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首页> 外文期刊>RSC Advances >Effect of volatile solvent and evaporation time on formation and performance of PVC/PVC-g-PEGMA blended membranes
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Effect of volatile solvent and evaporation time on formation and performance of PVC/PVC-g-PEGMA blended membranes

机译：挥发性溶剂和蒸发时间对PVC / PVC-G-PEGMA混纺膜形成和性能的影响

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In order to further improve the performances of fabricated PVC/PVC-graft-poly(ethylene glycol) methyl ether methacrylate (PVC/PVC-g-PEGMA) blended membranes, we investigated the inner connections between affecting parameters during preparation and membrane performances. Two parameters including the composition of casting solutions and the solvent evaporation time were selected. In this study, PVC/PVC-g-PEGMA blended membranes were prepared by non-solvent induced phase separation (NIPS) using 1-methyl-2-pyrrolidinone (NMP) and tetrahydrofuran (THF) as mixing solvents. We found that (1) the membrane morphologies like surface pore size and porosity decreased as the ratio of THF to NMP increased, which resulted in the decrease in pure water flux and the increase of sodium alginate (SA) rejection ratio; (2) the presence of THF in the casting solution could significantly lower the membrane surface roughness compared to only using NMP as a solvent; (3) solvent evaporation for an appropriate time increased the hydrophilicity of the membrane. Among these findings, we achieved a membrane exhibiting the highest flux recovery ratio of 98.65 +/- 0.85% with a mixing ratio of 1 : 9 (THF : NMP) at 60 s of evaporation time. High pollutant rejection and high flux recovery ratio were achieved. This study provides more insight into the PVC/PVC-g-PEGMA membrane and a more flexible approach to the application of PVC membranes.
机译：为了进一步改善制造的PVC / PVC-移植 - 聚（乙二醇）甲基醚甲基丙烯酸甲酯（PVC / PVC-G-PEGMA）混合膜的性能，我们研究了在制备和膜性能期间影响参数之间的内部连接。选择包括浇铸溶液组成和溶剂蒸发时间的两个参数。在该研究中，使用1-甲基-2-吡咯烷酮（NMP）和四氢呋喃（THF）作为混合溶剂，通过非溶剂诱导的相分离（NMP）制备PVC / PVC-G-G-PEGMA混合膜。我们发现（1）如表面孔径和孔隙率，随着THF至NMP的比例增加，膜形态降低，导致纯净水通量的降低和藻酸钠（SA）排斥比的增加; （2）与仅使用NMP作为溶剂相比，浇铸溶液中THF的存在可显着降低膜表面粗糙度; （3）溶剂蒸发适当的时间增加了膜的亲水性。在这些发现中，我们实现了一种膜，其具有98.65 +/- 0.85％的最高助熔剂回收率，在蒸发时间60秒时的混合比为1：9（THF：NMP）。实现了高污染物排斥和高通量回收率。该研究提供了对PVC / PVC-G-PEGMA膜的更多洞察力和更灵活的PVC膜应用方法。

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    《RSC Advances》 |2019年第59期|共10页
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  • 正文语种 eng
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