造纸过程微纳能源收集及其在自供电浆浓传感中的应用研究

Papermaking Process Micro/Nano-power Harvesting and Self-powered Sensor

关键词:  纸浆  液体能量  摩擦纳米发电机  自供电传感

Key Words:pulp  liquid energy  triboelectric nanogenerator  self-powered sensors

摘要:本研究将摩擦纳米发电机应用于收集纸浆流体产生的机械能，探究了不同质量分数的纳米纤维素悬浮液与固体的接触起电情况，阐明了微纳能源向电能转化的机理，发现液体浓度与输出性能呈负相关，并据此设计了双电极的液固摩擦纳米发电机，电压输出的特异性差异可以作为浓度的反馈信号。结果表明，该自供电传感器具备优异的灵敏度（表面活性剂、木质素和碳酸钙及三者混合物对传感灵敏度的线性拟合度均保持在0.96以上）、出色的稳定性和毫秒级的响应时间（40 ms内即可完成对浆波信号的传感，线性拟合度为0.99）。本研究旨在为“双碳”背景下迈向智慧造纸时代提供一种可持续能源的解决思路。

Abstract:In this study， a triboelectric nanogenerator was utilized to harvest mechanical energy generated from pulp fluids. The contact electrification of different concentrations of nanocellulose suspensions with solids was investigated. The mechanism of conversion of micro/nano-power to electrical energy was elucidated. The liquid concentration was found to be negatively correlated with the output performance， and a two-electrode liquid-solid triboelectric nanogenerator was designed accordingly， where the specific difference in voltage output could be used as a feedback signal for the concentration. The results showed that the self-powered sensor had excellent sensitivity （the linear fitting degree of surfactants， lignin， calcium carbonate and their mixtures to the sensitivity of the sensor remained above 0.96）， outstanding stability， and millisecond response time （the pulping signal could be sensed within 40 ms， and the linear fit was 0.99）. This study aims to provide a sustainable energy solution for the era of smart paper-making in the context of carbon peaking and carbon neutrality goals.