摘要
以稻草纤维及丙烯腈-丁二烯-苯乙烯(ABS)为原料,分别以活性炭、Al2O3、SiO2为改性剂,通过混炼-模压工艺制备了稻草纤维/ABS复合材料,采用热重-质谱联用仪对复合材料的挥发性有机化合物(VOC)释放情况进行对比分析,探讨了几种改性剂对稻草纤维/ABS复合材料VOC释放的影响。研究发现:ABS及稻草纤维均能在热解过程中释放CH_2O、C_2H_4O及C3H4O,而C_6H_6、C_7H_8、C_8H_8等苯类及烷烃类物质的释放源则主要为ABS;活性炭的添加能够显著降低稻草纤维/ABS复合材料的VOC释放,其VOC释放总量降低了55.5%;Al2O3和SiO2虽然能比较明显地降低复合材料中苯类物质的释放含量,分别降低了32.4%和30.9%,但是其中的Fe、Cu等金属杂质却能够催化醛类物质的产生,导致VOC释放总量分别增加了11.8%和235.7%。
The rice straw fiber and acrylonitrile-butadiene-styrene(ABS)were used as the raw materials,the acticarbon,Al2 O3,SiO2 were used as the modifiers,respectively,the straw fiber/ABS composites were prepared via mixing molding process,The thermogravimetric-mass spectrometry combined instrument was used to compare and analyse the volatile organic compounds(VOC)release of straw fiber/ABS composites,and the effect of VOC release from composites by several different kinds of modifiers was researched.The results show that ABS and straw fibers can release CH_2O,C_2H_4O and C_3H_4O during the pyrolysis.The main source of the release of benzene and alkanes such as C_6H_6,C_7H_8 and C_8H_8 is ABS;the addition of activated carbon could significantly reduce the VOC release of straw fiber/ABS composites,and the total VOC release decreases by 55.5%.Al2 O3 and SiO2 can obviously reduce the release content of benzene in the straw fiber/ABS composite,the content of benzene is 32.4% and 30.9%,respectively.However,metal impurities such as Fe and Cu can catalyze the generation of aldehydes,resulting in increasing VOC emissions by 11.8% and 235.7%,respectively.
引文
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