关键词: 聚乳酸, 香蕉纤维, 制备, 复合材料, 表面

Abstract: Banana fiber reinforced polylactic acid (PLA) composite was prepared with ATBC as plasticizer and by adding modified banana fiber and intumescent flame retardant (IFR) into polylactic acid (PLA). The composite was the best when banana fiber was modified by silane coupling agent,with tensile strength and flexural strength 57.49MPa and 101.80MPa,respectively. The result was consistent with scanning electron microscope (SEM). The comprehensive properties of the composite was the best when intumescent flame retardant content was 5 phr,limited oxygen index reached 32.8%,vertical burning test reached V-0 (UL-94),tensile strength and flexural strength reached 43.97MPa and 87.95 MPa respectively.The result of TG showed than addition of flame retardant banana fiber could obviously increase thermal decomposition temperature and final amount of residual carbon of PLA.

Key words: polylactic acid, banana fiber, preparation, composites, surface