木材改良湿气发电机的设计及性能研究.

:To solve the problem that practical applications of devices in the field of moisture generation are limited by complex preparation processes and high material costs, we developed an environmentally friendly, low-cost wood-based moisture generator (W -MEG) by a simple modified process. Firstly, the wood was delignified using a 2. 5% sodium chlorite (NaClO2 ) solution to keep its natural water transport channels open. Secondly, we prepared sodium alginate / reduced graphene oxide (SA/ rGO) hydrogels with excellent moisture absorption and ion diffusion ability and coated them onto the wood surface. Finally, to further improve the power generation performance of the prepared W-MEG, the degree of hydrogel immersion into the internal channels of the wood was controlled by adjusting the time of the reduced pressure impregnation process to form an asymmetric structure with more top and less bottom, which further expanded the ion concentration distribution. Based on this asymmetrical structure, taking advantage of wood's natural directional water transport properties and ion diffusion effects, our W-MEG can generate an open-circuit voltage of 220 mV and a short-circuit current of 0. 28 μA at 80% relative humidity (RH), with a power output in the RH range of 35%-95%. In addition, by integrating multiple W-MEG units, it can be used as an efficient power source to drive miniature commercial devices such as LEDs, which has the potential for practical applications. This study provides new insights into simple, inexpensive and efficient moisture energy harvesting devices and enables novel technologies for the utilization of wood. [ABSTRACT FROM AUTHOR]