人造板材甲醛释放参数及温度的影响  

Formaldehyde emission parameters of wood-based panels and influence of temperature

作　　者：池东[1] 李立清[1] 刘峥[1] 马卫武[1] 姚小龙[1] 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2015年第2期751-758,共8页Journal of Central South University:Science and Technology

基　　金：APEC科技产业合作基金资助项目(313001022);国家自然科学基金资助项目(20976200);长沙市重点科技项目(2010XK4002)~~

摘　　要：采用1 m3的小型环境模拟舱,测试不同温度下胶合板、密度板、复合地板和细木工板中甲醛释放规律。利用不同温度下板材在密闭环境舱散发过程和平衡状态质量浓度,求解影响板材释放特性的关键释放参数即甲醛可散发初始质量浓度ρm,0、扩散系数Dm和分配系数K;讨论释放参数与温度的关系,并推导计算关联式。研究结果表明：甲醛质量浓度在初始时刻（0~3 h）均迅速增大,随后速度慢慢减小,最后趋于恒定值;温度升高会促进板材内甲醛释放,温度每升高5℃,甲醛释放量会增加10%~30%;通过预测30℃下4种板材的甲醛释放参数,预测结果与实验测试结果较吻合。The measurements of formaldehyde emission from plywood, density board, laminate flooring and block board were obtained using the 1 m3 small chamber at different temperatures. The key parameters, i.e. the initial mobile mass concentration Pm0, the diffusion coefficient D,, and the partition coefficient K were calculated by using the emission process and equilibrium concentration in the closed environment chamber at a series of loading degrees and temperatures, and the correlations between emission parameters and temperature were calculated. The results show that quick emission of formaldehyde occurs initially （0-3 h）, and tends to decrease over time. Higher temperatures facilitate formaldehyde emission from wood-based panels, and total emissions increase 10%-30% with temperature increase of 5 ℃. The simulated results are in accord with those of experiment, which proves that the emission parameters obtained are accurate and reliable.

关 键 词：甲醛 人造板 释放参数 密闭环境舱 

分 类 号：TS67[轻工技术与工程]