摘要
通过自由基聚合合成了一种侧链型偶氮聚电解质 ,聚丙烯酸 2 [4 (4′ 羧基苯基偶氮 )苯基 ]乙酯(PCAPEA) .详细研究了PCAPEA水溶液的pH值对其紫外 可见光谱和光响应性的影响 .研究发现 ,PCAPEA水溶液的紫外吸收光谱对pH值具有高度敏感性 ,并且在不同pH值条件下其光响应性有很大差别 .这种差别反映了PCAPEA分子中的偶氮苯基团在水溶液中聚集状态的变化 .本论文还研究了PCAPEA与聚二烯丙基二甲基氯化铵 (PDAC)在不同溶剂中的静电逐层自组装 .研究发现 ,PCAPEA的水和有机溶剂的混合溶液也可用来进行自组装 。
A side-chain azo polyelectrolyte, poly (2-[4-(4'-carboxyphenylazo) phenoxy]ethyl acrylate) (PCAPEA) was synthesized through free radical polymerization. Influences of solution pH values on the UV-Vis absorption spectra and photo-responsive behaviors of PCAPEA in aqueous solution were studied. The results showed that the UV-Vis absorption spectra of PCAPEA in aqueous solutions change with the solution pH value, and its photo-responsive behaviors also significantly depend on the solution pH value. This observation indicated that ionization degree changing with pH variation controls the existing conformation or aggregation of PCAPEA in the solution. PCAPEA not only in aqueous solution but also in water-tetrahydrofuran mixture was successfully fabricated into self-assembled multilayers with poly(diallydimethylammonium chloride) by an electrostatic layer-by-layer process. This new self-assembly technology supplied a feasible way for the electrostatic self-assembly of the polyelectrolytes with poor aqueous solubility.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2002年第1期96-101,共6页
Acta Polymerica Sinica
基金
国家自然科学基金资助项目 (基金号 5 992 5 30 9
