Novel pH- and temperature-responsive polymer: Tertiary amine starch ether
Novel pH- and temperature-responsive polymer: Tertiary amine starch ether
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新型 pH 和温度响应型聚合物：叔胺淀粉醚
DOI：
10.1016/j.carbpol.2014.08.043
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发表时间：
2014
影响因子：
11.2
通讯作者：
Zhang Shufen
中科院分区：
文献类型：
--
作者：
Yuan Xu;Ju Benzhi;Zhang Shufen
开发了一种新型的双pH和温度响应叔胺淀粉醚（TAS）。通过在羟乙基淀粉上接枝二丙基或二丁基环氧丙胺进行了合成。通过改变烷基链长、平均摩尔取代量（MS）和溶液pH值，可将TAS的云点温度（TC）调节在26 ~ 72.8℃的范围内。随着烷基链长度、质谱和溶液pH值的减小，tof TAS增大。温度与pH值呈线性关系，表明温度可调。由于叔氨基和疏水烷基的存在，这些TAS还表现出单一的ph敏感性。本文提出的合成策略可用于从多种多糖中制备具有pH和温度双响应特性的其他新型生物材料。
A novel double pH- and temperature-responsive tertiary amine starch ether (TAS) has been developed. Synthesis was performed by grafting dipropyl or dibutyl epoxypropylamine onto hydroxyethyl starch. The cloud point temperatures (TC) of TAS could be tuned to a wide range from 26 to 72.8 °C by changing the alkyl chain length, their average molar substitution (MS), and pH value of the solution. TheTCof TAS increases with decreasing the alkyl chain length, MS, and pH value of the solution. A linear relationship occurs between theTCand the pH, indicating well-tunableTC. These TAS also showed single pH-sensitive property due to the existence of tertiary amino and hydrophobic alkyl groups. The synthetic strategy presented here could be employed in the preparation of other novel biomaterials with dual pH- and temperature-responsive properties from a variety of polysaccharides.