Preparation and Characterization of Polylactic Acid/Bamboo Fiber Composites

Area of Science:

• Materials Science
• Polymer Science
• Sustainable Materials

Background:

• Growing demand for eco-friendly packaging alternatives to petrochemical-based materials.
• Existing biocomposites often lack sufficient water resistance and barrier properties.
• Need for improved performance in polylactic acid (PLA) based composites.

Purpose of the Study:

• To develop a novel biocomposite film with enhanced mechanical, thermal, and barrier properties.
• To investigate the effects of modified polylactic acid (MPLA) and a bamboo fiber powder (BFP) silica aerogel mixture (TBFP) on composite performance.
• To evaluate the cytocompatibility and biodegradability of the developed composites for packaging applications.

Main Methods:

• Melt-mixing of MPLA with TBFP (BFP and silica aerogel powder).
• Characterization of structural, morphological, mechanical, thermal, water absorption, and barrier properties.
• Assessment of cytocompatibility and biodegradability.

Main Results:

• MPLA/TBFP composites exhibited superior tensile strength, elongation at failure, and Young's modulus compared to PLA and PLA/BFP.
• Improved water resistance, lower water vapor transmission rate, and reduced oxygen transmission rate were observed.
• Enhanced thermal stability and interfacial adhesion between MPLA and TBFP were confirmed.
• Good cytocompatibility and increased biodegradability with filler concentration were demonstrated.

Conclusions:

• The developed MPLA/TBFP composites offer significant improvements in mechanical strength, water resistance, and barrier properties.
• These biocomposites present a promising sustainable alternative for food and electronics packaging.
• The enhanced properties and biodegradability support their viability as green packaging materials.