Shape memory/change effect in a double network nanocomposite tough hydrogel

In this paper, we present a systematic investigation on the shape memory/change effect in a double network nanocomposite tough hydrogel. Water-content dependency of the response of this hydrogel to heating and wetting by water is confirmed. Since this hydrogel is tough (even after being fully wetted in water) and has a relatively lower swelling ratio, apart from conventional shape memory/change effect as in ordinary hydrogels, additional features have been realized. These features include heating induced shape memory effect utilizing the absorbed water as the transition component, mechano-responsive shape change effect after water wetting and water-induced shape memory effect. (C) 2014 Elsevier Ltd. All rights reserved.

[1]  T. Kurokawa,et al.  Water-Induced Brittle-Ductile Transition of Double Network Hydrogels , 2010 .

[2]  Jian Ping Gong,et al.  Physical hydrogels composed of polyampholytes demonstrate high toughness and viscoelasticity. , 2013, Nature materials.

[3]  F. Alexis,et al.  Stimulus responsive nanogels for drug delivery , 2011 .

[4]  T. Kurokawa,et al.  Double‐Network Hydrogels with Extremely High Mechanical Strength , 2003 .

[5]  Jun Fu,et al.  Super-tough double-network hydrogels reinforced by covalently compositing with silica-nanoparticles , 2012 .

[6]  K. Kabiri,et al.  Superabsorbent Polymer Materials: A Review , 2008 .

[7]  Wei Min Huang,et al.  Buckling of poly(methyl methacrylate) in stimulus-responsive shape recovery , 2011 .

[8]  Wei Min Huang,et al.  Thermo/chemo-responsive shape memory effect in polymers: a sketch of working mechanisms, fundamentals and optimization , 2012, Journal of Polymer Research.

[9]  R. Kasi,et al.  Stimuli-responsive polymer gels. , 2008, Soft matter.

[10]  F. Topuz,et al.  Formation of hydrogels by simultaneous denaturation and cross-linking of DNA. , 2009, Biomacromolecules.

[11]  A. DeMaria,et al.  Catheter-deliverable hydrogel derived from decellularized ventricular extracellular matrix increases endogenous cardiomyocytes and preserves cardiac function post-myocardial infarction. , 2012, Journal of the American College of Cardiology.

[12]  Kinam Park,et al.  Environment-sensitive hydrogels for drug delivery , 2001 .

[13]  Andreas Lendlein,et al.  Shape-Memory Polymers , 2010 .

[14]  Yongjun Zhang,et al.  Kinetics of Glucose-Induced Swelling of P(NIPAM-AAPBA) Microgels , 2011 .

[15]  Kinam Park,et al.  Smart Polymeric Gels: Redefining the Limits of Biomedical Devices. , 2007, Progress in polymer science.

[16]  W. Huang,et al.  Wet to Shrink: an Approach to Realize Negative Expansion upon Wetting , 2009 .

[17]  W. Huang,et al.  Stimulus-responsive shape memory materials: A review , 2012 .

[18]  Joseph Jagur-Grodzinski,et al.  Polymeric gels and hydrogels for biomedical and pharmaceutical applications , 2010 .

[19]  Wei Min Huang,et al.  Thermo-/chemo-responsive shape memory/change effect in a hydrogel and its composites , 2014 .

[20]  Yoshihito Osada,et al.  Shape memory in hydrogels , 1995, Nature.

[21]  Jun Fu,et al.  Instability/collapse of polymeric materials and their structures in stimulus-induced shape/surface morphology switching , 2014 .

[22]  Yoshihito Osada,et al.  Stimuli-responsive polymer gels and their application to chemomechanical systems , 1993 .