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首页> 外文期刊>Journal of Applied Polymer Science >Effect of the Preparation Conditions on the Morphology and Performance of Poly(imide) Hollow Fiber Membranes
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Effect of the Preparation Conditions on the Morphology and Performance of Poly(imide) Hollow Fiber Membranes

机译：制备条件对聚酰亚胺中空纤维膜形态和性能的影响

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摘要

Poly(imide) (PI) hollow fiber membranes were prepared by using classical phase inversion process. Effects of different external coagulation bath temperatures (ECBT) and various bore flow rates (BFR) on the morphology and separation performance of the membranes were studied. Cross-section, inner and outer structures were characterized by using scanning electron microscope and atomic force microscopy (AFM). Mean pore size, pore size distribution, and mean roughness of the PI hollow fibers surfaces were estimated by AFM. It was found that the hollow fibers morphology composed of sponge-like and finger-like structures with different ECBT and BFR. A circular shape of the nodules with different sizes was observed in the outer surface of the PI hollow fibers. Mean pore size of the outer surface increases with increasing ECBT and BFR. The important result observed in this study is that the ECBT clearly has the largest effect on hollow fiber PI membrane roughness compared with the BFR. Pure water permeability of the PI hollow fibers was improved with increase of ECBT and BFR. The solute rejection (R%) was reduced when the ECBT and BFR was increased.
机译：采用经典的相转化法制备了聚酰亚胺（PI）中空纤维膜。研究了不同的外部凝固浴温度（ECBT）和不同的孔流速（BFR）对膜的形态和分离性能的影响。通过使用扫描电子显微镜和原子力显微镜（AFM）来表征横截面，内部和外部结构。通过AFM估算PI中空纤维表面的平均孔径，孔径分布和平均粗糙度。结果发现，中空纤维的形态由具有不同ECBT和BFR的海绵状和手指状结构组成。在PI中空纤维的外表面观察到圆形的大小不同的结节。外表面的平均孔径随ECBT和BFR的增加而增加。在这项研究中观察到的重要结果是，与BFR相比，ECBT对中空纤维PI膜的粗糙度影响最大。 PI中空纤维的纯水渗透率随ECBT和BFR的增加而提高。当ECBT和BFR增加时，溶质截留率（R％）降低。

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