【摘要】：隨著納米技術(shù)的不斷發(fā)展,人們對(duì)新型功能材料的需求不斷增大。將納米材料與表面涂層技術(shù)相結(jié)合制備復(fù)合功能涂層,有利于擴(kuò)大納米材料的應(yīng)用,成為國(guó)際上納米材料科學(xué)的主要研究方向。目前,納米涂層的制備方法雖然已經(jīng)很多,但是,受工藝條件、設(shè)備等限制,一種簡(jiǎn)單、環(huán)保、應(yīng)用范圍廣、可大面積制備的技術(shù)仍亟待開發(fā)。 本文采用有機(jī)硅氧烷3-(甲基丙烯酰氧)丙基三甲氧基硅烷(KH570)為反應(yīng)單體,乙醇-水混合液為溶劑,通過溶膠-凝膠法制備有機(jī)硅基體樹脂,并涂覆于玻璃表面。討論了硅氧烷水解、縮合、固化條件對(duì)涂層性能的影響。證實(shí)當(dāng)室溫下KH570在95%的乙醇溶液中水解1h,涂覆于玻璃表面后在120℃下加熱3h,所得涂層硬度達(dá)到5H,附著力為0級(jí),耐老化性能好。利用傅立葉紅外光譜技術(shù)(FTIR)表征涂層表面固化前后基團(tuán)變化,分析了涂層固化機(jī)理。本方法工藝簡(jiǎn)單、成本低廉,是納米功能涂層中基體樹脂的理想制備工藝。 以所得KH570溶膠液為介質(zhì),與外購(gòu)納米TiO2溶膠摻混,獲得復(fù)合溶膠,將其涂覆到玻璃、PC、PET等基底上,再經(jīng)過120℃加熱固化3h,得到透明涂層�？疾炝思{米TiO2固含量對(duì)涂層光致超親水性能和透明度的影響,用SEM觀察了涂層表面結(jié)構(gòu)。結(jié)果表明,復(fù)合溶膠液中Ti02固含量為0.24%時(shí),所得涂層綜合性能最好。涂層經(jīng)過紫外照射10min后,表面靜態(tài)接觸角降為0°,可見光透過率達(dá)90%以上。本研究為簡(jiǎn)單、經(jīng)濟(jì)、大面積制備Ti02自清潔涂層提供了新思路。 采用同樣技術(shù),以所得KH570溶膠液為介質(zhì),與外購(gòu)納米ATO-乙醇漿液摻混,然后涂覆于玻璃、PC、PET等基底上,以制備新型透明隔熱涂層。考察了ATO固含量對(duì)涂層性實(shí)際隔熱效果和光譜響應(yīng)的影響,用SEM觀察了涂層表面結(jié)構(gòu)。發(fā)現(xiàn)當(dāng)復(fù)合溶膠中ATO固含量為10%時(shí),涂層綜合性能最佳。涂有ATO涂層的玻璃基材遮蓋的泡沫塑料箱內(nèi)溫度較空白基材對(duì)應(yīng)箱內(nèi)溫度低13℃,涂層在可見光區(qū)的透過率在85%左右,紅外線阻隔率達(dá)到70%左右。涂有ATO涂層的PC基材遮蓋的泡沫塑料箱內(nèi)溫度較空白基材對(duì)應(yīng)箱內(nèi)溫度低10℃,涂層在可見光區(qū)的透過率在80%左右,紅外線阻隔率達(dá)到70%左右。涂有ATO涂層的PET基材遮蓋的泡沫塑料箱內(nèi)溫度較空白基材對(duì)應(yīng)箱內(nèi)溫度低10℃,涂層在可見光區(qū)的透過率在60%左右,紅外線阻隔率達(dá)到80%左右。本實(shí)驗(yàn)所得聚硅氧烷基質(zhì)涂層改善了現(xiàn)有聚氨酯涂層硬度、耐老化、耐水等性能不佳的缺點(diǎn)。
[Abstract]:With the development of nanotechnology, the demand for new functional materials is increasing. The preparation of composite functional coatings by combining nanomaterials with surface coating technology is beneficial to expand the application of nanomaterials and become the main research direction of nanomaterials science in the world. At present, there are many preparation methods of nano-coating, but due to the technical conditions, equipment and other limitations, a simple, environmentally friendly, wide range of applications, can be prepared in a large area of technology still need to be developed. In this paper, organosiloxane 3- (methacryloxy) propyltrimethoxysilane (KH570) was used as reactive monomer and ethanol-water mixture as solvent. Silicone matrix resin was prepared by sol-gel method and coated on glass surface. The effects of hydrolysis, condensation and curing conditions of siloxane on the properties of the coating were discussed. The results show that when KH570 is hydrolyzed in 95% ethanol solution at room temperature for 1 h, then coated on the glass surface for 3 h at 120 鈩，

本文編號(hào)：2261740