Nanodiamond-modified polyamide evaporation membranes for separating methanol-methyl acetate mixtures
Nanodiamond-modified polyamide evaporation membranes for separating methanol-methyl acetate mixtures
复制标题
用于分离甲醇-乙酸甲酯混合物的纳米金刚石改性聚酰胺蒸发膜
DOI：
10.1134/s0965544115040039
复制
发表时间：
2015
影响因子：
1.4
通讯作者：
G. Polotskaya
中科院分区：
文献类型：
--
作者：
N. Avagimova;A. Toikka;G. Polotskaya
采用固相分散法制备了爆轰纳米金刚石（ND）颗粒改性的聚对苯二甲酰亚胺（PA）膜。使用吸附和渗透蒸发方法研究了含有高达5wt% ND的致密膜在甲醇和乙酸甲酯传质过程中的传输性能。结果表明，由于ND粒子在PA基体中的掺入，膜的吸附-扩散特性得到改善。甲醇-乙酸甲酯混合物的渗透汽化的实验数据已被用来计算的经典参数通量和分离因子，并确定渗透性和选择性，特征驱动力归一化性能的测试膜渗透剂系统。最高的通量和分离因子值已获得的膜含有3重量%的ND。已经发现，膜渗透剂系统的特征性质促进使用PA/ND膜的甲醇-乙酸甲酯混合物的选择性传质。
Poly(phenylene isophthalamide) (PA) membranes modified with detonation nanodiamond (ND) particles have been prepared by solid-phase dispersion of powders of the components. The transport properties of dense film membranes containing up to 5 wt % ND have been studied in the methanol and methyl acetate mass transfer processes using the sorption and pervaporation methods. It has been shown that the sorption-diffusion characteristics of the membranes are improved owing to the incorporation of ND particles in the PA matrix. The experimental data on the pervaporation of a methanol-methyl acetate mixture have been used to calculate the classical parameters flux and separation factor and determine permeability and selectivity, characteristic driving force-normalized properties of the test membrane-penetrant system. The highest flux and separation factor values have been obtained for a membrane containing 3 wt % ND. It has been found that the characteristic properties of the membrane-penetrant system facilitate selective mass transport of a methanol-methyl acetate mixture using PA/ND membranes.