本文選題：粉石英/納米TiO2 + 復(fù)合粉體　； 參考：《西南科技大學(xué)》2015年碩士論文

【摘要】：本文深入探究了粉石英基生態(tài)涂料的甲醛凈化機(jī)制及其影響因素。針對粉石英/納米Ti O2復(fù)合粉體,研究了其催化氧化去除甲醛的相關(guān)機(jī)制,并通過了FT-IR、SEM、TGA等方法進(jìn)行表征,研究了粉石英與納米Ti O2在甲醛凈化涂料中的協(xié)同增強(qiáng)效應(yīng);研究涂料中負(fù)離子粉對甲醛凈化率的影響機(jī)制;同時(shí)研究了氣候條件對粉石英基生態(tài)涂料凈化甲醛的影響,研究顏色對粉石英/納米Ti O2涂料甲醛凈化性能的影響。結(jié)果表明:(1)經(jīng)過混合球磨后,粉石英與納米Ti O2之間發(fā)生了鍵合,形成了Si-O···Ti或Ti-O···Si橋中的分子間作用鍵,其紅外波峰可能位于903cm-1左右,且其球磨時(shí)間越長,其峰的位置越向高波數(shù)位置處偏移;粉石英對Ti O2具有一定的分散作用,通過提升其光催化作用點(diǎn)位,大大提高其甲醛凈化率;負(fù)離子粉的加入能使涂料具有一定的甲醛凈化能力,特別是夜間凈化能力,與納米Ti O2之間存在一定的互補(bǔ)效應(yīng)。(2)氣候因素影響大小依次為濕度光照強(qiáng)度溫度,隨著濕度增大甲醛凈化率單調(diào)升高,隨著光照強(qiáng)度增大甲醛凈化率先升后降,隨著溫度升高甲醛凈化率先降后升;設(shè)定條件為我國兩個(gè)特征濕度下,甲醛凈化速率非�？�,在2h內(nèi)凈化率即可達(dá)到90%左右,甲醛的凈化效率是高濕度高于低濕度,夜間無光情況下,甲醛凈化效率高達(dá)93%。(3)掃描電鏡也看出粉石英可以改善Ti O2的分散效果,涂料的多孔材料的吸附甲醛能力與負(fù)離子粉釋放負(fù)氧離子催化氧化甲醛的共同作用,使得其在夜間仍具有很高凈化率,而且其夜間吸附的甲醛又能在白天被快速催化氧化,恢復(fù)吸附功能,這造就了本涂料超級的凈化甲醛持久能力。(4)顏色對粉石英/納米Ti O2涂料甲醛凈化性能的影響,與未加顏色的對比樣96%甲醛凈化性能相比,有色涂料甲醛凈化率都有所降低,紅、橙、綠、蘭、紫甲醛凈化性能基本一致,為93.2%左右,降低了3個(gè)百分點(diǎn),黃色和黃綠色的甲醛凈化性能降低較多,在90%左右,降低6個(gè)百分點(diǎn);黃綠色和黃色對近紫外光的吸收相對要強(qiáng)一些,對涂料甲醛凈化率的影響要大一些;顏料點(diǎn)位占據(jù)涂膜表面,減少Ti O2催化氧化的點(diǎn)位,會(huì)一定程度降低涂膜的氧化降解效果,另一方面涂料的顏色越深,吸收可見光越多,涂膜溫度也會(huì)略微升高,有助于提高光催化反應(yīng)速度,然而最終共同作用的結(jié)果使有色涂料的甲醛凈化性能有所降低。本論文研究的內(nèi)容對該涂料產(chǎn)品改進(jìn)有較好的指導(dǎo)作用,還能促進(jìn)產(chǎn)品的推廣應(yīng)用與升級,帶動(dòng)該涂料產(chǎn)品的多元化發(fā)展,創(chuàng)造良好的經(jīng)濟(jì)和社會(huì)價(jià)值。
[Abstract]:In this paper, the mechanism of formaldehyde purification and its influencing factors of powdered quartz-based ecological coatings were studied.The mechanism of formaldehyde removal by catalytic oxidation of powdered quartz / nano-TiO _ 2 composite powder was studied. The synergistic enhancement effect of powdered quartz and nano-TiO _ 2 in formaldehyde purifying coating was studied by means of FT-IRU SEMGA and other methods.The influence mechanism of negative ion powder on formaldehyde purification rate and the effect of climate conditions on formaldehyde purification of powdered quartz based ecological coatings were studied, and the effect of color on formaldehyde purification performance of powdered quartz / nano TIO 2 coatings was studied.The results show that after mixed ball milling, the bond between powdered quartz and nano-TiO _ 2 is formed, and the intermolecular interaction bond in Si-O Ti or Ti-O Si bridge is formed. The infrared wave peak may be about 903cm-1, and the longer the milling time is, the longer the ball-milling time is.The position of the peak shifts to the position of high wave number, and the powder quartz has a certain dispersing effect on TIO _ 2, which can greatly improve the efficiency of formaldehyde purification by increasing the photocatalytic action point of TIO _ 2.The addition of anion powder can make the coating have a certain formaldehyde purification ability, especially at night, and there is a certain complementary effect between the coating and nano-TiO _ 2) the influence of climatic factors is humidity, light intensity and temperature.The purification rate of formaldehyde increases monotonously with the increase of humidity, increases with the increase of light intensity, and then decreases with the increase of temperature.The purification efficiency of formaldehyde is higher than that of low humidity in 2 hours. Under the condition of no light at night, the purification efficiency of formaldehyde is as high as 93.0.The SEM also shows that powdered quartz can improve the dispersion effect of TIO _ 2.The adsorption ability of the porous material of coating and the negative ion release of anion to catalyze the oxidation of formaldehyde make it still have a high purification rate at night, and the formaldehyde adsorbed at night can be quickly oxidized by catalysis during the day.The adsorption function was restored, which resulted in the effect of color on formaldehyde purification performance of quartz / nano-TiO _ 2 coating, which was compared with 96% formaldehyde without color contrast.The purifying rate of formaldehyde in non-ferrous coatings was all decreased. The purifying performance of red, orange, green, blue and purple formaldehyde was basically the same, about 93.2%, which decreased by 3 percentage points. The purification performance of yellow and yellowish green formaldehyde decreased more, about 90%.The absorption of near ultraviolet light by yellowish green and yellow was stronger than that of yellow, and the effect on the purification rate of paint formaldehyde was greater. The spot position of pigment occupied the surface of coating film and reduced the point of catalytic oxidation of TIO 2.On the other hand, the darker the color of the coating, the more visible light it absorbs, and the higher the film temperature will be, which will help to improve the speed of photocatalytic reaction.However, the final result of the joint action of the color paint formaldehyde purification performance has been reduced.The content of this paper has a good guiding effect on the improvement of the coating product, it can also promote the application and promotion of the product, promote the diversified development of the coating product, and create good economic and social value.
【學(xué)位授予單位】：西南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ630.1;X51

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