Preparation method of tough polylactic acid composite fiber

Abstract

The invention relates to a preparation method of a tough polylactic acid composite fiber. Hydroxylated multiwalled carbon nanotubes are added in polylactic acid fibers and are subjected to surface modification, polymerization grafting, masterbatch preparation and melt spinning, so as to prepare the tough polylactic acid composite fiber for solving the problems of low intensity and poor toughness of the polylactic acid fiber. The preparation method has advanced technology, the data is accurate and detailed, the prepared tough polylactic acid composite fiber can reach 4.98cN / dtex in breaking strength, is 37.3% in elongation at break and has breaking strength improved by 32% and elongation at break improved by 22%, the application range of the polylactic acid composite fiber is expanded, and the method is ideal for preparing the tough polylactic acid composite fiber.

Description

technical field [0001] The invention relates to a preparation method of a tough polylactic acid composite fiber, which belongs to the technical field of chemical fiber preparation and application. Background technique [0002] Polylactic acid fiber, referred to as PLA fiber, is a degradable chemical fiber material made of renewable corn and other grains. It overcomes the shortcomings of polymer materials relying on petrochemical resources and can be completely degraded in water or soil. , will not pollute the environment; PLA fibers have excellent biocompatibility, biodegradability, and bioabsorbability, and are widely used in medical biomaterials; PLA fibers are soft, light, sweat-absorbing, quick-drying, and antibacterial. It can be applied to clothing fabrics, daily necessities, interior decorations, bedding, etc., and has been widely used in medical and daily necessities. [0003] However, PLA fiber has the disadvantages of high brittleness, poor toughness, poor impact ...

AI Technical Summary

Problems solved by technology

[0003] However, PLA fiber has the disadvantages of high brittleness, poor toughness, poor impact resistance, poor processing thermal stability, and slow crystallization, especially the shortcomings of high brittleness, poor toughness, and poor impact resistance severely limit its application as a fiber material, such as PLA The fibers cannot meet the high requirements for knotting strength and flexibility of medical surgical sutures. Therefore, the strength and toughness of PLA fibers must be improved, and the PLA fibers must be strengthened and toughened to meet the needs of high-tech fields.

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