2023-01-012024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/659175在本計畫中，我們將採用介觀尺度模擬方法來研究透過非溶劑誘導相分離（NIPS），熱誘導相分離（TIPS）或兩者結合（N-TIPS）的方法之膜形成的過程。此膜是由PVDF均聚物，PVDF聚合物共混物或PVDF基共聚物所形成的。細觀結構的動態演變和膜不對稱的程度將受到監測。我們將系統性地研究溶劑在非溶劑中的溶解度、聚合物在非溶劑中的不溶性以及反溶劑的溫度對膜形態的影響。此外，我們亦將研究聚合物長度、初始聚合物濃度、聚合物的多分散性和聚合物的結構對相分離速率的影響。最後，我們將討論造成這些現象的可能機制。通常較粗糙的表面與較低的接觸角和較高的界面曲率有關，而為了減輕膜蒸餾應用中的膜結垢現象以改善水通量，我們打算量化膜表面粗糙度和潤濕性之間的關係。這項研究的結果可以與機器學習整合，從而讓我們對膜形成有深刻而全面的理解，而有助於聚合物膜的製備及其在城市污水和工業廢水循環利用中的應用。 In this project, a mesoscale simulation method will be employed to explore the membrane formation process through nonsolvent induced phase separation (NIPS), thermal induced phase separation (TIPS), or the combination of both (N-TIPS). The membranes can be formed by PVDF homopolymers, PVDF polymer blends, or PVDF-based copolymers. The dynamic evolutions of the meso-structure and the extent of membrane asymmetricity will be monitored. The effects of solubility of solvent in the nonsolvent, insolubility of the polymer in the nonsolvent, and temperature of the anti-solvent on the membrane morphology will be systematically investigated. Moreover, the influences of the polymer length, initial polymer concentration, polydispersity of the polymer, and architecture of the polymer on the phase separation rate will be studied. Finally, possible mechanisms responsible for these consequences will be discussed. Also, in general, rougher surfaces are associated with lower contact angles and higher interfacial curvatures. To mitigate membrane scaling in the application of membrane distillation or to improve the water flux, we intend to quantify the relationship between membrane surface roughness and wettability. The outcomes of this study can be incorporated into Machine Learning to provide us with the prediction ability for future membrane applications and a deep and comprehensive understanding of the membrane formation. Therefore, this subproject has the potential to be helpful to the polymeric membrane preparation and the corresponding application in municipal sewage and industry wastewater for water recycling.介觀尺度模擬方法; PVDF基的共聚物; 非溶劑誘導相分離; 熱誘導相分離; 潤濕性質;mesoscale simulation method; PVDF-based copolymers; nonsolvent induced phase separation; thermal induced phase separation; wetting properties