Characteristics of VOC Emission from Plywood in Different Environment Factors | 不同外部环境因素下胶合板VOC的释放特性

Chinese. 以胶合板为研究对象,采用小环境舱法,利用气相色谱质谱联用仪（GC/MS）检测胶合板在不同温度（18,23,28℃）、相对湿度（35%,50%,60%,75%）和气体交换率（0.5,1,2h-1）条件下的VOC释放速率,探究胶合板释放的不同种类VOC在不同环境条件下的释放特性。结果表明：提高温度、相对湿度和气体交换率能够加速板材VOC释放,释放初期影响显著,后期影响减弱。芳烃类化合物释放速率高于烷烃类化合物,芳烃类化合物受环境因素影响程度大。甲苯释放速率最大,对（间）二甲苯居中,乙苯最小。3种环境因素对3种单体影响程度差异不大。

English. In this study, the impact of temperature （ T = 18, 23, and 28 ℃ ）, relative humidity （ RH = 35% , 50% , 60% , and 75% ）, and air exchange rate（ ACH = 0. 5, t, and 2 h -1 ） on the volatile organic compound（ VOC ） emission rate and concentration from plywood were investigated by small chamber testing for 5 days. Gas chromatography-mass spectrometer（GC-MS） was used to measure components of total volatile organic compound（TVOC）. The experiment result showed that increasing temperature, RH and ACH accelerated VOC emission from plywood. The influence of environmental factors on VOC emission was only significant for initial emission. Few days later, the effect was not obvious. Arene compounds were the main compounds of TVOC emission from plywood, and the content of alkane compounds were the second. The emission rate of arene compounds was higher than that of alkane compounds. Environmental factors affected arenas compounds emission rate more obviously than alkane compounds. Toluene emission rate was the highest, m,p-xylene was the second, and the ethylbenzene was third. The influence of environmental factors on these three compounds had no major differences.