LIQUID-LIQUID PHASE SEPARATION IN MULTICOMPONENT POLYMER SYSTEMS .10. CONCENTRATION DEPENDENCE OF PAIR INTERACTION PARAMETER IN SYSTEM CYCLOHEXANE-POLYSTYRENE
LIQUID-LIQUID PHASE SEPARATION IN MULTICOMPONENT POLYMER SYSTEMS .10. CONCENTRATION DEPENDENCE OF PAIR INTERACTION PARAMETER IN SYSTEM CYCLOHEXANE-POLYSTYRENE
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DOI：
10.1021/ma60023a026
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发表时间：
1971-01-01
期刊：
影响因子：
5.5
通讯作者：
KLEINTJENS, LA
中科院分区：
文献类型：
--
作者：
KONINGSVELD, R;KLEINTJENS, LA
结论表V中总结了所述膜系统的典型通量截留率数据，以及各种进料溶液。这些芳香族聚酰胺膜的特征在于其良好的机械强度，如图7所示。本文比较了聚合物Ⅰ和醋酸纤维素的通量-压力响应。在1800 psi的压力下观察到通量的直线图，1小时后明显偏离线性。乙酸纤维素通量线的偏转与截留率的降低一致，表明膜缺陷的发展。由这些聚合物制备的不对称膜的典型机械性能示于表VI中。除了良好的机械性能外，这些芳香族聚酰胺还具有出色的耐化学性，尤其是在高pH值范围内。这与醋酸纤维素系统形成鲜明对比。用于水性盐截留的膜反渗透率在1A的H2SO 4、HCl、HNO 3、CH 3COOH、NaOH和NH 4 OH溶液中储存1周后似乎没有改变。这些膜对NaCl以外的溶质的选择性相当好，如表VII.致谢中聚合物III的结果所示。作者要感谢J. R。霍尔斯滕先生协助制备了本研究中使用的聚合物。L. C. Locust和P. B.伍德森和N夫人Wildman对他们在进行所述测量方面的贡献表示感谢。另外还要感谢VF Holland博士在进行电子显微镜检查时提供的协助。这项工作是根据美国盐水办公室膜部门授予的合同号14-01-0001-1720进行的。S.内政部。
ConclusionsTypical flux-rejection data for the membrane systems de-scribed, with various feed solutions, are summarized in Table V. These aromatic polyamide membranes are characterized by their good mechanical strength, as illustrated in Figure 7. Here a comparison of flux-pressure response between polymer I and celluloseacetate is made. A straight line plot for flux is observed up to pressures of 1800 psi, with some departure from linearity evident after 1 hr. The deflection in the flux line for celluloseacetate is seen to coincide with a decrease in rejection, indicating development of a membrane defect. Typical mechanical properties for asymmetric membranes prepared from these polymers are shown in Table VI. In addition to their good mechanical properties, these aromatic polyamides show remarkable chemical resistance, especially in the high-pH range. This is in marked contrast to the cellulose acetate systems. 1 23456789 Membrane reverse osmosis per-formance for aqueous salt rejections appears unaltered after 1 week of storage in 1 A solutions of H2S04, HC1, HNOs, CHsCOOH, NaOH, andNH4OH. Selectivity of these membranes to solutes other than NaCl is quite good, as illustrated by results for polymer III in Table VII.Acknowledgments. The authors wish to thank Dr. J. R. Holsten for his assistance in preparing the polymers used in this study andMessrs. L. C. Locust and P. B. Woodson and Mrs. N. Wildman for their contributions in carrying out the measurements described. Additional thanks are due Dr. VF Holland for his assistance in carrying out the electron microscopy. This work was carried out under Contract No. 14-01-0001-1720 granted by the Office of Saline Water, Membrane Division, U. S. Department of the Interior.