Natural eggshell membranes exhibiting programmable shape recovery characteristics
- PDF / 692,249 Bytes
- 8 Pages / 612 x 792 pts (letter) Page_size
- 12 Downloads / 148 Views
Research Letter
Natural eggshell membranes exhibiting programmable shape recovery characteristics Chang Liu, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China; Department of Chemistry, Northeastern University, Shenyang, Liaoning 110004, China Chen Liu, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China Qian Li, Department of Chemistry, Northeastern University, Shenyang, Liaoning 110004, China Miao Song, Pacific Northwest National Laboratory, Richland, WA 99352, USA Dun Niu, Department of Chemistry, Northeastern University, Shenyang, Liaoning 110004, China Mingming Ma, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, China Xing Zhang, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China; School of Materials Sciences and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China Address all correspondence to Xing Zhang, Dun Niu, Mingming Ma at [email protected], [email protected], [email protected] (Received 17 April 2018; accepted 23 May 2018)
Abstract In this study, a novel shape memory polymer (SMP), eggshell membrane (ESM), with macroscopic mesh structures and microscopic crosslinked protein fibers, has shown water-stimulated shape recovery characteristics. Our results show that the collagen triple-helical molecular chains and disulfide-rich motifs in the ESM function as net-points retaining essential structures during deformation, while hydrogen bonds play a key role as switch units for shape recovery through water stimulation. We also demonstrate that programmable shape recovery characteristics of ESM can be obtained by modulating the number of net-points. This study may inspire the design of new programmable SMPs.
Introduction Shape memory polymers (SMPs) are stimulus-responsive materials that have the ability to recover their original shapes after being deformed into temporary shapes by applying specific external stimuli, such as heat,[1,2] light,[3,4] alternative magnetic field,[5] electricity,[6,7] or solvent/water.[8–10] Among them, water-stimulated SMPs are able to recover their original shapes from temporary deformation through interaction with water. Synthetic water-responsive SMPs including poly(ethylene glycol) hydrogels,[9] polypyrrole composite films,[10] and poly(vinyl alcohol)[11] have been developed for water-driven actuation and biomedical applications. Natural water-responsive SMPs produced by biologic systems, including animal hairs,[12] peacock’s tail covert feathers,[13] caddisfly silk,[14] and spider draglines[15] have also been recently reported. Previous studies mainly focused on the illustration of excellent mechanical adaptivity and shape recovery characteristics of these natural water-responsive SMPs in relation to their unique microstructures
Data Loading...
