1
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Ince JC, Duffy AR, Salim NV. Silver Coated Multifunctional Liquid Crystalline Elastomer Polymeric Composites as Electro-Responsive and Piezo-Resistive Artificial Muscles. Macromol Rapid Commun 2024:e2400370. [PMID: 38873978 DOI: 10.1002/marc.202400370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Indexed: 06/15/2024]
Abstract
Liquid crystalline elastomers (LCEs) are a class of shape-changing polymers with exceptional mechanical properties and potential as artificial muscles/polymer actuators. In this study, multifunctional LCE actuators with strain sensing and joule heating responsivity are developed. LCEs are successfully synthesized using the thiol-ene two-staged michael addition polymerization (TMAP) method. The LCE films are further functionalized via sequential polydopamine (PDA) and silver electroless coating. It is found that the PDA coating enabled the anchoring of the Ag particles to the LCE, thereby enabling the electrical conductivity of the Ag-LCEs (<0.1 Ω cm-1). The studies confirm that the Ag/PDA coated LCEs can sense up to ≈30% strain, sense their own actuation strokes, and actuate at a rate of 1.83% s-1 while lifting a weight ≈50 times its mass in response to a 12 V 2A DC current.
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Affiliation(s)
- Joshua C Ince
- Department of Mechanical Engineering and Product Design Engineering, Swinburne University of Technology, Hawthorn, Melbourne, VIC, 3122, Australia
| | - Alan R Duffy
- Centre for Astronomy and Supercomputing, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia
| | - Nisa V Salim
- Department of Mechanical Engineering and Product Design Engineering, Swinburne University of Technology, Hawthorn, Melbourne, VIC, 3122, Australia
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2
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Oguntade E, Wigham C, Owuor L, Aryal U, O'Grady K, Acierto A, Zha RH, Henderson JH. Dry and wet wrinkling of a silk fibroin biopolymer by a shape-memory material with insight into mechanical effects on secondary structures in the silk network. J Mater Chem B 2024. [PMID: 38864220 DOI: 10.1039/d4tb00112e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Surface wrinkling provides an approach to modify the surfaces of biomedical devices to better mimic features of the extracellular matrix and guide cell attachment, proliferation, and differentiation. Biopolymer wrinkling on active materials holds promise but is poorly explored. Here we report a mechanically actuated assembly process to generate uniaxial micro-and nanosized silk fibroin (SF) wrinkles on a thermo-responsive shape-memory polymer (SMP) substrate, with wrinkling demonstrated under both dry and hydrated (cell compatible) conditions. By systematically investigating the influence of SMP programmed strain magnitude, film thickness, and aqueous media on wrinkle stability and morphology, we reveal how to control the wrinkle sizes on the micron and sub-micron length scale. Furthermore, as a parameter fundamental to SMPs, we demonstrate that the temperature during the recovery process can also affect the wrinkle characteristics and the secondary structures in the silk network. We find that with increasing SMP programmed strain magnitude, silk wrinkled topographies with increasing wavelengths and amplitudes are achieved. Furthermore, silk wrinkling is found to increase β-sheet content, with spectroscopic analysis suggesting that the effect may be due primarily to tensile (e.g., Poisson effect and high-curvature wrinkle) loading modes in the SF, despite the compressive bulk deformation (uniaxial contraction) used to produce wrinkles. Silk wrinkles fabricated from sufficiently thick films (roughly 250 nm) persist after 24 h in cell culture medium. Using a fibroblast cell line, analysis of cellular response to the wrinkled topographies reveals high viability and attachment. These findings demonstrate use of wrinkled SF films under physiologically relevant conditions and suggest the potential for biopolymer wrinkles on biomaterials surfaces to find application in cell mechanobiology, wound healing, and tissue engineering.
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Affiliation(s)
- Elizabeth Oguntade
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA.
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, NY 13244, USA
| | - Caleb Wigham
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Luiza Owuor
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA.
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, NY 13244, USA
| | - Ujjwal Aryal
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA.
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, NY 13244, USA
| | - Kerrin O'Grady
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA.
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, NY 13244, USA
| | - Anthony Acierto
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA.
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, NY 13244, USA
| | - R Helen Zha
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - James H Henderson
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA.
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, NY 13244, USA
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3
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Kuram E, Karadeli HH. Fabrication of Shape Memory Polymer Endovascular Thrombectomy Device for Treating Ischemic Stroke. Macromol Rapid Commun 2024:e2400146. [PMID: 38704791 DOI: 10.1002/marc.202400146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/28/2024] [Indexed: 05/07/2024]
Abstract
Stroke is the second result for death and ischemic stroke constitutes most of all stroke cases. Ischemic stroke takes place when blood clot or embolus blocks cerebral vessel and interrupts blood flow, which often leads to brain damage, permanent disability, or death. There is a 4.5-h (golden hour) treatment window to restore blood flow prior to permanent neurological impairment results. Current stroke treatments consist mechanical system or thrombolytic drug therapy to disrupt or dissolve thrombus. Promising method for stroke treatment is mechanical retrieving of thrombi employing device deployed endovascularly. Advent of smart materials has led to research fabrication of several minimally invasive endovascular devices that take advantage of new materials capabilities. One of these capabilities is shape memory, is capability of material to store temporary form, then activate to primary shape as subjected to stimuli. Shape memory polymers (SMPs) are employed as good materials for thrombectomy device fabrication. Therefore, current review presents thrombectomy device development and fabrication with SMPs. Design, performance, limitations, and in vitro or in vivo clinical results of SMP-based thrombectomy devices are identified. Review also sheds light on SMP's future outlook and recommendations for thrombectomy device application, opening a new era for advanced materials in materials science.
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Affiliation(s)
- Emel Kuram
- Department of Mechanical Engineering, Gebze Technical University, Kocaeli, 41400, Turkey
| | - Hasan Hüseyin Karadeli
- Department of Neurology, Istanbul Medeniyet University Göztepe Prof. Dr. Süleyman Yalçın City Hospital, Istanbul, 34722, Turkey
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4
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Tian PJ, Han XH, Qi QY, Zhao X. An Azulene-Based Crystalline Porous Covalent Organic Framework for Efficient Photothermal Conversion. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307635. [PMID: 38105336 DOI: 10.1002/smll.202307635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/21/2023] [Indexed: 12/19/2023]
Abstract
The designed synthesis of a crystalline azulene-based covalent organic framework (COF-Azu-TP) is presented and its photothermal property is investigated. Azulene, a distinctive 5-7 fused ring non-benzenoid aromatic compound with a large intramolecular dipole moment and unique photophysical characteristics, is introduced as the key feature in COF-Azu-TP. The incorporation of azulene moiety imparts COF-Azu-TP with broad-spectrum light absorption capability and interlayer dipole interactions, which makes COF-Azu-TP a highly efficient photothermal conversion material. Its polyurethane (PU) composite exhibits a solar-to-vapor conversion efficiency (97.2%) and displays a water evaporation rate (1.43 kg m-2 h-1) under one sun irradiation, even at a very low dosage of COF-Azu-TP (2.2 wt%). Furthermore, COF-Azu-TP is utilized as a filler in a polylactic acid (PLA)/polycaprolactone (PCL) composited shape memory material, enabling rapid shape recovery under laser stimulation. A comparison study with a naphthalene-based COF isomer further emphasizes the crucial role of azulene in enhancing photothermal conversion efficiency. This study demonstrates the significance of incorporating specific building blocks into COFs for the development of functional porous materials with enhanced properties, paving the way for future applications in diverse fields.
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Affiliation(s)
- Peng-Ju Tian
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Xiang-Hao Han
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Qiao-Yan Qi
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Xin Zhao
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
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5
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Mandal A, Chatterjee K. 4D printing for biomedical applications. J Mater Chem B 2024; 12:2985-3005. [PMID: 38436200 DOI: 10.1039/d4tb00006d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
While three-dimensional (3D) printing excels at fabricating static constructs, it fails to emulate the dynamic behavior of native tissues or the temporal programmability desired for medical devices. Four-dimensional (4D) printing is an advanced additive manufacturing technology capable of fabricating constructs that can undergo pre-programmed changes in shape, property, or functionality when exposed to specific stimuli. In this Perspective, we summarize the advances in materials chemistry, 3D printing strategies, and post-printing methodologies that collectively facilitate the realization of temporal dynamics within 4D-printed soft materials (hydrogels, shape-memory polymers, liquid crystalline elastomers), ceramics, and metals. We also discuss and present insights about the diverse biomedical applications of 4D printing, including tissue engineering and regenerative medicine, drug delivery, in vitro models, and medical devices. Finally, we discuss the current challenges and emphasize the importance of an application-driven design approach to enable the clinical translation and widespread adoption of 4D printing.
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Affiliation(s)
- Arkodip Mandal
- Department of Materials Engineering, Indian Institute of Science, Bengaluru, Karnataka 560012, India.
| | - Kaushik Chatterjee
- Department of Materials Engineering, Indian Institute of Science, Bengaluru, Karnataka 560012, India.
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6
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Oguntade E, Fougnier D, Meyer S, O'Grady K, Kudlack A, Henderson JH. Tuning the Topography of Dynamic 3D Scaffolds through Functional Protein Wrinkled Coatings. Polymers (Basel) 2024; 16:609. [PMID: 38475293 DOI: 10.3390/polym16050609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 02/15/2024] [Accepted: 02/21/2024] [Indexed: 03/14/2024] Open
Abstract
Surface wrinkling provides an approach to fabricate micron and sub-micron-level biomaterial topographies that can mimic features of the dynamic, in vivo cell environment and guide cell adhesion, alignment, and differentiation. Most wrinkling research to date has used planar, two-dimensional (2D) substrates, and wrinkling work on three-dimensional (3D) structures has been limited. To enable wrinkle formation on architecturally complex, biomimetic 3D structures, here, we report a simple, low-cost experimental wrinkling approach that combines natural silk fibroin films with a recently developed advanced manufacturing technique for programming strain in complex 3D shape-memory polymer (SMP) scaffolds. By systematically investigating the influence of SMP programmed strain magnitude, silk film thickness, and aqueous media on wrinkle morphology and stability, we reveal how to generate and tune silk wrinkles on the micron and sub-micron scale. We find that increasing SMP programmed strain magnitude increases wavelength and decreases amplitudes of silk wrinkled topographies, while increasing silk film thickness increases wavelength and amplitude. Silk wrinkles persist after 24 h in cell culture medium. Wrinkled topographies demonstrate high cell viability and attachment. These findings suggest the potential for fabricating biomimetic cellular microenvironments that can advance understanding and control of cell-material interactions in engineering tissue constructs.
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Affiliation(s)
- Elizabeth Oguntade
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, NY 13244, USA
| | - Daniel Fougnier
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, NY 13244, USA
| | - Sadie Meyer
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, NY 13244, USA
| | - Kerrin O'Grady
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, NY 13244, USA
| | - Autumn Kudlack
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, NY 13244, USA
| | - James H Henderson
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, NY 13244, USA
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7
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Chen Y, Song X, Wang Y, Huang Y, Wang Y, Zhu C. The effect of Pluronic P123 on shape memory of cross-linked polyurethane/poly(l-lactide) biocomposite. Int J Biol Macromol 2024; 259:128788. [PMID: 38154706 DOI: 10.1016/j.ijbiomac.2023.128788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/02/2023] [Accepted: 12/12/2023] [Indexed: 12/30/2023]
Abstract
Polyurethane (PU) and poly(l-lactide) (PLLA) have attracted increasing attention in the development of shape memory polymers (SMPs) due to their good biocompatibility and degradability. Although Pluronic P123 can be used to tune polymeric surface hydrophilicity, its effect on SM performance is a mystery. In this study, a soluble cross-linked PU is synthesized as the switching phase and combined with PLLA and P123 to construct a hydrothermally responsive SM composite. The water contact angle of PU/PLLA/P123 decreases from 22.7° to 5.1° within 2 min. PU and P123 form the switching group, which enhances the SM behavior of the composite. The shape fixity (Rf) and shape recovery (Rr) of PU/PLLA/P123 are 94.4 % and 98 % in 55 °C water, respectively, and the shape recovery time is only 10 s. P123 plays the role of "turbine" in the SM process. PU/PLLA/P123 exhibits a balance between stiffness and elasticity, and good degradability. Furthermore, PU/PLLA/P123 is also biocompatible and beneficial to cell proliferation and growth. Therefore, it offers an alternative approach to developing hydrothermally responsive SM biocomposites based on P123, PU and PLLA for biomedical applications.
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Affiliation(s)
- Youhua Chen
- School of Chemical Engineering, Changchun University of Technology, China
| | - Xiaofeng Song
- School of Chemical Engineering, Changchun University of Technology, China; Jiangxi Center of Modern Apparel Engineering and Technology, Jiangxi Institute of Fashion Technology, China.
| | - Ying Wang
- School of Chemical Engineering, Changchun University of Technology, China
| | - Yuan Huang
- School of Chemical Engineering, Changchun University of Technology, China
| | - Yanhe Wang
- Jiangxi Center of Modern Apparel Engineering and Technology, Jiangxi Institute of Fashion Technology, China
| | - Chuanming Zhu
- School of Chemical Engineering, Changchun University of Technology, China
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8
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Chen J, Sun S, Macios MM, Oguntade E, Narkar AR, Mather PT, Henderson JH. Thermally and Photothermally Triggered Cytocompatible Triple-Shape-Memory Polymer Based on a Graphene Oxide-Containing Poly(ε-caprolactone) and Acrylate Composite. ACS APPLIED MATERIALS & INTERFACES 2023; 15:50962-50972. [PMID: 37902447 PMCID: PMC10636728 DOI: 10.1021/acsami.3c13584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/17/2023] [Accepted: 10/18/2023] [Indexed: 10/31/2023]
Abstract
Triple-shape-memory polymers (triple-SMPs) are a class of polymers capable of fixing two temporary shapes and recovering sequentially from the first temporary shape to the second temporary shape and, last, to the permanent shape. To accomplish a sequential shape change, a triple-SMP must have two separate shape-fixing mechanisms triggerable by distinct stimuli. Despite the biomedical potential of triple-SMPs, a triple-SMP that with cells present can undergo two different shape changes via two distinct cytocompatible triggers has not previously been demonstrated. Here, we report the design and characterization of a cytocompatible triple-SMP material that responds separately to thermal and light triggers to undergo two distinct shape changes under cytocompatible conditions. Tandem triggering was achieved via a photothermally triggered component, comprising poly(ε-caprolactone) (PCL) fibers with graphene oxide (GO) particles physically attached, embedded in a thermally triggered component, comprising a tert-butyl acrylate-butyl acrylate (tBA-BA) matrix. The material was characterized in terms of thermal properties, surface morphology, shape-memory performance, and cytocompatibility during shape change. Collectively, the results demonstrate cytocompatible triple-shape behavior with a relatively larger thermal shape change (an average of 20.4 ± 4.2% strain recovered for all PCL-containing groups) followed by a smaller photothermal shape change (an average of 3.5 ± 0.8% strain recovered for all PCL-GO-containing groups; samples without GO showed no recovery) with greater than 95% cell viability on the triple-SMP materials, establishing the feasibility of triple-shape memory to be incorporated into biomedical devices and strategies.
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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
| | - Shiyang Sun
- 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
| | - Mark M. Macios
- 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
| | - Elizabeth Oguntade
- 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
| | - Ameya R. Narkar
- 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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9
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Ni C, Chen D, Yin Y, Wen X, Chen X, Yang C, Chen G, Sun Z, Wen J, Jiao Y, Wang C, Wang N, Kong X, Deng S, Shen Y, Xiao R, Jin X, Li J, Kong X, Zhao Q, Xie T. Shape memory polymer with programmable recovery onset. Nature 2023; 622:748-753. [PMID: 37704734 DOI: 10.1038/s41586-023-06520-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 08/07/2023] [Indexed: 09/15/2023]
Abstract
Stimulus-responsive shape-shifting polymers1-3 have shown unique promise in emerging applications, including soft robotics4-7, medical devices8, aerospace structures9 and flexible electronics10. Their externally triggered shape-shifting behaviour offers on-demand controllability essential for many device applications. Ironically, accessing external triggers (for example, heating or light) under realistic scenarios has become the greatest bottleneck in demanding applications such as implantable medical devices8. Certain shape-shifting polymers rely on naturally present stimuli (for example, human body temperature for implantable devices)8 as triggers. Although they forgo the need for external stimulation, the ability to control recovery onset is also lost. Naturally triggered, yet actively controllable, shape-shifting behaviour is highly desirable but these two attributes are conflicting. Here we achieved this goal with a four-dimensional printable shape memory hydrogel that operates via phase separation, with its shape-shifting kinetics dominated by internal mass diffusion rather than by heat transport used for common shape memory polymers8-11. This hydrogel can undergo shape transformation at natural ambient temperature, critically with a recovery onset delay. This delay is programmable by altering the degree of phase separation during device programming, which offers a unique mechanism for shape-shifting control. Our naturally triggered shape memory polymer with a tunable recovery onset markedly lowers the barrier for device implementation.
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Affiliation(s)
- Chujun Ni
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Di Chen
- Ningbo Innovation Center, Zhejiang University, Ningbo, China
| | - Yu Yin
- Department of Chemistry, Zhejiang University, Hangzhou, China
| | - Xin Wen
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Xiaolan Chen
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Chen Yang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Guancong Chen
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Zhuo Sun
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Jihang Wen
- Department of Colorectal Surgery and Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Cancer Center, Zhejiang University, Hangzhou, China
| | - Yurong Jiao
- Department of Colorectal Surgery and Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Cancer Center, Zhejiang University, Hangzhou, China
| | - Chunyang Wang
- Eye Center, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Ning Wang
- Eye Center, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiangxing Kong
- Department of Colorectal Surgery and Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Cancer Center, Zhejiang University, Hangzhou, China
| | - Shihong Deng
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Youqing Shen
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Rui Xiao
- State Key Laboratory of Fluid Power & Mechatronic System, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University, Hangzhou, China
| | - Xiuming Jin
- Eye Center, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Jun Li
- Department of Colorectal Surgery and Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Cancer Center, Zhejiang University, Hangzhou, China
| | - Xueqian Kong
- Department of Chemistry, Zhejiang University, Hangzhou, China
| | - Qian Zhao
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.
| | - Tao Xie
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.
- Ningbo Innovation Center, Zhejiang University, Ningbo, China.
- Department of Colorectal Surgery and Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
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10
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Paunović N, Meyer D, Krivitsky A, Studart AR, Bao Y, Leroux JC. 4D printing of biodegradable elastomers with tailorable thermal response at physiological temperature. J Control Release 2023; 361:417-426. [PMID: 37532144 DOI: 10.1016/j.jconrel.2023.07.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 07/13/2023] [Accepted: 07/30/2023] [Indexed: 08/04/2023]
Abstract
4D printing has a great potential for the manufacturing of soft robotics and medical devices. The alliance of digital light processing (DLP) 3D printing and novel shape-memory photopolymers allows for the fabrication of smart 4D-printed medical devices in high resolution and with tailorable functionalities. However, most of the reported 4D-printed materials are nondegradable, which limits their clinical applications. On the other hand, 4D printing of biodegradable shape-memory elastomers is highly challenging, especially when transition points close to physiological temperature and shape fixation under ambient conditions are required. Here, we report the 4D printing of biodegradable shape-memory elastomers with tailorable transition points covering physiological temperature, by using poly(D,L-lactide-co-trimethylene carbonate) methacrylates at various monomer feed ratios. After the programming step, the high-resolution DLP printed stents preserved their folded shape at room temperature, and showed efficient shape recovery at 37 °C. The materials were cytocompatible and readily degradable under physiological conditions. Furthermore, drug-loaded devices with tuneable release kinetics were realized by DLP-printing with resins containing polymers and levofloxacin or nintedanib. This study offers a new perspective for the development of next-generation 4D-printed medical devices.
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Affiliation(s)
- N Paunović
- Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - D Meyer
- Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - A Krivitsky
- Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - A R Studart
- Complex Materials, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
| | - Y Bao
- Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland.
| | - J-C Leroux
- Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland.
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11
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Du B, Wang X, Xia Y, Wu Y, Wu B, Huang S. Hygroscopic Tunable Multishape Memory Effect in Cellulosic Macromolecular Networks with a Supramolecular Mesophase. ACS Macro Lett 2023:835-840. [PMID: 37294873 DOI: 10.1021/acsmacrolett.3c00239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Tunable multishape memory polymers offer intriguing opportunities for memorizing multiple temporary shapes with tunable transition temperatures from one material composition. However, such multishape memory effects have been exclusively correlated with the thermomechanical behaviors of polymers, significantly limiting their applications in heat-sensitive scenarios. Here we report a nonthermal tunable multishape memory effect in covalently cross-linked cellulosic macromolecular networks, which spontaneously organize into supramolecular mesophases by water evaporation induced self-assembly. The supramolecular mesophase endows the network with a broad, reversible hygromechanical response combined with a unique moisture memory effect at ambient temperature, enabling diverse multishape memory behaviors (dual-, triple-, and quadruple-shape memory) under highly tunable and independent control of relative humidity (RH) alone. Significantly, such a hygroscopic tunable multishape memory effect readily extends the implications of shape memory polymers beyond the conventional thermomechanical regimes with potential advantages for biomedical applications.
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Affiliation(s)
- Boyan Du
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Xiaoyi Wang
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Yuming Xia
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Yongbin Wu
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Binyu Wu
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Siya Huang
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, China
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12
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Slobodinyuk D, Slobodinyuk A, Strelnikov V, Kiselkov D. Simple and Efficient Synthesis of Oligoetherdiamines: Hardeners of Epoxyurethane Oligomers for Obtaining Coatings with Shape Memory Effect. Polymers (Basel) 2023; 15:polym15112450. [PMID: 37299247 DOI: 10.3390/polym15112450] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 06/12/2023] Open
Abstract
In this work, new polymers with a shape memory effect for self-healing coatings based on oligomers with terminal epoxy groups, synthesized from oligotetramethylene oxide dioles of various molecular weights, were developed. For this purpose, a simple and efficient method for the synthesis of oligoetherdiamines with a high yield of the product, close to 94%, was developed. Oligodiol was treated with acrylic acid in the presence of a catalyst, followed by the reaction of the reaction product with aminoethylpiperazine. This synthetic route can easily be upscaled. The resulting products can be used as hardeners for oligomers with terminal epoxy groups synthesized from cyclic and cycloaliphatic diisocyanates. The effect of the molecular weight of newly synthesized diamines on the thermal and mechanical properties of urethane-containing polymers has been studied. Elastomers synthesized from isophorone diisocyanate showed excellent shape fixity and shape recovery ratios of >95% and >94%, respectively.
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Affiliation(s)
- Daria Slobodinyuk
- Institute of Technical Chemistry Ural Branch of the Russian Academy of Sciences, Academic Korolev 3, 614130 Perm, Russia
| | - Alexey Slobodinyuk
- Institute of Technical Chemistry Ural Branch of the Russian Academy of Sciences, Academic Korolev 3, 614130 Perm, Russia
- Department of Chemical Engineering, Perm National Research Polytechnic University, Komsomolsky Prospekt, 29, 614990 Perm, Russia
| | - Vladimir Strelnikov
- Institute of Technical Chemistry Ural Branch of the Russian Academy of Sciences, Academic Korolev 3, 614130 Perm, Russia
| | - Dmitriy Kiselkov
- Institute of Technical Chemistry Ural Branch of the Russian Academy of Sciences, Academic Korolev 3, 614130 Perm, Russia
- Department of Chemical Engineering, Perm National Research Polytechnic University, Komsomolsky Prospekt, 29, 614990 Perm, Russia
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13
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Du X, Du H, Zhao Y. A theoretical model for two‐way bending behavior of bilayer shape memory polymer plate. POLYM ADVAN TECHNOL 2023. [DOI: 10.1002/pat.6031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Affiliation(s)
- Xiaofei Du
- School of Civil Engineering Hebei University of Engineering Handan 056038 People's Republic of China
| | - Haiyang Du
- School of Civil Engineering Hebei University of Engineering Handan 056038 People's Republic of China
- Provincial Mechanics Experimental Teaching Demonstration Center Hebei University of Engineering Handan 056038 People's Republic of China
| | - Yajun Zhao
- School of Civil Engineering Hebei University of Engineering Handan 056038 People's Republic of China
- Provincial Mechanics Experimental Teaching Demonstration Center Hebei University of Engineering Handan 056038 People's Republic of China
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14
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Intravaia JT, Graham T, Kim HS, Nanda HS, Kumbar SG, Nukavarapu SP. Smart Orthopedic Biomaterials and Implants. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2023; 25:100439. [PMID: 36642994 PMCID: PMC9835562 DOI: 10.1016/j.cobme.2022.100439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Musculoskeletal injuries including bone defects continue to present a significant challenge in orthopedic surgery due to suboptimal healing. Bone reconstruction strategies focused on the use of biological grafts and bone graft substitutes in the form of biomaterials-based 3D structures in fracture repair. Recent advances in biomaterials science and engineering have resulted in the creation of intricate 3D bone-mimicking structures that are mechanically stable, biodegradable, and bioactive to support bone regeneration. Current efforts are focused on improving the biomaterial and implant physicochemical properties to promote interactions with the host tissue and osteogenesis. The "smart" biomaterials and their 3D structures are designed to actively interact with stem/progenitor cells and the extracellular matrix (ECM) to influence the local environment towards osteogenesis and de novo tissue formation. This article will summarize such smart biomaterials and the methodologies to apply either internal or external stimuli to control the tissue healing microenvironment. A particular emphasis is also made on the use of smart biomaterials and strategies to create functional bioactive implants for bone defect repair and regeneration.
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Affiliation(s)
| | - Trevon Graham
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA
| | - Hyun S. Kim
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA
| | - Himansu S. Nanda
- Terasaki Institute, University of California, Los Angeles, CA, USA
- Mechanical Engineering, IIITDM, Jabalpur, MP, India
| | - Sangamesh G. Kumbar
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA
- Department of Materials Science & Engineering, University of Connecticut, Storrs, CT, USA
- Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA
| | - Syam P. Nukavarapu
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA
- Department of Materials Science & Engineering, University of Connecticut, Storrs, CT, USA
- Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA
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15
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Jin X, Li X, Liu X, Du L, Su L, Ma Y, Ren S. Simple lignin-based, light-driven shape memory polymers with excellent mechanical properties and wide range of glass transition temperatures. Int J Biol Macromol 2023; 228:528-536. [PMID: 36549626 DOI: 10.1016/j.ijbiomac.2022.12.098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/09/2022] [Accepted: 12/10/2022] [Indexed: 12/24/2022]
Abstract
Lignin is the most abundant biomass source of aromatic hydrocarbons but, at present, is not effectively utilized. The development of simple and efficient methods for producing lignin-based polymers to replace petroleum-based products is an important strategy for promoting environmentally friendly and sustainable materials and controlling carbon emissions. In this work, lignin-based, light-driven shape memory polymers (ELIDs) with improved mechanical properties have been prepared from enzymatic hydrolysis lignin, itaconic acid and 1,12-dodecanediol, without any chemical modification of the lignin. The polymers contain large proportions of lignin (20-40 wt%, designated ELID20 to ELID40) and their mechanical properties are dependent on the lignin content. Maximum tensile strength (46.9 MPa) was achieved with ELID30, maximum elongation at break (93.7 %) was achieved with ELID20 and highest fracture energy (10.75 J cm-3) was achieved with ELID25. These excellent mechanical properties are accompanied by good thermal stability and a wide range of glass transition temperatures (21.2-157.3 °C), supporting a broad range of applications. The shape fixation rate (Rf) and shape recovery rate (Rr) were highest for ELID30 (98.7 % and 97.4 %, respectively). Under 1 sun simulated solar irradiation, ELID20 reached a temperature exceeding the glass transition temperature in 15 s and, under 3 sun simulated solar irradiation, ELID30 reached a temperature of 130 °C and shape recovered in 60 s. The excellent mechanical properties and good light-driven shape memory of ELIDs provide inspiration for the development and utilization of lignin-based polymers.
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Affiliation(s)
- Xin Jin
- Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, PR China; College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, PR China
| | - Xiaowen Li
- College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, PR China
| | - Xuan Liu
- College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, PR China
| | - Liuping Du
- Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, PR China; College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, PR China
| | - Ling Su
- Yantai Vocational College, Yantai City 264670, PR China
| | - Yanli Ma
- Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, PR China; College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, PR China
| | - Shixue Ren
- Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, PR China; College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, PR China.
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16
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Bil M, Jurczyk-Kowalska M, Kopeć K, Heljak M. Study of Correlation between Structure and Shape-Memory Effect/Drug-Release Profile of Polyurethane/Hydroxyapatite Composites for Antibacterial Implants. Polymers (Basel) 2023; 15:polym15040938. [PMID: 36850222 PMCID: PMC9962404 DOI: 10.3390/polym15040938] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/03/2023] [Accepted: 02/09/2023] [Indexed: 02/16/2023] Open
Abstract
The effectiveness of multifunctional composites that combine a shape-memory polyurethane (PU) matrix with hydroxyapatite (HA) as a bioactive agent and antibiotics molecules results from a specific composite structure. In this study, structure-function correlations of PU-based composites consisting of 3, 5, and 10 (wt%) of HA and (5 wt%) of gentamicin sulfate (GeS) as a model drug were investigated. The performed analysis revealed that increasing HA content up to 5 wt% enhanced hydrogen-bonding interaction within the soft segments of the PU. Differential-scanning-calorimetry (DSC) analysis confirmed the semi-crystalline structure of the composites. Hydroxyapatite enhanced thermal stability was confirmed by thermogravimetric analysis (TGA), and the water contact angle evaluated hydrophilicity. The shape-recovery coefficient (Rr) measured in water, decreased from 94% for the PU to 86% for the PU/GeS sample and to 88-91% for the PU/HA/GeS composites. These values were positively correlated with hydrogen-bond interactions evaluated using the Fourier-transform-infrared (FTIR) spectroscopy. Additionally, it was found that the shape-recovery process initiates drug release. After shape recovery, the drug concentration in water was 17 μg/mL for the PU/GeS sample and 33-47 μg/mL for the PU HA GeS composites. Antibacterial properties of developed composites were confirmed by the agar-diffusion test against Escherichia coli and Staphylococcus epidermidis.
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Affiliation(s)
- Monika Bil
- Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, Poleczki 19 Street, 02-822 Warsaw, Poland
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Woloska 141, 02-507 Warsaw, Poland
- Correspondence:
| | - Magdalena Jurczyk-Kowalska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Woloska 141, 02-507 Warsaw, Poland
| | - Kamil Kopeć
- Department of Biotechnology and Bioprocess Engineering, Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645 Warsaw, Poland
| | - Marcin Heljak
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Woloska 141, 02-507 Warsaw, Poland
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17
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Pan B, Park SM, Ying WB, Yoon DK, Lee KJ. Azo-Functionalized Thermoplastic Polyurethane for Light-Driven Shape Memory Materials. Macromol Rapid Commun 2023; 44:e2200650. [PMID: 36350231 DOI: 10.1002/marc.202200650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 10/24/2022] [Indexed: 11/11/2022]
Abstract
Shape memory polymers have great potential in the fields of soft robotics, injectable medical devices, and as essential materials for advanced electronic devices. Herein, light-triggered shape-memory thermoplastic polyurethane (TPU) is reported using azido TPU grafted by the photoswitchable azo compound. The trans-cis transitions of the azobenzene on the side chain of the TPU induce the recoiling of the main chain, leading to shaping memory behavior. Under UV irradiation, cis-azo allows the oriented main chain to recoil to release residual stress and realize light-triggered shape memory behavior. The facile method proposed here for the preparation of azo-functionalized TPU can provide viable opportunities for soft robotics and smart TPU applications.
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Affiliation(s)
- Baohai Pan
- Department of Chemical Engineering and Applied Chemistry, College of Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Soon Mo Park
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Wu Bin Ying
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, P. R. China
| | - Dong Ki Yoon
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Kyung Jin Lee
- Department of Chemical Engineering and Applied Chemistry, College of Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea
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18
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Jung YS, Lee S, Park J, Shin EJ. Synthesis of Novel Shape Memory Thermoplastic Polyurethanes (SMTPUs) from Bio-Based Materials for Application in 3D/4D Printing Filaments. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1072. [PMID: 36770079 PMCID: PMC9921888 DOI: 10.3390/ma16031072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/17/2023] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
Bio-based thermoplastic polyurethanes have attracted increasing attention as advanced shape memory materials. Using the prepolymer method, novel fast-responding shape memory thermoplastic polyurethanes (SMTPUs) were prepared from 100% bio-based polyester polyol, poly-propylene succinate derived from corn oil, diphenyl methane diisocyanate, and bio-based 1,3-propanediol as a chain extender. The morphologies of the SMTPUs were investigated by Fourier transform infrared spectroscopy, atomic force microscopy, and X-ray diffraction, which revealed the interdomain spacing between the hard and soft phases, the degree of phase separation, and the intermixing level between the hard and soft phases. The thermal and mechanical properties of the SMTPUs were also investigated, wherein a high hard segment content imparted unique properties that rendered the SMTPUs suitable for shape memory applications at varying temperatures. More specifically, the SMTPUs exhibited a high level of elastic elongation and good mechanical strength. Following compositional optimization, a tensile strength of 24-27 MPa was achieved, in addition to an elongation at break of 358-552% and a hardness of 84-92 Shore A. Moreover, the bio-based SMTPU exhibited a shape recovery of 100%, thereby indicating its potential for use as an advanced temperature-dependent shape memory material with an excellent shape recoverability.
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Affiliation(s)
- Yang-Sook Jung
- Department of Organic Materials and Polymer Engineering, Dong-A University, Busan 49315, Republic of Korea
- Department of Biofibers and Biomaterials Science, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Sunhee Lee
- Department of Fashion Design, Dong-A University, Busan 49315, Republic of Korea
| | - Jaehyeung Park
- Department of Biofibers and Biomaterials Science, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Eun-Joo Shin
- Department of Organic Materials and Polymer Engineering, Dong-A University, Busan 49315, Republic of Korea
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19
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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] [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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20
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Lu T, Xia B, Chen G. Advances in polymer-based cell encapsulation and its applications in tissue repair. Biotechnol Prog 2023; 39:e3325. [PMID: 36651921 DOI: 10.1002/btpr.3325] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 01/06/2023] [Accepted: 01/11/2023] [Indexed: 01/19/2023]
Abstract
Cell microencapsulation is a more widely accepted area of biological encapsulation. In most cases, it involves fixing cells in polymer scaffolds or semi-permeable hydrogel capsules, providing the environment for protecting cells, allowing the exchange of nutrients and oxygen, and protecting cells against the attack of the host immune system by preventing the entry of antibodies and cytotoxic immune cells. Hydrogel encapsulation provides a three-dimensional (3D) environment similar to that experienced in vivo, so it can maintain normal cellular functions to produce tissues similar to those in vivo. Embedded cells can be genetically modified to release specific therapeutic products directly at the target site, thereby eliminating the side effects of systemic treatments. Cellular microcarriers need to meet many extremely high standards regarding their biocompatibility, cytocompatibility, immunoseparation capacity, transport, mechanical, and chemical properties. In this article, we discuss the biopolymer gels used in tissue engineering applications and the brief introduction of cell encapsulation for therapeutic protein production. Also, we review polymer biomaterials and methods for preparing cell microcarriers for biomedical applications. At the same time, in order to improve the application performance of cell microcarriers in vivo, we also summarize the main limitations and improvement strategies of cell encapsulation. Finally, the main applications of polymer cell microcarriers in regenerative medicine are summarized.
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Affiliation(s)
- Tangfang Lu
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, People's Republic of China
| | - Bin Xia
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Technology and Business University, Chongqing, People's Republic of China
| | - Guobao Chen
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, People's Republic of China
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21
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Park MS, Kim K, Lee YJ, Na JH, Kim SU. Deformable Photonic Crystals Based on Chiral Liquid Crystals with Thermal-Mediative Shape Memory Effect. MATERIALS (BASEL, SWITZERLAND) 2022; 16:35. [PMID: 36614374 PMCID: PMC9821410 DOI: 10.3390/ma16010035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/19/2022] [Accepted: 12/19/2022] [Indexed: 06/17/2023]
Abstract
We propose a deformable photonic crystal that exhibits the thermal-mediative shape memory effect. The chiral liquid crystalline polymeric scaffold, which produces the structural colors from a helical twist of the liquid crystal director, is prepared through phase-stabilization of a reactive mesogen in a small molecular chiral liquid crystal (CLC), polymerization, and removal of the CLC. The prepolymer of polyurethane acrylate (PUA) is then infiltrated in the prepared scaffold and subsequently photo-polymerized to form a CLC-PUA composite film. Upon compression, this film shows the blue shift of the structural color and retains this color-shift as released from compression. As the temperature increases, the color is recovered to a pristine state. The concept proposed in this study will be useful for designing mechanochromic soft materials.
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Affiliation(s)
- Min-Seok Park
- Department of Electrical and Information Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of Korea
| | - Kitae Kim
- Department of Convergence System Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Young-Joo Lee
- Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, PA 19104, USA
| | - Jun-Hee Na
- Department of Convergence System Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Se-Um Kim
- Department of Electrical and Information Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of Korea
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22
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Yu T, Zhu F, Peng X, Chen Z. Acetylated Nanocelluloses Reinforced Shape Memory Epoxy with Enhanced Mechanical Properties and Outstanding Shape Memory Effect. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4129. [PMID: 36500751 PMCID: PMC9735699 DOI: 10.3390/nano12234129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/19/2022] [Accepted: 11/20/2022] [Indexed: 06/17/2023]
Abstract
Shape memory polymers (SMPs) have aroused much attention owing to their large deformation and programmability features. Nevertheless, the unsatisfactory toughness and brittleness of SMPs still restrict their practical intelligent applications, e.g., textiles, flexible electronics, and metamaterials. This study employed nature-derived nanocelluloses (NCs) as the reinforcement to fabricate shape memory epoxy-based nanocomposites (SMEPNs). An acetylation modification approach was further proposed to ameliorate the intrinsic incompatibility between NCs and epoxy matrix. The storage modulus increases, and the shape memory effect (SME) sustains after acetylated nanocelluloses (ANCs) incorporation. The SMEPNs with 0.06 wt.% ANCs loading perform the most exceptional toughness improvement over 42%, along with the enhanced fracture strain, elastic modulus, and ultimate strength. The incorporated nanoscale ANCs effectively impede crack propagation without deterioration of the macromolecular movability, resulting in excellent mechanical properties and SME.
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Affiliation(s)
- Tianyu Yu
- School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Feilong Zhu
- School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Xiongqi Peng
- School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Zixuan Chen
- School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
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23
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Sánchez CP, Jérôme C, Noels L, Vanderbemden P. Review of Thermoresponsive Electroactive and Magnetoactive Shape Memory Polymer Nanocomposites. ACS OMEGA 2022; 7:40701-40723. [PMID: 36406535 PMCID: PMC9670708 DOI: 10.1021/acsomega.2c05930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Electroactive and magnetoactive shape memory polymer nanocomposites (SMCs) are multistimuli-responsive smart materials that are of great interest in many research and industrial fields. In addition to thermoresponsive shape memory polymers, SMCs include nanofillers with suitable electric and/or magnetic properties that allow for alternative and remote methods of shape memory activation. This review discusses the state of the art on these electro- and magnetoactive SMCs and summarizes recently published investigations, together with relevant applications in several fields. Special attention is paid to the shape memory characteristics (shape fixity and shape recovery or recovery force) of these materials, as well as to the magnitude of the electric and magnetic fields required to trigger the shape memory characteristics.
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Affiliation(s)
- Clara Pereira Sánchez
- Department
of Electrical Engineering and Computer Science, University of Liège, Liège 4000, Belgium
| | | | - Ludovic Noels
- Department
of Aerospace and Mechanical Engineering, University of Liège, Liège 4000, Belgium
| | - Philippe Vanderbemden
- Department
of Electrical Engineering and Computer Science, University of Liège, Liège 4000, Belgium
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24
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Design, fabrication and application of self-spiraling pattern-driven 4D-printed actuator. Sci Rep 2022; 12:18874. [PMID: 36344729 PMCID: PMC9640617 DOI: 10.1038/s41598-022-23425-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 10/31/2022] [Indexed: 11/09/2022] Open
Abstract
Self-spiraling actuators are widely found in nature and have high research and actuator-application value in self-lock and self-assembly. Four-dimensional (4D) printing is a new generation additive manufacturing of smart materials and has shown great potential for the fabrication of multi-functional and customized structures. The microarchitecture design of a bilayer actuator could bring flexible and diversified self-spiraling behaviors and more possibilities for practical application by combing 4D printing. This work investigates the stimuli effects of fiber patterns and fabrication parameters on self-spiraling behaviors of the bilayer actuator via both experimental and theoretical methods. This work may potentially provide pattern design guidance for 4D-printed self-spiraling actuators to meet different application requirements.
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25
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Tuncaboylu DC, Wischke C. Opportunities and Challenges of Switchable Materials for Pharmaceutical Use. Pharmaceutics 2022; 14:2331. [PMID: 36365149 PMCID: PMC9696173 DOI: 10.3390/pharmaceutics14112331] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/19/2022] [Accepted: 10/22/2022] [Indexed: 06/27/2024] Open
Abstract
Switchable polymeric materials, which can respond to triggering signals through changes in their properties, have become a major research focus for parenteral controlled delivery systems. They may enable externally induced drug release or delivery that is adaptive to in vivo stimuli. Despite the promise of new functionalities using switchable materials, several of these concepts may need to face challenges associated with clinical use. Accordingly, this review provides an overview of various types of switchable polymers responsive to different types of stimuli and addresses opportunities and challenges that may arise from their application in biomedicine.
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26
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Paunović N, Marbach J, Bao Y, Berger V, Klein K, Schleich S, Coulter FB, Kleger N, Studart AR, Franzen D, Luo Z, Leroux J. Digital Light 3D Printed Bioresorbable and NIR-Responsive Devices with Photothermal and Shape-Memory Functions. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200907. [PMID: 35896948 PMCID: PMC9507367 DOI: 10.1002/advs.202200907] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 06/23/2022] [Indexed: 06/15/2023]
Abstract
Digital light processing (DLP) 3D printing is a promising technique for the rapid manufacturing of customized medical devices with high precision. To be successfully translated to a clinical setting, challenges in the development of suitable photopolymerizable materials have yet to be overcome. Besides biocompatibility, it is often desirable for the printed devices to be biodegradable, elastic, and with a therapeutic function. Here, a multifunctional DLP printed material system based on the composite of gold nanorods and polyester copolymer is reported. The material demonstrates robust near-infrared (NIR) responsiveness, allowing rapid and stable photothermal effect leading to the time-dependent cell death. NIR light-triggerable shape transformation is demonstrated, resulting in a facilitated insertion and expansion of DLP printed stent ex vivo. The proposed strategy opens a promising avenue for the design of multifunctional therapeutic devices based on nanoparticle-polymer composites.
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Affiliation(s)
- Nevena Paunović
- Institute of Pharmaceutical SciencesDepartment of Chemistry and Applied BiosciencesETH ZurichZurich8093Switzerland
| | - Jessica Marbach
- Institute of Pharmaceutical SciencesDepartment of Chemistry and Applied BiosciencesETH ZurichZurich8093Switzerland
| | - Yinyin Bao
- Institute of Pharmaceutical SciencesDepartment of Chemistry and Applied BiosciencesETH ZurichZurich8093Switzerland
| | - Valentine Berger
- Institute of Pharmaceutical SciencesDepartment of Chemistry and Applied BiosciencesETH ZurichZurich8093Switzerland
| | - Karina Klein
- Musculoskeletal Research UnitVetsuisse FacultyUniversity of ZurichZurich8057Switzerland
| | - Sarah Schleich
- Musculoskeletal Research UnitVetsuisse FacultyUniversity of ZurichZurich8057Switzerland
| | | | - Nicole Kleger
- Complex MaterialsDepartment of MaterialsETH ZurichZurich8093Switzerland
| | - André R. Studart
- Complex MaterialsDepartment of MaterialsETH ZurichZurich8093Switzerland
| | - Daniel Franzen
- Department of PulmonologyUniversity Hospital ZurichZurich8006Switzerland
| | - Zhi Luo
- Institute of Pharmaceutical SciencesDepartment of Chemistry and Applied BiosciencesETH ZurichZurich8093Switzerland
- Guangdong Provincial Key Laboratory of Advanced Biomaterials, Department of Biomedical EngineeringSouthern University of Science and TechnologyShenzhen518055P. R. China
| | - Jean‐Christophe Leroux
- Institute of Pharmaceutical SciencesDepartment of Chemistry and Applied BiosciencesETH ZurichZurich8093Switzerland
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Supramolecular Polycaprolactone-Based Polyurethanes with Thermally Activated Shape-Memory Behavior. Polymers (Basel) 2022; 14:polym14173447. [PMID: 36080523 PMCID: PMC9460292 DOI: 10.3390/polym14173447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/16/2022] [Accepted: 08/17/2022] [Indexed: 11/16/2022] Open
Abstract
In this work, using supramolecular polyurethanes theories, two polycaprolactone-based polyurethanes with 2-ureido-4-[1H]-pyrimidinone (UPy) motifs capable of forming quadruple hydrogen bonds were synthetized and characterized, focusing our attention on their capability to show thermally activated shape-memory response. In particular, 1H NMR analyses confirmed the chemical structure of the supramolecular polyurethanes, while DSC showed their totally amorphous morphology. DMTA in tensile mode was used to study their thermally activated shape-memory properties. In our case, the UPy units are the switching domains while the network formed by the segregated hard segments is the permanent domain obtained materials with excellent shape-memory response at both 100 and 85 °C. These materials are promising for multi-responsive materials where bio-based and potentially recyclable polymers with excellent shape-memory properties are needed.
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28
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Recent Developments in Shape Memory Elastomers for Biotechnology Applications. Polymers (Basel) 2022; 14:polym14163276. [PMID: 36015530 PMCID: PMC9415838 DOI: 10.3390/polym14163276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/05/2022] [Accepted: 08/06/2022] [Indexed: 11/20/2022] Open
Abstract
Shape memory elastomers have revolutionised the world since their introduction in the 20th century. The ability to tailor chemical structures to produce a family of materials in wide-ranging forms with versatile properties has propelled them to be ubiquitous. Recent challenges in the end-of-life management of polymeric materials should prompt us to ask, ‘what innovations in polymeric materials can make a strong case for their use as efficient materials?’ The development of smart elastomers that can acquire, convey, or process a stimulus (such as temperature, pressure, electromagnetic field, moisture, and chemical signals) and reply by creating a useful effect, specifically a reversible change in shape, is one such innovation. Here, we present a brief overview of shape memory elastomers (SMEs) and thereafter a review of recent advances in their development. We discuss the complex processing of structure-property relations and how they differ for a range of stimuli-responsive SMEs, self-healing SMEs, thermoplastic SMEs, and antibacterial and antifouling SMEs. Following innovations in SEMs, the SMEs are forecast to have significant potential in biotechnology based on their tailorable physical properties that are suited to a range of different external stimuli.
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29
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Yang R, Liu W, Song N, Li X, Li Z, Luo F, Li J, Tan H. NIR Photothermal-Responsive Shape Memory Polyurethane with Protein-Inspired Aggregated Chymotrypsin-Sensitive Degradable Domains. Macromol Rapid Commun 2022; 43:e2200490. [PMID: 35836315 DOI: 10.1002/marc.202200490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/27/2022] [Indexed: 11/05/2022]
Abstract
Biodegradable shape memory polymers are promising biomaterials for stents used in minimally invasive surgical procedures such as intestinal stents. Herein, a series of biodegradable shape memory polyurethanes (SMPUs) containing a novel phenylalanine-derived chain extender PHP were synthesized. Inspired by the fact that the function of biomacromolecules such as proteins is rich and varied because of the multiple combinations of the amino acid in highly evolved biosystems, we found that the sequence distribution of PHP in SMPU would also have a great influence on the phase structure and degradation behavior, especially the difference of surface morphology caused by degradation. Considering that the transition temperature (Ttrans ) of SMPU we obtained is higher than physiological temperature, oxidized carbon black (OCB) with the ability of photothermal conversion was introduced into SMPU, which can not only endow SMPU with near-infrared response shape recovery characteristics, but also enhance phase separation degree and mechanical properties of them. SMPU/OCB composites show excellent shape memory effect and rapid photothermal response, and they can be degraded by chymotrypsin with an adjustable degradation rate. These SMPU/OCB composites show broad potential for application as intestinal stents. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Ruibo Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Wenkai Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Nijia Song
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, China
| | - Xin Li
- Zhengzhou Research Institute for Abrasives & Grinding Co., Ltd., Zhengzhou, 450001, China
| | - Zhen Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Feng Luo
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Jiehua Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Hong Tan
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
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30
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Pineda-Castillo SA, Stiles AM, Bohnstedt BN, Lee H, Liu Y, Lee CH. Shape Memory Polymer-Based Endovascular Devices: Design Criteria and Future Perspective. Polymers (Basel) 2022; 14:polym14132526. [PMID: 35808573 PMCID: PMC9269599 DOI: 10.3390/polym14132526] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/13/2022] [Accepted: 06/17/2022] [Indexed: 12/12/2022] Open
Abstract
Devices for the endovascular embolization of intracranial aneurysms (ICAs) face limitations related to suboptimal rates of lasting complete occlusion. Incomplete occlusion frequently leads to residual flow within the aneurysm sac, which subsequently causes aneurysm recurrence needing surgical re-operation. An emerging method for improving the rates of complete occlusion both immediately after implant and in the longer run can be the fabrication of patient-specific materials for ICA embolization. Shape memory polymers (SMPs) are materials with great potential for this application, owing to their versatile and tunable shape memory properties that can be tailored to a patient’s aneurysm geometry and flow condition. In this review, we first present the state-of-the-art endovascular devices and their limitations in providing long-term complete occlusion. Then, we present methods for the fabrication of SMPs, the most prominent actuation methods for their shape recovery, and the potential of SMPs as endovascular devices for ICA embolization. Although SMPs are a promising alternative for the patient-specific treatment of ICAs, there are still limitations that need to be addressed for their application as an effective coil-free endovascular therapy.
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Affiliation(s)
- Sergio A. Pineda-Castillo
- Biomechanics and Biomaterials Design Laboratory (BBDL), The University of Oklahoma, Norman, OK 73019, USA; (S.A.P.-C.); (A.M.S.)
- Stephenson School of Biomedical Engineering, The University of Oklahoma, Norman, OK 73019, USA
| | - Aryn M. Stiles
- Biomechanics and Biomaterials Design Laboratory (BBDL), The University of Oklahoma, Norman, OK 73019, USA; (S.A.P.-C.); (A.M.S.)
- School of Aerospace and Mechanical Engineering, The University of Oklahoma, Norman, OK 73019, USA;
| | - Bradley N. Bohnstedt
- Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA;
| | - Hyowon Lee
- Laboratory of Implantable Microsystems Research (LIMR), Weldon School of Biomedical Engineering, Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA;
| | - Yingtao Liu
- School of Aerospace and Mechanical Engineering, The University of Oklahoma, Norman, OK 73019, USA;
| | - Chung-Hao Lee
- Biomechanics and Biomaterials Design Laboratory (BBDL), The University of Oklahoma, Norman, OK 73019, USA; (S.A.P.-C.); (A.M.S.)
- School of Aerospace and Mechanical Engineering, The University of Oklahoma, Norman, OK 73019, USA;
- Correspondence:
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31
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Liu W, Wang A, Yang R, Wu H, Shao S, Chen J, Ma Y, Li Z, Wang Y, He X, Li J, Tan H, Fu Q. Water-Triggered Stiffening of Shape-Memory Polyurethanes Composed of Hard Backbone Dangling PEG Soft Segments. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2201914. [PMID: 35502474 DOI: 10.1002/adma.202201914] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/19/2022] [Indexed: 02/05/2023]
Abstract
Shape-memory polymers (SMPs) induced by heat or water are commonly used candidates for biomedical applications. Shape recovery inevitably leads to a dramatic decrease of Young's modulus due to the enhanced flexibility of polymer chains at the transition temperature. Herein, the principle of phase-transition-induced stiffening of shape-memory metallic alloys (SMAs) is introduced to the design of molecular structures for shape-memory polyurethane (SMPUs), featuring all-hard segments composed of main chains that are attached with poly(ethylene glycol) (PEG) dangling side chains. Different from conventional SMPs, they achieve a soft-to-stiff transition when shape recovers. The stiffening process is driven by water-triggered segmental rearrangement due to the incompatibility between the hard segments and the soft PEG segments. Upon hydration, the extent of microphase separation is enhanced and the hard domains are transformed to a more continuous morphology to realize more effective stress transfer. Meanwhile, such segmental rearrangement facilitates the shape-recovery process in the hydrated state despite the final increased glass transition temperature (Tg ). This work represents a novel paradigm of simultaneously integrating balanced mechanics, shape-memory property, and biocompatibility for SMPUs as materials for minimally invasive surgery such as endoluminal stents.
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Affiliation(s)
- Wenkai Liu
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Med‐X Center of Materials Sichuan University Chengdu 610065 China
| | - Ao Wang
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Med‐X Center of Materials Sichuan University Chengdu 610065 China
| | - Ruibo Yang
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Med‐X Center of Materials Sichuan University Chengdu 610065 China
| | - Hecheng Wu
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Med‐X Center of Materials Sichuan University Chengdu 610065 China
| | - Shuren Shao
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Med‐X Center of Materials Sichuan University Chengdu 610065 China
| | - Jinlin Chen
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Med‐X Center of Materials Sichuan University Chengdu 610065 China
| | - Yan Ma
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Med‐X Center of Materials Sichuan University Chengdu 610065 China
| | - Zhen Li
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Med‐X Center of Materials Sichuan University Chengdu 610065 China
| | - Yanchao Wang
- Department of Neurosurgery West China Hospital Sichuan University Chengdu Sichuan 610000 China
| | - Xueling He
- Laboratory Animal Center of Sichuan University Chengdu 610041 China
| | - Jiehua Li
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Med‐X Center of Materials Sichuan University Chengdu 610065 China
| | - Hong Tan
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Med‐X Center of Materials Sichuan University Chengdu 610065 China
| | - Qiang Fu
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Med‐X Center of Materials Sichuan University Chengdu 610065 China
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32
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Heterogeneous Solid-State Plasticity of a Multi-Functional Metallo-Supramolecular Shape-Memory Polymer towards Arbitrary Shape Programming. Polymers (Basel) 2022; 14:polym14081598. [PMID: 35458348 PMCID: PMC9027464 DOI: 10.3390/polym14081598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [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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33
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Wei J, Qu R, Wang Y, Liu L, Yang J, Xu H, Hu X, Song X. A medicated shape memory composite of grafting tannin/poly(l-lactide). Int J Biol Macromol 2022; 209:1586-1592. [PMID: 35427641 DOI: 10.1016/j.ijbiomac.2022.04.074] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/04/2022] [Accepted: 04/10/2022] [Indexed: 11/05/2022]
Abstract
Establishing drug release from shape memory polymers (SMPs) for biomedical applications will broaden the horizon of SMP applications from commercial medical device to scientific drug delivery system. Therefore, a strategy combining degradable SMP with drug release is put forward. However, there are few reports about the relevance between them so far. In the work, incorporations of three grafting tannins (TA) as switching phase into poly (l-lactide)(PLLA) construct different thermoresponsive SM composites. TA-PCL-COOH/PLLA exhibites good shape fixation (Rf) and recovery rate (Rr) at 55 °C, and its recovery time is 75 s. After loading lipophilic drug, SM capability of medicated TA-PCL-COOH/PLLA enhances, the Rf and Rr are 97.8% and 97.2%, in particular, its recovery time decreases to 32 s. The effect of SM on drug release is explored. After the first round of SM, the drug release accelerates obviously at body temperature; for example, the release amount of drug increases from 46.5% to 66.1% at initial 12 h due to change of microstructure and improvement of wettability. The drug release rate climbs only slightly as the SM round increases.
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Affiliation(s)
- Junge Wei
- School of Chemical Engineering, Changchun University of Technology, China
| | - Rui Qu
- School of Chemical Engineering, Changchun University of Technology, China
| | - Yanhe Wang
- Jiangxi Center of Modern Apparel Engineering and Technology, Jiangxi Institute of Fashion Technology, China
| | - Lei Liu
- School of Chemical Engineering, Changchun University of Technology, China
| | - Jie Yang
- School of Chemical Engineering, Changchun University of Technology, China
| | - Huidi Xu
- School of Chemical Engineering, Changchun University of Technology, China
| | - Xiaohong Hu
- School of Chemical Engineering, Changchun University of Technology, China
| | - Xiaofeng Song
- School of Chemical Engineering, Changchun University of Technology, China.
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34
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Basak S, Bandyopadhyay A. Styrene‐butadiene‐styrene
‐based shape memory polymers: Evolution and the current state of art. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sayan Basak
- Department of Polymer Science & Technology University of Calcutta Kolkata West Bengal India
| | - Abhijit Bandyopadhyay
- Department of Polymer Science & Technology University of Calcutta Kolkata West Bengal India
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35
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Costa DCS, Costa PC, Gomes MC, Chandrakar A, Wieringa PA, Moroni L, Mano JF. Universal Strategy for Designing Shape Memory Hydrogels. ACS MATERIALS LETTERS 2022; 4:701-706. [PMID: 36568348 PMCID: PMC9777886 DOI: 10.1021/acsmaterialslett.2c00107] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Smart polymeric biomaterials have been the focus of many recent biomedical studies, especially those with adaptability to defects and potential to be implanted in the human body. Herein we report a versatile and straightforward method to convert non-thermoresponsive hydrogels into thermoresponsive systems with shape memory ability. As a proof of concept, a thermoresponsive polyurethane mesh was embedded within a methacrylated chitosan (CHTMA), gelatin (GELMA), laminarin (LAMMA) or hyaluronic acid (HAMA) hydrogel network, which afforded hydrogel composites with shape memory ability. With this system, we achieved good to excellent shape fixity ratios (50-90%) and excellent shape recovery ratios (∼100%, almost instantaneously) at body temperature (37 °C). Cytocompatibility tests demonstrated good viability either with cells on top or encapsulated during all shape memory processes. This straightforward approach opens a broad range of possibilities to convey shape memory properties to virtually any synthetic or natural-based hydrogel for several biological and nonbiological applications.
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Affiliation(s)
- Dora C. S. Costa
- Department
of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Patrícia
D. C. Costa
- Department
of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Maria C. Gomes
- Department
of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Amit Chandrakar
- MERLN
Institute for Technology-Inspired Regenerative Medicine, Department
of Complex Tissue Regeneration, Maastricht
University, 6229 ER Maastricht, The Netherlands
| | - Paul A. Wieringa
- MERLN
Institute for Technology-Inspired Regenerative Medicine, Department
of Complex Tissue Regeneration, Maastricht
University, 6229 ER Maastricht, The Netherlands
| | - Lorenzo Moroni
- MERLN
Institute for Technology-Inspired Regenerative Medicine, Department
of Complex Tissue Regeneration, Maastricht
University, 6229 ER Maastricht, The Netherlands
| | - João F. Mano
- Department
of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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36
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Towards enduring autonomous robots via embodied energy. Nature 2022; 602:393-402. [PMID: 35173338 DOI: 10.1038/s41586-021-04138-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 10/14/2021] [Indexed: 11/08/2022]
Abstract
Autonomous robots comprise actuation, energy, sensory and control systems built from materials and structures that are not necessarily designed and integrated for multifunctionality. Yet, animals and other organisms that robots strive to emulate contain highly sophisticated and interconnected systems at all organizational levels, which allow multiple functions to be performed simultaneously. Herein, we examine how system integration and multifunctionality in nature inspires a new paradigm for autonomous robots that we call Embodied Energy. Whereas most untethered robots use batteries to store energy and power their operation, recent advancements in energy-storage techniques enable chemical or electrical energy sources to be embodied directly within the structures and materials used to create robots, rather than requiring separate battery packs. This perspective highlights emerging examples of Embodied Energy in the context of developing autonomous robots.
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37
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Pekdemİr ME. Thermal properties and shape memory behavior of titanium carbide reinforced poly (vinyl chloride) / poly (ԑ-caprolactone) blend nanocomposites. POLYM-PLAST TECH MAT 2022. [DOI: 10.1080/25740881.2021.1976207] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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38
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Lee SH, Song HW, Park HJ, Kwak MK. Surface Adaptable and Adhesion Controllable Dry Adhesive with Shape Memory Polymer. Macromol Rapid Commun 2022; 43:e2200012. [PMID: 35132723 DOI: 10.1002/marc.202200012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 02/01/2022] [Indexed: 11/08/2022]
Abstract
Gecko foot consist of numerous micro/nano hierarchical hairs and exhibit a high adhesion onto various surfaces by the "van der Waals force". The gecko, despite its mighty adhesion, can travel efficiently with a rapid adhesion switching given that the end of hair in the gecko foot is slanted in one direction. Herein, we report a shape memory polymer (SMP)-based switchable dry adhesive (SSA), inspired by gecko foot, having tremendous surface adaptability and adhesion switching capability. The SSA shows not only high adhesion to the various surfaces (approximately 332.8 kPa) but also easy detachment (nearly 3.73 kPa) due to the characteristic of SMP, which can reversibly recover from a deformed shape to its initial shape. On the basis of the novel adhesion switching property, we suggest the SSA-applied advanced glass transfer system as a feasible application. This experiment confirms that an ultra-thin and light glass film is transferred easily and sustainably, and we believe that the SSA might be a breakthrough and a powerful alternative for not only conventional dry adhesive but also the next-level transfer systems. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Sung Ho Lee
- Department of Electrical Electronics and Computer Science, University of Michigan, Ann Arbor, 48109, United States
| | - Hyun Woo Song
- Department of Mechanical Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Han Jun Park
- Department of Mechanical Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Moon Kyu Kwak
- Department of Mechanical Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea
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Abstract
Abstract
Graphene is one of most exceptional type of nanocarbon. It is a two-dimensional, one atom thick, nanosheet of sp2 hybridized carbon atoms. Graphene has been employed as nanofiller for shape memory polymeric nanocomposites due to outstanding electrical conductivity, mechanical strength, flexibility, and thermal stability characteristics. Consequently, graphene nanostructures have been reinforced in the polymer matrices to attain superior structural, physical, and shape recovery properties. This review basically addresses the important class of shape memory polymer (SMP)/graphene nanocomposites. This assessment is revolutionary to portray the scientific development and advancement in the field of polymer and graphene-based shape memory nanocomposites. In SMP/graphene nanocomposites, polymer shape has been fixed at above transition temperature and then converted to memorized shape through desired external stimuli. Presence of graphene has caused fast switching of temporary shape to original shape in polymer/graphene nanocomposites. In this regard, better graphene dispersion, interactions between matrix-nanofiller, and well-matched interface formation leading to high performance stimuli-responsive graphene derived nanocomposites, have been described. Incidentally, the fabrication, properties, actuation ways, and relevance of the SMP/graphene nanocomposite have been discussed here. The potential applications of these materials have been perceived for the aerospace/automotive components, self-healing nanocomposites, textiles, civil engineering, and biomaterials.
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Affiliation(s)
- Ayesha Kausar
- National Center for Physics, Quaid-i-Azam University Campus , Islamabad , Pakistan
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40
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Nanocomposite electrospun fibers of poly(ε-caprolactone)/bioactive glass with shape memory properties. Bioact Mater 2022; 11:230-239. [PMID: 34977428 PMCID: PMC8668438 DOI: 10.1016/j.bioactmat.2021.09.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 02/06/2023] Open
Abstract
Electrospun fibers of shape memory triethoxysilane-terminated poly(epsilon-caprolactone) (PCL-TES) loaded with bioactive glasses (BG) are here presented. Unloaded PCL-TES, as well as PCL/BG nanocomposite fibers, are also considered for comparison. It is proposed that hydrolysis and condensation reactions take place between triethoxysilane groups of the polymer and the silanol groups at the BG particle surface, thus generating additional crosslinking points with respect to those present in the PCL-TES system. The as-spun PCL-TES/BG fibers display excellent shape memory properties, in terms of shape fixity and shape recovery ratios, without the need of a thermal crosslinking treatment. BG particles confer in vitro bioactivity to PCL-based nanocomposite fibers and favor the precipitation of hydroxycarbonate apatite on the fiber surface. Preliminary cytocompatibility tests demonstrate that the addition of BG particles to PCL-based polymer does not inhibit ST-2 cell viability. This novel approach of using bioactive glasses not only for their biological properties, but also for the enhancement of shape memory properties of PCL-based polymers, widens the versatility and suitability of the obtained composite fibers for a huge portfolio of biomedical applications.
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Lei X, Xiong G, Xiao Y, Huang T, Xin X, Xue S, Zhang Q. High temperature shape memory poly(amide-imide)s with strong mechanical robustness. Polym Chem 2022. [DOI: 10.1039/d2py00739h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Shape memory poly(amide-imide)s with strong mechanical robustness, outstanding heat resistance and low water uptake were fabricated.
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Affiliation(s)
- Xingfeng Lei
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
| | - Guo Xiong
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
| | - Yuyang Xiao
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
| | - Tianhao Huang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
| | - Xiangze Xin
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
| | - Shuyu Xue
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
| | - Qiuyu Zhang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China
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Experimental and modeling investigation on thermodynamic effect of graphene doped shape memory epoxy composites. POLYMER 2022. [DOI: 10.1016/j.polymer.2021.124430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Jarrah HR, Zolfagharian A, Bodaghi M. Finite element modeling of shape memory polyurethane foams for treatment of cerebral aneurysms. Biomech Model Mechanobiol 2021; 21:383-399. [PMID: 34907490 PMCID: PMC8807438 DOI: 10.1007/s10237-021-01540-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/24/2021] [Indexed: 11/25/2022]
Abstract
In this paper, a thermo-mechanical analysis of shape memory polyurethane foams (SMPUFs) with aiding of a finite element model (FEM) for treating cerebral aneurysms (CAs) is introduced. Since the deformation of foam cells is extremely difficult to observe experimentally due to their small size, a structural cell-assembly model is established in this work via finite element modeling to examine all-level deformation details. Representative volume elements of random equilateral Kelvin open-cell microstructures are adopted for the cell foam. Also, a user-defined material subroutine (UMAT) is developed based on a thermo-visco-elastic constitutive model for SMPUFs, and implemented in the ABAQUS software package. The model is able to capture thermo-mechanical responses of SMPUFs for a full shape memory thermodynamic cycle. One of the latest treatments of CAs is filling the inside of aneurysms with SMPUFs. The developed FEM is conducted on patient-specific basilar aneurysms treated by SMPUFs. Three sizes of foams are selected for the filling inside of the aneurysm and then governing boundary conditions and loadings are applied to the foams. The results of the distribution of stress and displacement in the absence and presence of the foam are compared. Due to the absence of similar results in the specialized literature, this paper is likely to fill a gap in the state of the art of this problem and provide pertinent results that are instrumental in the design of SMPUFs for treating CAs.
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Affiliation(s)
- H R Jarrah
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - A Zolfagharian
- School of Engineering, Deakin University, Geelong, 3216, Australia
| | - M Bodaghi
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK.
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Zhang Y, Liu K, Liu T, Ni C, Chen D, Guo J, Liu C, Zhou J, Jia Z, Zhao Q, Pan P, Xie T. Differential diffusion driven far-from-equilibrium shape-shifting of hydrogels. Nat Commun 2021; 12:6155. [PMID: 34697306 PMCID: PMC8546058 DOI: 10.1038/s41467-021-26464-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 10/05/2021] [Indexed: 11/09/2022] Open
Abstract
Far-from-equilibrium (FFE) conditions give rise to many unusual phenomena in nature. In contrast, synthetic shape-shifting materials typically rely on monotonic evolution between equilibrium states, limiting inherently the richness of the shape-shifting behaviors. Here we report an unanticipated shape-shifting behavior for a hydrogel that can be programmed to operate FFE-like behavior. During its temperature triggered shape-shifting event, the programmed stress induces uneven water diffusion, which pushes the hydrogel off the equilibrium based natural pathway. The resulting geometric change enhances the diffusion contrast in return, creating a self-amplifying sequence that drives the system into an FFE condition. Consequently, the hydrogel exhibits counterintuitive two opposite shape-shifting events under one single stimulation, at a speed accelerated by more than one order magnitude. Our discovery points to a future direction in creating FFE conditions to access otherwise unattainable shape-shifting behaviors, with potential implications for many engineering applications including soft robotics and medical devices. Synthetic shape-shifting materials typically rely on monotonic evolution between equilibrium states, limiting the shape-shifting behaviours. Here the authors report an unanticipated shape-shifting behaviour for a hydrogel that can be programmed to operate via a far-from-equilibrium mechanism.
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Affiliation(s)
- Yue Zhang
- 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
| | - Kangkang Liu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Tao Liu
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Chujun Ni
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Di Chen
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Jiamei Guo
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Chang Liu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Jian Zhou
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Zheng Jia
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Center for X-Mechanics, Department of Engineering Mechanics, 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.
| | - Pengju Pan
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, 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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Hashimoto K, Kurokawa N, Hotta A. Controlling the switching temperature of biodegradable shape memory polymers composed of stereocomplex polylactide / poly(,-lactide-co-ε-caprolactone) blends. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Pandey PK, Das MK. Effect of foam insertion in aneurysm sac on flow structures in parent lumen: relating vortex structures with disturbed shear. Phys Eng Sci Med 2021; 44:1231-1248. [PMID: 34581959 DOI: 10.1007/s13246-021-01058-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 09/05/2021] [Indexed: 11/26/2022]
Abstract
Numerous studies suggest that disturbed shear, causing endothelium dysfunction, can be related to neighboring vortex structures. With this motivation, this study presents a methodology to characterize the vortex structures. Precisely, we use mapping and characterization of vortex structures' changes to relate it with the hemodynamic indicators of disturbed shear. Topological features of vortex core lines (VCLs) are used to quantify the changes in vortex structures. We use the Sujudi-Haimes algorithm to extract the VCLs from the flow simulation results. The idea of relating vortex structures with disturbed shear is demonstrated for cerebral arteries with aneurysms virtually treated by inserting foam in the sac. To get physiologically realistic flow fields, we simulate blood flow in two patient-specific geometries before and after foam insertion, with realistic velocity waveform imposed at the inlet, using the Carreau-Yasuda model to mimic the shear-thinning behavior. With homogenous porous medium assumption, flow through the foam is modeled using the Forchheimer-Brinkman extended Darcy model. Results show that foam insertion increases the number of VCLs in the parent lumen. The average length of VCL increases by 168.9% and 55.6% in both geometries. For both geometries under consideration, results demonstrate that the region with increased disturbed shear lies in the same arterial segment exhibiting an increase in the number of oblique VCLs. Based on the findings, we conjecture that an increase in oblique VCLs is related to increased disturbed shear at the neighboring portion of the arterial wall.
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Affiliation(s)
- Pawan Kumar Pandey
- Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, Uttar Pradesh, India
| | - Malay Kumar Das
- Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, Uttar Pradesh, India.
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Farahani M, Shafiee A. Wound Healing: From Passive to Smart Dressings. Adv Healthc Mater 2021; 10:e2100477. [PMID: 34174163 DOI: 10.1002/adhm.202100477] [Citation(s) in RCA: 215] [Impact Index Per Article: 71.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 05/06/2021] [Indexed: 12/13/2022]
Abstract
The universal increase in the number of patients with nonhealing skin wounds imposes a huge social and economic burden on the patients and healthcare systems. Although, the application of traditional wound dressings contributes to an effective wound healing outcome, yet, the complexity of the healing process remains a major health challenge. Recent advances in materials and fabrication technologies have led to the fabrication of dressings that provide proper conditions for effective wound healing. The 3D-printed wound dressings, biomolecule-loaded dressings, as well as smart and flexible bandages are among the recent alternatives that have been developed to accelerate wound healing. Additionally, the new generation of wound dressings contains a variety of microelectronic sensors for real-time monitoring of the wound environment and is able to apply required actions to support the healing progress. Moreover, advances in manufacturing flexible microelectronic sensors enable the development of the next generation of wound dressing substrates, known as electronic skin, for real-time monitoring of the whole physiochemical markers in the wound environment in a single platform. The current study reviews the importance of smart wound dressings as an emerging strategy for wound care management and highlights different types of smart dressings for promoting the wound healing process.
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Affiliation(s)
- Mojtaba Farahani
- Department of Biomedical Engineering Amirkabir University of Technology Tehran 1591634311 Iran
| | - Abbas Shafiee
- UQ Diamantina Institute Translational Research Institute The University of Queensland Brisbane QLD 4102 Australia
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Jin L, Wang Y, Ouyang H, Liu Y, Zhu Z, Wang S, Xin H, Wang X. A versatile and low-toxicity material for photothermal therapy in deeper tissues. J Mater Chem B 2021; 9:6155-6162. [PMID: 34318782 DOI: 10.1039/d0tb03000g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The limited depth of the near infrared (NIR) response is one of the major flaws of the present photothermal therapy (PTT). In this article, thermosensitive polyurethane urea (TPUU) was synthesized by polymerization. Subsequent experiments showed that, compared with classical photosensitizers, TPUU has higher photothermal effects and lower cytotoxicity. These valuable properties could make the present PTT research provide more therapeutic options among different tissues and organs. As a practical example, TPUU was applied to regulate the intestinal flora through external NIR irradiation, which implied its promising expanded applications in deeper tissues.
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Affiliation(s)
- Liguo Jin
- College of Chemistry, Nanchang University, Nanchang, Jiangxi 330088, China.
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He Z, Shi Y, Feng X, Li Z, Zhang Y, Dai C, Wang P, Zhao L. Numerical Analysis of Space Deployable Structure Based on Shape Memory Polymers. MICROMACHINES 2021; 12:mi12070833. [PMID: 34357243 PMCID: PMC8304941 DOI: 10.3390/mi12070833] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/15/2021] [Accepted: 07/16/2021] [Indexed: 11/30/2022]
Abstract
Shape memory polymers (SMPs) have been applied in aerospace engineering as deployable space structures. In this work, the coupled finite element method (FEM) was established based on the generalized Maxwell model and the time–temperature equivalence principle (TTEP). The thermodynamic behavior and shape memory effects of a single-arm deployment structure (F-DS) and four-arm deployment structure (F-DS) based on SMPs were analyzed using the coupled FEM. Good consistency was obtained between the experimental data and simulation data for the tensile and S-DS recovery forces, verifying that the coupled FEM can accurately and reliably describe the thermodynamic behavior and shape memory effects of the SMP structure. The step-by-step driving structure is suitable for use as a large-scale deployment structure in space. This coupled FEM provides a new direction for future research on epoxy SMPs.
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Affiliation(s)
- Zepeng He
- Beijing Institute of Technology, School of Aerospace Engineering, Beijing 100081, China
- Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, China; (Y.S.); (X.F.); (Y.Z.)
- Correspondence: (Z.H.); (Z.L.); (P.W.); (L.Z.)
| | - Yang Shi
- Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, China; (Y.S.); (X.F.); (Y.Z.)
- School of Science, Beijing Jiaotong University, Beijing 100044, China;
| | - Xiangchao Feng
- Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, China; (Y.S.); (X.F.); (Y.Z.)
| | - Zhen Li
- Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, China; (Y.S.); (X.F.); (Y.Z.)
- Correspondence: (Z.H.); (Z.L.); (P.W.); (L.Z.)
| | - Yan Zhang
- Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, China; (Y.S.); (X.F.); (Y.Z.)
| | - Chunai Dai
- School of Science, Beijing Jiaotong University, Beijing 100044, China;
| | - Pengfei Wang
- Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, China; (Y.S.); (X.F.); (Y.Z.)
- Correspondence: (Z.H.); (Z.L.); (P.W.); (L.Z.)
| | - Liangyu Zhao
- Beijing Institute of Technology, School of Aerospace Engineering, Beijing 100081, China
- Correspondence: (Z.H.); (Z.L.); (P.W.); (L.Z.)
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50
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Weems AC, Arno MC, Yu W, Huckstepp RTR, Dove AP. 4D polycarbonates via stereolithography as scaffolds for soft tissue repair. Nat Commun 2021; 12:3771. [PMID: 34226548 PMCID: PMC8257657 DOI: 10.1038/s41467-021-23956-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 05/13/2021] [Indexed: 11/13/2022] Open
Abstract
3D printing has emerged as one of the most promising tools to overcome the processing and morphological limitations of traditional tissue engineering scaffold design. However, there is a need for improved minimally invasive, void-filling materials to provide mechanical support, biocompatibility, and surface erosion characteristics to ensure consistent tissue support during the healing process. Herein, soft, elastomeric aliphatic polycarbonate-based materials were designed to undergo photopolymerization into supportive soft tissue engineering scaffolds. The 4D nature of the printed scaffolds is manifested in their shape memory properties, which allows them to fill model soft tissue voids without deforming the surrounding material. In vivo, adipocyte lobules were found to infiltrate the surface-eroding scaffold within 2 months, and neovascularization was observed over the same time. Notably, reduced collagen capsule thickness indicates that these scaffolds are highly promising for adipose tissue engineering and repair. Shape memory scaffolds are needed for minimally invasive tissue repair and void filling. Here the authors report on the development of 4D printed polycarbonate-based scaffolds with surface degradation properties which fill voids without deforming tissue and allow for tissue ingrowth with reduced immune response.
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Affiliation(s)
- Andrew C Weems
- School of Chemistry, University of Birmingham, Birmingham, UK.
| | - Maria C Arno
- School of Chemistry, University of Birmingham, Birmingham, UK
| | - Wei Yu
- School of Chemistry, University of Birmingham, Birmingham, UK
| | | | - Andrew P Dove
- School of Chemistry, University of Birmingham, Birmingham, UK.
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