常壓電漿接枝與紫外光接枝雙離子性材料於高分子薄膜改質之比較研究

本研究嘗試利用電漿與紫外光對聚丙烯膜材進行接枝聚硫代甜菜鹼，製備出含兩性離子特性之仿生薄膜，期望能有效減少蛋白質貼附的現象。各改質處理後的膜材利用水接觸角、全反射式傅立葉轉換紅外線光譜儀、掃描式電子顯微鏡、X射線光電子能譜儀分析表面化學與物理特性，再進行蛋白質吸附及細菌貼附測試，瞭解膜材抗生物沾黏之效果。除比較上述兩種改質方法外，並探討電漿接枝之主因是電漿反應物種還是紫外光所造成，因此在電漿改質膜材中覆蓋石英玻璃，以隔絕電漿反應物種，探討電漿紫外光造成之影響。實驗結果發現不論是電漿改質、電漿紫外光改質與紫外光改質，皆能成功接枝聚硫代甜菜鹼於聚丙烯膜材上，PP-g-SBMA改質膜材，經由XPS發現各改質，隨著改質時間增加，N與S含量也有增加，XPS細掃後觀察，各改質也隨改質時間增加N1s/S2p保有度也越好，生物分子沾黏實驗中，電漿改質90秒與紫外光改質60分鐘，皆能有效抵抗相反電性的蛋白質吸附以及減少大部分細菌的貼附，紫外光改質於BSA蛋白循環測試有88.7%的水通量恢復效能，電漿改質也有87.3%水通量恢復效能，具備可利用性的價值。

關鍵字

常壓電漿；紫外光改質；兩性離子；抗生物沾黏膜材

並列摘要

In this research, we compared the atmospheric-pressure dielectric barrier discharge (APDBD) plasma grafting with the UV-induced grafting in the surface modification of membranes. Sulfobetaine (SBMA) was grafted from the polypropylene membrane (PP) in order to reduce bio-fouling. The functional groups of the monomer SBMA are positive charge (N+(CH3)3) and negative charge (SO3-). The chemical composition and surface morphology of the modified PP membranes were characterized by FTIR-ATR, SEM, and XPS. In addition, the anti-biofouling capabilities of preparing membranes were characterized by the protein adsorption of bovine serum albumin (BSA) and lysozyme (LY). The antibacterial property was tested via attachment ability with Escherichia coli. Finally, cyclic filtration test was done in BSA solution for bio-separation application. Moreover, to investigate whether the main factor of plasma grafting was reactive species or UV radiation from plasma, we covered the membrane with quartz plate to inhibit the reaction between reactive plasma species with membrane and discussed the effect of UV from plasma to the grafting of SBMA on PP. Both methods, UV treatment at 60 min and APDBD treatment at 90s, showed significant anti-biofouling capability. The PP-g-SBMA membranes by UV treatment and APDBD were found to effectively resist protein adsorption and exhibit a very low bio-fouling characteristic during cyclic-filtration. Flux recovery of water (FRwi) in UV treated and APDBD treated are 88.7% and 87.3%, respectively.

並列關鍵字

DBD ； UV-grafting ； zwitterionic polymer ； anti-biofouling membrane

參考文獻

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[2] Z. Xin, S. Yan, J. Ding, Z. Yang, B. Du, and S. Du, "Surface modification of polypropylene nonwoven fabrics via covalent immobilization of nonionic sugar-based surfactants," Applied Surface Science, vol. 300, pp. 8-15, 2014.

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常壓電漿接枝與紫外光接枝雙離子性材料於高分子薄膜改質之比較研究

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