热重分析
聚苯乙烯
Knoevenagel冷凝
透射电子显微镜
扫描电子显微镜
材料科学
傅里叶变换红外光谱
化学工程
胶束
高分子化学
催化作用
化学
纳米技术
有机化学
水溶液
聚合物
复合材料
工程类
作者
Yongfang Yang,Hua Li,Yue Zhang,Hefang Wang,Lidong Xu,Hanying Zhao
标识
DOI:10.1002/asia.201700011
摘要
Abstract Hybrid nanocrystals of PVBA‐ b ‐PS/ZIF‐8 were prepared by the growth of ZIF‐8 on the surface of the self‐assembled structures from poly( p ‐vinylbenzoic acid)‐block‐polystyrene. Two different morphologies—micelles and vesicles—were obtained in selective solvents owing to the different ratios of PVBA to PS blocks. The structure and morphology of the PVBA‐ b ‐PS/ZIF‐8 composites were characterized by Fourier transform IR spectroscopy, thermogravimetric analysis, X‐ray diffraction, transmission electron microscopy and scanning electron microscopy. PVBA‐ b ‐PS/ZIF‐8 showed high catalytic performance in Knoevenagel condensation reactions at room temperature, which were attributed to the more exposed active sites of the small ZIF‐8 nanocrystals grown in a confined space and a high concentration of reactants in the polymeric aggregates.
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