摘要
以二步水溶液分散聚合法制备了具有温度及pH值双重响应性能的核-壳单分散纳米微凝胶,对微凝胶的形态、结构及粒径分布进行了表征,并采用动态光散射对其溶胀性能进行了研究,发现高度溶胀的P4VP壳层会对核的充分溶胀带来一定限制,并使其溶胀率下降.
Narrowly distributed core - shell microgels with temperature - and pH- sensitivity have been successfully prepared by a two - step aqueous dispersion polymerization . The morphology, structure and size distributions of resultant core - shell particles were deter- mined. The deswelling behavior investigated by dynamic laser light scattering shows that highly cross- linked P4VP shell will restrict the ,swelling degree of the lightly cross- linked PNIPAM core, resulting in a decrease in the swelling ratio of the whole core - shell particles.
出处
《嘉应学院学报》
2005年第6期21-26,共6页
Journal of Jiaying University
关键词
响应性凝胶
核-壳结构
受限溶胀
二步水溶液分散聚合
responsive hydrogels
core- shell structure
restricted swelling
two- step aqueous dispersion polymerization
