Research on Degradable Polylactic Acid Materials

Polylactic acid (PLA) has the characteristics of being completely biodegradable, processable, renewable, and excellent in mechanical properties. PLA's shortcomings such as high hydrophobicity, brittleness, and high price limit its application and development. In recent years, the research progress of polylactic acid and natural polymer blending and synthetic polymer blending modification at home and abroad, based on the existing research results, can be improved by adding flexible polymers, surfactants, fibers, etc. Brittleness, compatibility and strength of materials.

In the face of the shortage of petroleum resources and the pressure brought by environmental pollution, biodegradable materials that can replace traditional petroleum-based composite materials have become a hot spot in the world's research. The green and environmentally friendly polylactic acid-based composite materials are in this era. Came into being. Polylactic acid-based plastics get rid of the dependence on petroleum resources, and are widely used in tissue engineering, medical equipment, packaging materials, etc. with their good mechanical properties, biodegradability, and biocompatibility. Study on modification of PLA: PLA/starch, using starch as the filling material of PLA not only improves the hydrophobicity of PLA, but also reduces the cost of the material; PLA/wood flour, adding coupling agent to the PLA/wood flour blend system Improve the compatibility of materials; use natural fiber as a reinforcing material to blend and compound with PLA to improve the mechanical properties of the material; use more flexible PCL to blend with PLA can improve the brittleness of PLA; blend PLA with PPC to improve The mechanical properties and thermal stability of composite materials. These blending and modification methods provide the possibility to reduce production costs and improve performance, and promote the application of polylactic acid composites. In the future development of PLA, flexible polymers, surfactants, coupling agents, various fibers, etc. can be added to improve the brittleness, compatibility and strength of composite materials, and PLA can be improved by combining physical and chemical methods. The performance of base composite materials to promote the extensive development of polylactic acid-based composite materials. With the development of science and technology, and people's in-depth research on degradable materials, polylactic acid composite materials will inevitably become the main force in the development of the plastics industry in the future.