摘要
采用挤出混合与注塑成型制备出不同含量的纳米Al2O3填充LDPE/POM复合材料,并进行力学和摩擦磨损性能实验。结果表明,随着纳米Al2O3的增加,LDPE/POM复合材料的缺口冲击性能先提高后降低,其中添加8%纳米Al2O3后复合材料的缺口冲击强度提高了近3倍;添加Al2O3纳米粒子后增加了复合材料的摩擦因数,但对耐磨性影响不大。由于纳米Al2O3作为刚性粒子可以提高材料的硬度,因此复合材料仍表现出良好的耐磨性;然而纳米粒子在摩擦表面富集,产生了犁沟现象,因此提高了材料的摩擦因数。
The LDPE/POM composites with different contents of nano-alumina were injected into slab specimens by ex- trusion, and their mechanical and tribological properties were studied. The results show that the notched impact strength of LDPE/POM composites is firstly increased and then decreased with the increase of nano-alumina content. The notched im- pact strength is improved three times approximately for 8% nano-alumina/LDPE/POM composites as compared to LDPE/ POM composites. LDPE/POM composites filled with nano-alumina exhibit good wear resistance but a higher friction coeffi- cient. This could be attributed to the rigid particles of nano-alumina, which help to improve the hardness of LDPE/POM composites. However, the friction coefficient is increased due to the enrichment of nanoparticles between the sliding surface and the ploughing action.
出处
《润滑与密封》
CAS
CSCD
北大核心
2012年第7期45-48,52,共5页
Lubrication Engineering
基金
广西自然科学基金项目(2009AM6028)
关键词
聚甲醛
低密度聚乙烯
纳米氧化铝
复合材料
摩擦磨损
polyoxymethylene （POM）
low density polyethylene
nano-alumina
composite
friction and wear
