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本文着重研究了亚麻籽麻纤维强度及其复合材料纵向拉伸和弯曲性能,旨在探求亚麻籽麻纤维在绿色复合材料领域的应用潜能。分别采用10 g/l NaOH和20 g/l NaOH对亚麻籽麻纤维进行脱胶处理。脱胶后纤维表面SEM照片显示,经20 g/l NaOH处理可脱除纤维表面大部分胶质,脱胶较为彻底和均匀。热处理对纤维的力学性能有较大影响,经150℃热处理后纤维强度下降了36.2%。选择低熔点PBS(聚丁二酸丁二醇酯)树脂与麻纤维采用热压成型制备了纤维体积分数为36%的复合材料。测试了复合材料的纵向拉伸和弯曲性能,并对破坏模式进行分析。结果显示:碱处理后,复合材料拉伸性能有所降低,弯曲强度分别提高了19.3%(10 g/l NaOH)和59.9%(20g/l NaOH),20 g/l NaOH处理后复合材料的纵向弯曲强度为42.69 MPa。研究表明,亚麻籽麻纤维可用于制备热塑性复合材料,并具有较好的力学性能和应用前景。
This paper focuses on the strength of flaxseed hemp fiber and the longitudinal tensile and flexural properties of flaxseed hemp fiber, in order to explore the potential of flaxseed hemp fiber in the field of greencomposites. Flaxseed hemp fibers were degummed with 10 g / l NaOH and 20 g / l NaOH, respectively. SEM pictures of the fiber surface after degumming showed that most of the gums on the fiber surface can be removed by 20 g / l NaOH treatment, and degumming is more thorough and uniform. The heat treatment has a great influence on the mechanical properties of the fibers. After heat treatment at 150 ℃, the fiber strength decreased by 36.2%. Select the low melting point PBS (polybutylene succinate) resin and hemp fiber using hot-pressing molding fiber volume fraction of 36% of the composite material. The longitudinal tensile and flexural properties of the composites were tested and the failure modes were analyzed. The results showed that the tensile properties of the composites decreased after the alkali treatment, the flexural strength increased by 19.3% (10 g / l NaOH) and 59.9% (20 g / l NaOH), respectively. Longitudinal bending strength is 42.69 MPa. Studies have shown that flax seed hemp fiber can be used to prepare thermoplastic composites, and has good mechanical properties and application prospects.