水性涂料VOC测试的影响因素及特征VOC的筛选研究

Study on Influencing Factors and Characteristic VOC Screening of Water-Based Coatings

综合国标方法,建立了气相色谱-质谱法(GC-MS)测定水性涂料中挥发性有机化合物的分析方法。采用内标法,对市面上常见的四类水性涂料,分别为水性内墙涂料、水性外墙涂料、水性防水涂料、水性木器涂料进行定性定量分析及测试过程中影响因素探讨。结果表明,水性涂料VOC测试中的主要影响因素为内标物选择、特征有机物的校准因子以及仪器条件。优化测试条件后发现,内外墙涂料中主要有机物为乙二醇、1,2丙二醇、2-氨基-2-甲基-1-丙醇;水性防水涂料中主要有机物为正丁醇、乙二醇、丙二醇甲醚、正丁醚、乙酸丁酯、丙烯酸丁酯、丙酸丁酯;水性木器涂料中的特征有机物为三乙胺、1,2-丙二醇、二丙二醇甲醚、丙二醇甲醚醋酸酯、1-(2-甲氧基-1-甲基乙氧基)异丙醇、2-(2-羟基丙氧基)-1-丙醇、1,1'-[(1-甲基-1,2-乙亚基)二(氧)]二-(2-丙醇)、乙二醇单丁醚、二乙二醇丁醚等。

Based on the national standard method,a method for the determination of volatile organic compounds in waterborne coatings by gas chromatography-mass spectrometry(GC-MS)was established.The internal standard method was used to carry out qualitative and quantitative analysis of four common waterborne coatings in the market,including waterborne interior wall coatings,waterborne exterior wall coatings,waterborne waterproof coatings,and waterborne wood coatings,and to discuss the influencing factors in the test process.The results showed that the main influencing factors in the VOC tests of waterborne coatings are the selection of internal standard substances,the calibration factors of characteristic organic compounds,and the instrument conditions.After optimizing the test conditions,the test results showed that the main organic compounds in the interior and exterior wall coatings are ethylene glycol,1,2-propylene glycol,2-amino-2-methyl-1-propanol;The main organic compounds in the waterborne waterproof coatings are n-butanol,ethylene glycol,propylene glycol methyl ether,n-butyl ether,butyl acetate,butyl acrylate,and butyl propionate;The characteristic organic compounds in the waterborne wood coatings are triethylamine,1,2-propylene glycol,dipropylene glycol methyl ether,propylene glycol methyl ether acetate,1-(2-methoxy-1-methylethoxy)isopropylalcohol,2-(2-hydroxypropyl)-1-propanol,1,1'-[(1-methyl-1,2-ethylsubunit)bis(oxy)]2-(2-propanol),ethylene glycol monobutyl ether,diethylene glycol butyl ether,etc.