材料科学
复合材料
碳纳米管
制作
选择性激光烧结
复合数
烧结
导电体
渗流阈值
数字光处理
弹性体
环氧树脂
电阻率和电导率
医学
替代医学
病理
投影机
工程类
计算机科学
电气工程
计算机视觉
作者
Xue Li,Hao Ouyang,Shaojie Sun,Jinzhi Wang,Guoxia Fei,Hesheng Xia
出处
期刊:ACS applied polymer materials
[American Chemical Society]
日期:2023-04-04
卷期号:5 (4): 2944-2955
被引量:3
标识
DOI:10.1021/acsapm.3c00138
摘要
Developing flexible elastomer composites for sensors and effective fabrication methods is of great significance. Single-walled carbon nanotubes (SWCNTs)-wrapped poly(dimethylsiloxane) covalent adaptable networks (PDMS-CANs) composite powders were prepared through a liquid-phase deposition and adsorption process and used for selective laser sintering (SLS) three-dimensional (3D) printing. The electrically conductive PDMS composite parts with self-healing lattice structures were printed. Ingeniously utilizing the quasi-static processing characteristic of SLS printing, the conductive segregated SWCNT networks are in situ formed in PDMS-CANs during the printing process, showing an ultralow percolation threshold of 0.007 wt %. Due to the photothermal and electrothermal effects of SWCNTs, the composites possess multifunctions including crack diagnosis and self-healing triggered by heat, electricity, or light. To demonstrate the potential application, the SLS-printed SWCNTs@PDMS-CANs strain sensors with various lattice structures were designed and SLS-printed. Their strain sensitivity is compared and analyzed by finite element modeling. The results show that the TPMS Schwartz structure possesses the highest sensitivity due to the concentrated localized strain.
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