Preparation and Structural Analysis of Nano-Silver Loaded Poly(styrene-co-acrylic acid) Core-Shell Nanospheres with Defined Shape and Composition

被引:8
|
作者
Zhang, Jin [1 ]
Zhao, Xiaoyu [1 ]
Wang, Yanfei [1 ]
Zhu, Liang [1 ]
Yang, Libin [1 ]
Li, Gang [2 ]
Sha, Zuoliang [1 ]
机构
[1] Tianjin Univ Sci & Technol, Coll Chem Engn & Mat Sci, Tianjin Key Lab Marine Resources & Chem, Tianjin 300457, Peoples R China
[2] Chinese Acad Sci, State Key Lab Environm Chem & Ecotoxicol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
来源
NANOMATERIALS | 2017年 / 7卷 / 09期
基金
中国国家自然科学基金;
关键词
core-shell structure; composite nanospheres; polymers; synthesis; structural analysis; ENHANCED RAMAN-SCATTERING; CATALYTIC-PROPERTIES; OPTICAL-PROPERTIES; SILICA COLLOIDS; NANOPARTICLES; POLYSTYRENE; METAL; GOLD; NANOSHELLS; SPHERES;
D O I
10.3390/nano7090234
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A systematic study for the preparation and structural analysis of poly(styrene-co-acrylic acid) composite nanospheres (PSA) and silver nanoparticles loaded poly(styrene-co-acrylic acid) composite nanospheres (nAg@PSA) is reported. Poly(styrene-co-acrylic acid) nanospheres were synthesized by soap-free emulsion polymerization of styrene (St) and acrylic acid (AA) in water. Ag nanoparticles (Ag-NPs) were well-dispersed on the surfaces of poly(styrene-co-acrylic acid) composite nanospheres by in situ chemical reduction of AgNO3 using NaBH4 as a reducing agent in water. The particle size of PSA nanospheres was uniform. The surfaces of PSA nanospheres were distributed by highly uniform half-sphere arrays. Those half-sphere protruded more with the increase of the feeding amount of AA or the feed ratios of AA and St. The carboxyl groups content of nanospheres was directly proportional to the nanosphere surface area. This relationship and X-ray photoelectron spectroscopy and transmission electron microscopy images of the PSA nanospheres indicate that the acrylic acid was mainly distributed on the surface of the polystyrene spheres with unnegligible thickness. The number of Ag-NPs depends on immobilized carboxyl groups on the surface of PSA, according to thermogravimetry, ultraviolet-visible, X-ray diffraction and transmission electron microscopy results.
引用
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页数:14
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