摘要
采用L16(45)正交法研究了酸的浓度等五个因素对废弃全氟磺酸离子膜化学再生效果的影响。实验表明,盐酸浓度为15%～20%,水浴温度为60℃,浸泡时间为12～24 h,超声时间为1～2 h,EDTA浓度为0.2 mol/L条件下,离子膜中杂质元素被基本除去,离子膜离子交换容量(IEC)可恢复到新膜的80%～90%。电子显微镜扫描结果显示,离子膜羧酸层孔洞较多,直接回用会因OH-反渗降低电流效率,需要加以修复才能利用。
With L16 （4^5） orthogonal method, the effects of concentration of acid and other five factors on the chemical regeneration process for waste perfluo-sulfonate ion membrane are studied. The optimal operation parameters are shown as follows：15% -20% of concentration of hydrochloric acid,60℃ of water temperature, 12- 24 hours of soaking time, 1 - 2 hours ultrasound and O. 2 mol/L of concentration of EDTA. Under the optimized condition, the impurities elements in the ion membrane are almost completely removed. The ion membrane capacity （IEC） of the regenerated ion membrane can reach up to 80% -85% of the new one. The SEM results show that,there are many holes detected on the membrane. It requires to be regenerated for further application. The perfluo-sulfonate acid ionic membrane after chemical regeneration can be recyclable for perfluo-sulfonic acid resin.
出处
《现代化工》
CAS
CSCD
北大核心
2012年第7期77-80,共4页
Modern Chemical Industry
关键词
正交优选法
废弃全氟磺酸离子膜
离子交换容量(IEC)
化学再生
orthogonal optimization method
waste perfluo-sulfonate ion membrane
ion exchange capacity （IEC）
chemical regeneration
