摘要
以聚乙二醇单甲醚2000为亲水段,双酚A型环氧树脂E51为疏水段,异氟尔酮二异氰酸酯为连接剂制备了含环氧基的双亲性大分子,将其命名为WEG。该双亲性大分子与荧光剂〔3-(9-咔唑基)苯甲酸〕、双酚A型环氧树脂在选择性溶剂(水)中共组装形成水性乳液。该乳液与改性胺类固化剂以质量比为2∶1混合并于室温固化后,制备了具有光致发光(荧光)功能的形状记忆高分子薄膜。采用FTIR、1HNMR、GPC、纳米粒度仪、荧光光谱仪和DSC等对WEG、乳液和薄膜的结构和性能进行表征与测试。结果表明,乳液粒径在7d内没有发生变化,保持在650~1000nm。荧光形状记忆薄膜具有光致发光功能,可在刺激响应条件下(80℃)7s基本恢复其原始形状,形状恢复率可达94.4%。
An amphiphilic macromolecule contained epoxy group, named WEG was prepared using methoxypoly(ethylene glycol)(m PEG2000) as hydrophilic segment, bisphenol A epoxy resin(E51) as hydrophobic segment, and isoflurone diisocyanate as linker. The amphiphilic macromolecule WEG was able to co-assemble with fluorescer, 3-(9-carbazolyl) benzoic acid and bisphenol A epoxy resin E51 in a selective solvent(water) to form water-based emulsions. The obtained emulsions mixed with a modified amine curing agent at a mass ratio of 2∶1 and cured at room temperature to prepare shape memory polymer films with photoluminescence(fluorescence) function. The structures and properties of WEG, emulsions and films were characterized by FTIR, 1 HNMR, GPC, nanometer particle size analyzer, fluorescence spectrometer and DSC. The results showed that the particle size of the emulsion did not change within 7 days and remained at 650~1000 nm. The shape memory polymer film had good photoluminescence function, and it could basically restore its original shape in 7 s under the condition of stimulus response(80 ℃), and the shape recovery rate could reach up to 94.4%.
作者
海春杰
宋雨方
林娜
李兰
张洪吉
东为富
HAI Chunjie;SONG Yufang;LIN Na;LI Lan;ZHANG Hongji;DONG Weifu(School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,Jiangsu,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2020年第5期898-905,共8页
Fine Chemicals
基金
国家自然科学基金项目(BK20150135)。
关键词
环氧树脂
双亲性
自组装
荧光
形状记忆
功能材料
epoxy resin
amphiphilicity
self-assembly
fluorescence
shape memory
functional materials
