采用羧基丁腈胶乳(XNBRL)和水溶性酚醛树脂(WSPR)作为胶黏剂,通过浆内添加法制备碳纸原纸及碳纸。结果表明,随着阳离子剂添加量的增加,浆料电负性逐渐减弱,当阳离子剂质量分数为1.5%时,浆料Zeta电位为0,此时胶黏剂在碳纤维上产生良好吸附。随着WSPR比例增加,碳纸拉伸强度先增大后趋于稳定;电阻率、透气率和平均孔径则先减小后趋于稳定。当XNBRL与WSPR质量比为6∶4时,碳纸性能最佳,与未添加WSPR的碳纸相比,其拉伸强度由4.0MPa提升至6.2MPa,提升了55.0%;平面电阻率由54.6mΩ·cm降低至36.4mΩ·cm,下降了33.3%;透气率由56209.2(mL·mm)/(cm2·h·mmHg)降低至35247.1(mL·mm)/(cm2·h·mmHg),下降了37.3%;平均孔径由67.58μm减小至49.52μm,减小了26.7%。
Carbon paper base paper and carbon paper were prepared using carboxyl nitrile butadiene rubber latex (XNBRL) and water-soluble phenolic resin (WSPR) as adhesives through the in-pulp addition method.The results showed that the electronegativity of the pulp decreased gradually with the increase of the amount of cationic agent.When the mass fraction of cationic agent was 1.5%,the Zeta potential of the pulp was 0,and the adhesive had a good adsorption on carbon fiber.With the increase of WSPR ratio,the tensile strength of carbon paper first increased and then became stable,and the resistivity,air permeability and average pore diameter decreased at first and then tended to be stable.When the XNBRL/WSPR mass ratio was 6∶4,the performance of carbon paper was the best.Compared with XNBRL carbon paper without WSPR,its tensile strength was increased from 4.0MPa to 6.2MPa,an improvement of 55.0%.The surface resistivity decreased from 54.6mΩ·cm to 36.4mΩ·cm,a reduction of 33.3%.The air permeability decreased from 56209.2(mL·mm)/(cm2·h·mmHg) to 35247.1(mL·mm)/(cm2·h·mmHg),a reduction of 37.3%.The average pore diameter decreased from 67.58μm to 49.52μm,a decrease of 26.7%.
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