identify several quantitative differences, including an unanticipated difference between two 'control' substrates. We expect that ACTIVE will be immediately useful to researchers who require accurate, long-time-scale motility data for many cells.
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Affiliation(s)
- Richard M Baker
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA Syracuse Biomaterials Institute, Syracuse University, Syracuse, NY 13244, USA
| | - Megan E Brasch
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA Syracuse Biomaterials Institute, Syracuse University, Syracuse, NY 13244, USA
| | - M Lisa Manning
- Syracuse Biomaterials Institute, Syracuse University, Syracuse, NY 13244, USA Department of Physics, Syracuse University, Syracuse, NY 13244, USA
| | - James H Henderson
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA Syracuse Biomaterials Institute, Syracuse University, Syracuse, NY 13244, USA
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42
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Kohlmeyer RR, Buskohl PR, Deneault JR, Durstock MF, Vaia RA, Chen J. Shape-reprogrammable polymers: encoding, erasing, and re-encoding. Adv Mater 2014; 26:8114-8119. [PMID: 25323148 DOI: 10.1002/adma.201402901] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 08/21/2014] [Indexed: 06/04/2023]
Abstract
Shape-reprogramming in a polymer is demonstrated, where prescribed 3D geometric information can be encoded, decoded, erased, and re-encoded. In essence, the shape-reprogrammable polymer (SRP) acts as computer hardware that can be reformatted and reprogrammed repeatedly. Such SRPs have the potential to be repurposed directly without going through material disposal and recycling.
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Affiliation(s)
- Ryan R Kohlmeyer
- National Research Council, Washington, D.C., 20001, USA; Soft Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, Ohio, 45433, USA; Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, 53211, USA
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43
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Hasan SM, Raymond JE, Wilson TS, Keller BK, Maitland DJ. Effects of Isophorone Diisocyanate on the Thermal and Mechanical Properties of Shape-Memory Polyurethane Foams. MACROMOL CHEM PHYS 2014; 215:2420-2429. [PMID: 30220825 PMCID: PMC6136255 DOI: 10.1002/macp.201400407] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Previously developed shape-memory polymer foams display fast actuation in water due to plasticization of the polymer network. The actuation presents itself as a depression in the glass-transition temperature when moving from dry to aqueous conditions; this effect limits the working time of the foam to 10 min when used in a transcatheter embolic device. Reproducible foams are developed by altering the chemical backbone, which can achieve working times of greater than 20 min. This is accomplished by incorporating isophorone diisocyanate into the foam, resulting in increased hydrophobicity, glass transitions, and actuation time. This delayed actuation, when compared with previous systems, allows for more optimal working time in clinical applications.
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Affiliation(s)
- Sayyeda M Hasan
- Department of Biomedical Engineering, 5045 Emerging Technologies Building, 3120 TAMU, College Station, TX-77843, USA
| | - Jeffery E Raymond
- Department of Chemistry, 1031 Chemistry Complex, 3012 TAMU, College Station, TX-77842, USA
| | - Thomas S Wilson
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA-94550, USA
| | - Brandis K Keller
- Department of Biomedical Engineering, 5045 Emerging Technologies Building, 3120 TAMU, College Station, TX-77843, USA
| | - Duncan J Maitland
- Department of Biomedical Engineering, 5045 Emerging Technologies Building, 3120 TAMU, College Station, TX-77843, USA
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Reeder J, Kaltenbrunner M, Ware T, Arreaga-Salas D, Avendano-Bolivar A, Yokota T, Inoue Y, Sekino M, Voit W, Sekitani T, Someya T. Mechanically adaptive organic transistors for implantable electronics. Adv Mater 2014; 26:4967-4973. [PMID: 24733490 DOI: 10.1002/adma.201400420] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Revised: 02/19/2014] [Indexed: 06/03/2023]
Abstract
A unique form of adaptive electronics is demonstrated, which change their mechanical properties from rigid and planar to soft and compliant, in order to enable soft and conformal wrapping around 3D objects, including biological tissue. These devices feature excellent mechanical robustness and maintain initial electrical properties even after changing shape and stiffness.
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Affiliation(s)
- Jonathan Reeder
- Electrical and Electronic Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan; Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, Texas, 75080-3021, USA
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45
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Abstract
The miniaturization and retained full shape-memory functionality with particle switching to different predefined shapes is reported for semi-crystalline multiblock copolymer matrices with all dimensions in the low micrometer-range. A matrix size-induced reduction of crystallinity suggests limitations of functionality in the low nanometer range. Applications as actuators in microdevices or as microcarriers with switchable shapes for modulated biorecognition are suggested.
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Affiliation(s)
- Christian Wischke
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany
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46
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Lantada AD, Rebollo MS. Towards Low-Cost Effective and Homogeneous Thermal Activation of Shape Memory Polymers. Materials (Basel) 2013; 6:5447-65. [PMID: 28788401 DOI: 10.3390/ma6125447] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 10/30/2013] [Accepted: 11/12/2013] [Indexed: 11/23/2022]
Abstract
A typical limitation of intelligent devices based on the use of shape-memory polymers as actuators is linked to the widespread use of distributed heating resistors, via Joule effect, as activation method, which involves several relevant issues needing attention, such as: (a) Final device size is importantly increased due to the additional space required for the resistances; (b) the use of resistances limits materials’ strength and the obtained devices are normally weaker; (c) the activation process through heating resistances is not homogeneous, thus leading to important temperature differences among the polymeric structure and to undesirable thermal gradients and stresses, also limiting the application fields of shape-memory polymers. In our present work we describe interesting activation alternatives, based on coating shape-memory polymers with different kinds of conductive materials, including textiles, conductive threads and conductive paint, which stand out for their easy, rapid and very cheap implementation. Distributed heating and homogeneous activation can be achieved in several of the alternatives studied and the technical results are comparable to those obtained by using advanced shape-memory nanocomposites, which have to deal with complex synthesis, processing and security aspects. Different combinations of shape memory epoxy resin with several coating electrotextiles, conductive films and paints are prepared, simulated with the help of thermal finite element method based resources and characterized using infrared thermography for validating the simulations and overall design process. A final application linked to an active catheter pincer is detailed and the advantages of using distributed heating instead of conventional resistors are discussed.
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Lu H, Huang WM, Liang F, Yu K. Nanoscale Design of Nano-Sized Particles in Shape-Memory Polymer Nanocomposites Driven by Electricity. Materials (Basel) 2013; 6:3742-3754. [PMID: 28788303 PMCID: PMC5452653 DOI: 10.3390/ma6093742] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 08/06/2013] [Accepted: 08/09/2013] [Indexed: 11/16/2022]
Abstract
In the last few years, we have witnessed significant progress in developing high performance shape memory polymer (SMP) nanocomposites, in particular, for shape recovery activated by indirect heating in the presence of electricity, magnetism, light, radio frequency, microwave and radiation, etc. In this paper, we critically review recent findings in Joule heating of SMP nanocomposites incorporated with nanosized conductive electromagnetic particles by means of nanoscale control via applying an electro- and/or magnetic field. A few different nanoscale design principles to form one-/two-/three- dimensional conductive networks are discussed.
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Affiliation(s)
- Haibao Lu
- Science and Technology on Advanced Composites in Special Environments Laboratory, Harbin Institute of Technology (HIT), Harbin 150080, China.
| | - Wei Min Huang
- School of Mechanical & Aerospace Engineering College of Engineering, Nanyang Technological University, 639798, Singapore
| | - Fei Liang
- Department of Mechanical, Materials & Aerospace Engineering, University of Central Florida, Orlando 32826, FL, USA
| | - Kai Yu
- Science and Technology on Advanced Composites in Special Environments Laboratory, Harbin Institute of Technology (HIT), Harbin 150080, China
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48
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Iqbal D, Samiullah MH. Photo-Responsive Shape-Memory and Shape-Changing Liquid-Crystal Polymer Networks. Materials (Basel) 2013; 6:116-142. [PMID: 28809298 PMCID: PMC5452121 DOI: 10.3390/ma6010116] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 12/14/2012] [Accepted: 12/24/2012] [Indexed: 11/17/2022]
Abstract
"Surrounding matters" is a phrase that has become more significant in recent times when discussing polymeric materials. Although regular polymers do respond to external stimuli like softening of material at higher temperatures, that response is gradual and linear in nature. Smart polymers (SPs) or stimuli-responsive polymers (SRPs) behave differently to those external stimuli, as their behavior is more rapid and nonlinear in nature and even a small magnitude of external stimulus can cause noticeable changes in their shape, size, color or conductivity. Of these SRPs, two types of SPs with the ability to actively change can be differentiated: shape-memory polymers and shape-changing polymers. The uniqueness of these materials lies not only in the fast macroscopic changes occurring in their structure but also in that some of these shape changes are reversible. This paper presents a brief review of current progress in the area of light activated shape-memory polymers and shape-changing polymers and their possible field of applications.
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Affiliation(s)
- Danish Iqbal
- Max-Planck-Institut für Eisen Forschung GmbH, Max-Planck-str.1, 40237, Düsseldorf, Germany.
| | - Muhammad Haris Samiullah
- Institute of Chemistry, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle, Germany.
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