Kang Jong Hyun, Kim Ju Young, Jo Yejin, Kim Hyun-Suk, Jung Sung Mook, Lee Su Yeon, Choi Youngmin, Jeong Sunho
Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT) 141 Gajeong-ro, Yuseong-gu Daejeon 305-600 Korea
Department of Materials Science and Engineering, College of Engineering, Chungnam National University 99 Daehak-ro, Yuseong-gu Daejeon 305-764 Korea.
RSC Adv. 2019 Dec 4;9(68):39993-40002. doi: 10.1039/c9ra08461d. eCollection 2019 Dec 2.
In this study, we formulate three-dimensionally (3D) printable composite pastes employing electrostatically assembled-hybrid carbon and a polystyrene-polyisoprene-polystyrene tri-block copolymer elastomer for the fabrication of multi-stack printed piezoresistive pressure sensor arrays. To address a critical drawback of piezoresistive composite materials, we have developed a previously unrecognized strategy of incorporating a non-ionic amphiphilic surfactant, sorbitan trioleate, into composite materials. It is revealed that the surfactant with an appropriate amphiphilic property, represented by the hydrophilic-lipophilic balance (HLB) index of 1.8, allows for a reversible piezoresistive characteristic under a wide pressure range up to 30 kPa as well as a significant reduction of elastomer viscoelastic behavior. The 3D-printed pressure sensor arrays exhibit a sensitivity of 0.31 kPa in a linear trend, and it is demonstrated successfully that the position-addressable array device is capable of spatially detecting objects up to a pressure level of 22.1 kPa.
在本研究中，我们制备了三维（3D）可打印复合浆料，该浆料采用静电组装的混合碳和聚苯乙烯-聚异戊二烯-聚苯乙烯三嵌段共聚物弹性体，用于制造多层印刷压阻式压力传感器阵列。为了解决压阻复合材料的一个关键缺点，我们开发了一种以前未被认识到的策略，即将非离子两亲表面活性剂失水山梨醇三油酸酯加入到复合材料中。结果表明，具有适当两亲性的表面活性剂（以亲水亲油平衡（HLB）指数为1.8表示）在高达30 kPa的宽压力范围内具有可逆的压阻特性，同时显著降低了弹性体的粘弹性行为。3D打印的压力传感器阵列呈线性趋势，灵敏度为0.31 kPa，并且成功证明了位置可寻址阵列设备能够在高达22.1 kPa的压力水平下对物体进行空间检测。
