D-lactic acid in the polylactic acid biodegradable material application

Lactic acid is polylactic acid bioplastics (polylactide, PLA) materials. Calcium lactate (lactic acid) depends on the physical properties of D, L two isomers composition and content. The racemic D,potassium lactate synthesized racemic D, L-polylactic acid (PDLLA) is amorphous structure, poor mechanical properties, degradation time is shorter, and the contraction occurs in the body, the contraction rate of 50 % or more, the application has been limited. L-polylactic acid (PLLA) and D-polylactic acid (PDLA) regular arrangement of the segment, crystallinity, mechanical strength and melting point so far over PDLLA.