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首页> 外文期刊>Journal of Applied Polymer Science >Nonequilibrium nanoblend membranes for the pervaporation of benzene/cyclohexane mixtures
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Nonequilibrium nanoblend membranes for the pervaporation of benzene/cyclohexane mixtures

机译：非平衡纳米混纺膜，用于苯/环己烷混合物的全蒸发

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Immiscible blends of polymers were cast from solution, and the rate of evaporation was controlled relative to the rate of phase separation to produce different morphologies; upon crosslinking, stable nonequilibrium nanobtends were realized. This process of forced assembly produced useful membrane materials that could be designed for solubility selectivity with the group contribution methodology. Crosslinked ternary blends of nitrile butadiene rubber (NBR), poly(methyl methacrylate) (PMMA), and a tercopolymer of ethylene oxide/epichlorohydrin/allyl glycidyl ether (Hydrin) were examined for use in the separation of benzene from cyclohexane by pervaporation. For a 50 : 50 wt % benzene/cyclohexane feed, blend 811 (containing 80 wt % NBR, 10 wt % Hydrin, and 10 wt % PMMA) gave a separation factor of 7.3 and a normalized flux of 28 kg mu m/m(2) h; such a performance is unmatched in the literature; with the flux being very high for the reported separation factor. Among the samples tested, the flux of the membrane increased as the amount of NBR in the ternary blend decreased; however, the separation factor was not largely affected. Blended samples showed no sign of deformation after 48 h at the operating temperature as compared to pure NBR, which did show evidence of creep. (C) 2008 Wiley Periodicals, Inc.
机译：从溶液中浇铸不混溶的聚合物共混物，并控制蒸发速率相对于相分离速率以产生不同的形态。通过交联，实现了稳定的非平衡纳米债券。强制组装的过程产生了有用的膜材料，该膜材料可通过基团贡献方法进行溶解度选择性设计。研究了丁腈橡胶（NBR），聚甲基丙烯酸甲酯（PMMA）和环氧乙烷/环氧氯丙烷/烯丙基缩水甘油醚（水合蛋白）的三元共聚物的交联三元共混物，用于通过全蒸发从环己烷中分离苯。对于50:50 wt％的苯/环己烷进料，共混物811（包含80 wt％的NBR，10 wt％的Hydrin和10 wt％的PMMA）的分离系数为7.3，归一化通量为28 kg mu m / m（ 2）h;这种性能在文献中是无与伦比的;对于报告的分离因子而言，通量非常高。在测试的样品中，随着三元混合物中NBR含量的减少，膜通量增加。但是，分离因子的影响不大。与纯NBR相比，混合样品在工作温度下48 h后没有显示出变形的迹象，后者确实显示出蠕变的迹象。 （C）2008 Wiley期刊公司

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