匀度指数对碳纸原纸强度与孔隙特性的影响研究

Study on the Effect of Formation Index on the Strength and Pore Properties of Carbon Paper-base Paper

关键词:  碳纸原纸  匀度指数  分散剂  抗张强度  孔隙率

Key Words:carbon paper-base paper  formation index  dispersant  tensile strength  porosity

摘要:本研究以碳纤维为原料，通过改变分散剂种类制备具有不同匀度性能的碳纸原纸，考察了碳纤维浆料的分散稳定性及其均匀性变化规律，探讨了匀度指数与透气度、抗张强度、孔隙率等指标之间的关系。结果表明，与单一APAM、TOCNs和PU分散剂相比，质量分数0.1% APAM和1.0% PU复合的分散剂体系制备的碳纤维浆料分散稳定性和均匀性得到改善，该复合分散剂制备碳纸原纸匀度指数最好，为10.32。随着匀度指数的减小，碳纸原纸厚度偏差从21.76 mm降至0.96 mm，抗张强度从0.15 kN/m增加到1.68 kN/m，孔隙率从93.5%下降到90.5%，透气度从1 658.9 L/(m²·s)下降到1 171.5 L/(m²·s)。

Abstract:In this study， carbon fiber was used as raw material to prepare carbon paper-base paper with different formation properties by changing the type of dispersant， the dispersion stability and uniformity of carbon fiber suspension were investigaled， and the relationship between formation index and permeability， tensile strength and porosity was discussed. Compared with single APAM， TOCNs and PU dispersants， the dispersion stability and uniformity of carbon fiber suspension dispersed by composite dispersants system composed of 0.1% APAM and 1% PU were improved， which had the best formation index of 10.32. With the decrease of formation index， the thickness deviation of carbon paper bas-paper decreased from 21.76 mm to 0.96 mm， the tensile strength increased from 0.15 kN/m to 1.68 kN/m， the porosity decreased from 93.5% to 90.5%， and the permeability decreased from 1 658.9 L/（m²·s） to 1 171.5 L/（m²·s）.