本文關(guān)鍵詞：涂料中VOC的散發(fā)與殘留研究　出處：《浙江大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 涂料 VOC 殘留含量 檢測方法

【摘要】：涂料散發(fā)VOC是室內(nèi)環(huán)境污染的重要來源。近年來,雖然更為環(huán)保的水性漆的推廣使得油性漆的使用頻率降低,但水性漆也不能做到真正“零污染”。國內(nèi)外學(xué)者的研究主要集中在濕漆膜VOC的散發(fā)上,并未關(guān)注干漆膜中VOC的殘留檢測及其對后續(xù)室內(nèi)污染的影響�；诖�,本文展開了影響漆膜VOC殘留含量的影響因素和殘留含量測定方法等的研究。 以重力法和環(huán)境小室法進行空間內(nèi)濕漆膜散發(fā)實驗,結(jié)果發(fā)現(xiàn),漆膜厚度、環(huán)境濕度、含水量和VOC的揮發(fā)性都能對漆膜殘留有不同程度的影響。濕漆膜的干化由散發(fā)控制階段向內(nèi)部擴散控制階段轉(zhuǎn)變,漆膜厚度在進入擴散控制階段后才開始對殘留含量產(chǎn)生影響,表現(xiàn)為漆膜越厚,殘留含量越高。最后,慢揮發(fā)型(揮發(fā)壓較低)VOC在漆膜干化后的有更多的殘留,而易揮發(fā)的苯系物則很容易在油漆干化過程中散發(fā)完畢。說明研究水性涂料的長期散發(fā)應(yīng)當(dāng)更關(guān)注揮發(fā)壓較低的VOC。。 觀察乳膠漆濕膜在微池小室中的VOC濃度隨時間變化。用理論估算殘留和空白添加實驗對甲醇萃取和微池?zé)彷腿》ㄓ糜诟善崮埩艉繖z測進行了比較。微池?zé)彷腿》ㄈ〉昧撕屠碚撝迪喈?dāng)?shù)妮腿×?甲醇萃取法有良好的平行性和回收率。 氣液平衡特性曲線是濕涂料散發(fā)的一個重要參數(shù)。本研究設(shè)計了6.76L的不銹鋼小室,并嘗試用手持式光離子VOC檢測儀對小室內(nèi)丙二醇水溶液進行氣相熱平衡進行快速測定,得到26℃下丙二醇的蒸汽壓為16.2Pa(0.1216mmHg)和亨利常數(shù)為7.48×106。這兩數(shù)據(jù)與文獻(xiàn)結(jié)果相符合,證明了方法的可行性。 文章最后對主要工作進行了總結(jié),分析了存在的不足以及對后續(xù)研究的展望。
[Abstract]:Coating VOC is an important source of indoor environmental pollution. In recent years, although the more environmentally friendly water-based paint has been widely used, the use frequency of oil paint has been reduced. However, water-based lacquer can not achieve real "zero pollution". The research of domestic and foreign scholars mainly focuses on the distribution of wet film VOC. No attention has been paid to the detection of VOC residue in dry paint film and its influence on indoor pollution. Based on this, the factors affecting the residual content of VOC in paint film and the determination method of residual content were studied in this paper. The wet film distribution experiments were carried out by gravity method and environmental chamber method. The results showed that the film thickness and environmental humidity were obtained. The moisture content and the volatility of VOC can affect the film residue in varying degrees. The drying of wet paint film changes from the stage of emission control to the stage of internal diffusion control. After entering the diffusion control stage, the thickness of the paint film began to affect the residual content, which showed that the thicker the film, the higher the residual content. Finally. Slow volatilization (low volatile pressure) VOC has more residue after film drying. The volatile benzenes are easily distributed in the drying process of the paint. It shows that the study of the long-term emission of water-based coatings should pay more attention to VOC.whose volatile pressure is lower. The VOC concentration of wet film of latex paint in microcell chamber was observed with time. The methanol-extraction method and micro-cell thermal extraction method were used to detect the residual content of dry paint film by theoretical estimation and blank addition experiments. The extraction amount obtained by the pool thermal extraction method is equivalent to the theoretical value. Methanol extraction has good parallelism and recovery. The gas-liquid equilibrium characteristic curve is an important parameter of wet coating emission. A 6.76L stainless steel chamber was designed in this study. A portable VOC detector was used to determine the gas phase thermal equilibrium of propylene glycol aqueous solution in a small room. The vapor pressure of propanediol at 26 鈩，

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