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Progress of Chemo Responsive Shape Memory Materials(PDF)

MATERIALS CHINA[ISSN:1674-3962/CN:61-1473/TG]

Issue:
2018年第05期
Page:
59-66
Research Field:
前沿综述
Publishing date:

Info

Title:
Progress of Chemo Responsive Shape Memory Materials
Author(s):
WANG Meiqing1 YING Sanjiu1 WANG Changchun23
1.School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China ?2.School of Material Engineering, Nanjing Institute of Technology, Nanjing 211167, China ?3.Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing 211167, China
Keywords:
polymer shape memory effect plasticization swelling effect nanocomposite gel
CLC:

PACS:
-
DOI:
10.7502/j.issn.1674-3962.2018.05.08
DocumentCode:

Abstract:
Due to the unique response, chemoresponsive shape memory materials (SMMs) have attracted more and more attentions. Chemoresponsive SMMs which mainly include shape memory polymer, shape memory composite and shape memory gel, are reviewed in this paper. Based on the shape memory principles, chemoresponsive SMMs are divided into plasticization recovery SMMs, swelling recovery SMMs, soluble recovery SMMs and pH induced recovery SMMs. Plasticization, as the interaction between solvent molecules and the polymer matrix, reduces the glass transition temperature of polymer and realizes the shape memory effect. Swelling effect is the diffusion of solvent molecules into the polymeric network and induces the free volume of matrix to expand, shape memory is activated by releasing the elastic energy stored during the deformation of temporary shape. Soluble recovery means the constrained elastic phase recovers after switchable phase is soluble and the shape memory is achieved. For pHresponsive SMMs, protonation promotes the motion of the inner segment in a certain pH environment, which drives the energy stored at deprotonation release to achieve the shape memory effect.

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Last Update: 2018-06-06