炔基化改性聚乙烯醇吸氢材料的制备及吸氢性能表征
发布时间：2018-10-30 15:49
【摘要】：以聚乙烯醇(PVA)高分子材料为基体,通过氨基甲酸酯化反应在PVA高分子链上引入炔基形成炔基功能化的高分子,利用核磁共振法对炔基化高分子的分子结构及接枝度进行表征。通过化学还原法制备出炔基化高分子负载纳米钯的复合材料,采用激光粒度仪确定纳米钯粒径分布。同时将不同接枝度炔基功能化的PVA和Pd/C催化剂,按照一定的比例采用研磨法制备出吸氢材料。利用PVT法对上述所有的吸氢材料的吸氢性能进行了研究。结果表明,氨基甲酸酯化改性PVA接枝度高的炔基化高分子与Pd/C混合研磨后的吸氢材料的吸氢效果最好,吸氢容量为0.8893 mol/kg。
[Abstract]:Based on polyvinyl alcohol (PVA) polymer material, acetylene group was introduced into PVA polymer chain by carbamate esterification to form alkynyl functionalized polymer. The molecular structure and graft degree of alkynylated polymers were characterized by NMR. The nano-palladium nanocomposites supported on alkynylated polymer were prepared by chemical reduction method. The particle size distribution of nano-PD was determined by laser particle size analyzer. At the same time, PVA and Pd/C catalysts with different grafted degree were prepared by grinding method. The hydrogen absorption properties of all the materials mentioned above were studied by PVT method. The results showed that the hydrogen-absorbing materials with high grafted degree of PVA modified by carbamate and Pd/C were the best, and the hydrogen absorption capacity was 0.8893 mol/kg..
【作者单位】： 西南科技大学四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地;中国工程物理研究院材料研究所;
【基金】：国家自然科学基金资助项目(51573172) 中国工程物理研究院材料研究所所长基金(SJZ201506)
【分类号】：O632.31
本文编号：2300444
[Abstract]:Based on polyvinyl alcohol (PVA) polymer material, acetylene group was introduced into PVA polymer chain by carbamate esterification to form alkynyl functionalized polymer. The molecular structure and graft degree of alkynylated polymers were characterized by NMR. The nano-palladium nanocomposites supported on alkynylated polymer were prepared by chemical reduction method. The particle size distribution of nano-PD was determined by laser particle size analyzer. At the same time, PVA and Pd/C catalysts with different grafted degree were prepared by grinding method. The hydrogen absorption properties of all the materials mentioned above were studied by PVT method. The results showed that the hydrogen-absorbing materials with high grafted degree of PVA modified by carbamate and Pd/C were the best, and the hydrogen absorption capacity was 0.8893 mol/kg..
【作者单位】： 西南科技大学四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地;中国工程物理研究院材料研究所;
【基金】：国家自然科学基金资助项目(51573172) 中国工程物理研究院材料研究所所长基金(SJZ201506)
【分类号】：O632.31
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