敏感性水凝胶及其应用研究进展

本文论述了各类敏感性水凝胶的发展历史和目前研究状况以及它们的应用研究进展,同时也对影响敏感性的凝胶结构因素和有关水凝胶敏感性相转变的物理解释作了简单介绍。     

ON SWELLING CHARACTERISTICS AND MECHANISM OF TEMPERATURE SENSITIVE HYDROGELS

A series of N-substituted acrylamide monomers and the temperature sensitive hydrogels of their copolymer with N, N'-methylene-bis -acrylamide (Bis) have been synthesized. The effects of monomer structures, composition of the initial monomer mixture, polymerization temperature, the extent of ionization of the network and the presence of acid, base, salt or organic compound on the formation and the swelling characteristics of the temperature sensitive hydrogels have been systematically studied. The mechanism of the temperature sensitive phase transformation of the hydrogels was also investigated.     

温度敏感性水凝胶合成反应及性能研究

<正> 水凝胶是一种能显著地溶胀于水但在水中并不能溶解的亲水性聚合物凝胶。水凝胶的性质不仅与聚合单体和交联剂的性质以及聚合工艺条件有关,而且还取决于溶胀时的条件,如溶胀温度和溶胀介质的pH值等。有一些水凝胶随着溶胀温度升高到某一温度以上时会发生从溶胀的软的透明状态到消溶胀的硬的不透明状态的变化,在这一温度附近的溶胀比变化往往可达几倍到几十倍。如果将溶胀温度降到这一温度以下时,凝胶状