水溶液室温自干成膜制备荧光形状记忆高分子材料

Preparation of fluorescent shape memory polymer materials by self-crossing emulsion at room temperature

摘要:

以甲基丙烯酸甲酯（MMA），丙烯酸丁酯（BA），双丙酮丙烯酰胺（DAAM），丙烯酸（AA）为主要原料制备了聚丙烯酸酯双亲性大分子(MBDA共聚物)，该双亲性大分子与荧光素（FM）在水中可以共组装形成水性荧光高分子乳液(MBDA/FM共组装乳液)。该乳液与己二酸二酰肼（ADH）均匀混合并于室温干燥固化后，即可得具有荧光功能的形状记忆高分子材料（MBDA/FM-ADH膜），其在防伪、装饰、荧光探针等领域具有潜在的应用前景。这一通过室温自交联乳液制备功能性形状记忆高分子材料的方法，具有工艺过程简单、绿色环保、可控性好，适于大规模生产的特点。此外，对MBDA共聚物、MBDA/FM共组装乳液和MBDA/FM-ADH膜的结构和性能进行了系列表征，结果表明：共组装乳液的粒径在100~200nm之间，荧光强度一定范围内依赖于荧光素的添加量；薄膜在紫外灯下发出均匀的绿色荧光，荧光发射峰值波长514nm，且在T≥ 70 ℃（Tg=31.9℃）时的形状回复~100%，具荧光和形状记忆双重功能。

Abstract:

An polyacrylate amphiphilic macromolecule (MBDA copolymer) was prepared using methyl methacrylate (MMA), butyl Acrylate (BA), acrylic acid (AA) and diacetone acrylamide (DAAM). The amphiphilic macromolecule was able to co-assemble with fluorescein in water to form water-based fluorescent emulsion (MBDA/FM co-assembled emulsion). The fluorescent shape memory material (MBDA/FM-ADH film) was obtained by mixing with adipic acid dihydrazide (ADH) and curing at room temperature, which can get a wide range of potential applications in the field of anti-counterfeiting, decoration and fluorescent probes. The method for preparing functional shape memory material by self-crosslinking emulsion at room temperature has the features of simple process, friend-environment, good controllability and suitable for large-scale production. The results showed that the particle size of the co-assembled emulsions remained at 100~200nm and the fluorescence intensity of emulsions increased with the amount of fluorescein within a certain range. The films which have dual functions of fluorescence and shape memory emitted uniform green fluorescence under ultraviolet light (em=514nm) and can recovery almost 100% under T≥ 70 ℃ （Tg=31.9 ℃).