本文選題：改性氧化石墨烯 + 混合基質(zhì)反滲透膜��； 參考：《浙江工業(yè)大學(xué)》2017年碩士論文

【摘要】：反滲透技術(shù)是高效、節(jié)能、應(yīng)用最為廣泛的海水淡化技術(shù)。目前,市場(chǎng)上占主導(dǎo)地位的商業(yè)反滲透膜是芳香聚酰胺反滲透膜。但是,膜生物污染問(wèn)題增加了反滲透系統(tǒng)的操作運(yùn)行成本,限制了反滲透膜的快速發(fā)展。因此,制備出具有抗菌性的反滲透膜顯得尤為重要。以氧化石墨烯(GO)為抗菌納米粒子改性反滲透膜已有報(bào)道。本研究用Hummers法制備GO并進(jìn)一步通過(guò)改性氧化石墨烯(mGO)來(lái)制備抗菌材料。通過(guò)傅立葉變換紅外光譜(FTIR)、拉曼光譜(Raman)、X-射線光電子能譜(XPS)和透射電鏡(TEM)來(lái)分別表征GO和mGO的特征官能團(tuán)、特征峰、元素成分以及尺寸形態(tài)。mGO的FTIR和XPS結(jié)果顯示對(duì)氨基苯酚和GO成功反應(yīng)。在抗菌實(shí)驗(yàn)中以革蘭氏陰性的大腸桿菌和革蘭氏陽(yáng)性金黃色葡萄球菌作為細(xì)菌模型,結(jié)果顯示,當(dāng)GO和mGO含量超過(guò)0.005wt%時(shí),抗菌率均達(dá)到100%。并且在相同添加量濃度下,mGO的抗菌效果要比GO的抗菌效果好。實(shí)驗(yàn)中以GO和mGO作為水相添加劑,采用傳統(tǒng)的界面聚合法制備抗菌性混合基質(zhì)反滲透膜。用FTIR、掃描電鏡(SEM)和原子力顯微鏡(AFM)表征反滲透膜的形貌結(jié)構(gòu)。SEM和AFM結(jié)果顯示,GO反滲透膜和mGO反滲透復(fù)合膜和原始聚酰胺反滲透膜相比,功能層厚度和粗糙度均降低。在接觸角測(cè)試中,GO和mGO的加入均提高了膜的親水性能。在通量及截留率測(cè)試中,當(dāng)GO添加濃度為0.005wt%(G4)和mGO添加濃度為0.003wt%(M3)時(shí),通量較原始聚酰胺反滲透膜相比,分別提高了49.6%和24.5%,而截留率變化不大。本論文采用熒光顯微鏡觀察法來(lái)計(jì)算膜的抗菌性能,結(jié)果表明:原始聚酰胺膜對(duì)于細(xì)菌沒(méi)有明顯的抑制作用,對(duì)于最佳分離參數(shù)的GO和mGO膜對(duì)大腸桿菌的抑菌率分別為90.64%和95.41%,對(duì)金黃色葡萄球菌的抗菌率分別為90.43%和83.41%。
[Abstract]:Reverse osmosis (RO) is an efficient, energy-saving and widely used seawater desalination technology. At present, the dominant commercial reverse osmosis membrane is aromatic polyamide reverse osmosis membrane. However, the problem of membrane biological contamination increases the operating cost of reverse osmosis system and limits the rapid development of reverse osmosis membrane. Therefore, the preparation of antimicrobial reverse osmosis membrane is particularly important. Using graphene oxide (go) as antimicrobial nanoparticles modified reverse osmosis membrane has been reported. In this study, go was prepared by Hummers method and antibacterial materials were prepared by modified graphene oxide (MGO). The characteristic functional groups and characteristic peaks of go and MGO were characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy (Raman), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM), respectively. The FTIR and XPS results of elemental composition and size form of .mGO showed that p-aminophenol and go reacted successfully. Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus were used as the bacterial model in the antibacterial test. The results showed that when the contents of go and MGO exceeded 0.005 wt%, the antibacterial rate was 100%. The antimicrobial effect of MGO was better than that of go at the same concentration. In the experiment, go and MGO were used as water phase additives to prepare antimicrobial mixed matrix reverse osmosis membrane by traditional interfacial polymerization. FTIR, scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to characterize the morphology and structure of reverse osmosis membrane. The results of SEM and AFM showed that the thickness and roughness of functional layer of reverse osmosis membrane and MGO reverse osmosis composite membrane were lower than those of original polyamide reverse osmosis membrane. The hydrophilicity of the membrane was improved by the addition of go and MGO in the contact angle test. In the flux and retention test, when go concentration was 0.005wt% (G4) and MGO concentration was 0.003wt% (M3), the flux increased by 49.6% and 24.5g / g, respectively, compared with the original polyamide reverse osmosis membrane, but the rejection rate did not change much. In this paper, fluorescence microscopy was used to calculate the antibacterial properties of the membrane. The results showed that the original polyamide membrane had no obvious inhibitory effect on bacteria. The bacteriostasis rates of go and MGO membranes against Escherichia coli were 90.64% and 95.41 respectively, and those against Staphylococcus aureus were 90.43% and 83.41%, respectively.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ051.893

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相關(guān)期刊論文 前2條

1 蘆瑛;趙海洋;張林;侯立安;;含氧化石墨烯混合基質(zhì)反滲透復(fù)合膜的制備及性能研究[J];中國(guó)工程科學(xué);2014年07期

2 黃星;王劍;孫海靜;高學(xué)理;;共混制備抗菌聚醚砜中空纖維超濾膜及其表征[J];水處理技術(shù);2014年07期

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本文編號(hào)：2107011