森林与环境学报2017，Vol.37Issue(3)：266-271,6.DOI:10.13324/j.cnki.jfcf.2017.03.002
木粉热处理对WPC耐腐性能及力学性能的影响
Influence of thermally treated of wood flour on decay resistance and mechanical properties of wood plastic composites
摘要
Abstract
In this paper, the wood flour(WF) of Pinus massoniana Lamb.were thermally treated at 180~220 ℃ for 0, 1, 2 and 3 h, respectively, then the thermally treated WF was mixed with HDPE to produce WF/HDPE composites (WPC).The decay resistance against the white-rot(Trametes versicolor) and brown-rot(Antrodia sinuosa) fungi, the flexural modulus of rupture and modulus of elasticity of the composites were investigated, and the microstructure of the composites before and after being infected by the 2 evaluated fungi were observed by environmental scanning electron microscope(ESEM).The results showed that thermal treatment temperature and time significantly influenced the mass loss rate (P<0.05), but the stains has no significant variation(P>0.05).It was observed that the mass loss rate of the composites made with WF heat treated all had a decreasing trends compared to reference samples, and their difference varied as the processing temperature increase and time lengthening, the mass loss rate of the composites made with WF treated at 200 ℃ for 3 h infected by T.versicolor and A.sinuosa were the lowest than the other treatments with a decrease rate 53.52% and 57.83% compared to CK, respectively.ESEM observation of fungi growth on the surface of composites before and after being infected by the two fungi also suggested that thermal treatment also improved the decay resistance against the fungi.The results of the flexural properties of the composites showed that the flexural modulus of rupture decreased after WF were treated with the biggest 4.57% decrease compared to reference samples, and the modulus of elasticity of the composites filled with heat-treated WF increased at first and then decreased with the increasing thermal treatment temperature and lengthening thermal treatment time.Thermal treatment temperature and time has no significantly influenced on the flexural modulus of rupture and the modulus of elasticity.关键词
热处理/木粉/木塑复合材料/耐腐性能/质量损失率/弯曲强度/弯曲模量Key words
thermal treatment/wood flour/wood-plastic composites/decay resistance properties/mass loss rate/flexural strength/elastic modulus分类
轻工纺织引用本文复制引用
邓邵平,林姿,黄前辉,王春灿..木粉热处理对WPC耐腐性能及力学性能的影响[J].森林与环境学报,2017,37(3):266-271,6.基金项目
福建省教育厅科技项目(021989) （021989）
福建省大学生创新训练项目(111ZC1404). （111ZC1404）
