期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 380, 期 1-3, 页码 250-256出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2011.02.024
关键词
Monodispersed polymer nanospheres; Soap-free emulsion polymerization; Particle size distribution; Click chemistry; Surface modification
资金
- National Science Foundation of China [20974023, 21034003, 51073040]
- Shanghai Committee of Science and Technology, China [10XD1400500]
Poly(St/DVB/GMA) nanospheres (PNs) were prepared by soap-free emulsion polymerization and the surfaces of the PNs were further functionalized by the thiol-epoxy click-chemistry of surface pendant epoxy groups with functional thiols. A variety of functional groups were successfully grafted to the PNs surfaces at high densities as exemplified by the reactions with 2-aminoethanethiol, thioglycolic acid, and 2-mercaptoethanol. All the reactions were easily controlled and the modified polymer nanospheres were well-dispersed in water. Very high surface charges were observed for the 2-aminoethanethiol and thioglycolic acid modified PNs in water, a manifestation of the high surface grafting densities of the ionizable groups. The adsorptions of acid orange and toluidine blue to, respectively, the 2-aminoethanethiol and thioglycolic acid functionalized PNs were examined, which fitted well to the Langmuir isotherm model. For the 2-aminoethanethiol modified PNs, the surface amino group density was found to be 1.1 mequiv/g, with an adsorption capacity of 398 mg/g of acid orange; while the thioglycolic acid modified PNs displayed 1.4 mequiv/g carboxylate groups and an adsorption capacity of 416 mg/g for toluidine blue. The new synthetic method appears to be general in scope and adaptive to a variety of surface functionalities and potential applications. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据