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论文类型：期刊论文

发表时间：2015-11-02

发表刊物：JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION

收录刊物：SCIE、EI、PubMed、Scopus

卷号：26

期号：16

页面范围：1100-1111

ISSN号：0920-5063

关键字：hydroxyethyl cellulose; temperature-responsive; cloud point temperature; anion and cation effects

摘要：2-Hydroxy-3-butoxypropyl hydroxyethyl celluloses (HBPEC), which are thermoresponsive polymers, are prepared by grafting butyl glycidyl ether onto hydroxyethyl cellulose. The effects of several factors on the cloud point (Tc) of the HBPEC are also investigated. The Tc of HBPEC can be tuned to a ranging from 17.0 to 43.0 degrees C by changing the molar substitution of hydrophobic groups. Increasing the concentration of HBPEC leads to a faster phase transition as well as a corresponding linear decrease in the Tc. A series of salts with common anions or cations are used to investigate the effects of specific anions or cations on the Tc of HBPEC aqueous solutions. It is discovered that the Tc of HBPEC is largely influenced by the variation of cation identity and concentration. Plotting Tc as a function of cation activity shows that the Tc can be classified by charge density.