蚕丝织物增强聚乳酸复合材料的制备及其性能研究

以蚕丝织物为增强体,以聚乳酸(PLA)为基体,通过层叠热压制备蚕丝织物增强PLA复合材料,研究了脱胶预处理和热压温度对蚕丝增强PLA复合材料力学性能的影响,并用SEM和TGA进行表征。经过脱胶处理后,蚕丝增强PLA复合材料的力学性能有一定程度的提高,其拉伸强度和冲击强度分别提升了35.78%和33.33%;当热压温度为165℃时,复合材料具有最优的力学性能。SEM结果表明:经过脱胶处理后,复合材料中蚕丝纤维排列比较整齐,基体的连续性较好,纤维与基体之间结合更为紧密。TGA结果表明:经过脱胶处理后,复合材料表现出相对较高的热稳定性。

Study on preparation and properties of PLA composites reinforced by silk fabric

Silk fabrics were used as the reinforcement, and polylactic acid (PLA) was used as the matrix to prepare PLA composites reinforced by silk fabric through hot pressing. The effects of degumming pretreatment and hot-pressing temperature on the mechanical properties of PLA composites reinforced by silk fabric were studied, and the mechanical properties were characterized by SEM and TGA. After degumming treatment, the mechanical properties of PLA composites reinforced by silk fabric were improved to some extent. Tensile strength and impact strength increased by 35.78 % and 33.33 %, respectively. When the hot-pressing temperature was 165 ℃, the composites have the best mechanical properties. The SEM results showed that after degumming treatment, the silk fibers in the composites were arranged neatly;the continuity of the matrix was better, and the fiber and the matrix were more closely bonded. The TGA results showed that after degumming treatment, the composite exhibited relatively high thermal stability.