高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (S1): 318.

• Chemistry in Materials Sciences • 上一篇    下一篇

Water-alcohol Separation by Pervaporation through Zeolite Modified Poly(amidesulfonamide)s (PASAs)

HE Xu-Min1, CHEN Wing-Hong2, NG Ching-Fai2   

  1. 1. Department of Material Science, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005;
    2. Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong
  • 出版日期:2000-12-31 发布日期:2000-12-31

Water-alcohol Separation by Pervaporation through Zeolite Modified Poly(amidesulfonamide)s (PASAs)

HE Xu-Min1, CHEN Wing-Hong2, NG Ching-Fai2   

  1. 1. Department of Material Science, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005;
    2. Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong
  • Online:2000-12-31 Published:2000-12-31

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摘要：

A series of poly(amidesulfonamide)s (PASAs) which have been synthesized in our laboratory possess good membrane fabrication properties[1]. The potential use of these membrane materials in RO, UF and PV were demonstrated[2,3]. Reminiscent to the PV performance of other glassy polymers, most of these materials exhibit a fairly high separation factor albeit a permeation flux below 35 g m-2 h-1 in the PV separation of aqueous alcohol mixtures. To have a real application prospect in PV, the permeation flux through the membranes has to e further improved. The present work represents our effort to upgrade the separation characteristics of PASAs by blending with inert hydrophilic zeolites. Three types of PASAs (structure shown in Figure 1) were selected to be fabricated by blending different amount of zeolite NaA or NaX. The zeolite filled membranes were characterized by SEM, IR spectroscopy, sorption measurements and wide-angle X-ray diffraction. By adding proper amount of NaA into the polymer casting solutions, the resultant zeolite filled membranes exhibited improvement in both selectivity and permeability in the separation of 10% aqueous solutions of ethanol, propan-l-ol and propan-2-ol, as compared to the zeolite free membrane (Table 1).

Abstract:

A series of poly(amidesulfonamide)s (PASAs) which have been synthesized in our laboratory possess good membrane fabrication properties[1]. The potential use of these membrane materials in RO, UF and PV were demonstrated[2,3]. Reminiscent to the PV performance of other glassy polymers, most of these materials exhibit a fairly high separation factor albeit a permeation flux below 35 g m-2 h-1 in the PV separation of aqueous alcohol mixtures. To have a real application prospect in PV, the permeation flux through the membranes has to e further improved. The present work represents our effort to upgrade the separation characteristics of PASAs by blending with inert hydrophilic zeolites. Three types of PASAs (structure shown in Figure 1) were selected to be fabricated by blending different amount of zeolite NaA or NaX. The zeolite filled membranes were characterized by SEM, IR spectroscopy, sorption measurements and wide-angle X-ray diffraction. By adding proper amount of NaA into the polymer casting solutions, the resultant zeolite filled membranes exhibited improvement in both selectivity and permeability in the separation of 10% aqueous solutions of ethanol, propan-l-ol and propan-2-ol, as compared to the zeolite free membrane (Table 1).

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