Linarts Artis, Sherrell Peter C, Mālnieks Kaspars, Ellis Amanda V, Šutka Andris
Institute of Technical Physics, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena 3/7, Riga, LV-1048, Latvia.
School of Chemical and Biomedical Engineering, Faculty of Engineering and Information Technology, The University of Melbourne, Parkville, 3010, Australia.
Small. 2023 Apr;19(14):e2205563. doi: 10.1002/smll.202205563. Epub 2023 Jan 3.
Herein, a new paradigm of triboelectric polymers-the triboelectric laminate-a volumetric material with electromechanical response comparable to the benchmark soft piezoelectric material polyvinylidene difluoride is reported. The electromechanical response in the triboelectric laminate arises from aligned dipoles, generated from the orientation of contact electrification in the laminates bulk volume. The dipoles form between sequential bilayers consisting of two different electrospun polymer fibers of different diameter. The loose interface between the fiber bilayers ensures friction and triboelectric charging between two polymers. The electric output from the electrospun triboelectric laminate increases with increasing density of the bilayers. This system design has clear benefits over other flexible devices for mechanical energy harvesting as it does not require any poling procedures, and the electromechanical response is stable over 24 h of continuous operation. Moreover, the electromechanically responsive electrospun laminate can be made from all types of polymers, thus providing ample room for further improvements or functionalities such as stretchability, biodegradability, or biocompatibility. The concept of a triboelectric laminate can be introduced into existing triboelectric nanogenerator form factors, to dramatically increase charge harvesting of a variety of devices.
在此，我们报道了一种摩擦电聚合物的新范例——摩擦电层压板，这是一种体积材料，其机电响应与基准软压电材料聚偏二氟乙烯相当。摩擦电层压板中的机电响应源于排列整齐的偶极子，这些偶极子由层压板本体体积内接触起电的取向产生。偶极子形成于由两种不同直径的电纺聚合物纤维组成的连续双层之间。纤维双层之间的松散界面确保了两种聚合物之间的摩擦和摩擦起电。电纺摩擦电层压板的电输出随着双层密度的增加而增加。这种系统设计相对于其他用于机械能收集的柔性装置具有明显优势，因为它不需要任何极化程序，并且在连续运行24小时内机电响应稳定。此外，具有机电响应的电纺层压板可以由所有类型的聚合物制成，从而为进一步改进或实现诸如可拉伸性、生物可降解性或生物相容性等功能提供了充足空间。摩擦电层压板的概念可以引入现有的摩擦电纳米发电机外形因素中，以显著增加各种装置的电荷收集。
