摘要
以亚麻落麻纤维、聚乳酸纤维为原料,采用非织造加工方法制作预成型件后,采用模压工艺将预成型件制成亚麻落麻纤维/聚乳酸基完全可降解复合材料。分别研究了预成型件制作工艺中梳理次数、增强纤维体积分数及模压成型工艺中模压温度对复合材料拉伸性能的影响,并采用扫描电镜(SEM)研究了复合材料的拉伸断裂形貌和界面结合状况。结果表明:纤维体积分数为39.6%、模压温度为190℃时材料具有最好的拉伸性能;随着梳理次数的增多,其拉伸强度先升高后下降,梳理2次时其力学性能最优。材料的拉伸断口形貌表明,聚乳酸基材料为脆性断裂,增强纤维与树脂基体之间的界面结合有待进一步改善。
Flax noil fibers reinforced polylactide composites were prepared by means of flax noil fibers and polylactide fibers, non-woven method and moulding pressing technology. The effects of carding times, volume fraction of flax fibers and moulding temperature on tensile strength of the composites were discussed respectively, and the tensile fracture surfaces and the adhesion were examined by scanning electron microscopy. The results reveal that the tensile strength reaches a peak at 190 ℃ and volume fraction of 39.6 %. The strength increases first with the carding times and then decreases, which reaches the highest point after two carding times. The fracture surface reveals that the breakage property of the composite is brittle, and the adhesion between flax fibers and the matrix needs to be improved.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2008年第2期63-67,共5页
Acta Materiae Compositae Sinica
基金
教育部高等学校博士学科点专向科研基金项目(20050058002)
关键词
亚麻落麻纤维
聚乳酸
成型工艺
梳理次数
模压温度
flax noil fibers
polylactide
forming technology
carding times
moulding temperature
