本文選題：雙極膜　切入點：氧化石墨烯　出處：《北京化工大學》2015年碩士論文　論文類型：學位論文

【摘要】：雙極膜是新型復合膜,通過反向電壓,水在雙極膜的界面層發(fā)生分解,分解生成了H+和OH-并通過陽、陰膜遷移到溶液中。此工藝過程簡單,廢物排放少,因此雙極膜技術(shù)已成為近年來的研究熱點,這為解決化工污染、環(huán)境、食品工程等技術(shù)帶來了新的突破點,雙極膜技術(shù)在國外應(yīng)用已經(jīng)很廣泛,但是國內(nèi)由于制備雙極膜的成本高且電阻大,導致雙極膜在國內(nèi)應(yīng)用仍有所限制,所以研究出低水解離電壓、穩(wěn)定性強的雙極膜已經(jīng)成為了近年來雙極膜技術(shù)研究熱點。本論文利用了噴涂法制膜和將氧化石墨烯作為中間層制備出了新型雙極膜。與流延法相比,雙極膜的膜層比較均勻且較薄,這些因素對降低雙極膜的電壓有巨大的作用。引用氧化石墨烯作為雙極膜的中間層,氧化石墨烯上有較多的含氧官能團,水的氫鍵在遇到氧化物時發(fā)生質(zhì)子轉(zhuǎn)移,導致水解活化能的下降,降低雙極膜的電壓。利用單因素法改變制備雙極膜的條件,通過改變噴涂物質(zhì)的濃度和次數(shù),經(jīng)過I-V曲線測試調(diào)控出最佳雙極膜,在100mA·cm-2時,電壓為1.75V。本論文研究中最佳成膜條件為：噴涂0.3wt%的聚丙烯酸鈉的次數(shù)為14次,噴涂2wt%的戊二醛次數(shù)為4次,噴涂濃度2mg·mL-1的氧化石墨烯次數(shù)為2次、噴涂時間設(shè)定為3s、相鄰噴涂間隔時間為60min。接觸角(親水性測試研究)結(jié)果表明該膜的界面層親水性增強；電滲析實驗表明了該膜中間層因為氧化石墨烯的加入,產(chǎn)酸堿能力增強；中間層厚度測試結(jié)果表明了新的制備方法制備的雙極膜中間層厚度極薄；SEM結(jié)果表明聚在AM-1膜表面上形成了極薄且表面均勻的復合膜(中間層和陽膜)；雙極膜膜溶脹度測試結(jié)果表明了膜的耐酸堿性性能增強。
[Abstract]:The bipolar membrane is a new type of composite membrane by reverse voltage, water in the bipolar membrane interface layer decomposition, decomposition of H+ and OH- and by Yin Yang, migrated to the membrane solution. This process is simple, less waste emissions, so the bipolar membrane technology has become a research hotspot in recent years, in order to solve this chemical pollution, environment, food engineering technology has brought a new breakthrough, bipolar membrane technology is widely used in foreign countries, but due to the domestic preparation of bipolar membrane cost is high and the resistance is large, resulting in bipolar membrane will still limit the domestic application, so the research of low voltage water dissociation, bipolar membrane stability has become strong hot issues in the study of bipolar membrane in recent years. This paper use the spraying method film and graphene oxide as the middle layer to fabricate the new bipolar membrane. Compared with casting method, layer of bipolar membrane is very homogeneous and thin, these factors Have a great effect on reducing the voltage of bipolar membrane. Graphene oxide as the intermediate layer of bipolar membrane, graphene oxide has more oxygen-containing functional groups, hydrogen bonding of water in oxide occurs when the proton transfer leads to a decrease in the activation energy of hydrolysis, electric pressure reduction of bipolar membrane. Changes in the preparation of a bipolar membrane using the single factor method, by changing the spraying concentration and number of substances, through the I-V curve test regulation best bipolar membrane in 100mA, cm-2, 1.75V. voltage is the best experimental conditions in this study is: the number of sodium polyacrylate 0.3wt% sprayed for 14 times, spraying 2wt% glutaraldehyde 4 times the number of spraying, the graphene oxide concentration 2mg / mL-1 for 2 times, the spraying time is set to 3S, the adjacent spraying interval is 60min. contact angle (of hydrophilic test) results show that the interface layer of the hydrophilic property of the membrane electrodialysis is enhanced; The results show that the film layer because of the addition of graphene oxide, increase production base ability; the thickness of the middle layer the results of test show that the intermediate layer thickness method for preparation of new preparation; SEM results show that poly in the AM-1 film formed on the surface of thin and uniform surface of the composite membrane (the middle layer and the Yang film); bipolar membrane swelling test results show that the enhancement of acid and alkaline property of the film.

【學位授予單位】：北京化工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ127.11;TB383.2

【參考文獻】

相關(guān)期刊論文 前1條

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本文編號：1622150