轻质柔性聚酰亚胺纸基电磁屏蔽材料的制备与性能  

Preparation and Properties of Light-weight Flexible Polyimide Paper-based Electromagnetic Shielding Composites

作　　者：张如强 张国亮[1] 龙柱[1,2] 张丹 李志强[3] 王士华 胡爱林 ZHANG Ruqiang;ZHANG Guoliang;LONG Zhu;ZHANG Dan;LI Zhiqiang;WANG Shihua;HU Ailin(Key Laboratory of Eco-Textiles,Ministry of Education,Jiangnan University,Wuxi 214122,China;Laboratory of Paper Technology,Jiangnan University,Wuxi 214122,China;Lianyungang Fiber New Materials Research Institute Co.,Ltd.,Lianyungang 222002,China)

机构地区：[1]江南大学生态纺织教育部重点实验室,无锡214122 [2]江南大学造纸研究室,无锡214122 [3]连云港纤维新材料研究院有限公司,连云港222002

出　　处：《高等学校化学学报》2021年第10期3211-3217,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:31600478);连云港“555工程”计划(批准号:2015-13)资助

摘　　要：基于聚酰亚胺纤维纸基导电骨架(PI-CP)的三维网络结构,通过聚吡咯(PPy)的气相沉积及无钯化学镀工艺在PI-CP上进行镍基金属的层层组装,制备了夹芯结构的镍/聚吡咯@聚酰亚胺纤维纸基电磁屏蔽材料(Ni/PPy@PI-CP);对其形貌、结构、导电性能、力学性能及电磁屏蔽性能进行了表征;并考察了温度、弯曲牢度和折叠次数对Ni/PPy@PI-CP导电性能和电磁屏蔽性能的影响.研究结果表明,Ni/PPy@PI-CP-3的电磁屏蔽性能可达到70 dB以上;Ni/PPy@PI-CP-3在弯曲变形下表现出优良的导电稳定性,其电导率损失可以忽略不计,经过200次的反复弯曲测试,其电导率仍保持在92.4%以上.此外,Ni/PPy@PI-CP还具有轻质及易于加工的特性,并具有稳定的热性能,于300℃下处理后电磁屏蔽性能仍保持在80%以上.Nickel/polypyrrole@polyimide fiber paper-based electromagnetic shielding composites(Ni/PPy@PI-CP)with sandwich structure were prepared by means of polyimide fiber paper-based conductive framework via vapor deposition of polypyrrole(PPy)and palladium-free electroless plating on PI-CP.Its morphology,electrical conductivity,mechanical properties and electromagnetic shielding performance were characterized,and the effects of temperature,bending degree,and folding times on the electrical conductivity and electro⁃magnetic shielding performance of Ni/PPy@PI-CP were investigated.The results show that the electromagnetic shielding performance of Ni/PPy@PI-CP-3 can reach more than 70 dB;Ni/PPy@PI-CP-3 exhibits excellent conductivity stability under bending deformation,and its conductivity loss can be ignored.Even after 200 times of repeated folding tests,the conductivity of Ni/PPy@PI-CP-3 remains around 92.4%.In addition,Ni/PPy@PI-CP-3 has the characteristics of light weight,easy processing,and has stable thermal properties,its electromagnetic shielding performance after 300℃treatment is still maintained at more than 80%.

关 键 词：柔性 聚吡咯 导电性 电磁屏蔽 纸基复合材料 

分 类 号：O631[理学—高分子化学]