Multiresponsive reversible gels based on a carboxylic azo polymer
Multiresponsive reversible gels based on a carboxylic azo polymer
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DOI：
10.1039/b925163d
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发表时间：
2010-01-01
影响因子：
--
通讯作者：
Yu, Haifeng
中科院分区：
文献类型：
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作者：
Chen, Dong;Liu, Hui;Yu, Haifeng
基于氢键聚集和氢键的形成，在二甲基亚砜(DMSO)中合成了一种羧基偶氮聚合物PM6AzCOOH，制备了多响应可逆凝胶。由于聚合物PM6AzCOOH的特殊分子结构，所获得的凝胶对几种刺激表现出多响应行为，如温度、溶剂极性和光。系统地研究了它们的可逆多响应行为。研究发现，可通过加热、加入极性较低的溶剂或用紫外光照射来破坏所生成的凝胶。然后，凝胶可以通过反向过程进行改造，并具有完全的重复性。
Multiresponsive reversible gels were prepared with a carboxylic azo polymer (PM6AzCOOH) in dimethyl sulfoxide (DMSO) based on formation of H-aggregation and hydrogen bonds. Due to the specifically designed molecular structure of the polymer PM6AzCOOH, the obtained gel showed multiresponse behaviours to several stimuli, such as temperature, solvent polarity, and light. Their reversibly multiresponsive behaviours were systematically studied. It was found that the resulting gels could be destroyed by heating, adding a solvent with lower polarity, or irradiating with UV light. The gel could then be reformed by reverse processes with full reproducibility.