聚(N-异丙基丙烯酰胺)/石墨烯纳米复合水凝胶的制备及其溶胀性能(英文)  

Preparation,Structure and Swelling Behavior of Poly(N-iospropylacryamide)/graphene Nanocomposite Hydrogel

作　　者：范萍[1] 陈秀萍[1] 黄方麟[1] 陈枫[1] 杨晋涛[1] 钟明强[1] 

机构地区：[1]浙江工业大学材料科学与工程学院,浙江杭州310014

出　　处：《材料科学与工程学报》2015年第1期22-25,40,共5页Journal of Materials Science and Engineering

基　　金：National Natural Science Foundation of China(51303158);Natural Science Foundation of Zhejiang Province(LQ12E03004);The Opening Foundation of Zhejiang Provincial Top Key Discipline(G9713101002)

摘　　要：聚N-异丙基丙烯酰胺(Poly N-isopropylacrylamide,PNIPA)是一种能对外界温度产生响应的智能水凝胶。但是它的平衡溶胀率和响应速度不高,其应用受到一定的限制。本文通过原位聚合法制备了聚N-异丙基丙烯酰胺/氧化石墨烯(GO)水凝胶复合材料。并采用化学还原法对其还原获得了PNIPA/石墨烯复合水凝胶。通过傅里叶红外光谱(FTIR)和扫描电镜(SEM)分别表征了凝胶的化学结构和内部形态。测定了凝胶的平衡溶胀率、温度响应性及其在高温(45℃)时的消溶胀性能。研究结果表明:石墨烯的加入使凝胶的多孔结构增加,水释放通道增加,因而PNIPA/石墨烯水凝胶显示出更高的平衡溶胀率,更快的消溶胀速度以及更敏感的温度响应性。Poly N-isopropylacrylamide（PNIPA）is an intelligent hydrogel which exhibits volume transition in response to temperature change.However,the low equilibrium swelling ratio and response rate limit its application scope.In order to solve this limitation,PNIPA/graphene oxide（PNIPA/GO）hydrogel composite was synthesized through in-situ polymerization.And then it was reduced to PNIPA/graphene composite with hydrazine hydrate.Effect of graphene on the structure and morphology of PNIPA/graphene hydrogel was analyzed by Fourier transform infrared spectrum（FTIR）and scanning electron microscopy（SEM）.Swelling kinetics,equilibrium swelling ratio and response kinetics on heating of PNIPA/graphene hydrogel were also investigated in order to understand its smart properties.Results show that with the addition of graphene,porous structure of hydrogel increases,which provides more water-releasing channel.Therefore,compared with pure PNIPA hydrogel,PNIPA/graphene hydrogels exhibit higher equilibrium swelling ratio,faster deswelling rate and better temperature sensitivity.With the increasing content of graphene,PNIPA/graphene hydrogels show better smart properties.

关 键 词：石墨烯 水凝胶 N-异丙基丙烯酰胺 温敏性 

分 类 号：TB332[一般工业技术—材料科学与工程]