水介质中接枝聚 N-异丙基丙烯酰胺的海藻酸钠的温敏行为。

Thermoresponsive behavior of sodium alginate grafted with poly(N-isopropylacrylamide) in aqueous media.

机构信息

Department of Chemical Engineering, University of Patras, GR-26504 Patras, Greece.

"P. Poni" Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania.

出版信息

Carbohydr Polym. 2018 Mar 15;184:118-126. doi: 10.1016/j.carbpol.2017.12.059. Epub 2017 Dec 23.

DOI:10.1016/j.carbpol.2017.12.059

PMID:29352902

Abstract

Thermoresponsive graft copolymers were synthesized. Thermally induced properties were introduced by grafting poly (N-isopropylacrylamide) (PNIPAM) side chains onto a sodium alginate backbone. The resulting graft copolymers cover a broad range in PNIPAM composition and molecular weight. Remarkable thermothickening behavior in water and 0.1 M NaCl is observed by viscometry when the temperature, concentration, weight ratio of PNIPAM side chains to backbone, and PNIPAM molecular weight are higher than certain critical values. This behavior is reversible and could have applications in oil rigs and drug delivery systems.

摘要

合成了温敏接枝共聚物。通过将聚（N-异丙基丙烯酰胺）（PNIPAM）侧链接枝到海藻酸钠主链上来引入热诱导性能。所得接枝共聚物的 PNIPAM 组成和分子量范围很广。当温度、浓度、PNIPAM 侧链与主链的重量比以及 PNIPAM 分子量高于某些临界值时，通过粘度测量观察到在水中和 0.1 M NaCl 中显著的温致增稠行为。这种行为是可逆的，可能在石油钻井平台和药物输送系统中有应用。