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alibabashiqun鐵桿木蟲 (知名作家)
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翻譯摘要。。
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希望能夠有蟲友幫我翻譯下摘要。特奉獻(xiàn)158個(gè)BB，說話算話�。�！如下文： 微濾復(fù)合陶瓷膜在液體分離、生物化工、環(huán)保等領(lǐng)域有著廣泛的應(yīng)用前景。但價(jià)格昂貴、分離效率低的狀況仍是當(dāng)今膜科學(xué)研究的一個(gè)重要課題。利用金屬氧化物對(duì)微濾陶瓷復(fù)合膜進(jìn)行修飾改性不僅可以改善它的物化性能，而且還可以顯著提高無(wú)機(jī)膜分離效率，因此，進(jìn)行微濾陶瓷復(fù)合膜的改性及其調(diào)控方法研究，將為微濾陶瓷膜的應(yīng)用建立堅(jiān)實(shí)的技術(shù)平臺(tái)。 本論文以Zn(OAc)2為前驅(qū)體，乙二醇甲醚為溶劑，一乙醇胺為穩(wěn)定劑，首次采用溶膠-凝膠法制備ZnO改性溶膠，以Al2O3微濾膜(孔徑φ=0.89μm)作為基體進(jìn)行其孔道內(nèi)壁修飾改性，對(duì)影響ZnO改性溶膠的反應(yīng)溫度、反應(yīng)物濃度、溶膠陳化時(shí)間等工藝因素進(jìn)行了詳細(xì)探討，測(cè)試了Al2O3微濾膜改性前后的孔徑和水通量變化，運(yùn)用TEM、SEM、Zeta電位等對(duì)改性后的微濾膜進(jìn)行檢測(cè)分析。研究結(jié)果表明：在水浴溫度為65℃，改性溶膠中Zn2+改性溶膠濃度為0.2mol/I，pH為3，溶膠陳化時(shí)間為72小時(shí)，經(jīng)600℃焙燒改性樣品，可在微濾膜孔道內(nèi)壁獲得一層晶粒為5～15nm、厚度為15nm左右的納米ZnO改性涂層。在微濾膜孔徑減小的情況下，改性后的微濾膜水通量有顯著的提高，最大提高幅度為159.6%。 為對(duì)ZnO改性涂層進(jìn)行性能調(diào)控，本文在溶膠-凝膠法制備ZnO改性溶膠最佳工藝條件基礎(chǔ)上，進(jìn)行了Ag離子摻雜研究。通過摻雜不同摩爾質(zhì)量分?jǐn)?shù)Ag離子，測(cè)試Ag離子摻雜ZnO改性的孔徑和水通量變化，以及Ag離子摻雜ZnO改性涂層的Zeta電位大小，著重探討了摻雜改性涂層Zeta電位與微濾膜過濾通量的關(guān)系。當(dāng)過濾介質(zhì)蒸餾水的pH=7時(shí)，以0.2mol(wt%)Ag摻雜的ZnO顆粒的Zeta電位最高且水通量提高幅度最大。實(shí)驗(yàn)結(jié)果發(fā)現(xiàn)：由Ag離子摻雜ZnO納米晶粒所構(gòu)成的改性涂層同樣具有提高微濾陶瓷膜水通量的功能，比未改性的水通量提高幅度最大為187.96%，效果比單獨(dú)用ZnO改性明顯。 最好今天下午前翻譯完，請(qǐng)不要用谷歌或者其他在線翻譯�。≈x謝。。 |
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jingjing1005
木蟲 (小有名氣)
- 翻譯EPI: 27
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- 注冊(cè): 2010-05-19
- 專業(yè): 質(zhì)譜分析
★ ★
wypward(金幣+2):鼓勵(lì)下，辛苦啦！ 2010-05-27 18:39:31
alibabashiqun(金幣+100, 翻譯EPI+1):辛苦了，我也給樓下哥們幾個(gè)哈。。別嫌少。。非常感激 2010-05-28 08:35:03
wypward(金幣+2):鼓勵(lì)下，辛苦啦！ 2010-05-27 18:39:31
alibabashiqun(金幣+100, 翻譯EPI+1):辛苦了，我也給樓下哥們幾個(gè)哈。。別嫌少。。非常感激 2010-05-28 08:35:03
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Composite ceramic membranes for microfiltration are wildly used in liquid separation, biological chemicals, environmental protection and other fields with a broad application prospects. However, it is still an important topic of membranes research that the composite ceramic membranes are of high price but of low separation efficiency. The modification of them by metal oxide can not only improve their physical and chemical properties, but also significantly enhance the separation efficiency of inorganic membrane. Therefore, the research on the modification of composite ceramic membranes for microfiltration will establish a solid technology platform for their applications. In this thesis, the sol-gel method to prepare modified ZnO sol was first used with Zn (OAc) 2 as precursor, ethylene glycol monomethyl ether as solvent, and ethanolamine as the stabilizer. Its inner wall modification was done with Al2O3 microfiltration membrane (pore size φ = 0.89 μm) as substrate. The craft factors such as reaction temperature, reaction concentration and sol aging time influencing the ZnO modified sol were fully discussed in detail. Also the changes of pore size and water flux before and after the modification of Al2O3 micro-membrane were detected and analyzed using TEM, SEM, Zeta potential, etc. The results show that: in the water bath of 65 ℃, the concentration of Zn2 +modified sol was 0.2mol / I, pH was 3, sol aging time was 72 hours. The samples calcined at 600 ℃ can form a modified nano-ZnO layer of grain 5 ~ 15nm, with the thickness of about 15nm. In the case of the reduction of membrane pore size, the water flux of modified micro-membrane increased significantly, reaching the largest value of 159.6%. For the regulation on the performance of modified ZnO layer, the Ag ions doping research was done in this paper on the basis of the studies on the optimal conditions for sol-gel method to prepare ZnO modified sol. Through doping with Ag ions of different molar mass, the changes of pore size, water flux and Zeta potential caused by Ag ions were tested. This paper mainly focuses on the relationship between the flux microfiltration and Zeta potential. At the PH of distilled water as filter medium of 7, the highest Zeta potential and the largest water flux of ZnO particles were achieved at 0.2mol (wt%) Ag-doped. It was found that the modified layer constituted of Ag doped ZnO nanocrystals also has the functions of improving membrane water flux, 187.96%more than the unmodified one at most, better than modified with ZnO alone. |
2樓2010-05-27 11:17:01
noleg
金蟲 (小有名氣)
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★ ★ ★
wypward(金幣+3):歡飲新蟲，謝謝參與，以后多來(lái)哦！ 2010-05-27 18:39:05
alibabashiqun(金幣+58):非常感激，也給你幾個(gè)BB別嫌少啊。。呵呵。。 2010-05-28 08:35:38
wypward(金幣+3):歡飲新蟲，謝謝參與，以后多來(lái)哦！ 2010-05-27 18:39:05
alibabashiqun(金幣+58):非常感激，也給你幾個(gè)BB別嫌少啊。。呵呵。。 2010-05-28 08:35:38
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Composite ceramic membrane for microfiltration has a prosperous future of application in fields of liquid separation, biological chemicals, environmental protection, etc. And it is still an important topic of membrane research because of its high price and low separation efficiency. Modified by metal oxide, their physical and chemical properties proved to be improved, meanwhile, the separation efficiency of inorganic membrane were also enhanced significantly. Therefore, the research on the modification and regulation of composite ceramic membrane for microfiltration will provide a solid technological platform for their applications. In this thesis, the sol-gel method to prepare modified ZnO sol was first used with Zn(OAc)2 as precursor, ethylene glycol monomethyl ether as solvent, and ethanolamine as the stabilizer. Its inner wall modification was done with Al2O3 microfiltration membrane (pore size φ = 0.89 μm) as substrate. The pocess factors influencing the modification of ZnO sol, such as reaction temperature, reaction concentration and sol aging time, were fully discussed in detail. Also, the changes of pore size and water flux before and after the modification of Al2O3 micro-membrane were detected and analyzed using TEM, SEM, Zeta potential, etc. The results show that: in a water bath of 65 ℃, the concentration of Zn2+modified sol was 0.2mol / I, pH was 3, sol aging time was 72 hours. The modified sample calcined at 600 ℃ could form a thin layer of nano-ZnO grain, with size of 5 to 15nm and thickness of about 15nm. When membrane pore size was decreased, the water flux of modified micro-membrane increased significantly, reaching the largest value of 159.6%. To regulate the performance of modified ZnO layer, the Ag ions doping was done on the basis of the studies on the optimal conditions for sol-gel method to prepare ZnO modified sol. The changes of pore size, water flux and Zeta potential caused by Ag ions of different molar ratio were tested. This paper mainly focused on the relationship between the flux microfiltration and Zeta potential. When the PH value of distilled water, as filtration medium, was 7, and the doping ratio of Ag was 0.2mol (wt%), the highest Zeta potential and the largest water flux of ZnO particles were achieved. It was found that the modified layer constituted of Ag doped ZnO nanocrystals also has the function of improving membrane water flux, 187.96%( max.) more than the unmodified one, better than that modified with ZnO alone. 平心而論，二樓也不錯(cuò)，但不少地方不是很妥。 歡迎切磋、指正！ |
3樓2010-05-27 15:21:15
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