本文選題：低表面能　切入點：超疏水　出處：《浙江大學(xué)》2015年碩士論文

【摘要】：超疏水表面是指材料表面穩(wěn)定的水接觸角要大于150°,滾動接觸角小于10°。超疏水表面的形成是納微復(fù)合型的粗糙結(jié)構(gòu)和疏水型化學(xué)基團(tuán)共同作用的結(jié)果。由于具有特殊的表面潤濕性能,超疏水材料被廣泛應(yīng)用于防污涂料、抗菌涂層、海洋涂料、織物“三防”整理劑、生物相容性材料、自清潔材料等各種領(lǐng)域。如何高效構(gòu)建超疏水表面,并拓展其在一些新興領(lǐng)域的應(yīng)用成為研究者們關(guān)注的焦點。本文采用工藝簡單的溶膠凝膠法,以納米硅溶膠、甲基三乙氧基硅烷(MTES)以及全氟己基磺酰氨丙基三乙氧基硅烷(HFTES)為原料,通過共水解縮合反應(yīng),制備了含氟納米雜合涂層材料,研究了其超疏水/疏油自清潔性能及低溫超疏水防覆冰性能。通過SEM, AFM及XPS等手段對納米雜合涂層進(jìn)行分析,發(fā)現(xiàn)含氟基團(tuán)在涂層表面具有明顯的富集現(xiàn)象,隨著硅溶膠含量的增加,涂層表面呈現(xiàn)不同尺度的粗糙結(jié)構(gòu)。隨著HFTES含量的增加,表面具有不同的化學(xué)組成。進(jìn)一步通過接觸角測試,研究了表面粗糙度和HFTES含量對涂層潤濕性能的影響,發(fā)現(xiàn)當(dāng)硅溶膠含量為達(dá)到30 wt%以上時,可形成納微復(fù)合粗糙結(jié)構(gòu),此時若HFTES含量高于6 wt%,所制備的含氟納米雜合涂層的水靜態(tài)接觸角達(dá)到166°,接觸角滯后和滾動角均小于5°,具有超疏水性能。當(dāng)HFTES含量繼續(xù)增加至30 wt%時,涂層對水、乙二醇、正十六烷、二碘甲烷的靜態(tài)接觸角分別為166°,143°,102°,136°,該涂層還表現(xiàn)出優(yōu)異的油下超疏水性能和明顯的抗血液與蛋清粘附性能,表現(xiàn)出優(yōu)異的多重疏液性能。對制備的納米雜合涂層進(jìn)一步開展了低溫超疏水與防覆冰性能的研究,發(fā)現(xiàn)較高的氟含量下涂層可表現(xiàn)出優(yōu)異的低溫超疏水性能,HFTES含量為30 wt%和40 wt%的涂層在-20℃的低溫環(huán)境下,對水的靜態(tài)接觸角大于160°,且滾動角小于10°,表現(xiàn)出優(yōu)異的低溫超疏水性能,而HFTES含量為6 wt%和10 wt%的雜合涂層則會在此溫度下則喪失超疏水性能。在-20℃的低溫環(huán)境下,當(dāng)HFTES的含量在30 wt%和40 wt%時,制備的超疏水涂層可以有效延長結(jié)冰時間達(dá)到1760s以上,具有較優(yōu)異的低溫防覆冰性能。
[Abstract]:The superhydrophobic surface means that the stable water contact angle is greater than 150 擄and the rolling contact angle is less than 10 擄.The formation of superhydrophobic surface is the result of the interaction between the rough structure of nanocomposite and hydrophobic chemical groups.Because of its special surface wettability, superhydrophobic materials are widely used in antifouling coatings, antimicrobial coatings, marine coatings, fabric "three prevention" finishing agents, biocompatibility materials, self-cleaning materials and other fields.How to efficiently construct superhydrophobic surface and expand its application in some new fields has become the focus of researchers.In this paper, fluorine-containing nano-hybrid coating materials were prepared by a simple sol-gel method using nano-silica sol, methyl triethoxy silane (MTESs) and perfluorohexyl sulfonyl propyl triethoxysilane (HFTES) as raw materials through co-hydrolysis condensation reaction.The superhydrophobic / oil-free self-cleaning properties and low-temperature super-hydrophobic anti-icing properties were studied.By means of SEM, AFM and XPS, it was found that fluorine-containing groups had obvious enrichment on the coating surface. With the increase of silica sol content, the surface of the coating presented rough structure of different scales.With the increase of HFTES content, the surface has different chemical composition.The effects of surface roughness and HFTES content on the wettability of the coating were studied by contact angle measurement. It was found that the nano-composite rough structure could be formed when the content of silica sol was over 30 wt%.When the content of HFTES is higher than 6 wt, the water static contact angle, contact angle lag and rolling angle of the fluorine-containing nano-hybrid coating are up to 166o, and the contact angle is less than 5 擄, so it has super hydrophobic property.The static contact angle of the coating to water, ethylene glycol, hexadecane and diiodomethane was 166 擄/ 143 擄/ 102 擄/ L ~ (136 擄), respectively, when the HFTES content continued to increase to 30 wt%. The coating also showed excellent oil superhydrophobic property and obvious anti-blood adhesion to egg white.It shows excellent performance of multifold liquid thinning.Further studies on the low-temperature ultra-hydrophobic and ice-resistant properties of the nano-hybrid coatings were carried out.It was found that the coatings with excellent low temperature super hydrophobicity and HFTES content of 30 wt% and 40 wt% could be obtained at a low temperature of -20 鈩，

本文編號：1717212