A new and efficient lactic acid polymerization by multimetallic cerium complexes: a poly(lactic acid) suitable for...

Area of Science:

• Polymer Chemistry
• Materials Science
• Green Chemistry

Background:

• Poly(lactic acid) (PLA), particularly poly(l-lactic acid) (PLLA), is a versatile biopolymer with applications in biomedical fields, packaging, and electronics.
• Traditional metallic implants in orthopedics are non-degradable, highlighting the need for advanced degradable biomaterials.
• The synthesis of PLLA requires efficient and environmentally friendly catalysts.

Purpose of the Study:

• To develop an innovative and eco-sustainable catalyst for poly(l-lactic acid) (PLLA) synthesis.
• To investigate the efficacy of a novel cerium-based catalyst system for polyester synthesis.
• To explore the potential of cerium ions' antibacterial properties in biomaterials.

Main Methods:

• A novel synthesis route for PLLA was developed.
• The combined CeCl3·7H2O-NaI system was employed as a catalyst.
• Different synthetic pathways were tested to optimize PLLA production.

Main Results:

• The CeCl3·7H2O-NaI catalyst system demonstrated high efficiency in PLLA synthesis.
• Achieved high yields up to 95% conversion.
• Produced PLLA with a valuable molecular weight ranging from 9000 to 145,000 g mol⁻¹.

Conclusions:

• The CeCl3·7H2O-NaI system is a valuable, non-toxic catalyst for PLLA synthesis.
• This catalyst offers a sustainable approach to producing PLLA for various applications.
• The study showcases the utility of cerium ions in biomaterials engineering, leveraging their antibacterial properties.