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以聚乙烯醇(PVA)为基体,分别通过醚化反应和氨基甲酸酯化反应在PVA高分子链上引入炔基形成富炔高分子,用红外、核磁共振法对富炔高分子的分子结构及接枝度进行表征。利用化学还原法制备出富炔高分子负载纳米钯的复合吸氢材料,采用透射电镜(TEM)对复合材料的形貌及微观结构进行表征,确定纳米钯的形貌、粒径分布以及其在富炔高分子基体中的分散情况。结果表明,溴丙炔醚化改性PVA因溶解性问题导致纳米钯分散性不好、团聚现象严重;而炔丙胺氨基甲酸酯化改性PVA负载的纳米钯粒径均一,分散性良好,为下一步吸氢性能的研究打下基础。
Polyvinyl alcohol (PVA) as the matrix, respectively, through the etherification reaction and urethanization reaction in the introduction of alkynyl groups on the PVA polymer chain to form alkyne-rich polymer, with infrared, nuclear magnetic resonance method of molecules rich in alkyne Structure and grafting degree were characterized. The composite hydrogen absorbing materials with rich alkyne supported palladium nanoparticles were prepared by chemical reduction method. The morphology and microstructure of the composite materials were characterized by transmission electron microscopy (TEM) to determine the morphology and particle size distribution of the nano-palladium. Rich alkyne polymer matrix dispersion. The results show that due to the solubility problem, the bromopropynyl etherification modified PVA has poor dispersibility and agglomeration of the nano-palladium. However, the nanoparticle palladium supported by the propargyl amine carbamate modified PVA has uniform particle size and good dispersibility, For the next hydrogen absorption properties of the foundation.