Huang Runzhou, Mei Changtong, Xu Xinwu, Kärki Timo, Lee Sunyoung, Wu Qinglin
College of Material Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
Materials (Basel). 2015 Dec 8;8(12):8510-8523. doi: 10.3390/ma8125473.
Hybrid basalt fiber (BF) and Talc filled high density polyethylene (HDPE) and co-extruded wood-plastic composites (WPCs) with different BF/Talc/HDPE composition levels in the shell were prepared and their mechanical, morphological and thermal properties were characterized. Incorporating BFs into the HDPE-Talc composite substantially enhanced the thermal expansion property, flexural, tensile and dynamic modulus without causing a significant decrease in the tensile and impact strength of the composites. Strain energy estimation suggested positive and better interfacial interactions of HDPE with BFs than that with talc. The co-extruded structure design improved the mechanical properties of WPC due to the protective shell layer. The composite flexural and impact strength properties increased, and the thermal expansion decreased as BF content increased in the hybrid BF/Talc filled shells. The cone calorimetry data demonstrated that flame resistance of co-extruded WPCs was improved with the use of combined fillers in the shell layer, especially with increased loading of BFs. The combined shell filler system with BFs and Talc could offer a balance between cost and performance for co-extruded WPCs.
制备了壳层中具有不同玄武岩纤维（BF）/滑石粉/高密度聚乙烯（HDPE）组成水平的混杂玄武岩纤维和滑石粉填充的高密度聚乙烯共挤出木塑复合材料（WPC），并对其力学、形态和热性能进行了表征。将玄武岩纤维加入到HDPE-滑石粉复合材料中，显著提高了热膨胀性能、弯曲、拉伸和动态模量，同时复合材料的拉伸和冲击强度没有显著降低。应变能估计表明，HDPE与玄武岩纤维之间的界面相互作用比与滑石粉之间的更积极且更好。共挤出结构设计由于有保护壳层而改善了木塑复合材料的力学性能。随着混杂BF/滑石粉填充壳层中BF含量的增加，复合材料的弯曲和冲击强度性能提高，热膨胀降低。锥形量热法数据表明，壳层中使用组合填料，特别是增加BF的用量，提高了共挤出木塑复合材料的阻燃性。含有BF和滑石粉的组合壳层填料体系可为共挤出木塑复合材料提供成本和性能之间的平衡。
