碱性电池隔膜用丙纶非织造布的等离子体改性

利用低温等离子体技术对碱性电池隔膜用丙纶非织造布进行表面改性处理,探讨了影响电池隔膜性能的因素,利用红外光谱、扫描电镜对材料表面性能进行了表征分析。结果表明,不同气体的等离子体对丙纶非织造布进行表面处理的最佳工作参数放电气体、放电功率、放电时间、工作压强分别为:氩气,70 W,3 min,15 Pa;氧气,120 W,3 min,30 Pa;空气,100 W,3 min,50 Pa。通过等离子体表面活化处理,在丙纶表面引入了亲水性基团,同时产生了刻蚀,丙纶非织造布的吸碱速率可提高至每10 min 8 cm左右,吸碱率提高至250%,面电阻大幅降低至8 Ω/cm2左右。

Plasma surface modification of polypropylene non-woven fabric for battery separator

The surface modification of polypropylene non-woven fabric for battery separator was carried out by low-temperature plasma treatment technology. The factors affecting the properties of battery separator were discussed. The surface properties of the modified samples were characterized by IR and SEM. The results showed that the technological parameters, such as plasma gas, plasma power, treating time, working pressure, of plasma treatment were optimized as followed: 70 w, 3 min, 15 Pa for argon atmosphere; 120 w, 3 min, 30 Pa for oxygen atmosphere; 100 w, 3 min, 50 Pa for air atmosphere. The plasma surface modification contributed hydrophilic polar group on the surface of polypropylene fiber and caused etching. The alkali absorption speed and quantity were increased up to about 8 cm per 10 min and 250% , respectively, when the sheet resistivity was decreased to about 8Ω/cm2.