常壓電漿製備含三級與四級氨官能基團的抗菌自潔淨聚四氟乙烯薄膜之研究

Antibacterial Self-cleaning Expanded Poly(tetrafluoroethylene) Membranes Grafted with Tertiary and Quaternary Amino Groups by Dielectric Barrier Discharge Atmospheric Plasma

廖庭郁(TING-YU LIAO)

指導教授 ： 魏大欽 ； 張雍

中原大學/工學院/化學工程學系/碩士(2022年)

https://doi.org/10.6840/cycu202201125

摘要

隨著排放廢水的法規越來越嚴謹以及人們對水的重視，在廢水處理過程中加入薄膜過濾製程，並結合傳統生物反應與薄膜過濾的薄膜生物反應系統。當使用薄膜生物反應器過濾時，薄膜會因為細菌與微生物附著在薄膜表面而造成薄膜孔洞堵塞失效，然而必須更換薄膜造成成本大幅提升。本研究以常壓輝光介電質放電的電漿系統(Line Source DBD Plasma System)接枝甲基丙烯酰氧乙基三甲基氯化铵((2-(Methacryloyloxy)ethyl) trimethylammonium chloride solution，TMAEMA)和甲基丙烯酸(2-二甲胺乙酯)(2-(Dimethylamino)ethyl methacrylate，DMAEMA)於聚四氟乙烯 ePTFE(Expanded Polytetrafluoroethylene)薄膜製備兩種可殺菌薄膜。
利用接觸角量測儀(WCA)、掃描式電子顯微鏡(SEM)、傅立葉轉換紅外線光譜儀(FTIR)、X射線光電子能譜儀(XPS)、界達電位量測儀(Zeta)等儀器分析表面的物化性質，以細菌貼附/脫附實驗探討三級胺與四級胺對於細菌的殺菌效果和六偏磷酸鈉溶液對於三級胺與四級銨的表面作用行為。
研究發現使用電漿改質可以快速地將高分子接枝於聚四氟乙烯薄膜，改變常壓電漿掃描次數製備不同接枝密度的薄膜，兩種電漿改質薄膜都具有殺菌效果，使用六偏磷酸鈉(SHMP)溶液反洗可破壞正電ePTFE-g-PTMAEMA薄膜表面與死細菌間的靜電作用力並且與帶正電表面有強水合層使死細菌從薄膜上脫附。而ePTFE-g-PDMAEMA薄膜表面不帶電因此沒辦法與六偏磷酸鈉(SHMP)溶液形成強水合層使死細菌從薄膜上脫附。在過濾過程中廢水與電漿改質薄膜接觸細菌可以被殺死，降低了廢水中的細菌量。

關鍵字

廢水過濾 ； 電漿表面改質 ； 三級胺 ； 四級胺 ； 殺菌/脫菌

並列摘要

As the regulations on wastewater discharge become more and more stringent and people pay more attention to water, a membrane filtration process is added to the wastewater treatment process, and a membrane biological reaction system combining traditional biological reactions and membrane filtration is used. When membrane bioreactors are used for filtration, membrane Because bacteria and microorganisms adhere to the surface of the film, the pores of the film will be blocked, and the cost of replacing the film will be greatly increased. In this study, two kinds of bactericidal films were prepared by grafting (2-(Methacryloyloxy)ethyl) trimethylammonium chloride(TMAEMA) and (2-(Dimethylamino)ethyl) methacrylate(DMAEMA) onto Expanded Polytetrafluoroethylene(ePTFE) films using Line Source DBD Plasma System.
The study found that the use of plasma modification can quickly graft the polymer to the ePTFE membrane, and the films with different graft densities can be prepared by changing the number of atmospheric-pressure plasma scans. Both plasma-modified membrane have bactericidal effects. Washing with SHMP solution can regenerate the positively charged ePTFE-g-PTMAEMA film and can sterilize/sterilize for multiple cycles. After washing with SHMP solution, the electrostatic force between the film and dead bacteria will be destroyed and there will be strong hydration with the positively charged surface. The surface of the ePTFE-g-PDMAEMA film is not charged, so there is no way to form a strong hydration layer to desorb the dead bacteria. During the filtration process, the wastewater and the plasma-modified film contact the bacteria to be killed, reducing the Bacterial population in wastewater.

參考文獻

[1] C. J.Huang, Y. S.Chen, and Y.Chang, “Counterion-activated nanoactuator: Reversibly switchable killing/releasing bacteria on polycation brushes,” ACS Appl. Mater. Interfaces, vol. 7, no. 4, pp. 2415–2423

[2] T.Oki and S.Kanae, “Global hydrological cycles and world water resources,” Science (80-. )., vol. 313, no. 5790, pp. 1068–1072

[3] S. L.Postel, G. C.Daily, and P. R.Ehrlich, “Human Appropriation of Renewable Fresh Water,” Science (80-. )., vol. 271, no. 5250, pp. 785–788

[4] M.Shatat and S. B.Riffat, “Water desalination technologies utilizing conventional and renewable energy sources,” Int. J. Low-Carbon Technol., vol. 9, no. 1, pp. 1–19

[5] E. O.Ezugbe and S.Rathilal, “Membrane Technologies in Wastewater Treatment: A Review,” Membr. 2020, Vol. 10, Page 89, vol. 10, no. 5, p. 89