炔基化改性聚乙烯醇吸氢材料的制备及吸氢性能表征  

Preparation of Alkynyl-Modified Poly(vinyl alcohol) Hydrogen Materials and Characterization of Its Hydrogen Uptake Capability

作　　者：常凤雯 杨晓娇[2] 黄德顺[2] 赵鹏翔[2] 帅茂兵[2] 周元林[1] 李佩龙[2] 

机构地区：[1]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,四川绵阳621010 [2]中国工程物理研究院材料研究所,四川绵阳621908

出　　处：《高分子材料科学与工程》2017年第4期132-136,共5页Polymer Materials Science & Engineering

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)

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。Poly （vinyl alcohol） （PVA） was regarded as substrate, which was grafted with alkynyl chains by carbamate esterifying the hydroxylic groups with different dosage of propargylamine, The structure and substitution degree of the resulting alkynyl-PVA esters were characterized by nuclear magnetic resonance spectroscopy. Pd nanopartieles/alkynyl-modified polymer composites were synthesized in the course of in stiu reduction reaction. Laser particle size analyzer was used to ensure particle size distribution of nanopaUadium. Meanwhile, the new hydrogen getters were prepared by mixing different degree of alkynyl-modified PVA with Pd/C catalyst and then grinding uniformly. And hydrogen uptake capability of hydrogen getters was characterized by PVT method. Results show the hydrogen absorption effect with high degree of alkynyl-modified PVA, which is mixed with Pd/C catalyst, is the best and the hydrogen absorption capacity is 0. 8893 mol/kg.

关 键 词：聚乙烯醇 纳米钯 PD/C催化剂 吸氢材料 吸氢性能 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业]