采用热脱附-气相色谱/质谱联机技术(TD-GC/MS)分析了杨木粉在不同环境温度下的挥发物释放行为.结果表明:杨木粉在40℃及90℃时的挥发物中,主要有害成分比主要有益成分比例高,有害成分约为有益成分的1.7倍；60℃时主要有益成分与主要有害成分比例相当,而160℃时的主要有益成分为有害成分的5.42倍.以杨木粉为基材,在木质素软化温度点和木质材料炭化温度点之间(150～180℃)实施高压无胶模塑成形制备木质粉末基复合材料必将体现出良好的环境友好性.%The volatiles release behavior of poplar powder has been studied by TD-GC/MS online technique at different temperatures. The results show that the proportion of main harmful components was higher than that of beneficial in the volatiles of poplar powder at 40℃ and 90 ℃, the harmful components was 1.7 times higher than beneficial components. The proportions of main beneficial and harmful components were equivalent at 60 ℃, while the main beneficial components was 5.42 times higher than that of harmful. Taking poplar wood powder as substrate to prepare wood powder-based composites by high-pressure no-gel molding compaction between the temperature of lignin softening point and wood materials carbonization (about 150 ~ 180 ℃ ) can present a satisfactory environmental friendliness.
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