本文選題：聚碳酸酯 + 納米二氧化鈦　； 參考：《曲阜師范大學(xué)》2017年碩士論文

【摘要】：超疏水材料在交通運(yùn)輸、建筑物外表自清潔、流體運(yùn)輸、環(huán)境以及醫(yī)療等領(lǐng)域具有廣泛的應(yīng)用。但是,大部分超疏水材料表面易于粘附有機(jī)污染物(如染料等),并難以脫附以實(shí)現(xiàn)自清潔。本論文發(fā)展了兩種超疏水材料的制備方法,一方面,將納米二氧化鈦(TiO_2)光催化材料摻雜于聚碳酸酯(PC)基體,構(gòu)建了一種能在可見光下催化降解難以脫附的有機(jī)染料的超疏水涂層;另一方面,以二甲基二甲氧基硅烷(Me_2Si(OMe)_2)改性納米二氧化硅(SiO_2),制得一種超疏水納米復(fù)合材料,并成功用于含油廢水中油水分離。(1)發(fā)展了一種具有可見光下光催化效應(yīng)的超疏水涂層的制備方法及其初步應(yīng)用于有機(jī)污染物的催化降解(第二章)。利用多巴胺(DA)還原銀離子(Ag)并沉積于TiO_2表面,制得納米二氧化鈦復(fù)合顆粒(DA-TiO_2(Ag)),用以摻雜于PC基體中,進(jìn)而借助相分離途徑以及簡單的“浸漬和干燥”步驟,制得DA-TiO_2(Ag)@PC納米復(fù)合膜,再經(jīng)采用二甲苯(DMB)刻蝕(Etching)處理后,制備出E-DA-TiO_2(Ag)@PC超疏水涂層。同時(shí),預(yù)先引入粘合劑改善超疏水涂層在材料基底表面的粘附穩(wěn)固性。研究表明,一方面,DA的使用不僅實(shí)現(xiàn)了Ag在納米TiO_2表面的牢固沉積,而且顯著增強(qiáng)了納米TiO_2對(duì)可見光的吸收利用率;另一方面,通過在納米TiO_2表面沉積Ag形成的DA-TiO_2(Ag),具有極高的光催化降解效率,由此制得的超疏水涂層具有強(qiáng)大的光催化降解有機(jī)污染物的功能,可有效地實(shí)現(xiàn)表面的自清潔。此外,涂層中銀離子尚賦予該涂層一定的抗菌性能,可望廣泛應(yīng)用于醫(yī)療與衛(wèi)生器械的表面抗菌與自清潔處理。(2)提出了一種基于硅烷改性的納米二氧化硅的超疏水復(fù)合材料的制備途徑,并初步應(yīng)用于含油廢水中油水分離(第三章)。以異丙醇為溶劑,利用納米Me_2Si(OMe)_2與SiO_2的偶聯(lián)作用改變其親水性質(zhì),以獲得超疏水特性,進(jìn)而采用溶膠-凝膠法,并引入一定量的環(huán)氧樹脂作為粘合劑,制備出SiO_2/Me_2Si(OMe)_2超疏水復(fù)合材料(棒或餅狀物);在低溫、高溫、強(qiáng)酸堿、高鹽度等苛刻條件下,考察了該材料涂覆在不同材料基體表面的超疏水性能及其使用壽命。結(jié)果表明,該超疏水復(fù)合材料可適用于惡劣環(huán)境下各種材質(zhì)表面的超疏水涂覆處理。同時(shí),采用該材料處理含油廢水,成功地實(shí)現(xiàn)了其油水分離。
[Abstract]:Superhydrophobic materials are widely used in transportation, building surface cleaning, fluid transportation, environment and medical treatment.However, the surface of most superhydrophobic materials is easy to adhere to organic pollutants (such as dyes, etc.), and it is difficult to desorption to realize self-cleaning.In this paper, two preparation methods of superhydrophobic materials have been developed. On the one hand, nano-TiO _ 2 / TiO-2) photocatalytic materials were doped into polycarbonate (PC-PC) matrix.A superhydrophobic coating which can catalyze the degradation of organic dyes which is difficult to be desorbed under visible light was constructed. On the other hand, a superhydrophobic nanocomposite was prepared by modifying SiO2O _ 2 with dimethyl dimethoxysilane (M _ 2Si _ 2Si _ 2O _ 2).The preparation method of superhydrophobic coating with visible light catalysis effect and its preliminary application in the catalytic degradation of organic pollutants were developed.TiO_2 nanocomposite films were prepared by using dopamine (DA) to deoxidize silver ions and deposited on the surface of TiO_2. The nano-TiO _ 2 composite particles were prepared, which were doped into PC substrates. Furthermore, DA-TiO_2(Ag)@PC nanocomposite films were prepared by phase separation and simple "impregnation and drying" steps.The E-DA-TiO_2(Ag)@PC superhydrophobic coating was prepared by etch treatment with xylene DMB.At the same time, the adhesion stability of the superhydrophobic coating on the substrate surface was improved by introducing the adhesive agent in advance.The results show that, on the one hand, the use of DA not only realizes the solid deposition of Ag on the surface of TiO_2, but also enhances the absorption efficiency of visible light of nano-, on the other hand,DA-TiO2Ag-Ag deposited on the surface of nanometer TiO_2 has a high photocatalytic degradation efficiency. The superhydrophobic coating has a powerful function of photocatalytic degradation of organic pollutants and can effectively realize self-cleaning of the surface.In addition, the silver ion in the coating gives the coating some antibacterial properties.It is expected that it will be widely used in the surface antibacterial and self-cleaning treatment of medical and sanitary devices. A new method for preparing superhydrophobic composites based on silane modified nano-silica has been proposed.It is applied to the separation of oil and water in oily wastewater (Chapter 3).Using isopropanol as solvent, the hydrophilic properties of Me_2Si(OMe)_2 nanoparticles were changed by coupling with SiO_2 to obtain superhydrophobic properties, and then a certain amount of epoxy resin was introduced as binder by sol-gel method.The superhydrophobic properties and service life of SiO_2/Me_2Si(OMe)_2 superhydrophobic composites (bar or cake) were investigated under harsh conditions such as low temperature, high temperature, strong acid and alkali, high salinity and so on.The results show that the superhydrophobic composite can be applied to superhydrophobic coating of various materials in harsh environment.At the same time, the oil-water separation was successfully realized by using this material to treat the oily wastewater.
【學(xué)位授予單位】：曲阜師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB34

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本文編號(hào)：1750236