101
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Xia L, Wang Y, Lu N, Xin Z. Facile fabrication of shape memory composites from naturalEucommiarubber and high density polyethylene. POLYM INT 2017. [DOI: 10.1002/pi.5291] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Lin Xia
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering; Qingdao University of Science and Technology; Qingdao PR China
| | - Yan Wang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering; Qingdao University of Science and Technology; Qingdao PR China
| | - Na Lu
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering; Qingdao University of Science and Technology; Qingdao PR China
| | - Zhenxiang Xin
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering; Qingdao University of Science and Technology; Qingdao PR China
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102
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Rashmi BJ, Loux C, Prashantha K. Bio-based thermoplastic polyurethane and polyamide 11 bioalloys with excellent shape memory behavior. J Appl Polym Sci 2017. [DOI: 10.1002/app.44794] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- B. J. Rashmi
- Mines Douai, Department of Polymers and Composites Technology & Mechanical Engineering; 941 rue Charles Bourseul, CS 10838 Douai Cedex 59508 France
| | - C. Loux
- Mines Douai, Department of Polymers and Composites Technology & Mechanical Engineering; 941 rue Charles Bourseul, CS 10838 Douai Cedex 59508 France
| | - K. Prashantha
- Mines Douai, Department of Polymers and Composites Technology & Mechanical Engineering; 941 rue Charles Bourseul, CS 10838 Douai Cedex 59508 France
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103
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Sonawane VC, More MP, Pandey AP, Patil PO, Deshmukh PK. Fabrication and characterization of shape memory polymers based bioabsorbable biomedical drug eluting stent. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 45:1740-1750. [PMID: 28140661 DOI: 10.1080/21691401.2017.1282867] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Present investigation deals with, tacrolimus eluting, self-expandable, biodegradable stent fabricated by solvent casting method. The design was based on shape memory polymers, which possess the ability to memorize temporary shape that can substantially differ from their initial permanent shape. A set of biodegradable polymers blend was used such as poly-lactic acid (PLA) and poly-l-glycolic acid (PLGA) to study the shape memory effect of polymer. The prepared stent was assessed for various parameters like Scanning Electron Microscopy (SEM), In-vitro and Ex vivo expansion, Drug content, In-vitro drug release, Haemocompatibility, Differential Scanning Calorimetry (DSC), Fourier Transform Infrared spectroscopy (FTIR), and Textural Characterization.
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Affiliation(s)
- Vratika C Sonawane
- a Post Graduate Department of Pharmaceutics , H R Patel Institute of Pharmaceutical Education and Research , Shirpur , Maharashtra , India
| | - Mahesh P More
- a Post Graduate Department of Pharmaceutics , H R Patel Institute of Pharmaceutical Education and Research , Shirpur , Maharashtra , India
| | - Abhijeet P Pandey
- a Post Graduate Department of Pharmaceutics , H R Patel Institute of Pharmaceutical Education and Research , Shirpur , Maharashtra , India
| | - Pravin O Patil
- b Department of Pharmaceutical Chemistry , H R Patel Institute of Pharmaceutical Education and Research , Shirpur , Maharashtra , India
| | - Prashant K Deshmukh
- a Post Graduate Department of Pharmaceutics , H R Patel Institute of Pharmaceutical Education and Research , Shirpur , Maharashtra , India
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104
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Yang G, Liu X, Tok AIY, Lipik V. Body temperature-responsive two-way and moisture-responsive one-way shape memory behaviors of poly(ethylene glycol)-based networks. Polym Chem 2017. [DOI: 10.1039/c7py00786h] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
In this work, crosslinked shape-memory polymer networks were prepared by thermally induced free-radical polymerizations of methacrylate-terminated poly(ethylene glycol) (PEG) and n-butyl acrylate (BA), which integrate thermal-responsive two-way and moisture-responsive one-way shape memory effects (SME).
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Affiliation(s)
- Guang Yang
- Institute for Sports Research
- Nanyang Technological University
- Singapore 639798
- Singapore
- School of Textiles
| | - Xueyang Liu
- Institute for Sports Research
- Nanyang Technological University
- Singapore 639798
- Singapore
| | - Alfred Iing Yoong Tok
- School of Material Science and Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
| | - Vitali Lipik
- School of Material Science and Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
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105
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Lu W, Le X, Zhang J, Huang Y, Chen T. Supramolecular shape memory hydrogels: a new bridge between stimuli-responsive polymers and supramolecular chemistry. Chem Soc Rev 2017; 46:1284-1294. [DOI: 10.1039/c6cs00754f] [Citation(s) in RCA: 308] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This tutorial review summarizes the recent advancement in various reversible crosslinks employed to construct supramolecular shape memory hydrogels (SSMHs) and different shape memory behaviors.
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Affiliation(s)
- Wei Lu
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
| | - Xiaoxia Le
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
| | - Jiawei Zhang
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
| | - Youju Huang
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
| | - Tao Chen
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
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106
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Le X, Lu W, Zheng J, Tong D, Zhao N, Ma C, Xiao H, Zhang J, Huang Y, Chen T. Stretchable supramolecular hydrogels with triple shape memory effect. Chem Sci 2016; 7:6715-6720. [PMID: 28451115 PMCID: PMC5363791 DOI: 10.1039/c6sc02354a] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 07/03/2016] [Indexed: 12/23/2022] Open
Abstract
Shape memory polymers based on reversible supramolecular interactions have invoked growing research interest, but still suffer from limitations such as poor mechanical strength and finite shape memory performance. Here, we present a novel mechanical stretchable supramolecular hydrogel with a triple shape memory effect at the macro/micro scale. The introduction of a double network concept into supramolecular shape memory hydrogels endows them with excellent mechanical properties. The design of two non-interfering supramolecular interaction systems of both dynamic phenylboronic (PBA)-diol ester bonds and the chelation of alginate with Ca2+ endues the hydrogel with outstanding triple shape memory functionalities.
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Affiliation(s)
- Xiaoxia Le
- Division of Polymer and Composite Materials , Ningbo Institute of Material Technology and Engineering , Chinese Academy of Science , Ningbo , 315201 , China . ;
| | - Wei Lu
- Division of Polymer and Composite Materials , Ningbo Institute of Material Technology and Engineering , Chinese Academy of Science , Ningbo , 315201 , China . ;
| | - Jing Zheng
- Division of Polymer and Composite Materials , Ningbo Institute of Material Technology and Engineering , Chinese Academy of Science , Ningbo , 315201 , China . ;
| | - Dingyi Tong
- Division of Polymer and Composite Materials , Ningbo Institute of Material Technology and Engineering , Chinese Academy of Science , Ningbo , 315201 , China . ;
| | - Ning Zhao
- Beijing National Laboratory for Molecular Sciences , Laboratory of Polymer Physics and Chemistry , Institute of Chemistry , Chinese Academy of Sciences , Beijing , 100190 , China
| | - Chunxin Ma
- Division of Polymer and Composite Materials , Ningbo Institute of Material Technology and Engineering , Chinese Academy of Science , Ningbo , 315201 , China . ;
| | - He Xiao
- Division of Polymer and Composite Materials , Ningbo Institute of Material Technology and Engineering , Chinese Academy of Science , Ningbo , 315201 , China . ;
| | - Jiawei Zhang
- Division of Polymer and Composite Materials , Ningbo Institute of Material Technology and Engineering , Chinese Academy of Science , Ningbo , 315201 , China . ;
| | - Youju Huang
- Division of Polymer and Composite Materials , Ningbo Institute of Material Technology and Engineering , Chinese Academy of Science , Ningbo , 315201 , China . ;
| | - Tao Chen
- Division of Polymer and Composite Materials , Ningbo Institute of Material Technology and Engineering , Chinese Academy of Science , Ningbo , 315201 , China . ;
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107
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Biocompatible electrically conductive nanofibers from inorganic-organic shape memory polymers. Colloids Surf B Biointerfaces 2016; 148:557-565. [PMID: 27690245 DOI: 10.1016/j.colsurfb.2016.09.035] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 08/13/2016] [Accepted: 09/23/2016] [Indexed: 01/27/2023]
Abstract
A porous shape memory scaffold with both biomimetic structures and electrical conductivity properties is highly promising for nerve tissue engineering applications. In this study, a new shape memory polyurethane polymer which consists of inorganic polydimethylsiloxane (PDMS) segments with organic poly(ε-caprolactone) (PCL) segments was synthesized. Based on this poly(PCL/PDMS urethane), a series of electrically conductive nanofibers were electrospun by incorporating different amounts of carbon-black. Our results showed that after adding carbon black into nanofibers, the fiber diameters increased from 399±76 to 619±138nm, the crystallinity decreased from 33 to 25% and the resistivity reduced from 3.6 GΩ/mm to 1.8 kΩ/mm. Carbon black did not significantly influence the shape memory properties of the resulting nanofibers, and all the composite nanofibers exhibited decent shape recovery ratios of >90% and shape fixity ratios of >82% even after 5 thermo-mechanical cycles. PC12 cells were cultured on the shape memory nanofibers and the composite scaffolds showed good biocompatibility by promoting cell-cell interactions. Our study demonstrated that the poly(PCL/PDMS urethane)/carbon-black nanofibers with shape memory properties could be potentially used as smart 4-dimensional (4D) scaffolds for nerve tissue regeneration.
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108
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Hasan SM, Easley AD, Monroe MBB, Maitland DJ. Development of siloxane-based amphiphiles as cell stabilizers for porous shape memory polymer systems. J Colloid Interface Sci 2016; 478:334-43. [PMID: 27318013 PMCID: PMC5841088 DOI: 10.1016/j.jcis.2016.06.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 06/08/2016] [Accepted: 06/10/2016] [Indexed: 11/16/2022]
Abstract
HYPOTHESIS Polyurethane foaming surfactants are cell stabilized at the polymer-gas interface during foam blowing to prevent bubble coalescence. Siloxane-based surfactants are typically used to generate a surface tension gradient at the interface. The chemical structure of the hydrophobic and hydrophilic units affects surfactant properties, which can further influence foam morphology. EXPERIMENTS Siloxane-polyethylene glycol (PEG) ether amphiphiles were synthesized in high yield via hydrosilylation to serve as surfactants for shape memory polymer (SMP) foams. Hydrophobic units consisted of trisiloxane and polydimethyl siloxane, and PEG allyl methyl ether (n=8 or 25) was the hydrophilic component. Upon confirming successful synthesis of the surfactants, their surface tension was measured to study their suitability for use in foaming. SMP foams were synthesized using the four surfactants, and the effects of surfactant structure and concentration on foam morphology were evaluated. FINDINGS Spectroscopic data confirmed successful siloxane-PEG coupling. All surfactants had a low surface tension of 20-21mN/m, indicating their ability to reduce interfacial tension. SMP foams were successfully fabricated with tunable cell size and morphology as a function of surfactant type and concentration.
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Affiliation(s)
- Sayyeda M Hasan
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120, United States
| | - Alexandra D Easley
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120, United States
| | - Mary Beth Browning Monroe
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120, United States
| | - Duncan J Maitland
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120, United States.
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109
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Loh XJ. Four-Dimensional (4D) Printing in Consumer Applications. POLYMERS FOR PERSONAL CARE PRODUCTS AND COSMETICS 2016. [DOI: 10.1039/9781782623984-00108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Modern manufacturing primarily utilizes direct assembly techniques, limiting the possibility of error correction or instant modification of a structure. There is a growing need to program physical materials to build themselves. Adaptive materials are programmable physical or biological materials which possess shape changing properties or can be made to have simple logic responses. There are computer programs that allow the design of nano-robots that self-assemble into functional structures for drug delivery applications. There is immense potential in having disorganized fragments form an ordered construct through physical interactions. However, these are only self-assembly at the smallest scale, typically at the nanoscale. The answer to customizable macrostructures is in additive manufacturing, or 3D printing. 3D printing has been around for almost 30 years now and is starting to filter into the public arena. The main challenges are that 3D printers have been too inefficient, inaccessible, and slow. Cost is also a significant factor in the adoption of this technology. 3D printing has the potential to transform and disrupt the manufacturing landscape as well as our lives. 4D printing seeks to use multi-functional materials in 3D printing so that the printed structure has multiple response capabilities and is able to self-assemble at the macroscale. In this chapter, I will analyze the early promise of this technology as well as highlight potential challenges that adopters could face.
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Affiliation(s)
- Xian Jun Loh
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) 2 Fusionopolis Way, Innovis, #08-03 Singapore 138634 Singapore
- Department of Materials Science and Engineering, National University of Singapore Singapore 117574 Singapore
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110
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Jing X, Mi HY, Huang HX, Turng LS. Shape memory thermoplastic polyurethane (TPU)/poly(ε-caprolactone) (PCL) blends as self-knotting sutures. J Mech Behav Biomed Mater 2016; 64:94-103. [PMID: 27490212 DOI: 10.1016/j.jmbbm.2016.07.023] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 07/15/2016] [Accepted: 07/18/2016] [Indexed: 01/09/2023]
Abstract
Thermally responsive shape memory polymers have promising applications in many fields, especially in biomedical areas. In this study, a simple method was purposed to prepare thermoplastic polyurethane (TPU)/poly(ε-caprolactone) (PCL) blends that possess shape memory attributes. TPU and PCL were melt compounded via a twin-screw extruder and injection molded at various ratios. Multiple test methods were used to characterize their shape memory properties and reveal the underling mechanism. The blends containing 25% TPU and 75% PCL possessed the best shape memory properties as indicated by a 98% shape fixing ratio and 90% shape recovery ratio. This was attributed to the hybrid crystalline and amorphous regions of PCL and TPU. We also found that PCL and TPU had good miscibility and that the PCL domain in TPU25% had higher crystallinity than neat PCL. The crystalline region in TPU25% could deform and maintain its temporary shape when stretched, which contributed to its high shape fixing attribute, while the rubbery TPU region assisted in the recovery of the sample upon heating by releasing the deformation energy stored. Moreover, the TPU25% string prepared could knot itself in a hot water bath, indicating a potential for suture applications. Lastly, the 3T3 fibroblast cells cultured on the TPU/PCL blends showed high viability and active substrate-cell interactions.
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Affiliation(s)
- Xin Jing
- Department of Industrial Equipment and Control Engineering South China University of Technology, Guangzhou, China; Wisconsin Institute for Discovery University of Wisconsin, Madison, WI, USA
| | - Hao-Yang Mi
- Department of Industrial Equipment and Control Engineering South China University of Technology, Guangzhou, China; Wisconsin Institute for Discovery University of Wisconsin, Madison, WI, USA
| | - Han-Xiong Huang
- Department of Industrial Equipment and Control Engineering South China University of Technology, Guangzhou, China.
| | - Lih-Sheng Turng
- Wisconsin Institute for Discovery University of Wisconsin, Madison, WI, USA.
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111
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Rodriguez JN, Zhu C, Duoss EB, Wilson TS, Spadaccini CM, Lewicki JP. Shape-morphing composites with designed micro-architectures. Sci Rep 2016; 6:27933. [PMID: 27301435 PMCID: PMC4908431 DOI: 10.1038/srep27933] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 05/26/2016] [Indexed: 11/09/2022] Open
Abstract
Shape memory polymers (SMPs) are attractive materials due to their unique mechanical properties, including high deformation capacity and shape recovery. SMPs are easier to process, lightweight, and inexpensive compared to their metallic counterparts, shape memory alloys. However, SMPs are limited to relatively small form factors due to their low recovery stresses. Lightweight, micro-architected composite SMPs may overcome these size limitations and offer the ability to combine functional properties (e.g., electrical conductivity) with shape memory behavior. Fabrication of 3D SMP thermoset structures via traditional manufacturing methods is challenging, especially for designs that are composed of multiple materials within porous microarchitectures designed for specific shape change strategies, e.g. sequential shape recovery. We report thermoset SMP composite inks containing some materials from renewable resources that can be 3D printed into complex, multi-material architectures that exhibit programmable shape changes with temperature and time. Through addition of fiber-based fillers, we demonstrate printing of electrically conductive SMPs where multiple shape states may induce functional changes in a device and that shape changes can be actuated via heating of printed composites. The ability of SMPs to recover their original shapes will be advantageous for a broad range of applications, including medical, aerospace, and robotic devices.
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Affiliation(s)
- Jennifer N Rodriguez
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California, 94550, USA
| | - Cheng Zhu
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California, 94550, USA
| | - Eric B Duoss
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California, 94550, USA
| | - Thomas S Wilson
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California, 94550, USA
| | | | - James P Lewicki
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California, 94550, USA
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112
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Wierzbicki MA, Bryant J, Miller MW, Keller B, Maitland DJ. Mechanical and in vitro evaluation of an experimental canine patent ductus arteriosus occlusion device. J Mech Behav Biomed Mater 2016; 59:156-167. [PMID: 26766327 PMCID: PMC5821254 DOI: 10.1016/j.jmbbm.2015.12.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 12/10/2015] [Accepted: 12/14/2015] [Indexed: 11/30/2022]
Abstract
Patent ductus arteriosus (PDA) is a congenital cardiovascular malformation in which a fetal connection between the aorta and pulmonary artery remains patent after birth. This defect commonly results in clinical complications, even death, necessitating closure. Surgical ligation is the most common treatment but requires a thoracotomy and is therefore invasive. A minimally invasive option is preferable. A prototype device for PDA occlusion which utilizes shape memory polymer foams has been developed and evaluated using mechanical and in vitro experiments. Removal force and radial pressure measurements show that the prototype device exhibited a lower removal force and radial pressure than a commercially available device. The in vitro experiments conducted within simplified and physiological PDA models showed that the prototype does not migrate out of position into the pulmonary artery at either physiological or elevated pressures in multiple model configurations. While the radial pressure and removal force were lower than commercial devices, the device performed acceptably in the in vitro benchtop experiments warranting further prototype development.
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Affiliation(s)
- Mark A Wierzbicki
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Jesse Bryant
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Matthew W Miller
- Texas Institute for Preclinical Studies, Texas A&M University, College Station, TX, USA
| | - Brandis Keller
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Duncan J Maitland
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA.
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113
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Li H, Gao X, Luo Y. Multi-shape memory polymers achieved by the spatio-assembly of 3D printable thermoplastic building blocks. SOFT MATTER 2016; 12:3226-3233. [PMID: 26924759 DOI: 10.1039/c6sm00185h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Multi-shape memory polymers were prepared by the macroscale spatio-assembly of building blocks in this work. The building blocks were methyl acrylate-co-styrene (MA-co-St) copolymers, which have the St-block-(St-random-MA)-block-St tri-block chain sequence. This design ensures that their transition temperatures can be adjusted over a wide range by varying the composition of the middle block. The two St blocks at the chain ends can generate a crosslink network in the final device to achieve strong bonding force between building blocks and the shape memory capacity. Due to their thermoplastic properties, 3D printing was employed for the spatio-assembly to build devices. This method is capable of introducing many transition phases into one device and preparing complicated shapes via 3D printing. The device can perform a complex action via a series of shape changes. Besides, this method can avoid the difficult programing of a series of temporary shapes. The control of intermediate temporary shapes was realized via programing the shapes and locations of building blocks in the final device.
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Affiliation(s)
- Hongze Li
- The State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, China.
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114
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Affiliation(s)
- Kevin A. Cavicchi
- Department of Polymer Engineering; University of Akron; 250 S Forge St Akron Ohio 44325-0301
| | - Marcos Pantoja
- Department of Polymer Engineering; University of Akron; 250 S Forge St Akron Ohio 44325-0301
| | - Miko Cakmak
- Department of Polymer Engineering; University of Akron; 250 S Forge St Akron Ohio 44325-0301
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115
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Boire TC, Gupta MK, Zachman AL, Lee SH, Balikov DA, Kim K, Bellan LM, Sung HJ. Reprint of: Pendant allyl crosslinking as a tunable shape memory actuator for vascular applications. Acta Biomater 2016; 34:73-83. [PMID: 27018333 DOI: 10.1016/j.actbio.2016.03.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2015] [Revised: 05/08/2015] [Accepted: 06/01/2015] [Indexed: 10/22/2022]
Abstract
Thermo-responsive shape memory polymers (SMPs) can be programmed to fit into small-bore incisions and recover their functional shape upon deployment in the body. This property is of significant interest for developing the next generation of minimally-invasive medical devices. To be used in such applications, SMPs should exhibit adequate mechanical strengths that minimize adverse compliance mismatch-induced host responses (e.g. thrombosis, hyperplasia), be biodegradable, and demonstrate switch-like shape recovery near body temperature with favorable biocompatibility. Combinatorial approaches are essential in optimizing SMP material properties for a particular application. In this study, a new class of thermo-responsive SMPs with pendant, photocrosslinkable allyl groups, x%poly(ε-caprolactone)-co-y%(α-allyl carboxylate ε-caprolactone) (x%PCL-y%ACPCL), are created in a robust, facile manner with readily tunable material properties. Thermomechanical and shape memory properties can be drastically altered through subtle changes in allyl composition. Molecular weight and gel content can also be altered in this combinatorial format to fine-tune material properties. Materials exhibit highly elastic, switch-like shape recovery near 37 °C. Endothelial compatibility is comparable to tissue culture polystyrene (TCPS) and 100%PCL in vitro and vascular compatibility is demonstrated in vivo in a murine model of hindlimb ischemia, indicating promising suitability for vascular applications. STATEMENT OF SIGNIFICANCE With the ongoing thrust to make surgeries minimally-invasive, it is prudent to develop new biomaterials that are highly compatible and effective in this workflow. Thermo-responsive shape memory polymers (SMPs) have great potential for minimally-invasive applications because SMP medical devices (e.g. stents, grafts) can fit into small-bore minimally-invasive surgical devices and recover their functional shape when deployed in the body. To realize their potential, it is imperative to devise combinatorial approaches that enable optimization of mechanical, SM, and cellular responses for a particular application. In this study, a new class of thermo-responsive SMPs is created in a robust, facile manner with readily tunable material properties. Materials exhibit excellent, switch-like shape recovery near body temperature and promising biocompatibility for minimally-invasive vascular applications.
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116
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Zhang Q, Zhang K, Hu G. Smart three-dimensional lightweight structure triggered from a thin composite sheet via 3D printing technique. Sci Rep 2016; 6:22431. [PMID: 26926357 PMCID: PMC4772624 DOI: 10.1038/srep22431] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 02/15/2016] [Indexed: 01/06/2023] Open
Abstract
Complex fabrication process and expensive materials have restricted the development of smart three-dimensional (3D) lightweight structures, which are expected to possess self-shaping, self-folding and self-unfolding performances. Here we present a simple approach to fabricate smart lightweight structures by triggering shape transformation from thin printed composite sheets. The release of the internal strain in printed polymer materials enables the printed composite sheet to keep flat under heating and transform into a designed 3D configuration when cooled down to room temperature. The 3D lightweight structure can be switched between flat and 3D configuration under appropriate thermal stimuli. Our work exploits uniform internal strain in printed materials as a controllable tool to fabricate smart 3D lightweight structures, opening an avenue for possible applications in engineering fields.
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Affiliation(s)
- Quan Zhang
- School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Kai Zhang
- School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Gengkai Hu
- School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China
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117
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Kausar A, Siddiq M. Polyurethane/poly(ethylene-co-ethyl acrylate) and functional carbon black-based hybrids: Physical properties and shape memory behavior. J Appl Polym Sci 2016. [DOI: 10.1002/app.43481] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ayesha Kausar
- Nanosciences Division, National Centre for Physics; Quaid-i-Azam University Campus; Islamabad 44000 Pakistan
| | - Muhammad Siddiq
- Department of Chemistry; Quaid-i-Azam University; Islamabad 45320 Pakistan
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118
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Narayana H, Hu J, Kumar B, Shang S. Constituent analysis of stress memory in semicrystalline polyurethane. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/polb.24000] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Harishkumar Narayana
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University; Kowloon Hong Kong 999077 China
| | - Jinlian Hu
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University; Kowloon Hong Kong 999077 China
| | - Bipin Kumar
- Division of Textiles, Biological & Agricultural Engineering; University of California; Davis California 95616 USA
| | - Songmin Shang
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University; Kowloon Hong Kong 999077 China
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119
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Kim H, Zhu B, Chen H, Adetiba O, Agrawal A, Ajayan P, Jacot JG, Verduzco R. Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites. J Vis Exp 2016:e53688. [PMID: 26889665 PMCID: PMC4781740 DOI: 10.3791/53688] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
LCEs are shape-responsive materials with fully reversible shape change and potential applications in medicine, tissue engineering, artificial muscles, and as soft robots. Here, we demonstrate the preparation of shape-responsive liquid crystal elastomers (LCEs) and LCE nanocomposites along with characterization of their shape-responsiveness, mechanical properties, and microstructure. Two types of LCEs - polysiloxane-based and epoxy-based - are synthesized, aligned, and characterized. Polysiloxane-based LCEs are prepared through two crosslinking steps, the second under an applied load, resulting in monodomain LCEs. Polysiloxane LCE nanocomposites are prepared through the addition of conductive carbon black nanoparticles, both throughout the bulk of the LCE and to the LCE surface. Epoxy-based LCEs are prepared through a reversible esterification reaction. Epoxy-based LCEs are aligned through the application of a uniaxial load at elevated (160 °C) temperatures. Aligned LCEs and LCE nanocomposites are characterized with respect to reversible strain, mechanical stiffness, and liquid crystal ordering using a combination of imaging, two-dimensional X-ray diffraction measurements, differential scanning calorimetry, and dynamic mechanical analysis. LCEs and LCE nanocomposites can be stimulated with heat and/or electrical potential to controllably generate strains in cell culture media, and we demonstrate the application of LCEs as shape-responsive substrates for cell culture using a custom-made apparatus.
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Affiliation(s)
- Hojin Kim
- Chemical and Biomolecular Engineering, Rice University
| | - Bohan Zhu
- Chemical and Biomolecular Engineering, Rice University
| | | | | | | | | | - Jeffrey G Jacot
- Bioengineering, Rice University; Congenital Heart Surgery Services, Texas Children's Hospital
| | - Rafael Verduzco
- Chemical and Biomolecular Engineering, Rice University; Materials Sciences and NanoEngineering, Rice University;
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120
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Spatiotemporal control of cardiac anisotropy using dynamic nanotopographic cues. Biomaterials 2016; 86:1-10. [PMID: 26874887 DOI: 10.1016/j.biomaterials.2016.01.062] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 01/27/2016] [Indexed: 11/21/2022]
Abstract
Coordinated extracellular matrix spatiotemporal reorganization helps regulate cellular differentiation, maturation, and function in vivo, and is therefore vital for the correct formation, maintenance, and healing of complex anatomic structures. In order to evaluate the potential for cultured cells to respond to dynamic changes in their in vitro microenvironment, as they do in vivo, the collective behavior of primary cardiac muscle cells cultured on nanofabricated substrates with controllable anisotropic topographies was studied. A thermally induced shape memory polymer (SMP) was employed to assess the effects of a 90° transition in substrate pattern orientation on the contractile direction and structural organization of cardiomyocyte sheets. Cardiomyocyte sheets cultured on SMPs exhibited anisotropic contractions before shape transition. 48 h after heat-induced shape transition, the direction of cardiomyocyte contraction reoriented significantly and exhibited a bimodal distribution, with peaks at ∼45 and -45° (P < 0.001). Immunocytochemical analysis highlighted the significant structural changes that the cells underwent in response to the shift in underlying topography. The presented results demonstrate that initial anisotropic nanotopographic cues do not permanently determine the organizational fate or contractile properties of cardiomyocytes in culture. Given the importance of surface cues in regulating primary and stem cell development, investigation of such tunable nanotopographies may have important implications for advancing cellular maturation and performance in vitro, as well as improving our understanding of cellular development in response to dynamic biophysical cues.
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121
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Hasan SM, Harmon G, Zhou F, Raymond JE, Gustafson TP, Wilson TS, Maitland DJ. Tungsten-loaded SMP foam nanocomposites with inherent radiopacity and tunable thermo-mechanical properties. POLYM ADVAN TECHNOL 2016; 27:195-203. [PMID: 30034202 PMCID: PMC6052881 DOI: 10.1002/pat.3621] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Shape memory polymer (SMP) foams have been developed for use in neurovascular occlusion applications. These materials are predominantly polyurethanes that are known for their biocompatibility and tunable properties. However, these polymers inherently lack X-ray visibility, which is a significant challenge for their use as implantable materials. Herein, low density, highly porous shape memory polyurethane foams were developed with tungsten nanoparticles dispersed into the foam matrix, at increasing concentrations, to serve as a radiopaque agent. Utilizing X-ray fluoroscopy sufficient visibility of the foams at small geometries was observed. Thermal characterization of the foams indicated altered thermal response and delayed foam actuation with increasing nanoparticle loading (because of restricted network mobility). Mechanical testing indicated decreased toughness and strength for higher loading because of disruption of the SMP matrix. Overall, filler addition imparted x-ray visibility to the SMP foams and allowed for tuned control of the transition temperature and actuation kinetics for the material.
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Affiliation(s)
- Sayyeda M. Hasan
- Department of Biomedical Engineering, 5045 Emerging Technologies Building, Texas A&M University, 3120 TAMU, College Station, TX, 77843-3120, USA
| | - Garrett Harmon
- Department of Biomedical Engineering, 5045 Emerging Technologies Building, Texas A&M University, 3120 TAMU, College Station, TX, 77843-3120, USA
| | - Fang Zhou
- Characterization Facility, College of Science and Engineering, 1-234 Nils Hasselmo Hall, 312, University of Minnesota, Church Street S. E., Minneapolis, MN, 55455, USA
| | - Jeffery E. Raymond
- Texas A&M University, Laboratory for Synthetic-Biologic Interactions, Department of Chemistry, 1031 Chemistry Complex, 3012 TAMU, College Station, TX, 77842, USA
| | - Tiffany P. Gustafson
- Texas A&M University, Laboratory for Synthetic-Biologic Interactions, Department of Chemistry, 1031 Chemistry Complex, 3012 TAMU, College Station, TX, 77842, USA
| | - Thomas S. Wilson
- Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, CA, 94550, USA
| | - Duncan J. Maitland
- Department of Biomedical Engineering, 5045 Emerging Technologies Building, Texas A&M University, 3120 TAMU, College Station, TX, 77843-3120, USA
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122
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Hasan SM, Nash LD, Maitland DJ. Porous shape memory polymers: Design and applications. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/polb.23982] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sayyeda M. Hasan
- Department of Biomedical Engineering; Texas A&M University; 5045 Emerging Technologies Building, 3120 TAMU, College Station Texas 778433120
| | - Landon D. Nash
- Department of Biomedical Engineering; Texas A&M University; 5045 Emerging Technologies Building, 3120 TAMU, College Station Texas 778433120
| | - Duncan J. Maitland
- Department of Biomedical Engineering; Texas A&M University; 5045 Emerging Technologies Building, 3120 TAMU, College Station Texas 778433120
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123
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Lei M, Xu B, Pei Y, Lu H, Fu YQ. Micro-mechanics of nanostructured carbon/shape memory polymer hybrid thin film. SOFT MATTER 2016; 12:106-14. [PMID: 26448555 DOI: 10.1039/c5sm01269d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This paper investigates the mechanics of hybrid shape memory polymer polystrene (PS) based nanocomposites with skeletal structures of CNFs/MWCNTs formed inside. Experimental results showed an increase of glass transition temperature (Tg) with CNF/MWCNT concentrations instead of a decrease of Tg in nanocomposites filled by spherical particles, and an increase in mechanical properties on both macro- and μm-scales. Compared with CNFs, MWCNTs showed a better mechanical enhancement for PS nanocomposites due to their uniform distribution in the nanocomposites. In nanoindentation tests using the Berkovich tips, indentation size effects and pile-up effects appeared obviously for the nanocomposites, but not for pure PS. Experimental results revealed the enhancement mechanisms of CNFs/MWCNTs related to the secondary structures formed by nanofillers, including two aspects, i.e., filler-polymer interfacial connections and geometrical factors of nanofillers. The filler-polymer interfacial connections were strongly dependent on temperature, thus leading to the opposite changing trend of loss tangent with nanofiller concentrations, respectively, at low and high temperature. The geometrical factors of nanofillers were related to testing scales, further leading to the appearance of pile-up effects for nanocomposites in the nanoindentation tests, in which the size of indents was close to the size of the nanofiller skeleton.
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Affiliation(s)
- Ming Lei
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, People's Republic of China. and Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK.
| | - Ben Xu
- Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK.
| | - Yutao Pei
- Faculty of Mathematics and Natural Sciences, Advanced Production Engineering - Engineering and Technology Institute Groningen, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Haibao Lu
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, People's Republic of China.
| | - Yong Qing Fu
- Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK.
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124
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Song Q, Chen H, Zhou S, Zhao K, Wang B, Hu P. Thermo- and pH-sensitive shape memory polyurethane containing carboxyl groups. Polym Chem 2016. [DOI: 10.1039/c5py02010g] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
A type of polyurethane with carboxylic acid, exhibits a thermo-induced triple-shape memory effect and a pH sensitive dual-shape memory effect.
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Affiliation(s)
- Qiuju Song
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Hongmei Chen
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
- Key Laboratory of Advanced Technologies of Materials
| | - Shaobing Zhou
- Key Laboratory of Advanced Technologies of Materials
- Ministry of Education
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu
| | - Keqing Zhao
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Biqing Wang
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Ping Hu
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
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125
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Kumar B, Hu J, Pan N. Smart medical stocking using memory polymer for chronic venous disorders. Biomaterials 2016; 75:174-181. [DOI: 10.1016/j.biomaterials.2015.10.032] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 10/11/2015] [Accepted: 10/14/2015] [Indexed: 12/31/2022]
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126
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127
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Zhuo S, Zhang G, Feng X, Jiang H, Shi J, Liu H, Li H. Multiple shape memory polymers for self-deployable device. RSC Adv 2016. [DOI: 10.1039/c6ra06168k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Three-segments MH copolymers with well-separated glass transition temperatures can subsequently change their shapes in a pre-defined way.
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Affiliation(s)
- Shuyun Zhuo
- School of Chemical Engineering and Environment
- Beijing Institute of Technology
- Beijing
- P. R. China
| | - Gongzheng Zhang
- School of Chemical Engineering and Environment
- Beijing Institute of Technology
- Beijing
- P. R. China
| | - Xianqi Feng
- School of Chemical Engineering and Environment
- Beijing Institute of Technology
- Beijing
- P. R. China
- School of Chemical Engineering and Materials
| | - Haoyang Jiang
- School of Chemical Engineering and Environment
- Beijing Institute of Technology
- Beijing
- P. R. China
| | - Jinli Shi
- School of Chemical Engineering and Environment
- Beijing Institute of Technology
- Beijing
- P. R. China
| | - Huanqing Liu
- School of Chemical Engineering and Environment
- Beijing Institute of Technology
- Beijing
- P. R. China
| | - Huanjun Li
- School of Chemical Engineering and Environment
- Beijing Institute of Technology
- Beijing
- P. R. China
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128
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Xiao H, Lu W, Le X, Ma C, Li Z, Zheng J, Zhang J, Huang Y, Chen T. A multi-responsive hydrogel with a triple shape memory effect based on reversible switches. Chem Commun (Camb) 2016; 52:13292-13295. [DOI: 10.1039/c6cc06813h] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel multi-responsive shape memory hydrogel is described.
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Affiliation(s)
- He Xiao
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
| | - Wei Lu
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
| | - Xiaoxia Le
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
| | - Chunxin Ma
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
| | - Zhaowen Li
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
| | - Jing Zheng
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
| | - Jiawei Zhang
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
| | - Youju Huang
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
| | - Tao Chen
- Ningbo Institute of Material Technology and Engineering
- Key Laboratory of Marine Materials and Related Technologies
- Chinese Academy of Science
- Ningbo
- China
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129
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Gu L, Cui B, Wu QY, Yu H. Bio-based polyurethanes with shape memory behavior at body temperature: effect of different chain extenders. RSC Adv 2016. [DOI: 10.1039/c5ra26308e] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The chain extenders are used to adjust the transition temperatures and shape memory properties of bio-based shape memory polyurethanes.
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Affiliation(s)
- Lin Gu
- Key Laboratory of Marine Materials and Related Technologies
- Key Laboratory of Marine Materials and Protective Technologies of Zhejiang Province
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo 315201
| | - Bin Cui
- Key Laboratory of Marine Materials and Related Technologies
- Key Laboratory of Marine Materials and Protective Technologies of Zhejiang Province
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo 315201
| | - Qing-Yun Wu
- Department of Polymer Science and Engineering
- Faculty of Materials Science and Chemical Engineering
- Ningbo University
- Ningbo 315211
- P. R. China
| | - Haibin Yu
- Key Laboratory of Marine Materials and Related Technologies
- Key Laboratory of Marine Materials and Protective Technologies of Zhejiang Province
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo 315201
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130
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Palma M, Hardy JG, Tadayyon G, Farsari M, Wind SJ, Biggs MJ. Advances in Functional Assemblies for Regenerative Medicine. Adv Healthc Mater 2015; 4:2500-19. [PMID: 26767738 DOI: 10.1002/adhm.201500412] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 08/16/2015] [Indexed: 12/17/2022]
Abstract
The ability to synthesise bioresponsive systems and selectively active biochemistries using polymer-based materials with supramolecular features has led to a surge in research interest directed towards their development as next generation biomaterials for drug delivery, medical device design and tissue engineering.
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Affiliation(s)
- Matteo Palma
- Department of Chemistry & Biochemistry School of Biological and Chemical Sciences; Queen Mary University of London; London E1 4NS UK
| | - John G. Hardy
- Department of Chemistry; Materials Science Institute; Lancaster University; Lancaster LA1 4YB UK
| | - Ghazal Tadayyon
- Centre for Research in Medical Devices (CURAM); National University of Ireland Galway; Newcastle Road Dangan Ireland
| | - Maria Farsari
- Institute of Electronic Structure and Laser; Crete Greece
| | | | - Manus J. Biggs
- Centre for Research in Medical Devices (CURAM); National University of Ireland Galway; Newcastle Road Dangan Ireland
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131
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Sequential Folding using Light-activated Polystyrene Sheet. Sci Rep 2015; 5:16544. [PMID: 26559611 PMCID: PMC4642267 DOI: 10.1038/srep16544] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 10/15/2015] [Indexed: 11/09/2022] Open
Abstract
A pre-strained polystyrene (PS) polymer sheet is deformed when it approaches the glass transition state as a result of light absorption. By controlling the light absorption of the polymer sheet, non-contact sequential folding can be accomplished. Line patterns of different transparencies and shapes are used to control the light absorption. The line pattern shape is closely related to the folding angle and folding start time. The relation between the line pattern design and folding performance was evaluated experimentally to develop a technique for folding PS sheets. The results show that sequential folding of PS sheets can be accomplished by changing the degree of transparency of the line pattern. Using the technique developed in this study, self-folding origami structures with complicated shapes can be designed and manufactured.
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132
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Intraoral Temperature Triggered Shape-Memory Effect and Sealing Capability of A Transpolyisoprene-Based Polymer. Polymers (Basel) 2015. [DOI: 10.3390/polym7111512] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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133
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Hager MD, Bode S, Weber C, Schubert US. Shape memory polymers: Past, present and future developments. Prog Polym Sci 2015. [DOI: 10.1016/j.progpolymsci.2015.04.002] [Citation(s) in RCA: 462] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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134
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Alam J, Khan A, Alam M, Mohan R. Electroactive Shape Memory Property of a Cu-decorated CNT Dispersed PLA/ESO Nanocomposite. MATERIALS 2015; 8:6391-6400. [PMID: 28793570 PMCID: PMC5512920 DOI: 10.3390/ma8095313] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Revised: 08/21/2015] [Accepted: 09/14/2015] [Indexed: 01/08/2023]
Abstract
Shape memory polymer (SMP) nanocomposites with a fast electro-actuation speed were prepared by dispersing Cu-decorated carbon nanotubes (CNTs) (Cu-CNTs, 1 wt %, 2 wt %, and 3 wt %) in a polylactic acid (PLA)/epoxidized soybean oil (ESO) blend matrix. The shape memory effect (SME) induced by an electrical current was investigated by a fold-deploy “U”-shape bending test. In addition, the Cu-CNT dispersed PLA/ESO nanocomposite was characterized by atomic force microscopy (AFM), dynamic mechanical analysis (DMA) and tensile and electrical measurements. The results demonstrated that the SME was dependent on the Cu-CNT content in the nanocomposites. When comparing the SMEs of the nanocomposite specimens with different Cu-CNT contents, the 2 wt % Cu-CNT dispersed system exhibited a shape recovery as high as 98% within 35 s due to its higher electrical conductivity that results from uniform Cu-CNT dispersion. However, the nanocomposites that contained 1 wt % and 3 wt % Cu-CNTs required 75 s and 63 s, respectively, to reach a maximum recovery level. In addition, the specimens exhibited better mechanical properties after the addition of Cu-CNTs.
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Affiliation(s)
- Javed Alam
- King Abdullah Institute for Nanotechnology, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Aslam Khan
- King Abdullah Institute for Nanotechnology, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Manawwer Alam
- Research Center, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Raja Mohan
- School of Engineering and Technology, Jagran Lakecity University, Mugaliyachap, Bhopal 462044, Madhya Pradesh, India.
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135
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Boire TC, Gupta MK, Zachman AL, Lee SH, Balikov DA, Kim K, Bellan LM, Sung HJ. Pendant allyl crosslinking as a tunable shape memory actuator for vascular applications. Acta Biomater 2015; 24:53-63. [PMID: 26072363 PMCID: PMC4560603 DOI: 10.1016/j.actbio.2015.06.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2015] [Revised: 05/08/2015] [Accepted: 06/01/2015] [Indexed: 01/19/2023]
Abstract
Thermo-responsive shape memory polymers (SMPs) can be programmed to fit into small-bore incisions and recover their functional shape upon deployment in the body. This property is of significant interest for developing the next generation of minimally-invasive medical devices. To be used in such applications, SMPs should exhibit adequate mechanical strengths that minimize adverse compliance mismatch-induced host responses (e.g. thrombosis, hyperplasia), be biodegradable, and demonstrate switch-like shape recovery near body temperature with favorable biocompatibility. Combinatorial approaches are essential in optimizing SMP material properties for a particular application. In this study, a new class of thermo-responsive SMPs with pendant, photocrosslinkable allyl groups, x%poly(ε-caprolactone)-co-y%(α-allyl carboxylate ε-caprolactone) (x%PCL-y%ACPCL), are created in a robust, facile manner with readily tunable material properties. Thermomechanical and shape memory properties can be drastically altered through subtle changes in allyl composition. Molecular weight and gel content can also be altered in this combinatorial format to fine-tune material properties. Materials exhibit highly elastic, switch-like shape recovery near 37°C. Endothelial compatibility is comparable to tissue culture polystyrene (TCPS) and 100%PCL in vitro and vascular compatibility is demonstrated in vivo in a murine model of hindlimb ischemia, indicating promising suitability for vascular applications. STATEMENT OF SIGNIFICANCE With the ongoing thrust to make surgeries minimally-invasive, it is prudent to develop new biomaterials that are highly compatible and effective in this workflow. Thermo-responsive shape memory polymers (SMPs) have great potential for minimally-invasive applications because SMP medical devices (e.g. stents, grafts) can fit into small-bore minimally-invasive surgical devices and recover their functional shape when deployed in the body. To realize their potential, it is imperative to devise combinatorial approaches that enable optimization of mechanical, SM, and cellular responses for a particular application. In this study, a new class of thermo-responsive SMPs is created in a robust, facile manner with readily tunable material properties. Materials exhibit excellent, switch-like shape recovery near body temperature and promising biocompatibility for minimally-invasive vascular applications.
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Affiliation(s)
- Timothy C Boire
- † Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, United States
| | - Mukesh K Gupta
- † Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, United States
| | - Angela L Zachman
- † Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, United States
| | - Sue Hyun Lee
- † Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, United States
| | - Daniel A Balikov
- † Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, United States
| | - Kwangho Kim
- Institute of Chemical Biology, Nashville, TN, 37235, United States
| | - Leon M Bellan
- † Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, United States
- Department of Mechanical Engineering, Vanderbilt University, Nashville, TN, 37235, United States
| | - Hak-Joon Sung
- † Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, United States
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136
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Yan W, Fang L, Heuchel M, Kratz K, Lendlein A. Modeling of stress relaxation of a semi-crystalline multiblock copolymer and its deformation behavior. Clin Hemorheol Microcirc 2015; 60:109-20. [DOI: 10.3233/ch-151940] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Wan Yan
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz Zentrum Geesthacht, Teltow, Germany
- Institute of Chemistry, University of Potsdam, Potsdam, Germany
| | - Liang Fang
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz Zentrum Geesthacht, Teltow, Germany
| | - Matthias Heuchel
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz Zentrum Geesthacht, Teltow, Germany
| | - Karl Kratz
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz Zentrum Geesthacht, Teltow, Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz Zentrum Geesthacht, Teltow, Germany
- Institute of Chemistry, University of Potsdam, Potsdam, Germany
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137
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Dong Y, Fu Y, Ni QQ. In-situgrown silica/water-borne epoxy shape memory composite foams prepared without blowing agent addition. J Appl Polym Sci 2015. [DOI: 10.1002/app.42599] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yubing Dong
- Department of Functional Machinery and Mechanics; Faculty of Textile Science and Technology, Shinshu University; 3-15-1 Tokida Ueda 386-8576 Japan
| | - Yaqin Fu
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education, Zhejiang Sci-Tech University; Hangzhou Zhejiang 310018 China
| | - Qing-Qing Ni
- Department of Functional Machinery and Mechanics; Faculty of Textile Science and Technology, Shinshu University; 3-15-1 Tokida Ueda 386-8576 Japan
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education, Zhejiang Sci-Tech University; Hangzhou Zhejiang 310018 China
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138
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Hearon K, Wierzbicki MA, Nash LD, Landsman TL, Laramy C, Lonnecker AT, Gibbons MC, Ur S, Cardinal KO, Wilson TS, Wooley KL, Maitland DJ. A Processable Shape Memory Polymer System for Biomedical Applications. Adv Healthc Mater 2015; 4:1386-98. [PMID: 25925212 DOI: 10.1002/adhm.201500156] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 03/31/2015] [Indexed: 11/10/2022]
Abstract
Polyurethane shape memory polymers (SMPs) with tunable thermomechanical properties and advanced processing capabilities are synthesized, characterized, and implemented in the design of a microactuator medical device prototype. The ability to manipulate glass transition temperature (Tg ) and crosslink density in low-molecular weight aliphatic thermoplastic polyurethane SMPs is demonstrated using a synthetic approach that employs UV catalyzed thiol-ene "click" reactions to achieve postpolymerization crosslinking. Polyurethanes containing varying C=C functionalization are synthesized, solution blended with polythiol crosslinking agents and photoinitiator and subjected to UV irradiation, and the effects of number of synthetic parameters on crosslink density are reported. Thermomechanical properties are highly tunable, including glass transitions tailorable between 30 and 105 °C and rubbery moduli tailorable between 0.4 and 20 MPa. This new SMP system exhibits high toughness for many formulations, especially in the case of low crosslink density materials, for which toughness exceeds 90 MJ m(-3) at select straining temperatures. To demonstrate the advanced processing capability and synthetic versatility of this new SMP system, a laser-actuated SMP microgripper device for minimally invasive delivery of endovascular devices is fabricated, shown to exhibit an average gripping force of 1.43 ± 0.37 N and successfully deployed in an in vitro experimental setup under simulated physiological conditions.
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Affiliation(s)
- Keith Hearon
- 5045 Emerging Technologies Building; Department of Biomedical Engineering; 3120 Texas A&M University; College Station TX 77843-3120 USA
| | - Mark A. Wierzbicki
- 5045 Emerging Technologies Building; Department of Biomedical Engineering; 3120 Texas A&M University; College Station TX 77843-3120 USA
| | - Landon D. Nash
- 5045 Emerging Technologies Building; Department of Biomedical Engineering; 3120 Texas A&M University; College Station TX 77843-3120 USA
| | - Todd L. Landsman
- 5045 Emerging Technologies Building; Department of Biomedical Engineering; 3120 Texas A&M University; College Station TX 77843-3120 USA
| | - Christine Laramy
- 5045 Emerging Technologies Building; Department of Biomedical Engineering; 3120 Texas A&M University; College Station TX 77843-3120 USA
| | - Alexander T. Lonnecker
- Department of Chemistry; Texas A&M University; P.O. Box 30012 College Station TX 77842-3012 USA
| | - Michael C. Gibbons
- Building 13, Room 263, Biomedical and General Engineering Department; California Polytechnic State University; San Luis Obispo CA 93407 USA
| | - Sarah Ur
- Building 13, Room 263, Biomedical and General Engineering Department; California Polytechnic State University; San Luis Obispo CA 93407 USA
| | - Kristen O. Cardinal
- Building 13, Room 263, Biomedical and General Engineering Department; California Polytechnic State University; San Luis Obispo CA 93407 USA
| | - Thomas S. Wilson
- 7000 East Avenue; Lawrence Livermore National Laboratory; Livermore CA 94550 USA
| | - Karen L. Wooley
- Department of Chemistry; Texas A&M University; P.O. Box 30012 College Station TX 77842-3012 USA
| | - Duncan J. Maitland
- 5045 Emerging Technologies Building; Department of Biomedical Engineering; 3120 Texas A&M University; College Station TX 77843-3120 USA
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139
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Li G, Yan Q, Xia H, Zhao Y. Therapeutic-Ultrasound-Triggered Shape Memory of a Melamine-Enhanced Poly(vinyl alcohol) Physical Hydrogel. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12067-73. [PMID: 25985115 DOI: 10.1021/acsami.5b02234] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Therapeutic-ultrasound-triggered shape memory was demonstrated for the first time with a melamine-enhanced poly(vinyl alcohol) (PVA) physical hydrogel. The addition of a small amount of melamine (up to 1.5 wt %) in PVA results in a strong hydrogel due to the multiple H-bonding between the two constituents. A temporary shape of the hydrogel can be obtained by deformation of the hydrogel (∼65 wt % water) at room temperature, followed by fixation of the deformation by freezing/thawing the hydrogel under strain, which induces crystallization of PVA. We show that the ultrasound delivered by a commercially available device designed for the patient's pain relief could trigger the shape recovery process as a result of ultrasound-induced local heating in the hydrogel that melts the crystallized PVA cross-linking. This hydrogel is thus interesting for potential applications because it combines many desirable properties, being mechanically strong, biocompatible, and self-healable and displaying the shape memory capability triggered by a physiological stimulus.
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Affiliation(s)
- Guo Li
- †Département de chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
- ‡State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Qiang Yan
- †Département de chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Hesheng Xia
- ‡State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Yue Zhao
- †Département de chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
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140
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Zhang F, Zhou T, Liu Y, Leng J. Microwave synthesis and actuation of shape memory polycaprolactone foams with high speed. Sci Rep 2015; 5:11152. [PMID: 26053586 PMCID: PMC4459203 DOI: 10.1038/srep11152] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 05/15/2015] [Indexed: 11/09/2022] Open
Abstract
Microwave technology is a highly effective approach to fast and uniform heating. This article investigates that the microwave heating as a novel method is used to rapidly foam and actuate biocompatible and biodegradable shape memory crosslinked-polycaprolactone (c-PCL) foams. The optical microscope proves that the resulting c-PCL foams have homogenous pore structure. Mechanical behavior and shape memory performance of c-PCL foams are investigated by static materials testing. Shape recovery ratio is approximately 100% and the whole recovery process takes only 98 s when trigged by microwave. Due to the unique principle of microwave heating, the recovery speed of c-PCL foams in microwave oven is several times faster than that in hot water and electric oven. Hence compared to the traditional heating methods, microwave is expected to bring more advantages to modern industry and scientific research in the field of smart materials and structures.
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Affiliation(s)
- Fenghua Zhang
- Centre for Composite Materials and Structures, Harbin Institute of Technology (HIT), Harbin 150080, P. R. China
| | - Tianyang Zhou
- Centre for Composite Materials and Structures, Harbin Institute of Technology (HIT), Harbin 150080, P. R. China
| | - Yanju Liu
- Department of Astronautical Science and Mechanics, Harbin Institute of Technology (HIT), Harbin 150001, P. R. China
| | - Jinsong Leng
- Centre for Composite Materials and Structures, Harbin Institute of Technology (HIT), Harbin 150080, P. R. China
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141
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142
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Yang Y, Mo F, Chen Y, Liu Y, Chen S, Zuo J. Preparation of 2-(dimethylamino) ethyl methacrylate copolymer micelles for shape memory materials. J Appl Polym Sci 2015. [DOI: 10.1002/app.42312] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yan Yang
- Shenzhen Key Laboratory of Special Functional Materials, Nanshan District Key Lab for Biopolymers and Safety Evaluation, College of Materials Science and Engineering, Shenzhen University; Shenzhen 518060 China
| | - Funian Mo
- Shenzhen Key Laboratory of Special Functional Materials, Nanshan District Key Lab for Biopolymers and Safety Evaluation, College of Materials Science and Engineering, Shenzhen University; Shenzhen 518060 China
| | - Yangyang Chen
- Shenzhen Key Laboratory of Special Functional Materials, Nanshan District Key Lab for Biopolymers and Safety Evaluation, College of Materials Science and Engineering, Shenzhen University; Shenzhen 518060 China
| | - Yingyi Liu
- Shenzhen Key Laboratory of Special Functional Materials, Nanshan District Key Lab for Biopolymers and Safety Evaluation, College of Materials Science and Engineering, Shenzhen University; Shenzhen 518060 China
| | - Shaojun Chen
- Shenzhen Key Laboratory of Special Functional Materials, Nanshan District Key Lab for Biopolymers and Safety Evaluation, College of Materials Science and Engineering, Shenzhen University; Shenzhen 518060 China
| | - Jiandong Zuo
- Shenzhen Key Laboratory of Special Functional Materials, Nanshan District Key Lab for Biopolymers and Safety Evaluation, College of Materials Science and Engineering, Shenzhen University; Shenzhen 518060 China
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143
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Affiliation(s)
- Jinlian Hu
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University; Hung Hom, Kowloon Hong Kong 999077 China
| | - Bipin Kumar
- Dr. Bipin Kumar; Division of Textiles; Biological & Agricultural Engineering; The University of California; Davis California 95618
| | - Harishkumar Narayana
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University; Hung Hom, Kowloon Hong Kong 999077 China
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144
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Polymeric materials as artificial muscles: an overview. J Appl Biomater Funct Mater 2015; 13:1-9. [PMID: 24700263 DOI: 10.5301/jabfm.5000184] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/04/2013] [Indexed: 01/08/2023] Open
Abstract
PURPOSE The accurate selection of materials and the fine tuning of their properties represent a fundamental aspect in the realization of new active systems able to produce actuating forces, such as artificial muscles. In this regard, exciting opportunities for the design of new advanced systems are offered by materials belonging to the emerging class of functional polymers: exploiting their actuation response, specific devices can be realized. Along this direction, materials showing either shape-memory effect (SME) or shape-change effect (SCE) have been the subject of extensive studies aimed at designing of actuators as artificial muscles. Here, we concisely review active polymers in terms of properties and main applications in artificial muscle design. STRUCTURE The main aspects related to material properties in both shape-memory polymers (SMPs) and electroactive polymers (EAPs) are reviewed, based on recent scientific literature. SME in thermally activated SMPs is presented by preliminarily providing a definition that encompasses the new theories regarding their fundamental properties. EAPs are briefly presented, describing the working mechanisms and highlighting the main properties and drawbacks, in view of their application as actuators. For both classes of materials, some key examples of effective application in artificial muscles are offered. OUTLOOK The potential in polymer architecture design for the fabrication of actively moving systems is described to give a perspective on the main achievements and new research activities.
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145
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Meng H, Zheng J, Wen X, Cai Z, Zhang J, Chen T. pH- and Sugar-Induced Shape Memory Hydrogel Based on Reversible Phenylboronic Acid-Diol Ester Bonds. Macromol Rapid Commun 2015; 36:533-7. [DOI: 10.1002/marc.201400648] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Revised: 01/06/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Hao Meng
- School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510641 China
- Division of Polymer and Composite Materials; Ningbo Institute of Material Technology and Engineering; Chinese Academy of Science; Ningbo 315201 China
| | - Jing Zheng
- Division of Polymer and Composite Materials; Ningbo Institute of Material Technology and Engineering; Chinese Academy of Science; Ningbo 315201 China
| | - Xiufang Wen
- School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510641 China
| | - Zhiqi Cai
- Shaoguan Institute; Jinan University; Shaoguan 512000 China
| | - Jiawei Zhang
- Division of Polymer and Composite Materials; Ningbo Institute of Material Technology and Engineering; Chinese Academy of Science; Ningbo 315201 China
| | - Tao Chen
- Division of Polymer and Composite Materials; Ningbo Institute of Material Technology and Engineering; Chinese Academy of Science; Ningbo 315201 China
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146
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Yu YJ, Infanger S, Grunlan MA, Maitland DJ. Silicone Membranes to Inhibit Water Uptake into Thermoset Polyurethane Shape-Memory Polymer Conductive Composites. J Appl Polym Sci 2015; 132:10.1002/app.41226. [PMID: 25663711 PMCID: PMC4317729 DOI: 10.1002/app.41226] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Electroactive shape memory polymer (SMP) composites capable of shape actuation via resistive heating are of interest for various biomedical applications. However, water uptake into SMPs will produce a depression of the glass transition temperature (Tg ) resulting in shape recovery in vivo. While water actuated shape recovery may be useful, it is foreseen to be undesirable during early periods of surgical placement into the body. Silicone membranes have been previously reported to prevent release of conductive filler from an electroactive polymer composite in vivo. In this study, a silicone membrane was used to inhibit water uptake into a thermoset SMP composite containing conductive filler. Thermoset polyurethane (PU) SMPs were loaded with either 5 wt% carbon black (CB) or 5 wt% carbon nanotubes (CNT) and subsequently coated with either an Al2O3- or silica-filled silicone membrane. It was observed that the silicone membranes, particularly the silica-filled membrane, reduced the rate of water absorption (37 °C) and subsequent Tg depression versus uncoated composites. In turn, this led to a reduction in the rate of recovery of the permanent shape when exposed to water at 37 °C.
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Affiliation(s)
- Ya-Jen Yu
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Stephen Infanger
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Melissa A. Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Duncan J. Maitland
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
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147
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Zhang T, Wen Z, Hui Y, Yang M, Yang K, Zhou Q, Wang Y. Facile fabrication of a well-defined poly(p-dioxanone) dynamic network from metallosupramolecular interactions to obtain an excellent shape-memory effect. Polym Chem 2015. [DOI: 10.1039/c5py00507h] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel poly(p-dioxanone) dynamic network was fabricated from metallosupramolecular interactions via an elaborate synthetic strategy which shows excellent shape-memory performance.
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Affiliation(s)
- Tianhao Zhang
- Center for Degradable and Flame-Retardant Polymeric Materials (ERCEPM-MOE)
- National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan)
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610064
| | - Zhibin Wen
- Center for Degradable and Flame-Retardant Polymeric Materials (ERCEPM-MOE)
- National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan)
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610064
| | - Yan Hui
- Center for Degradable and Flame-Retardant Polymeric Materials (ERCEPM-MOE)
- National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan)
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610064
| | - Mengnan Yang
- Center for Degradable and Flame-Retardant Polymeric Materials (ERCEPM-MOE)
- National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan)
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610064
| | - Keke Yang
- Center for Degradable and Flame-Retardant Polymeric Materials (ERCEPM-MOE)
- National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan)
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610064
| | - Qian Zhou
- Center for Degradable and Flame-Retardant Polymeric Materials (ERCEPM-MOE)
- National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan)
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610064
| | - Yuzhong Wang
- Center for Degradable and Flame-Retardant Polymeric Materials (ERCEPM-MOE)
- National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan)
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610064
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148
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Wang S, Zhong S, Lim CT, Nie H. Effects of fiber alignment on stem cells–fibrous scaffold interactions. J Mater Chem B 2015; 3:3358-3366. [DOI: 10.1039/c5tb00026b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fiber alignment-induced enhancement of cell adhesion and scaffold remodelling, and alignment of secreted ECM in differentiation.
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Affiliation(s)
- Shuo Wang
- Department of Biomedical Engineering
- College of Biology
- Hunan University
- Changsha 410082
- China
| | - Shaoping Zhong
- Department of Biomedical Engineering
- Faculty of Engineering
- National University of Singapore
- Singapore 117575
| | - Chwee Teck Lim
- Department of Biomedical Engineering
- Faculty of Engineering
- National University of Singapore
- Singapore 117575
| | - Hemin Nie
- Department of Biomedical Engineering
- College of Biology
- Hunan University
- Changsha 410082
- China
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149
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Song JJ, Chang HH, Naguib HE. Design and characterization of biocompatible shape memory polymer (SMP) blend foams with a dynamic porous structure. POLYMER 2015. [DOI: 10.1016/j.polymer.2014.09.062] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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150
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Wu CH, Shau SM, Liu SC, Dai SA, Chen SC, Lee RH, Hsieh CF, Jeng RJ. Enhanced shape memory performance of polyurethanes via the incorporation of organic or inorganic networks. RSC Adv 2015. [DOI: 10.1039/c4ra14277b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
A diol compound with a reactive azetidine-2,4-dione group was prepared and introduced as a side chain moiety of poly(ε-caprolactone) (PCL) based polyurethane (PU).
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Affiliation(s)
- Chien-Hsin Wu
- Institute of Polymer Science and Engineering
- National Taiwan University
- Taipei 106
- Taiwan
| | - Shi-Min Shau
- Department of Chemical Engineering
- National Chung Hsing University
- Taichung 402
- Taiwan
| | - Shin-Chih Liu
- Department of Chemical Engineering
- National Chung Hsing University
- Taichung 402
- Taiwan
| | - Shenghong A. Dai
- Department of Chemical Engineering
- National Chung Hsing University
- Taichung 402
- Taiwan
| | - Su-Chen Chen
- Department of Energy and Materials Technology
- Hsiuping University of Science and Technology
- Taichung 412
- Taiwan
| | - Rong-Ho Lee
- Department of Chemical Engineering
- National Chung Hsing University
- Taichung 402
- Taiwan
| | - Chi-Fa Hsieh
- Chung-Shan Institute of Technology
- Taoyuan 325
- Taiwan
| | - Ru-Jong Jeng
- Institute of Polymer Science and Engineering
- National Taiwan University
- Taipei 106
- Taiwan
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