聚苯乙烯(PS)性脆、玻璃化温度不高、抗冲击性不足等缺陷限制了其应用领域。通过苯环加氢可以有效改善PS的性能缺陷,通过氧化石墨烯(GO)修饰的碳纳米管(CNT)负载Ni-Pd双金属制备加氢催化剂可以用于PS的加氢反应。结果表明,GO修饰的CNT作载体的Ni-Pd双金属催化剂具有较高的催化活性和稳定性;在催化剂质量分数为7.5%、反应温度为153℃、反应压力为5.4 MPa、反应时间为6.2 h的条件下,PS转化率大于99%,加氢产物的链长保留率达90%。加氢产物的力学性能、玻璃化温度得到显著提升,且密度和吸水率更低。

Polystyrene (PS) has shortcomings such as brittleness,low glass transition temperature,and insufficient impact resistance,which limit its application areas.The hydrogenation of benzene ring in PS can effectively improve its performance.A hydrogenation catalyst for PS hydrogenation reaction can be prepared through loading Ni-Pd bimetallic materials on graphene oxide (GO) modified carbon nanotubes (CNTs).Results indicate that GO modified CNTs loaded Ni-Pd bimetallic catalyst exhibits high catalytic activity and stability.Under the reaction conditions that mass fraction of catalyst is 7.5%,reaction temperature is 153℃,reaction pressure is 5.4 MPa,and the reaction lasts for 6.2 h,the conversion of PS exceeds 99%,and the chain length retention rate of the hydrogenated PS reaches 90%.The hydrogenated PS has an improved mechanical property,a higher glass transition temperature,lower density and lower water absorption rate.

石优(1998-),男,硕士生,研究方向为工业催化,shiyo2023@163.com;何明阳(1962-),男,博士,教授,研究方向为聚合物离子交换催化材料,通讯联系人,hmy@cczu.edu.cn。