Thermoresponsive cellulose ether and its flocculation behavior for organic dye removal. (20th January 2016)

• Record Type: Journal Article
• Authors: Tian, Ye; Ju, Benzhi; Zhang, Shufen; Hou, Linan
• Is Part Of: Carbohydrate polymers. Volume 136(2016)
• Page Start: 1209
• Page End: 1217
• Publication Date: 2016-01-20
• Subjects: Cellulose ether -- Thermoresponsivity -- Organic dye -- Flocculation -- Recycling; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2015.10.031
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: The thermoresponsive 2-hydroxy-3-butoxypropyl hydroxyethyl cellulose (HBPEC) was synthesized. HBPEC can self-assemble into micelles below the LCST. HBPEC micelles can flocculate when the temperature is above CFT. A novel method for removal of hydrophobic organic dyes using HBPEC was developed. HBPEC can be recycled by a simple and efficient method. 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.