热重分析
材料科学
甲基橙
X射线光电子能谱
傅里叶变换红外光谱
丙烯酸
复合材料
扫描电子显微镜
二氧化钛
透射电子显微镜
光催化
聚合
共聚物
化学工程
高分子化学
化学
催化作用
聚合物
有机化学
工程类
纳米技术
作者
Su Qing Wang,Qing Lin Liu,Ai Mei Zhu
标识
DOI:10.1016/j.eurpolymj.2011.01.011
摘要
Composites of poly (N-isopropylacrylamide-co-acrylic acid)/titanium dioxide (TiO2) have been prepared via UV-initiated free radical polymerization. Fourier transform infrared spectra (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), environmental scanning electron microscope (ESEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) are used to study the composition, structure, and morphology of the as-prepared composites. TiO2 is found to be successfully encapsulated in the copolymer in spherical shapes with size of 2.5 μm. The thermo- and pH-responsive properties of the composites are observed using dynamic light scattering (DLS). The photocatalytic property of the composites is studied using UV–vis spectrophotometer on the degradation of methyl orange (MO) solution under various pHs and temperatures. Degradation ratio is higher at low pH and increases with increasing temperature above volume phase transition temperature (VPTT).
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