利用微波接枝CPVC复配偶联剂处理秸秆纤维表面,采用光学法液滴形态分析系统测定处理前后秸秆微粉的动态接触角及表面能变化,并制备相应的复合材料进行力学性能测试。研究结果表明:微波接枝CPVC复配偶联剂界面改性方法对秸秆纤维有较好的改性效果,改性后秸秆纤维的平衡接触角θe由74.65°上升至98.96°,从明显的亲水性转变为疏水性;而表面能则有不同程度减小,改性后秸秆纤维表面能(23.68 m J/m2)低于HDPE基体(28.61 m J/m2);经微波接枝CPVC改性后秸秆纤维复合材料保持了良好的力学性能。较透彻地了解秸秆纤维复合材料的复合界面特性及其复合机理,设计和制造不同性能、满足不同应用领域要求的纤维复合材料产品,是秸秆纤维复合材料研究工作者至今仍在继续探索的重要研究领域。 The surface of straw fiber was treated by microwave grafting CPVC coupling agent. The dynamic contact angle and surface energy change of straw micro-powder before and after treatment were measured by optical drop analysis system. And the mechanical properties of the composites were tested. The results showed that the modified method of microwave grafting CPVC complex coupling agent has better modification effect on straw fiber, the equilibrium contact angle θe of straw fiber increased from 74.65 ° to 98.96 ° after modification, (23.68 m J / m 2) is lower than that of HDPE matrix (28.61 m J / m 2). After being modified by microwave-grafted CPVC, the surface energy of the straw fiber is reduced to some extent. Straw fiber composites maintain good mechanical properties. A thorough understanding of the composite interface characteristics of straw fiber composites and its composite mechanism, design and manufacture of different properties to meet the requirements of different applications of fiber composite products, straw fiber composites researchers are still continuing to explore important research field.