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Indexed by:Journal Papers

Date of Publication:2015-11-02

Journal:JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION

Included Journals:SCIE、EI、PubMed、Scopus

Volume:26

Issue:16

Page Number:1100-1111

ISSN No.:0920-5063

Key Words:hydroxyethyl cellulose; temperature-responsive; cloud point temperature; anion and cation effects

Abstract: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.