what is the Application of polylactic acid?
Polylactic acid has been widely used in biomedical engineering as surgical sutures, bone nails and bone plates. Application of polylactic acid.
The surgical line made of polylactic acid does not need to be disassembled, and can be slowly hydrolyzed to lactic acid and metabolized by the body.
The general degradation time takes six months to two years.
The ideal requirement of a bone plate is that it can be gradually degraded, so that the bone can withstand increasing stress step by step.
The disadvantage is that the mechanical strength properties of pure lactic acid decrease too quickly, so it is generally necessary to add fibers to form a composite material with higher strength.
The application of polylactic acid is now beyond the scope of medicine, and is widely used in some common items.
such as: packaging bags, crop films, textile fibers and cups. Polylactic acid packaging materials were initially costly, but now they have become one of the most common packaging materials.
Through processing such as extrusion, injection molding and stretching, polylactic acid can be made into fibers and films. Polylactic acid film has lower water and air permeability than polystyrene film.
Since water and gas molecules diffuse through the amorphous region of the polymer, the water permeability of the polylactic acid film can be adjusted by adjusting the crystallinity of the polylactic acid.
Poly-L-lactic acid has a low glass transition temperature and can be used in the study of shape memory polymers. Its low glass transition temperature is also used as a feedstock for fused deposition forming 3D printers.
It is also a major component of contouring products. The heat-resistant polylactic acid produced after adding D-lactic acid can be used in microwave heating vessels, containers containing hot liquids and even engineering materials.