摘要
针对木塑复合材料力学性能较低和湿热环境下易变形的不足,研究了矿物填料和木粉混杂增强高密度聚乙烯(HDPE)木塑复合材料的力学性能和湿热特性,初步分析了矿物填料微观结构和增强作用的关联关系。结果表明,添加矿物填料对木塑复合材料的弯曲、拉伸和冲击性能有不同程度的改善作用,对模量的提高尤为明显。具有丝束或丝絮状纤维结构的海泡石、硅铝酸纤维和硅灰石对木塑复合材料的增强作用要低于具有长条状纤维结构的水镁石纤维,纤维缠结导致的分散困难可能是其增强作用差的主要原因。海泡石对耐热温度和洛氏硬度的提高作用要优于其它矿物填料,添加了25份海泡石纤维的木塑复合材料的硬度和耐热温度分别提高57. 7%和26%。
Focusing on the lowmechanical properties and the lack of easy deformation in hot and humid environment of woodplastic,the effects of different mineral fillers and wood powder on the mechanical and heat resistance of wood powder reinforced high density polyethylene composites were studied, and the enhancement mechanism was preliminarily analyzed considering the different microstructure of mineral fillers. The results showthat the bending,tensile,impact strength and especially the modulus of wood plastic composites( WPC) could be improved by the mineral fillers. The strengthening effect of brucite fiber with long strip fiber structure is more obvious than that of sepiolite,aluminium silicate and wollastonite fiber with filamentous structure,the difficulty of dispersion caused by fiber entanglement of those mineral fiber may be the reason for its poor enhancement on WPC. The hardness and heat resistance temperature of wood plastic composites with 25 phr sepiolite fiber could increase 57. 7%and 26%,respectively,which is better than other mineral fillers.
作者
张靠民
孙金鹏
李如燕
赵焱
ZHANG Kao-min;SUN Jin-peng;LI Ru-yan;ZHAO Yan(College of Aviation,Kunming University of Science and Technology,Kunming 650504,China;National Engineering Research Center of Waste Resource Recovery,Kunming University of Science and Technology,Kunming 650033,China;College of Material and Engineering,North China Institute of Aerospace Engineering,Langfang 065000,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2020年第2期158-163,共6页
China Plastics Industry
基金
国家自然科学基金(51563013)
昆明理工大学自然科学研究基金(2016-4-x-7)。
关键词
复合材料
矿物纤维
造粒
塑料
耐热温度
Composites
Mineral Fiber
Granulation
Plastic
Heat-Resistant Temperature
