發(fā)布時間：2018-04-26 05:13

  本文選題：涂層 + 透明��； 參考：《陜西科技大學》2017年碩士論文

【摘要】：高透明性是光學器件(如:智能窗戶、太陽能電池板、相機鏡頭等)正常工作的必要條件。然而這些器件長期暴露于戶外環(huán)境中,不免粘附各種污染物導致其性能下降,因此需要定期進行清潔處理。眾所周知,荷葉表面的超疏水性能賦予其“出淤泥而不染”的自清潔功能。如果將這種原理應用到光學器件上,不僅可以長期保持物體表面的清潔,維持其特定功能性,還能減少人工清洗的繁瑣勞動以及洗滌劑的使用,可以說既環(huán)保又省力�；诖�,透明超疏水表面的構(gòu)筑及性能研究成為了近年來學術(shù)界的熱點課題。聚二甲基硅氧烷(PDMS)是一種具有良好化學穩(wěn)定性、耐候性和優(yōu)異透明性的疏水有機硅材料,被廣泛應用于超疏水表面的制備。本課題采用PDMS為二氧化硅前驅(qū)體材料,以十八胺改性碳納米管(MWCNTs-ODA)為模板在玻璃表面構(gòu)筑具有一定微觀粗糙度的透明硅納米管(SNT)涂層,再通過化學氣相沉積(CVD)固化PDMS對涂層進行疏水化處理,最終制備出具有高透明性的超疏水涂層。通過對涂層的透明性和潤濕性能進行表征,發(fā)現(xiàn)隨著噴涂液中PDMS濃度的提高,所得SNT涂層的透明度降低;去除模板過程中煅燒溫度的升高和煅燒時間的延長導致SNT涂層的透明度先升高后不變。隨著疏水化處理過程中固化PDMS沉積用量的增加和沉積時間的延長,水滴在所得涂層表面的接觸角(CA)增大,滾動角(SA)減小,涂層的透明性逐漸降低。研究結(jié)果表明,所得最優(yōu)涂層具有良好的透明性和優(yōu)異的超疏水性,涂層在可見光(400~780 nm)范圍內(nèi)平均透光率高達83%以上,水滴在其表面接觸角大于165°,滾動角小于3°。涂層經(jīng)過480℃高溫煅燒、500 mL水滴沖擊、4 h超聲處理、48 h強酸或強堿浸漬后,依然保持超疏水性和高透明性。將所得涂層應用于太陽能電池板的保護層,可以在維持太陽能電池正常發(fā)電的同時賦予其自清潔性能,具有廣闊的應用前景。
[Abstract]:High transparency is a necessary condition for the normal operation of optical devices (such as smart windows, solar panels, camera lenses, etc.). However, these devices are exposed to outdoor environment for a long time. As we all know, the super hydrophobicity of lotus leaf surface can give it self-cleaning function. If this principle is applied to optical devices, it can not only keep the surface clean for a long time and maintain its specific function, but also reduce the tedious labor of manual cleaning and the use of detergents, which can be said to be both environmentally friendly and labor-saving. Based on this, the construction and performance of transparent superhydrophobic surfaces have become a hot topic in academic circles in recent years. Poly (dimethylsiloxane) (PDMS) is a hydrophobic silicone material with good chemical stability, weather resistance and transparency, which is widely used in the preparation of superhydrophobic surfaces. In this paper, PDMS was used as the precursor of silica and octadecylamine modified carbon nanotube (MWCNTs-ODA) as template to fabricate transparent silicon nanotubes (SNTs) coatings with certain micro roughness on glass surface. The superhydrophobic coating with high transparency was prepared by hydrophobic treatment by chemical vapor deposition (CVD) solidified PDMS. The transparency and wettability of the coating were characterized. It was found that the transparency of the SNT coating decreased with the increase of the concentration of PDMS in the spray solution. The increase of the calcination temperature and the prolongation of the calcination time during the removal of the template lead to the increase of the transparency of the SNT coating first and then unchanged. With the increase of the amount of solidified PDMS deposition and the prolongation of deposition time during hydrophobic treatment, the contact angle (CA) of water droplets on the coating surface increases, the rolling angle SA) decreases, and the transparency of the coating decreases gradually. The results show that the optimum coating has good transparency and super hydrophobicity. The average transmittance of the coating is over 83% in the range of visible light (400 ~ 780nm), the contact angle of water droplets on its surface is more than 165 擄, and the rolling angle is less than 3 擄. The coating was impregnated with strong acid or alkali for 48 h after 500 mL of water droplet was calcined at 480 鈩，

本文編號：1804631