Pd/PMAA/PVDF复合膜制备及催化性能研究  

Catalytic Oxidation of Benzyl Alcohol by Pd/PMAA/PVDF Composite Membrane

作　　者：王帅 张成浩 史鑫 史圆圆 陈熙[1] 王建祖 Wang Shuai;Zhang Chenghao;Shi Xin;Shi Yuanyuan;Chen Xi;Wang Jianzu(School of Materials Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学材料科学与工程学院,天津300387

出　　处：《山东化工》2022年第2期1-3,6,共4页Shandong Chemical Industry

基　　金：天津市教委科研计划项目(NO.2017ZD04)。

摘　　要：制备了一种Pd/PMAA/PVDF复合催化膜用于催化氧化苯甲醇制备苯甲醛。首先通过蒸馏-沉淀聚合法制备了PMAA微球,然后将PMAA微球与PVDF共混,利用浸没沉淀相转化法制备了PMAA/PVDF基膜,随后在PMAA微表面原位还原生成Pd纳米粒子,制备了Pd/PMAA/PVDF复合膜。通过FTIR、XPS、SEM等对膜进行了表征,探究了不同条件下复合膜对苯甲醇的催化氧化性能。结果表明,PMAA微球和Pd纳米粒子成功引入到复合膜内;当催化膜面积为76.96 cm^(2),反应温度为90℃,反应时间为6 h时,苯甲醇的转化率可达到92.30%,苯甲醛的收率达到70.42%,选择性约为76.30%;同时,复合膜可重复使用,具有良好的稳定性。A Pd/PMAA/PVDF composite catalytic membrane was prepared for the catalytic oxidation of benzyl alcohol to benzaldehyde.Firstly,PMAA microspheres were prepared by distillation precipitation polymerization,then PMAA microspheres were blended with PVDF.PMAA/PVDF base membrane was prepared by immersion precipitation phase transformation method.Finally,Pd nanoparticles were reduced in situ on the surface of PMAA to prepare Pd/PMAA/PVDF composite membrane.The membrane was characterized by FTIR,XPS and SEM.It was proved that PMAA microspheres and Pd nanoparticles were successfully introduced into the composite membrane.The results show that when the catalytic membrane area is 76.96 cm^(2),the reaction temperature is 90℃and the reaction time is 6 h,the conversion rate of benzyl alcohol could reach 92.30%,the yield of benzaldehyde reached 70.42%,and the selectivity of benzaldehyde is about 76.30%.At the same time,the composite membrane can be reused and has good stability.

关 键 词：聚偏氟乙烯 钯纳米粒子 绿色催化 苯甲醛 

分 类 号：TQ426[化学工程] O643.3[理学—物理化学]