摘要
以二维过渡金属碳/氮化物(MXene)和碳化沸石咪唑骨架(carbonized zeolitic imidazolate frameworks,CZIF)为功能填料,通过原位聚合法与热亚胺化工艺,成功制备兼具导电性与磁性能的MXene-CZIF/PI复合薄膜,并对复合薄膜的导电性、磁性能、力学性能、阻燃性能及热稳定性进行系统研究。结果表明:随着填料MXene和CZIF含量的增加,复合薄膜的电导率和饱和磁化强度显著提升。当MXene和CZIF含量达到40%(质量分数)时,PMCo-40薄膜的电导率可达0.33 S/cm,饱和磁化强度可达6.95 A·m^(2)·kg^(-1)。另外,PMCo-40薄膜表现出优异的综合性能:拉伸强度达到47.83 MPa,极限氧指数高达37.7%(体积分数),酒精灯下燃烧60 s后薄膜几乎没有变化,展现出良好的阻燃性能;在氮气氛围下800℃时的残炭量可达80.76%,表明其具有优异的热稳定性。
Using two-dimensional transition metal carbides/nitrides(MXene)and carbonized zeolitic imidazolate frameworks(CZIF)as functional fillers,MXene-CZIF/PI composite films with both conductivity and magnetic properties are successfully prepared by in-situ polymerization and thermal imidization processes.The electrical conductivity,magnetic properties,mechanical properties,flame retardant properties and thermal stability of the composite films are also systematically studied.The results show that as the content of MXene and CZIF fillers increases,the electrical conductivity and saturation magnetization of the composite films significantly improve.When the content of MXene and CZIF reaches 40%(mass fraction),the electrical conductivity reaches 0.33 S/cm,and the saturation magnetization reaches 6.95 A·m^(2)·kg^(-1).The PMCo-40 film exhibits excellent comprehensive performance with the tensile strength of 47.83 MPa,the limiting oxygen index(LOI)as high as 37.7%(volume fraction),and the film being virtually unchanged after 60 s of combustion under an alcohol lamp,demonstrating outstanding flame retardancy.The carbon residue at 800℃under nitrogen atmosphere reaches 80.76%,indicating exceptional thermal stability.
作者
杨雪雪
晁敏
刘石
张贝
骆春佳
颜录科
YANG Xuexue;CHAO Min;LIU Shi;ZHANG Bei;LUO Chunjia;YAN Luke(School of Materials Science&Engineering,Chang’an University,Xi’an 710061,China)
出处
《材料工程》
北大核心
2025年第6期188-197,共10页
Journal of Materials Engineering
基金
陕西省创新能力支持计划项目(2023-CX-TD-43)
陕西省重点研发计划项目(2022-YBSF-498,2024GX-YBXM-412)
宁夏回族自治区重点研发计划项目(22BDE02001)
中央高校基本科研业务费专项资金(300102312403,300103313208)。
