摘要
为解决当下电容式非接触传感器制备过程复杂、传感性能不足以及电介质对性能影响不明的难题,将还原氧化石墨烯@聚甲基丙烯酸甲酯(rGO@PMMA)分散液与聚丙烯酸正丁酯(PBA)胶乳共混后烘干,制备rGO@PMMA/PBA柔性复合薄膜传感器。通过扫描电子显微镜(SEM)、红外光谱仪及紫外光谱仪表征复合粒子表面形貌和rGO的吸附性能,使用电感电容电阻测试仪表(LCR表)探究不同介电性薄膜传感器的非接触传感性能。结果表明:氧化石墨烯(GO)吸附到PMMA上出现褶皱表面,经抗坏血酸(Vc)还原后的rGO仍可稳定吸附于PMMA颗粒表面,形成rGO@PMMA复合粒子;当rGO@PMMA/PBA复合膜中复合粒子rGO@PMMA的含量高至10.0%时,rGO@PMMA/PBA复合膜仍然具有柔性;膜的介电常数和导电性随着膜中复合粒子rGO@PMMA填充量的增高不断增大和增强;传感器性能最优时的复合粒子rGO@PMMA填充量为0.20%,此时的传感器具有柔性以及最小的物体感知尺寸和最远的感知距离,并能辨识浅埋沙土下的物体及方位。该研究结果为制备高性能柔性薄膜非接触式电容传感器提供了一种新方法。
In order to solve the problems of current capacitive proximity sensors, such as complex preparation process, insufficient sensing performance and unclear influence of dielectric on performance, reduced graphene oxide@polymethyl methacrylate(rGO@PMMA) dispersion was blended with poly(n-butyl acrylate)(PBA) latex and the blend was dried to obtain rGO@PMMA/PBA flexible composite film sensors. The surface morphology of the composite particles and the adsorption performance of rGO were characterized by scanning electron microscopy(SEM), infrared spectroscopy and ultraviolet spectroscopy. The proximity sensing performance of different dielectric film sensors was explored by the inductance, capacitance and resistance tester(LCR meter). The results showed that graphene oxide(GO) was adsorbed on PMMA with a wrinkled surface, and rGO after Vc reduction could still be stably adsorbed on the surface of PMMA particles to form rGO@PMMA composite particles. However, when the content of the composite particle rGO@PMMA in rGO@PMMA/PBA composite films increased to 10.0%, rGO@PMMA/PBA composite film was still flexible. With the increase of the filling amount of rGO@PMMA composite particles in the film, the dielectric constant and electrical conductivity were enhanced. When the filling amount of the composite particle rGO@PMMA was 0.20%, the sensors′ performance was the optimal. The sensors were flexible, could sense the minimum objects in the maximum sensing distance, and could identify the objects and the orientation of objects under shallow sandy soil. The above research results provide a new method for the preparation of high-performance flexible proximity capacitive sensors.
作者
王刚
杨雷
周青
严家兴
李剑浩
WANG Gang;YANG Lei;ZHOU Qing;YAN Jiaxing;LI Jianhao(College of Textile Science and Engineering(International Institute of Silk),Zhejiang Sci-Tech University,Hangzhou 310018,China;Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province,Hangzhou 310018,China;Zhejiang Kefeng Silicone Co.,Ltd.,Jiaxing 314422,China)
出处
《浙江理工大学学报（自然科学版）》
2023年第2期219-227,共9页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
浙江省自然科学基金项目(LY18E030008)
2021海宁市科技计划工业项目(20210115)。
关键词
石墨烯
复合粒子
柔性复合薄膜
非接触
传感器
graphene
composite particles
flexible composite film
proximity
sensor
