乙酸酐处理棉秆皮纤维增强聚丙烯复合材料的制备及性能研究

以棉秆皮纤维为增强相、聚丙烯为基体相，制备4 mm厚、棉杆皮纤维含量为 30 %（质量分数，下同）的聚丙烯/棉秆皮纤维复合材料薄片，棉秆皮纤维先经NaOH预处理，再经过乙酸酐（浴比30∶1、浸泡30 min、温度30 ℃）改性处理后，复合材料的拉伸断裂强度和弯曲断裂强度都达到最高，相比未改性的分别增大了6.33 %和11.72 %。

Preparation and Characterizations of Polypropylene Composites Reinforced with Cotton Bast Fibers Treated by Acetic Anhydride

Cotton bast fiber treated with acetic anhydride was used as a reinforcer of polypropylene forming composite sheet of 4 mm thick， when the content of cotton bast fiber was 30 wt%. The cotton bast fiber was treated in a NaOH solution, and subsequently in a bath of acetic anhydride for 30 min at 30 ℃. The composite sheet acquired excellent tensile and bend strengths， increased by 6.33 % and 11.72 %, respectively.