Journal
MATERIALS TECHNOLOGY
Volume 36, Issue 10, Pages 585-593Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10667857.2020.1782060
Keywords
Lignin; poly lactic acid (PLA); biodegradability; antimicrobial activity
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Funding
- Chhattisgarh Council of Science and Technology (CCOST), Raipur, India [2142/MRP/2015]
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The study successfully synthesized lignin-polylactic acid (PLA) blended film with excellent antimicrobial activity and biodegradability. The properties of the film were studied using SEM, XRD, DSC, and TGA, showing thermal stability and amorphous nature of the film.
The present work describes the synthesis, characterisation and antimicrobial activity of lignin-polylactic acid (PLA) blended film. Film was prepared using co-polymerisation reaction of lignin and lactic acid in the presence of stannous chloride as a catalyst and poly(vinyl alcohol) to get the uniform film. The properties of the film was studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC) and thermo-gravimetric analysis (TGA), respectively. The lignin-PLA film demonstrated a significant decrease in swelling ratio and tensile strength in contrast to PLA film. SEM analysis revealed proper blending of lignin into PLA matrix with slightly rough surface. Film was thermostable and amorphous in nature as confirmed from the thermal study and XRD analysis, respectively. Further, significant improvement was observed in antimicrobial activity and biodegradability of PLA film after addition of lignin, which suggest the putative application of lignin-PLA film as the food packaging and mulch film materials.
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