title: Thermoresponsive cellulose ether and its flocculation behavior for organic dye removal.
abstract: A thermoresponsive polymer, 2-hydroxy-3-butoxypropyl hydroxyethyl cellulose (HBPEC), was prepared by grafting butyl glycidyl ether (BGE) onto hydroxyethyl cellulose (HEC). The lower critical solution temperature (LCST) and critical flocculation temperature (CFT) of HBPEC were varied by changing the molar substitution (MS) and salt concentrations. Transmission electron microscopy (TEM) images and fluorescence spectroscopy showed that HBPEC can assemble into micelles. Additionally, using Nile Red as a model dye, the performance of HBPEC for the removing Nile Red from aqueous solutions via cloud point extraction procedures was investigated in detail. The encapsulation behavior of dye in the aqueous solution of HBPEC was studied by fluorescence spectroscopy and fluorescence microscope. The experimental results indicated that 99.4% of dye was removed from the aqueous solutions, and the HBPEC was recycled and reused easily, Furthermore, the recycle efficiency (RE) and maximum loading capacity portrayed little loss with the number of cycles.
authors.affiliation: State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, PR China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Tian
authors.affiliation: State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, PR China. Electronic address: jubenzhi@dlut.edu.cn.
authors.forename: Benzhi
authors.initials: B
authors.lastname: Ju
authors.affiliation: 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: State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, PR China.
authors.forename: Linan
authors.initials: L
authors.lastname: Hou
mesh_terms: D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry / Q000302:isolation & purification*; D004785:Environmental Pollutants / Q000737:chemistry / Q000302:isolation & purification*; D005427:Flocculation; D057927:Hydrophobic and Hydrophilic Interactions; D008823:Micelles; D010078:Oxazines / Q000737:chemistry / Q000302:isolation & purification; D044367:Phase Transition; D011108:Polymers / Q000737:chemistry; D012995:Solubility; D013696:Temperature; D014867:Water / Q000737:chemistry
chemical_list: C000610471:2-hydroxy-3-butoxypropyl hydroxyethyl cellulose; D004396:Coloring Agents; D004785:Environmental Pollutants; D008823:Micelles; D010078:Oxazines; D011108:Polymers; D014867:Water; D002482:Cellulose; C044808:nile red
keywords: Cellulose ether; Flocculation; Organic dye; Recycling; Thermoresponsivity