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Effects of Tri-n-octylamine with or without Diluents on Microporous Ethylene Chlorotrifluoroethylene Membranes
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2017-08-16 00:00:00 , DOI: 10.1021/acs.iecr.7b01839
Na Yao 1 , Boris Khusid 1 , Kamalesh K. Sirkar 1 , Derek J. Dehn 2
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2017-08-16 00:00:00 , DOI: 10.1021/acs.iecr.7b01839
Na Yao 1 , Boris Khusid 1 , Kamalesh K. Sirkar 1 , Derek J. Dehn 2
Affiliation
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Microporous ethylene chlorotrifluoroethylene (ECTFE) membranes are expected to become industrially useful. Its solvent resistance is important in applications involving solvent microfiltration, organic synthesis, and membrane solvent extraction (MSX). Recent characterizations of microporous ECTFE membrane after exposure to different liquid media and radiation, indicated that pure tri-n-octylamine (TOA) does have some effect. However, it is used in MSX with diluents, e.g., xylene. Therefore, many material and porous-structure characterization techniques and dead-end microfiltration were employed to study solvent-treatment effects on ECTFE membranes exposed to ethanol, xylene, xylene80/TOA20, and pure TOA. Membrane-surface roughness of virgin, ethanol-soaked, and TOA-soaked membranes indicated TOA-soaked membranes were the roughest, followed by ethanol-soaked and virgin ones. Bubble-point-pressure based maximum pore diameters (dmax) of solvent-treated membranes were: dmax,TOA > dmax,Xylene/TOA > dmax,Xylene > dmax,Ethanol > dmax,Virgin. In dead-end microfiltration, fouling mechanisms behaved differently for virgin and TOA-soaked membranes; filtrate particle size distributions agreed well with estimated pore sizes. Additional characterizations indicated the limited effect of ethanol and xylene; however, TOA-soaked membrane behaved differently. In FTIR and Raman spectra, TOA introduced extra peaks indicating contributions from C–H stretching and deformation. Raman spectra of xylene80/TOA20-soaked membrane were a combination of those of xylene and TOA.
中文翻译：
三叔的影响ñ -octylamine通过或者不通过微孔乙烯三氟氯乙烯膜稀释剂
预计微孔乙烯氯三氟乙烯（ECTFE）膜将在工业上变得有用。其耐溶剂性在涉及溶剂微滤，有机合成和膜溶剂萃取（MSX）的应用中很重要。暴露于不同的液体介质和辐射后的微孔膜ECTFE的最近表征，表明纯三Ñ-辛胺（TOA）确实有一定作用。但是，它与稀释剂（例如二甲苯）一起用于MSX。因此，采用了许多材料和多孔结构表征技术以及末端微滤技术来研究溶剂处理对暴露于乙醇，二甲苯，二甲苯80 / TOA20和纯TOA的ECTFE膜的影响。原始，乙醇浸透和TOA浸透膜的膜表面粗糙度表明，TOA浸透膜最粗糙，其次是乙醇浸透和原始浸透的膜。溶剂处理过的膜的基于泡点压力的最大孔径（d max）为：d max，TOA > d max，二甲苯/ TOA > d max，二甲苯> d max，乙醇>d max，处女。在死角微滤中，原始膜和TOA浸透膜的结垢机制表现不同；滤液的粒径分布与估计的孔径非常吻合。其他特征表明乙醇和二甲苯的作用有限。但是，TOA浸泡的膜的行为有所不同。在FTIR和拉曼光谱中，TOA引入了额外的峰，表明CH拉伸和变形的贡献。二甲苯80 / TOA20浸泡过的膜的拉曼光谱是二甲苯和TOA的组合。
更新日期：2017-08-16
中文翻译：
三叔的影响ñ -octylamine通过或者不通过微孔乙烯三氟氯乙烯膜稀释剂
预计微孔乙烯氯三氟乙烯（ECTFE）膜将在工业上变得有用。其耐溶剂性在涉及溶剂微滤，有机合成和膜溶剂萃取（MSX）的应用中很重要。暴露于不同的液体介质和辐射后的微孔膜ECTFE的最近表征，表明纯三Ñ-辛胺（TOA）确实有一定作用。但是，它与稀释剂（例如二甲苯）一起用于MSX。因此，采用了许多材料和多孔结构表征技术以及末端微滤技术来研究溶剂处理对暴露于乙醇，二甲苯，二甲苯80 / TOA20和纯TOA的ECTFE膜的影响。原始，乙醇浸透和TOA浸透膜的膜表面粗糙度表明，TOA浸透膜最粗糙，其次是乙醇浸透和原始浸透的膜。溶剂处理过的膜的基于泡点压力的最大孔径（d max）为：d max，TOA > d max，二甲苯/ TOA > d max，二甲苯> d max，乙醇>d max，处女。在死角微滤中，原始膜和TOA浸透膜的结垢机制表现不同；滤液的粒径分布与估计的孔径非常吻合。其他特征表明乙醇和二甲苯的作用有限。但是，TOA浸泡的膜的行为有所不同。在FTIR和拉曼光谱中，TOA引入了额外的峰，表明CH拉伸和变形的贡献。二甲苯80 / TOA20浸泡过的膜的拉曼光谱是二甲苯和TOA的组合。
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