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Indexed by:期刊论文

Date of Publication:2018-07-01

Journal:ADSORPTION SCIENCE & TECHNOLOGY

Included Journals:SCIE

Volume:36

Issue:5-6

Page Number:1260-1273

ISSN No.:0263-6174

Key Words:Carboxylated polymer microspheres; disproportionated rosin ester; dispersion polymerization; adsorption; methylene blue

Abstract:Carboxyl-functionalized polymer microspheres with a rosin moiety were prepared through dispersion polymerization using styrene, disproportionated rosin ester, and methylacrylic acid as raw materials. The effects of dispersion medium (ethanol/water) ratio, monomer mass proportion and initiator concentration on the polymer microspheres were studied. Scanning electron microscopy, laser particle size analysis, thermogravimetric analysis and Fourier transform infrared spectroscopy were used to characterize the microspheres, and their carboxyl contents were determined by the conductance titration method. The adsorption of methylene blue of the microspheres was also investigated. The results showed that rosin-based carboxyl-functionalized polymer microspheres were successfully synthesized. The microspheres exhibited smooth, spherical shapes with good monodispersity and high thermal stability. The carboxyl content of the microspheres prepared under optimum conditions was 0.089 mmol.g(-1), with the average particle size approximately 950 nm. With increasing carboxyl contents of the polymer micro-spheres, their methylene blue adsorption capacities increased. The maximum methylene blue adsorption capacity of the microspheres was 59.55 mg.g(-1) in the highest carboxyl content.