Preparation of poly(phthalazinone ether sulfone ketone) asymmetric ultrafiltration membrane: II. The gelation process
Preparation of poly(phthalazinone ether sulfone ketone) asymmetric ultrafiltration membrane: II. The gelation process
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聚二氮杂萘酮醚砜酮不对称超滤膜的制备：二．
DOI：
10.1016/j.memsci.2005.06.011
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发表时间：
2006-01
影响因子：
9.5
通讯作者：
Han,B.
中科院分区：
文献类型：
--
作者：
Chen,C.;Li,J.;Sun,B.;Qin,P.;Takuji,S.;Han,B.
对湿法相转化法制备新型含二氮杂萘酮结构聚芳醚砜酮（PPESK）非对称膜的成膜动力学进行了研究。利用在线光学显微镜-CCD摄像实验系统对膜的形态进行了观察。测量了降水锋运动X。X ~ 2值与凝胶化时间t之间存在三种不同的线性关系。这一观察结果与普遍接受的结论不同，该结论假定在整个凝胶化过程中X2和t之间存在单一线性相关性。与膜的形态演变相比，认识到这三个相关性对应于三个连续的凝胶化步骤：顶层的形成、过渡层的形成和支撑层的形成。研究了PEG 1000和Tween 80两种添加剂对膜形成动力学和膜通量的影响。本研究结果可为进一步了解非对称膜的形成过程提供依据。
Formation kinetics of the poly(phthalazinone ether sulfone ketone) (PPESK) asymmetric membrane via wet phase-inversion process has been studied experimentally. The membrane morphology has been observed using an online optical microscope–CCD camera experimental system. The precipitation front movement, X, has been measured. Three different linear correlations between the value of X2and the gelation time, t, have been identified. This observation is different from a commonly accepted conclusion which assumed a single linear correlation between X2and t for the whole gelation process. Compared to the morphology evolution of the membrane, it is realized that these three correlations correspond to the three consecutive gelation steps: formation of the top layer, formation of the transition layer and formation of the support layer. The effect of two additives, PEG1000 and Tween80, on the formation kinetics as well as the membrane flux has also been studied. The results present here may provide better understanding of the asymmetric membrane formation process.
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