【摘要】：以正硅酸乙酯為硅源、鈦酸異丙酯為鈦源,采用改進(jìn)的溶膠-凝膠法制備了不同鈦硅摩爾比的復(fù)合氣凝膠,在不同溫度下進(jìn)行煅燒,得到金紅石型鈦硅(TiO_2-SiO_2)復(fù)合氧化物納米顆粒,然后通過三甲基氯硅烷(TMCS)改性,制得超疏水金紅石型TiO_2-SiO_2納米材料。探討了鈦硅摩爾比和煅燒溫度對鈦硅復(fù)合氧化物納米顆粒晶型的影響,并通過XRD、XPS、BET、SEM和FTIR等手段對產(chǎn)物進(jìn)行了表征,采用水接觸角測試(WCA)對納米材料改性后的疏水性能進(jìn)行了表征。結(jié)果表明:當(dāng)鈦硅摩爾比為5:1時(shí)制得的氣凝膠在1100℃煅燒及TMCS改性后,所制備的超疏水金紅石型納米鈦硅復(fù)合氧化物的比表面積大,疏水性能優(yōu)異,其比表面積達(dá)348 m~2·g~(-1),水接觸角達(dá)到154.7°,在構(gòu)建具有納微分層結(jié)構(gòu)的外墻裝飾材料的面漆方面具有潛在的應(yīng)用前景。
[Abstract]:Using ethyl orthosilicate as silicon source and isopropyl titanate as titanium source, composite aerogels with different molar ratios of titanium and silicon were prepared by an improved sol-gel method. Rutile titanium-silicon (TiO_2-SiO_2) composite oxide nanoparticles were obtained by calcination at different temperatures. Then the ultrahydrophobic rutile TiO_2-SiO_2 nanomaterials were prepared by trimethylchlorosilane (TMCS) modification. The effects of molar ratio of titanium to silicon and calcination temperature on the crystalline morphology of titanium-silicon composite oxide nanoparticles were discussed. The products were characterized by XRD,XPS,BET,SEM and FTIR. The hydrophobicity of the modified nanocrystals was characterized by water contact angle test (WCA). The results show that when the molar ratio of titanium to silicon is 5:1, the prepared aerogels calcined at 1100 鈩，

本文編號：2261986