处理过的竹纤维增强高密度聚乙烯复合材料的力学性能和吸水行为。

Mechanical performance and water uptake behaviour of treated bamboo fibre-reinforced high-density polyethylene composites.

作者信息

Daramola O O, Akinwekomi A D, Adediran A A, Akindote-White O, Sadiku E R

机构信息

Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure 340001, Nigeria.

Institute of NanoEngineering Research (INER), Department of Chemical, Metallurgical and Materials Engineering (Polymer Division), Tshwane University of Technology, Pretoria, South Africa and the Tooling Centre Soshanguve Campus, Tshwane University of Technology, Pretoria 117, South Africa.

出版信息

Heliyon. 2019 Jul 3;5(7):e02028. doi: 10.1016/j.heliyon.2019.e02028. eCollection 2019 Jul.

DOI:10.1016/j.heliyon.2019.e02028

PMID:31317082

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6611916/

Abstract

High density polyethylene (HDPE) composites reinforced with short bamboo fibre (BF) were fabricated by compression moulding technique. BF were extracted from bamboo culm and treated with 0.5 M NaOH. The composites were developed by melt-compounding various weight fractions (2, 4, 6, 8 and 10 wt.%) of the treated BF with HDPE with the aid of single screw laboratory extruder at a temperature of 180-220 °C. The extrudates were thereafter moulded into various test specimens with the aid of carver laboratory press at a temperature of 230 °C and applied pressure of 0.2 kPa for 10 min. Effect of the treated BF on the mechanical properties and water uptake behaviour of the composites were studied. The results revealed that there was enhancement in the mechanical properties from 2 - 4 wt.% of BF while the water absorption rate increased with increase in the fibre weight fraction. The morphology of the composites showed that there was a homogenous dispersion of BF at lower weight fraction, although fibre agglomeration was noticed at higher weight fraction. The results of this study revealed that treated bamboo fibres are suitable for reinforcing HDPE.

摘要

采用模压工艺制备了短竹纤维（BF）增强高密度聚乙烯（HDPE）复合材料。竹纤维从竹茎中提取，并用0.5M的NaOH进行处理。借助单螺杆实验室挤出机，在180-220°C的温度下，将不同重量分数（2、4、6、8和10 wt.%）的处理过的竹纤维与HDPE进行熔融共混，从而制备复合材料。随后，借助卡弗实验室压力机，在230°C的温度和0.2 kPa的施加压力下保持10分钟，将挤出物模塑成各种测试样品。研究了处理过的竹纤维对复合材料力学性能和吸水性的影响。结果表明，当竹纤维含量为2-4 wt.%时，复合材料的力学性能有所提高，而吸水率则随着纤维重量分数的增加而增加。复合材料的形态表明，在较低重量分数下，竹纤维分散均匀，不过在较高重量分数下会出现纤维团聚现象。该研究结果表明，处理过的竹纤维适用于增强HDPE。