文章信息/Info

Title:

Progress of Chemo Responsive Shape Memory Materials

作者:

王美慶1; 應(yīng)三九1; 王倡春2; 3

1.南京理工大學(xué) 化工學(xué)院，江蘇 南京 210094 ?2.南京工程學(xué)院 材料工程學(xué)院，江蘇 南京211167 ?3.江蘇省先進結(jié)構(gòu)材料與應(yīng)用技術(shù)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(guān)鍵詞:

聚合物; 形狀記憶效應(yīng); 塑化作用; 溶脹效應(yīng); 納米復(fù)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(xué)響應(yīng)型形狀記憶材料因其獨特的響應(yīng)方式而越來越受到重視。論述了化學(xué)響應(yīng)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(fù)合物以及形狀記憶凝膠等。根據(jù)其形狀記憶的原理，將化學(xué)響應(yīng)型形狀記憶過程分為塑化回復(fù)過程、溶脹回復(fù)過程、溶解回復(fù)過程以及pH回復(fù)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(zhuǎn)變溫度，實現(xiàn)形狀記憶效應(yīng)；溶脹效應(yīng)是溶劑分子擴散進入聚合物內(nèi)部使自由體積膨脹，釋放出形變時存儲的彈性能實現(xiàn)形狀記憶效應(yīng)；溶解回復(fù)型是可變相溶解后，通過受限彈性相回復(fù)實現(xiàn)形狀記憶效應(yīng)；pH回復(fù)是一定pH環(huán)境下產(chǎn)生的質(zhì)子化作用促進材料內(nèi)部鏈段運動性，驅(qū)使去質(zhì)子化作用時存儲的能量釋放實現(xiàn)形狀記憶效應(yīng)。

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.