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论文类型：期刊论文

发表时间：2018-07-01

发表刊物：ADSORPTION SCIENCE & TECHNOLOGY

收录刊物：SCIE

卷号：36

期号：5-6

页面范围：1260-1273

ISSN号：0263-6174

关键字：Carboxylated polymer microspheres; disproportionated rosin ester; dispersion polymerization; adsorption; methylene blue

摘要：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.