CNT/PDMS复合材料的直写打印技术及性能测试
Direct writing printing technology and sensing performance test of CNT/PDMS
陆晗婧 1陈志刚 2罗斌 1肖洋 1李雅芳1
作者信息
- 1. 邵阳学院机械与能源工程学院,湖南邵阳 422000
- 2. 邵阳学院机械与能源工程学院,湖南邵阳 422000;高效动力系统智能制造湖南省重点实验室,湖南邵阳 422000
- 折叠
摘要
针对复合材料的制备需求以及具有导电性能的碳纳米管(CNT)-聚二甲基硅氧烷(PDMS)复合材料在柔性传感方向的使用需求,利用直写打印与复合材料制备相结合,研究了 CNT/PDMS复合材料的直写打印工艺及测试了其传感性能.在实验中,配制了不同CNT含量的打印墨水,通过测试其自举性及导电性得到CNT含量为7％的墨水在打印时出丝顺畅且能打印复杂结构.优选200 kPa的挤出气压、20 mm/s的打印速度进行打印.通过对不同形状的网格打印效果和导电性进行测试,选择60％密度的网格进行打印.为了提高固化后的导电性,选择80 ℃,加热2 h进行固化.在此基础上,打印CNT含量不同的网格结构,测试其灵敏度在0～10 kPa范围内变化相对明显,往后加压电阻变化率增长速度放缓;对材料往复施加不同压力,其稳定性良好;将不同质量砝码间歇式的压在网格结构上时,测试得该复合材料的传感分辨率良好.这为后续研究直写打印技术制备复合材料打下了良好的基础.
Abstract
For the preparation of composite materials and the application requirements of CNT/PDMS compos-ites with conductive properties in flexible sensing directions,direct writing printing was combined with compos-ite material preparation.The direct writing printing technology of CNT/PDMS was studied and its sensing properties were tested.In the experiment,printing inks with different CNT content were prepared to test their bootstrap and electrical conductivity of printing ink.Inks with a 7％CNT content printed smoothly and could print complex structures.Premium selected 200 kPa extrusion pressure,20 mm/s printing speed could get smooth filaments.Printing effect of different shapes of mesh and electrical conductivity were tested,and a 60％density mesh for printing to be selected.To improve the electrical conductivity after curing,premium selected 80 ℃ and heated 2 hours to cure.On this basis,grid structures with different CNT content were printed to test.The sensitivity changed obviously in the range of 0-10 kPa pressure,then the rate of resistance change increased slowly.To apply different pressures to the material in a reciprocating way,the stability of the composite materi-al was good.When weights of different masses were pressed intermittently on the grid structure,the sensor res-olution of the composite material was good.These have laid a good foundation for the follow-up studies of direct writing printing technology to prepare composite materials.
关键词
CNT/PDMS/复合材料/直写打印/传感性能Key words
CNT/PDMS/composite material/direct writing printing/sensing performance引用本文复制引用
基金项目
2022年邵阳学院校级研究生科研创新项目(CX2022SY039)
出版年
2024
NETL
NSTL
万方数据