混合木粉质量比对木塑复合材料性能的影响
Influence of ratio of hybrid wood flour on physical and mechanical properties of wood-plastic composites
曹岩 1徐海龙 2郝建秀 3李利芬4
作者信息
- 1. 贵州民族大学材料科学与工程学院,贵州 贵阳550025;贵州民族大学贵州省优势生物质材料开发与利用特色重点实验室,贵州 贵阳550025
- 2. 贵州民族大学数据科学与信息工程学院,贵州 贵阳550025
- 3. 东北林业大学生物质材料科学与技术教育部重点实验室,黑龙江 哈尔滨150040
- 4. 贵州大学林学院,贵州 贵阳550025
- 折叠
摘要
为了更好地利用贵州省主要森林抚育间伐、木材加工剩余物,达到缓解环境污染、提高材料附加值、创造良好经济效益的目的,采用挤出成型法制备马尾松和杉木的混合木粉增强高密度聚乙烯(HDPE)复合材料,研究马尾松和杉木木粉质量比对复合材料的密度、颜色、尺寸稳定性、弯曲、拉伸和冲击性能的影响,分析了复合材料的动态力学性能.结果表明,减小马尾松和杉木的质量比,复合材料的密度相差不大,而表面明度值和黄蓝轴色度指数均呈现减小趋势;杉木木粉/WPC复合材料的吸水尺寸稳定性较好,24 h吸水率和吸水厚度膨胀率分别为2.412％和1.411％,更适合在户外潮湿环境中使用; 随着马尾松木粉含量从60％逐渐减小到0,复合材料的储能模量升高,损耗模量和损耗角正切值降低,力学性能逐渐增强,静曲强度(MOR)和静曲模量(MOE)分别提高了47.58％和25.00％,拉伸强度和拉伸模量分别提高了92.52％和120.00％,冲击强度提高了70.03％.
Abstract
Utilize their thinning residues and wood processing remains to prepare composites would contribute to reducing of environmental pollution,increasing the added value,and creating a good economic benefit.Pinus massoniana and Cunninghamia lanceolata flour were mixed and then used to reinforce high-density polyethylene(HDPE)by extrusion method.The effects of P.massoniana/C.lanceolata flour ratio on the density,color and dimension stability,bending property,tensile property,and impact strength of the result composites were evaluated.Dynamic mechanical properties of the composites were also analyzed.The results showed that when the proportion of P.massoniana flour reduced,there was no difference in the density of the composites,however,the surface lightness value and yellow blue axis chromatic index showed a trend of decrease.The water-absorbing dimensional stability of C.lanceolata flour/HDPE composite was good as the water absorption rate and water absorption swelling of 24 h were 2.412％and 1.411％,respectively,which proved the composite was suitable to use in outdoor humid environment.As P.massoniana flour content decreased,the composite increased in storage modulus,decreased in both loss modulus and loss tangent,and improved its mechanical performance.Comparing to the composite containing 60％P.massoniana flour,the composite without P.massoniana flour increased in modulus of rupture(MOR)and modulus of elasticity(MOE)by 47.58％and 25.00％,respectively,tensile strength and modulus by 92.52％and 120.00％,respectively,the impact strength by 70.03％.
关键词
马尾松/杉木/混合木粉/质量比/木塑复合材料/物理性能/力学性能Key words
Pinus massoniana Lamb./Cunninghamia lanceolata ( Lamb.) Hook./hybrid wood flour/mass ratio/wood-plastic composite/physical properties/mechanical properties引用本文复制引用
基金项目
国家自然科学基金(31460171)
贵州省科学技术基金计划(黔科合J字[2015]2075)
贵州省教育厅项目(黔教合KY字[2016]003)
贵州省教育厅项目(黔教合KY字[2017]003)
贵州省教育厅项目(黔教合KY字[2017]136)
贵州民族大学教改项目(GUN2016JG29)
贵州大学引进人才项目(贵大人基合字[2015]66)
出版年
2018
国家科技期刊平台
NSTL
维普
万方数据