膜
甲基丙烯酸
聚乙烯
热稳定性
化学
扩散
碱金属
离子交换
高分子化学
聚合
单体
化学工程
材料科学
核化学
聚合物
离子
有机化学
工程类
物理
热力学
生物化学
作者
Farui Chong,Congwei Wang,Jibin Miao,Ru Xia,Ming Cao,Peng Chen,Bin Yang,Wei Zhou,Jiasheng Qian
标识
DOI:10.1016/j.jtice.2017.06.043
摘要
Cation-exchange membranes for diffusion dialysis (DD) were prepared by selecting chlorosulfonated polyethylene (CSM) and methacrylic acid (MAA) as framework and functional monomer, respectively. An interpenetrating network structure (IPN) was formed by free radical polymerization and consequent crosslinking reaction. The membranes possessed ion exchange capacities (IECs) of 1.98–3.12 mmol/g, water uptake (WR) of 12.7–34.8%, swelling degree of 72.7–170% as well as favorable thermal stability and alkali resistance (almost zero mass loss in hot alkali solution). The membranes were applied for DD process to recover alkali from NaOH/Na2WO4 system at 25 °C and 65 °C. Results indicated that coefficients for OH− (UOH) were in the range of 0.0015–0.018 m/h and separation factors (S) were in the range of 9–33 at 25 and 65 °C, respectively.
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