稻壳基二氧化硅对高密度聚乙烯复合材料摩擦性能的影响

Effect of Rice Husk-Based Silica on the Friction Properties of High Density Polyethylene Composites.

作者信息

Shi Yafei, Qian Miaomiao, Wang Xinru, Zhang Wanjia, Zhang Xuewei, Wang Xiaofeng, Zhu Yanchao

机构信息

College of Chemistry, Jilin University, Changchun 130012, China.

State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China.

出版信息

Materials (Basel). 2022 Apr 28;15(9):3191. doi: 10.3390/ma15093191.

DOI:10.3390/ma15093191

PMID:35591522

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9099483/

Abstract

Rice husk ash (RHA)-reinforced composites are now used in many tribological applications. We prepared two kinds of RHAs using different pretreatment and the same pyrolysis process, namely water-treated RHA (WRHA) and acid-treated RHA (ARHA). Comparing the two RHAs, the RHA pretreated with hydrochloric acid (HCl) was found to have a smaller particle size and a more uniform dispersion. Accordingly, the two kinds of RHAs were used as fillers and added to the high-density polyethylene (HDPE) matrix by an extrusion process. The results showed that the friction coefficient (COF) value of the composites with ARHA was reduced to 0.12 when an additional amount of 0.75 wt.% or 1.5 wt.%. WRHA was used as a filler to the amount of 1.5 wt.%, but the COF value was raised to about 0.21. The reason for this phenomenon may be due to its larger particle size and more severe abrasive wear. This work provides a method for making natural biomass fillers that can effectively reduce the COF of HDPE composites with slight decreases in mechanical properties.

摘要

稻壳灰（RHA）增强复合材料目前在许多摩擦学应用中得到使用。我们使用不同的预处理方法和相同的热解工艺制备了两种稻壳灰，即水处理稻壳灰（WRHA）和酸处理稻壳灰（ARHA）。比较这两种稻壳灰，发现用盐酸（HCl）预处理的稻壳灰具有更小的粒径和更均匀的分散性。因此，将这两种稻壳灰用作填料，并通过挤出工艺添加到高密度聚乙烯（HDPE）基体中。结果表明，当额外添加量为0.75 wt.% 或1.5 wt.% 时，含ARHA的复合材料的摩擦系数（COF）值降低到0.12。当WRHA用作填料的量为1.5 wt.% 时，COF值升高到约为0.21。这种现象的原因可能是由于其较大的粒径和更严重的磨粒磨损。这项工作提供了一种制备天然生物质填料的方法，该方法可以有效降低HDPE复合材料的COF，同时机械性能略有下降。