宜春原油投资协会

【2017-0331】汉麻纤维表面改性对其增强聚丙烯复合材料性能及VOC释放影响

中国复合材料学会2019-01-10 15:04:26

《复合材料学报》优先在线发表论文。


  要:通过非织造-热压工艺制备了汉麻纤维增强聚丙烯(HF/PP)复合材料。采用热重-质谱联用仪(TG-MS)研究了HF/PP复合材料的挥发性有机化合物(Volatile Organic Compounds,VOC)释放来源及汉麻经聚乙烯醇(PVA)改性和尿素改性对HF/PP复合材料的VOC释放的影响,同时研究了两种改性方法对HF/PP复合材料热学性能以及力学性能的影响。结果表明:HF/PP复合材料中的VOC主要来源于汉麻纤维,改性后的HF/PP复合材料力学性能相比未处理均出现了不同程度的提升,尿素改性后HF/PP复合材料的拉伸强度和弯曲强度达到最大值,分别较未处理提升了19.32%和15.04%。PVA改性后HF/PP复合材料的拉伸模量、弯曲模量和剪切强度达到最大值,相比未改性分别提升了17.72%、15.94%和24.72%。改性后HF/PP复合材料热稳定性能以及VOC释放相较未处理均得到了优化:PVA改性后HF/PP复合材料热稳定性最优,三个阶段总活化能较未处理提高了121.99%,达到了392.56kJ·mol-1,并且HF/PP复合材料热稳定性与界面性能密切相关;尿素及PVA改性后HF/PP复合材料的总VOC(TVOC)释放量相较未处理都出现了降低。


关键字:挥发性有机化合物;汉麻;聚丙烯;复合材料;改性


Abstract: Hemp fiber/polypropylene(HF/PP) composites were prepared via non-woven and compressing technology. The volatile organic compounds(VOC) emission source of HF/PP composites was studied and TG-mass spectrometry (TG-MS) was used to study the effect of PVA and urea modification on the VOC emission of HF/PP composites. At the same time the effect of the above methods on the mechanical and thermal properties of HF/PP composites were investigated too. The results reveal that the VOC emission of HF/PP composites mainly come from HF. Compared with the untreated composite, the mechanical properties of the modified HF/PP composites are improved. The tensile strength and flexural strength of the composite reach the maximum value after urea modification which increased 19.32% and 15.04% compared with untreated. The tensile modulus, flexural modulus and impact strength of the HF/PP composite reach the maximum value after PVA modification which increased 17.72%、15.94% and 24.72% compared with untreated. The thermal stability and VOC emission of the modified HF/PP composites are optimized after modification. The HF/PP composite attains the optimal thermal stability after PVA modification, and the total activation energy increased 121.99% compared with untreated, and reaches to 392.56 kJ·mol-1. The thermal stability of HF/PP composites are closely related to its interfacial properties. The total VOC cumulative emission of modified HF/PP composites decrease compared with untreated, and the urea modified composite exhibits the best effect.


Keywords: volatile organic compounds; hemp fiber; polypropylene; composite; modification


作者:王春红等,天津工业大学 纺织学院,天津

通讯作者:王春红,天津工业大学 纺织学院,天津

全文详见中国知网学术期刊优先数字出版。