CaCO_3粒子对天然纤维增强柔性复合地板性能的影响  

Effects of CaCO_3 particle to the performance of flexible composite floor reinforced by natural fiber

作　　者：何洪城[1] 邓腊云[1] 袁光明[2] 

机构地区：[1]湖南省林业科学院,湖南长沙410004 [2]中南林业科技大学材料科学与工程学院,湖南长沙410018

出　　处：《中南林业科技大学学报》2017年第11期167-171,186,共6页Journal of Central South University of Forestry & Technology

基　　金：国家林业公益性行业科研专项经费项目(201504503);国家自然科学基金项目(3137056)

摘　　要：以天然植物纤维制备的纤维增强柔性复合地板作为一种新型绿色环保复合地板受到越来越多的关注,纤维增强柔性复合地板为木竹加工剩余物、秸秆和麻类等农业废弃物的高效利用提供了新途径。添加剂CaCO_3粒子对纤维增强柔性复合地板的性能有重要影响,通过设置不同粒径的CaCO_3粒子及粒径分布研究其对产品力学性能及物理性能的影响。结果表明:CaCO_3粒子粒径及分布最佳配比工艺是25%含量的粒径48μm粒子、25%含量的粒径106μm粒子、50%含量的粒径160μm粒子,在此工艺参数下获得的弯曲强度、弹性模量、冲击强度和内结合强度分别为27.2 MPa、1 679 MPa、13.6 k J/m2和1.68 MPa,吸水厚度膨胀率为1.56%,热膨胀率为0.98%,密度为0.72 g/cm3。添加CaCO_3粒子的天然纤维复合材料具有良好的力学性能和物理性能。Flexible composite floor reinforced by natural fiber, produced from natural plants, is a kind of new green and environmental composite floor, which has been attracting more and more attention in the decorative materials. The products also make an efficient solution of utilization to wastes from natural plants, such as wood and bamboo wastes, straw and hemp hurds. The additive CaCO3 particle plays key role in the performance of flexible natural fiber composite floor. In this work, the effects of CaCO~ size and distribution were investigated. The best particle size and distributions of limestone are 25 wt% of 48μm, 25 wt% of 106 μm, and 50 wt% of 160 μm. The features of the as-obtained composite was tested as follows： MOR 27.2 MPa, MOE 1679 MPa, shock strength 13.6 kJ/m2, internal bonding strength 1.68 MPa, thickness swelling 1.56%, thermo expansion ratio 0.98%, and density 0.72 g/cm3. The composite has good performance of mechanical and physical properties.

关 键 词：CaCO3粒子 柔性复合地板 天然纤维 性能 

分 类 号：S781.63[农业科学—木材科学与技术]