PLA/PBAT composite modified fiber and preparation method thereof

The invention relates to the technical field of modified fibers, in particular to a PLA/PBAT composite modified fiber and a preparation method thereof. The PLA/PBAT composite modified fiber is prepared from the following components in percentage by mass: 4.65 percent to 46.5 percent of PBAT, 22 percent to 23 percent of PLA-g-GMA, 1 percent to 10 percent of a chain extender, 0.2 percent to 0.5 percent of a catalyst and the balance of PLA (Poly Lactic Acid), and the sum of all the components is 100 percent. The PLA-g-GMA is prepared from 18%-20% of PLA, 3%-5% of a compatibilizer and 0.5%-2% of an initiator through melt blending, strip drawing and pelletizing. The PLA is added in batches to improve the grafting rate, and the toughness structure of the PLA fiber is improved through the synergistic effect of the compatibilizer and the chain extender in melt spinning. 本发明涉及改性纤维技术领域，特别涉及一种PLA/PBAT复合改性纤维及其制备方法。一种PLA/PBAT复合改性纤维，该PLA/PBAT复合改性纤维是由以下质量百分比计的组分制得：PBAT 4.65％～46.5％，PLA-g-GMA22％～23％，扩链剂1％～10％，催化剂0.2％～0.5％，余量为