人造板甲醛释放灰色模型

Grey model for formaldehyde emission from wood-based panels

采用1 m3的小型环境模拟舱,在不同温度和装载度下,对胶合板、细木工板和密度板中甲醛释放过程进行测试。通过灰色关联分析法,比较不同时间段温度和装载度对甲醛浓度的影响程度;构建人造板材甲醛释放GM（1,1）,DGM（1,1）和SCGM（1,1）灰色模型,对甲醛释放规律进行模拟和预测。研究结果表明：甲醛浓度在初始时刻（0~2 h）均迅速增大,随后速度增量慢慢减小,最后趋于恒定值;温度升高会促进板材内甲醛释放,而装载度增大则会减少单位体积板材内甲醛的释放量;3种板材中胶合板和密度板的甲醛释放量较大,且达到平衡时间较短。GM（1,1）和DGM（1,1）模型对人造板甲醛释放都有较高的模拟和预测精度,可以用来对甲醛释放过程进行模拟和预测。但SCGM（1,1）模型只适合用于密度板短期时间内的模拟,不适合用于3种板材甲醛释放的预测。

The measurements of formaldehyde emission from plywood, block board and density board were obtained using the 1 m3 small chamber at different temperatures and loading degrees. The contribution level of temperature and loading degree influencing the concentration in different time was analyzed with grey relativity analysis method. The grey model GM（1,1）, DGM（1,1） and SCGM（1,1） were built to simulate and forecast formaldehyde emission. The results show that quick emission of formaldehyde is observed in the beginning （0-2 h）, and then tending to decrease with time. Higher temperature will facilitate formaldehyde emission from wood-based panels, while the formaldehyde emitted from unit volume panel decrease at higher loading degree. Of all the three type panels, the plywood and density board emit more formaldehyde, and the concentration gets stable in shorter time. Mostly the model GM （1, 1） and DGM （1, 1） have larger model accuracy and can be used for simulation and forecast, while the model SCGM （1, 1） only has larger model accuracy when it is used to simulate formaldehyde emitted from density board in short time, also the model SCGM （1, 1） is not suitable for forecasting formaldehyde emission from any panel.