本文關(guān)鍵詞：多功能超疏水抗菌材料的制備及其表面性能的研究　出處：《浙江大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 超疏水 自清潔 抗菌 智能響應(yīng) 油水分離

【摘要】：細(xì)菌等微生物易在材料表面滋生并形成生物膜,給人類(lèi)的生活、健康以及工業(yè)生產(chǎn)帶來(lái)極大的威脅。經(jīng)濟(jì)的發(fā)展也產(chǎn)生了很多環(huán)境問(wèn)題,比如海上原油泄漏和含油污水等的大量排放導(dǎo)致的水體浮油污染。近年來(lái)研究發(fā)現(xiàn)超疏水/超親油、超親水/水下超疏油等超浸潤(rùn)表面具有很好的防污及油水分離性能。然而,目前已有的超疏水表面大多抗菌效果不長(zhǎng)效,也會(huì)對(duì)環(huán)境產(chǎn)生一定的影響,而油水分離材料表面易受油和微生物等的污染導(dǎo)致分離效率降低。因此開(kāi)發(fā)抗菌效果持久、環(huán)境友好、可智能性響應(yīng)的多功能超浸潤(rùn)材料具有重要意義。鑒于此,本論文將季銨鹽(QAS)改性的含氟聚合物,與表面富含羥甲基的聚脲醛納米粒子(PUFNPs)、六亞甲基二異氰酸酯(HMDI)發(fā)生交聯(lián)反應(yīng),制備出超疏水抗菌涂層。通過(guò)SEM、AFM研究了涂層表面形貌,證實(shí)了 PUFNPs的引入增大了表面的粗糙度,并形成具有微納多尺度結(jié)構(gòu)。通過(guò)XPS和接觸角測(cè)試進(jìn)一步研究了表面化學(xué)組成對(duì)潤(rùn)濕性能的影響,指出表面氟元素和N+含量成為影響涂層潤(rùn)濕性的主要因素。所制備的涂層具有優(yōu)異的自清潔性和疏液性,并可用于多種基材上。此外,經(jīng)過(guò)20次交叉切口膠帶循環(huán)和16次磨損循環(huán)后,涂層依然有很好的機(jī)械穩(wěn)定性。最后抗菌測(cè)試結(jié)果表明當(dāng)N+含量高于0.11%,所得的涂層對(duì)E.coli和S.aureus的殺菌率均在82%以上,甚至可達(dá)到100%。為了進(jìn)一步得到響應(yīng)性的智能型材料,論文將甲基丙烯酸N,N-二甲氨基乙酯(DMAEMA)引入到含氟抗菌聚合物中,并與PUFNPs、HMDI在棉織物上進(jìn)行交聯(lián),制備出智能型超疏水抗菌織物。用SEM、XPS研究了不同pH溶液處理后的織物的表面形貌和化學(xué)組成,發(fā)現(xiàn)表面具有微納復(fù)合結(jié)構(gòu),而且pH溶液處理并不會(huì)破壞其表面形貌,但會(huì)對(duì)其表面N+含量產(chǎn)生影響。當(dāng)用酸液處理后,N+含量明顯升高。用接觸角考察了所制備織物的pH響應(yīng)性能,表明其被酸液處理時(shí)才出現(xiàn)潤(rùn)濕性的變化,且隨著pH降低,織物的pH響應(yīng)時(shí)間減小,最終變成超親水表面。另外,所得的超疏水抗菌織物被油污染后仍具有優(yōu)良的自清潔性,經(jīng)不同pH處理后也保持著較高的抗菌率(高于80%)。油水分離實(shí)驗(yàn)結(jié)果顯示,響應(yīng)性織物在經(jīng)過(guò)pH響應(yīng)后實(shí)現(xiàn)了從超疏水/超親油性向超親水/水下超疏油性的轉(zhuǎn)變,從而可以選擇性地分離或吸附油水混合液中的油相和水相。
[Abstract]:Bacteria and other microorganisms can easily breed on the surface of materials and form biofilm, which brings great threat to human life, health and industrial production. The economic development has also produced a lot of environmental problems. For example, the oil slick pollution caused by the oil leakage and the discharge of oily sewage, etc. In recent years, it has been found that superhydrophobic / hydrophilic water is superhydrophobic or hydrophilic. Super-hydrophilic / ultra-hydrophobic surfaces have good anti-fouling and oil-water separation properties. However, most of the existing superhydrophobic surfaces do not have long antibacterial effects, which will also have a certain impact on the environment. However, the surface of oil-water separation materials is easy to be polluted by oil and microorganism, which leads to the decrease of separation efficiency. Therefore, the development of antimicrobial effect is long-lasting and environmentally friendly. In view of the importance of intelligent multi-functional superwetting materials, the fluorinated polymer modified by quaternary ammonium salt QASis is of great significance. The superhydrophobic antibacterial coating was prepared by crosslinking with polyurea-formaldehyde nanoparticles (PUFNPs) and hexamethylene diisocyanate (HMDI). The surface morphology of the coating was studied by AFM, which confirmed that the introduction of PUFNPs increased the surface roughness. The effect of surface chemical composition on wettability was further studied by XPS and contact angle measurements. It is pointed out that the content of fluoride and N on the surface is the main factor affecting the wettability of the coating. The coating has excellent self-cleaning and hydrophobic properties and can be used in many kinds of substrates. After 20 cross-notch tape cycles and 16 wear cycles, the coating still has good mechanical stability. Finally, the antibacterial test results show that when N content is higher than 0.11%. The bactericidal rates of the coatings on E. coli and S. aureus were above 82%, even up to 1000.In order to obtain more responsive intelligent materials, N methacrylate was prepared in this paper. N-dimethylaminoethyl ester (DMAEMA) was introduced into fluorine-containing antimicrobial polymer and crosslinked with PUFNPsHMDI on cotton fabric to prepare intelligent super-hydrophobic antibacterial fabric. SEM was used to prepare the super hydrophobic antibacterial fabric. The surface morphology and chemical composition of the fabric treated with different pH solutions were studied by XPS. It was found that the surface had micro-nano composite structure and the surface morphology was not destroyed by the treatment of pH solution. When treated with acid solution, the content of N increased obviously. The pH response of the prepared fabric was investigated by contact angle. It shows that the wettability changes only when treated with acid solution, and with the decrease of pH, the pH response time of the fabric decreases, and finally becomes super hydrophilic surface. The super-hydrophobic antibacterial fabric still has excellent self-cleaning property after being polluted by oil, and the antimicrobial rate is higher after different pH treatment (higher than 800.The result of oil-water separation experiment shows that the anti-bacterial rate is higher than 80%). After pH response, the responsive fabric can change from super hydrophobic / super hydrophilic to super hydrophilic / underwater super hydrophobicity, which can selectively separate or adsorb the oil and water phases in the oil / water mixture.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TB34

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 蔡宏鎮(zhèn);沈忱;任滿年;曹發(fā)海;;環(huán)流氣浮法處理含油水體工藝[J];化工學(xué)報(bào);2015年02期

2 廖渴;葉翔宇;徐志康;;聚丙烯/碳酸鈣復(fù)合無(wú)紡布的仿生礦化制備及其在油水分離中的應(yīng)用[J];高分子學(xué)報(bào);2014年09期

3 張鵬飛;張德遠(yuǎn);陳華偉;;豬籠草內(nèi)表面微觀結(jié)構(gòu)及其浸潤(rùn)性研究[J];農(nóng)業(yè)機(jī)械學(xué)報(bào);2014年01期

4 邱宇辰;劉克松;江雷;;花生葉表面的高黏附超疏水特性研究及其仿生制備[J];中國(guó)科學(xué):化學(xué);2011年02期

5 江雷;;具有特殊浸潤(rùn)性的仿生智能納米界面材料[J];科學(xué)觀察;2007年05期

6 郭東紅,李森,袁建國(guó);表面活性劑驅(qū)的驅(qū)油機(jī)理與應(yīng)用[J];精細(xì)石油化工進(jìn)展;2002年07期

相關(guān)博士學(xué)位論文 前1條

1 任春雷;膜蒸餾海水淡化和油水分離用疏水多孔陶瓷膜研究[D];中國(guó)科學(xué)技術(shù)大學(xué);2014年

相關(guān)碩士學(xué)位論文 前2條

1 蔣約林;環(huán)境響應(yīng)型紡織基吸附材料用于高效油水分離的研究[D];浙江理工大學(xué);2016年

2 武文娟;高性能吸油材料的制備及其油水分離性能的研究[D];青島科技大學(xué);2014年

，

本文編號(hào)：1429216