| 超临界二氧化碳协助制备功能性PVA/CNT/Pd多级复合纳米材料 |
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| 引用本文： | 李宗鹏,张浩,许群.超临界二氧化碳协助制备功能性PVA/CNT/Pd多级复合纳米材料[J].高分子通报,2010(1). |
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| 作者姓名： | 李宗鹏 张浩 许群 |
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| 作者单位： | 郑州大学材料科学与工程学院,郑州,450052 |
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| 基金项目： | 教育部新世纪优秀人才计划;;河南省杰出青年科学基金资助项目(0512001200);; |
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| 摘 要： | 聚乙烯醇(PVA)是分子主链含有—CH2—CH(OH)—基团的高聚物,通过聚醋酸乙烯酯水解得到的水溶性高分子树脂。本工作在超临界CO2的辅助下使用聚乙烯醇来修饰碳纳米管(CNTs),目的是增强CNTs在水中的分散性。进一步利用这种PVA修饰过的CNTs作为催化剂载体,负载金属钯的纳米晶体颗粒,通过调节超临界CO2的压力以及控制反应过程中的磁力搅拌条件,实现了对PVA/CNT/Pd复合材料中钯纳米晶体形貌的控制,为研究水介质Suzuki coupling反应(铃木偶合反应)寻求一条新的道路。
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| 关 键 词： | 聚乙烯醇 钯纳米晶 超临界CO2 碳纳米管 |
Fabrication of PVA/CNT/Pd Functional Hybrid Nanocomposite with Assistance of Supercritical CO_2 |
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| LI Zong-peng,ZHANG Hao,XU Qun.Fabrication of PVA/CNT/Pd Functional Hybrid Nanocomposite with Assistance of Supercritical CO_2[J].Polymer Bulletin,2010(1). |
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| Authors: | LI Zong-peng ZHANG Hao XU Qun |
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| Institution: | College of Materials Science and Engineering;Zhengzhou University;Zhengzhou 450052;China |
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| Abstract: | Polyvinyl alcohol (PVA) which could get through hydrolysis reaction of polyvinyl acetate is a water-soluble polymer resin containing -CH_2-CH (OH)-groups in the main chain. In this study, polyvinyl alcohol (PVA) was used to enhance the solubility of carbon nanotubes (CNTs) in water, and then this PVA/CNTs composites were treated as a catalyst carrier to load metal particles of palladium nanocrystals. By changing the SC CO_2 pressure conditions and magnetic stirring, we can get PVA-modified CNTs and further achieve controllable morphology of palladium nanocrystals in PVA/CNT/Pd nanocomposite. |
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| Keywords: | Polyvinyl alcohol Palladium nanocrystals Supercritical CO_2 Carbon nanotubes |
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