Shape memory poly(ε-caprolactone)-co-poly(ethylene glycol) foams with body temperature triggering and two-way actuation

Baker, Richard M.; Henderson, James H.; Mather, Patrick T.

doi:10.1039/c3tb20810a

Cited by 82 publications

(63 citation statements)

References 37 publications

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“…Mather's group [196] reported an important discovery, demonstrating that a semi- other groups suggested that this behavior is generic for semi-crystalline networks [197][198][199][200][201][202]. In particular, Lendlein's group in 2010 reported a two-way reversible tripleshape system in which a semi-crystalline network with two distinct melting transitions could reversibly switch among three shapes, again, with the presence of a constant external stress [203].…”

Section: Quasi 2w-sme For Semi-crystalline Networkmentioning

confidence: 94%

Recent progress in shape memory polymer: New behavior, enabling materials, and mechanistic understanding

Zhao

Xie

2015

Progress in Polymer Science

1,103

716

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Shape memory polymers (SMPs), as a class of programmable stimuliresponsive shape changing polymers, are attracting increasing attention from the standpoint of both fundamental research and technological innovations. Following a brief introduction of the conventional shape memory effect (SME), progress in new shape memory enabling mechanisms and triggering methods, variations of in shape memory forms (shape memory surfaces, hydrogels, and microparticles), new shape memory behavior (multi-SME and two-way-SME), and novel fabrication methods are reviewed. Progress in thermomechanical modeling of SMPs is also presented. Abbreviations:SCPs shape changing polymers; LCEs liquid crystalline elastomers; SMP shape memory polymer; SME shape memory effect; 2W two-way; 1W oneway; T trans transition temperature; T g glass transition temperature; T m melting temperature; T cl liquid crystal cleaning temperature; T d deformation temperature; T f shape fixing temperature; T c crystallization temperature; R f shape stability ratio; R r shape recovery ratio; T sw switching temperature; ε max maximum recoverable strain; σ max maximum recovery stress; SMC shape memory cycle; ε load strain under load; ε fixed strain; T r recovery Page 2 of 106 A c c e p t e d M a n u s c r i p t 2 temperature; ε rec recovered strain; V r strain recovery rate; T σmax temperature corresponding to σ max ; T sw,app apparent switching temperature; PCL poly(ε-caprolactone); SMPU shape memory polyurethane; EMU elemental memory unit; TME temperature memory effect; PU polyurethane; T i liquid-crystal isotropic transition temperature; T v vitrification temperature; CIE crystallization induced elongation; MIC melting induced contraction

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Section: Quasi 2w-sme For Semi-crystalline Networkmentioning

confidence: 94%

Recent progress in shape memory polymer: New behavior, enabling materials, and mechanistic understanding

Zhao

Xie

2015

Progress in Polymer Science

1,103

716

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“…81 Cross-linked foams of PCL-PEG can be compressed and recover to their original shape at body temperature, albeit with reduced dimensional stability at room temperature (Figure 3). 79 Photo-polymerized PLGA-PEG based materials also exhibit shape memory behavior and are less brittle than photopolymerized PLGA-dimethacrylates. 80 We recently reported high molecular weight (> 120 kDa) PLA-PEG-PLA thermoplastics exhibiting shape memory properties around physiological temperatures.…”

Section: Physical Propertiesmentioning

confidence: 99%

Biodegradable PEG-Based Amphiphilic Block Copolymers for Tissue Engineering Applications

Kutikov

Song

2015

ACS Biomater. Sci. Eng.

141

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Biodegradable tissue engineering scaffolds have great potential for delivering cells/therapeutics and supporting tissue formation. Polyesters, the most extensively investigated biodegradable synthetic polymers, are not ideally suited for diverse tissue engineering applications due to limitations associated with their hydrophobicity. This review discusses the design and applications of amphiphilic block copolymer scaffolds integrating hydrophilic poly(ethylene glycol) (PEG) blocks with hydrophobic polyesters. Specifically, we highlight how the addition of PEG results in striking changes to the physical properties (swelling, degradation, mechanical, handling) and biological performance (protein & cell adhesion) of the degradable synthetic scaffolds in vitro. We then perform a critical review of how these in vitro characteristics translate to the performance of biodegradable amphiphilic block copolymer-based scaffolds in the repair of a variety of tissues in vivo including bone, cartilage, skin, and spinal cord/nerve. We conclude the review with recommendations for future optimizations in amphiphilic block copolymer design and the need for better-controlled in vivo studies to reveal the true benefits of the amphiphilic synthetic tissue scaffolds.

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“…An impressive collection of work in the smart materials arena has focused on implementing a range of various chemistries for polymer structure and formation including polyurethanes[11], poly(caprolactone)[12–14], (meth)acrylates[15–17], ionomers[8], and thiol-ene chemistry[18]. In considering the possibility for using distinct polymerization reactions to form smart materials, the click paradigm represents a significant leap forward in its capacity for enabling molecular design that would improve the control of various macroscopic physicochemical properties.…”

Section: Introductionmentioning

confidence: 99%

Photo-mediated copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) “click” reactions for forming polymer networks as shape memory materials

McBride

Gong

Nair

et al. 2014

Polymer

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The formation of polymer networks polymerized with the Copper (I) – catalyzed azide – alkyne cycloaddition (CuAAC) click reaction is described along with their accompanying utilization as shape memory polymers. Due to the click nature of the reaction and the synthetic accessibility of azide and alkyne functional-monomers, the polymer architecture was readily controlled through monomer design to manipulate crosslink density, ability for further functionalization, and the glass transition temperature (55 to 120°C). Free strain recovery is used to quantify the shape memory properties of a model CuAAC network resulting in excellent shape fixity and recovery of 99%. The step growth nature of this polymerization results in homogenous network formation with narrow glass transitions ranges having half widths of the transition close to 15°C for these materials resulting in shape recovery sharpness of 3.9 %/°C in a model system comparable to similarly crosslinked chain growth polymers. Utilization of the CuAAC reaction to form shape memory materials opens a range of possibilities and behaviors that are not readily achieved in other shape memory materials such as (meth) acrylates, thiolene, thiol-Michael, and poly(caprolactone) based shape memory materials.

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Shape memory poly(ε-caprolactone)-co-poly(ethylene glycol) foams with body temperature triggering and two-way actuation

Cited by 82 publications

References 37 publications

Recent progress in shape memory polymer: New behavior, enabling materials, and mechanistic understanding

Recent progress in shape memory polymer: New behavior, enabling materials, and mechanistic understanding

Biodegradable PEG-Based Amphiphilic Block Copolymers for Tissue Engineering Applications

Photo-mediated copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) “click” reactions for forming polymer networks as shape memory materials

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