文章信息/Info

Title:

Progress of Chemo Responsive Shape Memory Materials

作者:

王美慶1; 應三九1; 王倡春2; 3

1.南京理工大學 化工學院，江蘇 南京 210094 ?2.南京工程學院 材料工程學院，江蘇 南京211167 ?3.江蘇省先進結構材料與應用技術重點實驗室，江蘇 南京211167

Author(s):

WANG Meiqing1;  YING Sanjiu1;  WANG Changchun2; 3

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

關鍵詞:

聚合物; 形狀記憶效應; 塑化作用; 溶脹效應; 納米復合物; 凝膠

Keywords:

polymer;  shape memory effect;  plasticization;  swelling effect;  nanocomposite;  gel

DOI:

10.7502/j.issn.1674-3962.2018.05.08

文獻標志碼:

A

摘要:

化學響應型形狀記憶材料因其獨特的響應方式而越來越受到重視。論述了化學響應型形狀記憶材料研究進展，主要包括形狀記憶聚合物、形狀記憶復合物以及形狀記憶凝膠等。根據其形狀記憶的原理，將化學響應型形狀記憶過程分為塑化回復過程、溶脹回復過程、溶解回復過程以及pH回復過程。塑化作用是溶劑分子與聚合物基體相互作用，降低高分子基體的玻璃化轉變溫度，實現形狀記憶效應；溶脹效應是溶劑分子擴散進入聚合物內部使自由體積膨脹，釋放出形變時存儲的彈性能實現形狀記憶效應；溶解回復型是可變相溶解后，通過受限彈性相回復實現形狀記憶效應；pH回復是一定pH環境下產生的質子化作用促進材料內部鏈段運動性，驅使去質子化作用時存儲的能量釋放實現形狀記憶效應。

Abstract:

Due to the unique response, chemo�瞨esponsive shape memory materials (SMMs) have attracted more and more attentions. Chemo�瞨esponsive 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�瞨esponsive 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�瞨esponsive 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.