1673-159X

CN 51-1686/N

聚乙烯醇/聚二甲基二乙烯氯化铵阴离子自立交换膜的制备与性能

Preparation and Properties of PVA/PDADMAC Anion Exchange Self-stand Membrane

  • 摘要: 以5种不同聚乙烯醇/聚二甲基二乙烯氯化铵配比制备了用于电透析脱盐的阴离子自立交换膜, 并考察3种不同热处理温度对膜含水率、膜电荷密度、真实迁移数及膜面电阻的影响。实验结果表明: 膜的含水率随聚二甲基二乙烯氯化铵含量CPC的增加而增加, 随热处理温度的增加而降低; 在CPC为30 wt%, 热处理温度为180℃时, 阴离子交换膜的膜面电阻最低, 为3.04 Ω cm2; 在CPC为30 wt%, 热处理温度为180℃时, 阴离子交换膜的真实迁移数达到0.99;在CPC为20 wt%, 热处理温度为180℃时, 阴离子交换膜的膜电荷密度值为1.14 mol dm-3

     

    Abstract: In this paper five different proportions of PVA/PDADMAC were used to prepare self-stand anion exchange membranes by using electrodialysis method. Also the effect of three different annealing temperatures on the performance parameters of the membrane, which were water content, charge density, dynamic transport number and membrane resistance, was investigated. The experimental results show that the water content of the membrane increases with PDADMAC content, CPC, and decreases with the annealing temperature. The membrane resistance reaches the lowest value, 4.46Ω cm2 when CPC and the annealing temperature is 30wt% and is 180 ℃, respectively. The dynamic transport number of the membrane is 0.99 when CPC is 30wt% and the annealing temperatures is 180℃. The maximum charge density of the membrane is 1.14 mol dm-3 when CPC and the annealing temperatures is 20wt% and 180 ℃, respectively.

     

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