以园林废弃物为原料,热解油脲醛树脂作为胶粘剂,制备了一种新型的裸土覆盖用有机覆盖垫产品。以热压温度、热压压力、热压时间及施胶量为考察因素,以抗压强度、保水性和甲醛释放量为评价指标,优选出有机覆盖垫的最佳制备工艺。结果表明,有机覆盖垫的最佳制备工艺为热压温度140℃,热压压力0.7MPa,热压时间7min和施胶量10%(相对于有机覆盖垫原料质量百分数)。在此工艺条件下制备的有机覆盖垫强度大于体重100kg实验者行走时对地面的最大压强(约0.52MPa),甲醛释放量达到国标E1级标准(≤1.5mg/L),保水性良好(≥40%)。
A new organic mulch mat used for bare soil coverage was prepared used the garden waste as main raw material and the bio-oil urea-formaldehyde resin as adhesive.The hot pressing temperature,hot pressing pressure,hot pressing time and sizing amount were chosen as experimental factors to carry out the orthogonal tests based on their compressive strength,water retention and formaldehyde emission content.The results showed that the optimal heat pressing temperature,pressure,time and adhesive content were 140℃,0.7MPa,7min and 10% (percentage of raw material mass relative to an organic mulch mat),respectively.Under the optimized condition,the compressive strength of organic mulch mat was higher than the maximum pressure (about 0.52MPa) when the experimental person (100kg of weight) was walking on the ground.The formaldehyde emission content was corresponded to E1 level (≤1.5mg/L) of national standard and the water retention performance ofh mat was nice (≥40%).
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基金资助
北京市科技计划项目(Z161100001316004)
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