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Converse piezoelectric behavior of three-dimensionally printed polymer and comparison of the in-plane and out-of-plane behavior
Materials Science and Engineering: B ( IF 3.6 ) Pub Date : 2019-11-30 , DOI: 10.1016/j.mseb.2019.114447
Patatri Chakraborty , Chi Zhou , D.D.L. Chung

The converse piezoelectric effect (out-of-plane and in-plane directions) is reported in 3D-printed polymer without filler or poling, consistent with previously reported direct piezoelectric effect (out-of-plane direction only). Resin 1 (acrylate ester, viscosity 95 cP) and Resin 2 (methacrylate, viscosity 2950 cP) are used in the printing by stereolithography. Both direct and converse effects stem from the 2D shear stress during printing causing 2D in-plane molecular alignment. Due to its higher viscosity, Resin 2 gives more molecular alignment and hence higher piezoelectric coupling coefficient d (0.4 vs. 0.2 pC/N). The out-of-plane d is similar for the direct and converse effects in the linear regime, which occurs below 30 kPa compressive stress in the direct effect and below 1 V/m in the converse effect. Both converse and direct effects are reversible, whether in the linear regime or not. The higher is the applied electric field, the lower is d, due to strain saturation.



中文翻译:

三维印刷聚合物的逆压电行为以及面内和面外行为的比较

在没有填料或极化的3D打印聚合物中报告了相反的压电效应(面外和面内方向),这与以前报道的直接压电效应(仅面外方向)一致。树脂1(丙烯酸酯,粘度为95 cP)和树脂2(甲基丙烯酸酯,粘度为2950 cP)用于通过立体平版印刷的印刷中。直接和相反的影响都源自打印期间的2D剪切应力,从而导致2D平面内分子对齐。由于其较高的粘度,树脂2具有更多的分子取向,因此压电耦合系数d也更高(0.4对0.2 pC / N)。面外d对于线性状态下的正向和反向效应,情况相似,在正向作用下低于30 kPa压缩应力而在逆向作用下低于1 V / m时发生。无论是线性还是非线性状态,逆向和直接作用都是可逆的。由于应变饱和,施加的电场越高,d越小。

更新日期:2019-11-30
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