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苄基化棉秆皮纤维因热熔粘度过高,无法有效地浸润纤维,故其自增强复合材料力学性能受到影响。分别采用聚氨酯(TPU)和蒙脱土(MMT)与苄基化棉秆皮纤维混炼制备复合材料,以提高复合材料的韧性和强度;利用SEM分别研究了添加TPU和MMT后复合材料的微观结构,探究TPU和MMT的用量变化对复合材料力学性能的影响及原因。结果表明:TPU和MMT对苄基化棉秆皮纤维型复合材料具有良好的增韧增强效果;当TPU用量在20%以上时,增韧效果较好,但不能同时增强和增韧;而MMT用量在4%时,可以同时获得较好的增韧和增强效果。
Benzyl cotton stalk bark fibers due to hot melt viscosity is too high, can not effectively infiltrate fibers, so the mechanical properties of self-reinforced composites are affected. The composites were prepared by mixing polyurethane (TPU) and montmorillonite (MMT) with the benzylated cotton stalk bark fibers respectively to improve the toughness and strength of the composites. SEM and SEM were used to study the effects of TPU and MMT The microstructure and the influence of the dosage of TPU and MMT on the mechanical properties of the composites were investigated. The results showed that TPU and MMT had good toughening and reinforcing effect on the benzylated cotton stalk bark fiber composites. When the amount of TPU was more than 20%, the toughening effect was better, but could not be enhanced and toughened at the same time. The MMT The amount of 4%, you can get better both toughening and enhancing effect.