棉秆形态对棉秆/回收塑料复合板性能的影响

Effect of cotton stalk pattern and screening size on properties of cotton stalk/recycled plastic composite panels

采用2种不同工艺形态(搓丝纤维态和刨花态)的棉秆与聚乙烯塑料复合,制备棉秆/回收塑料复合板材,研究了棉秆形态和筛分值对复合板材物理力学性能的影响。结果表明:(1)筛分过的棉秆搓丝和刨花制备复合板材的各项物理力学性能均优于未筛分的棉秆搓丝与刨花制备出的复合板材;(2)棉秆刨花制备复合板材的各项物理力学性能均优于棉秆搓丝制备出的复合板材;(3)基材表面覆单板之后复合板材的MOR达到42.2 MPa,MOE达到6 010 MPa,24 h TS为8.11%,IB为1.19 MPa,均满足刨花板国家标准GB/T 4897.7-2003——在潮湿状态下使用的增强结构用板的性能指标。

Cotton stalk particles and cotton stalk fibers were compounded with recycled polyethylene separately and 2 kinds of cotton stalk/plastic composite panels were formed using hot pressing.The effects of different cotton stalk shapes and screening of cotton stalk on the properties of the composite panels were evaluated.The results showed that：（1） The physical and mechanical properties of the composite panels made of screened fibers or particles were better than those of the unscreened fibers or particles.（2） The physical and mechanical properties of the composite panels made of cotton stalk particles were better than those of cotton stalk fibers.（3） The properties of the composite panels covered with poplar veneers on the surface,such as MOR was 42.2 MPa,MOE was 6 010 MPa,24 h TS was 8.11%,IB was 1.19 MPa,could meet the demanded values of the particleboard for load-bearing boards for use in humid conditions according to National Standards GB/T 4897.7-2003.