多相碳粒硅橡胶柔性吸波膜的制备及其性能  

Preparation and properties of flexible microwave absorbing film by integrating multiple-phase carbon particles with silicone rubber

作　　者：孙佳文 朱曜峰[1] SUN Jiawen;ZHU Yaofeng(School of Materials Science&Engineering,Zhejiang Sci-Tech University,Hangzhou310018,China)

机构地区：[1]浙江理工大学材料科学与工程学院,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2022年第4期533-541,共9页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家自然科学基金项目(51503183)。

摘　　要：为获得具有良好吸波和传感特性的柔性复合膜,以还原氧化石墨烯修饰聚合物衍生碳(CS@rGO)微球,以气相生长碳纳米纤维(Vapor grown carbon fibers,VGCFs)为功能剂、聚二甲基硅氧烷(Polydimethylsiloxane,PDMS)为基体,采用流延法制备CS@rGO-VGCF/PDMS复合膜;通过扫描电镜、X射线衍射仪、红外光谱等设备对复合膜的形貌和结构进行表征,并对复合膜的电磁参数、电阻变化进行了测试,分析功能剂CS@rGO微球与VGCFs对复合膜吸波性能的影响,以及探究具有最佳吸波性能复合膜的应变传感特性。结果表明:当功能剂质量分数为7%(CS@rGO微球与VGCFs质量比为1.5∶1),复合膜厚度为0.90 mm的最小反射损耗为-9.80 dB,对应有效吸波频宽为0.6 GHz;同时,复合膜具有大应变传感范围(50%)和高灵敏度(111.71)。该文制备CS@rGO-VGCF/PDMS复合膜具有优异的动态耐久性和稳定性,并能有效检测人体运动。In order to obtain flexible film with good microwave absorbing property and sensing property,reduced graphene oxide modified polymer-derived carbon microspheres(CS@rGO)were used to prepare CS@rGO-VGCF/PDMS composite film using vapor grown carbon fiber(VGCFs)as the functional agent and polydimethylsiloxane(PDMS)as matrix through casting method.The morphology and structure of the materials were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD)and Fourier transform infrared spectroscopy(FTIR).The electromagnetic parameters and resistance variation of the composite film were tested.The influence of functional agent CS@rGO microspheres and VGCFs on the microwave absorption property of the film was analyzed.The strain sensing characteristic of composite film with optimal microwave absorbing property were investigated.The results showed that when the mass fraction of the functional agent was 7%(the mass ratio of CS@rGO microspheres to VGCFs was 1.5∶1)and the thickness of the film was 0.90 mm,the maximum reflection loss could reach-9.80 dB and the corresponding effective absorbing bandwidth was 0.60 GHz.Furthermore,the film has a large strain sensing range(50%)and high sensitivity(111.71).The CS@rGO-VGCF/PDMS composite film has excellent dynamic durability and stability,which can effectively detect human motion.

关 键 词：柔性复合膜 流延法 功能剂 聚二甲基硅氧烷 吸波性能 应变传感 

分 类 号：TB332[一般工业技术—材料科学与工程]