title: Preparation and phase transition behaviors of temperature-responsive 3-butoxy-2-hydroxypropyl hydroxyethyl celluloses.
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 °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.
authors.forename: Ye
authors.initials: Y
authors.lastname: Tian
authors.affiliation: a State Key Laboratory of Fine Chemicals , Dalian University of Technology , Dalian 116024 , PR China.
authors.forename: Benzhi
authors.initials: B
authors.lastname: Ju
authors.affiliation: a State Key Laboratory of Fine Chemicals , Dalian University of Technology , Dalian 116024 , PR China.
authors.forename: Shufen
authors.initials: S
authors.lastname: Zhang
authors.affiliation: a State Key Laboratory of Fine Chemicals , Dalian University of Technology , Dalian 116024 , PR China.
authors.forename: Xiuling
authors.initials: X
authors.lastname: Duan
authors.affiliation: a State Key Laboratory of Fine Chemicals , Dalian University of Technology , Dalian 116024 , PR China.
authors.forename: Daopeng
authors.initials: D
authors.lastname: Dong
mesh_terms: D000838:Anions / Q000737:chemistry; D001672:Biocompatible Materials / Q000138:chemical synthesis / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D055598:Chemical Phenomena; D004852:Epoxy Compounds / Q000737:chemistry; D006860:Hydrogen Bonding; D057927:Hydrophobic and Hydrophilic Interactions; D007202:Indicators and Reagents / Q000737:chemistry; D007700:Kinetics; D015394:Molecular Structure; D008970:Molecular Weight; D019906:Nuclear Magnetic Resonance, Biomolecular; D044367:Phase Transition; D012995:Solubility; D044366:Transition Temperature
chemical_list: D000838:Anions; D001672:Biocompatible Materials; D002412:Cations; D004852:Epoxy Compounds; D007202:Indicators and Reagents; C022794:n-butyl glycidyl ether; D002482:Cellulose; C002283:hydroxyethylcellulose
keywords: anion and cation effects; cloud point temperature; hydroxyethyl cellulose; temperature-responsive