Bagasse lignin for single-used food packaging applications: UV-barrier, antioxidant, migration and cytotoxicity

Pawarisa WIJARANAKUL; Bongkot HARARAK; Wanwitoo WANMOOLEE; Prapudsorn WANNID; Weerawan LAOSIRIPOJANA

doi:10.55713/jmmm.v35i3.2354

Authors

Pawarisa WIJARANAKUL National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, 114 Thailand Science Park, Khlong Luang, Pathum Thani, 12120, Thailand
Bongkot HARARAK National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, 114 Thailand Science Park, Khlong Luang, Pathum Thani, 12120, Thailand
Wanwitoo WANMOOLEE Department of Chemical Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok (KMUTNB), Bangkok, 10800, Thailand
Prapudsorn WANNID National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, 114 Thailand Science Park, Khlong Luang, Pathum Thani, 12120, Thailand
Weerawan LAOSIRIPOJANA Department of Tool and Materials Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi (KMUTT), Bangkok, 10140, Thailand

DOI:

https://doi.org/10.55713/jmmm.v35i3.2354

Keywords:

PLA bio composites, Sugarcane bagasse lignin, UV shielding

Abstract

This study examined PLA biocomposite films made from organosolv lignin extracted from Thai agro-waste, specifically sugarcane bagasse (BG), to assess their suitability for food packaging, focusing on their physical, thermal, optical, UV-shielding, antioxidant, and migration properties. Extracted BG-lignin exhibited free radical scavenging ability with an EC50 value of 400 µg/ml, reducing DPPH absorbance by 50%. PLA composite films with BG-lignin dosage from 0.1 to 1.0 wt.% were successfully fabricated via conventional blown film extrusion. Addition of BG-lignin at 0.5 wt.% and 1.0 wt.% to PLA films decreased UV transmittance from 90% to 30% and 12%, respectively, without compromising optical clarity. Moreover, DPPH scavenging activity of all composite films with different BG-lignin contents (0.1-1.0 wt.%) reached 50% within 24 h, while overall migration values and cytotoxicity level are below the permissible limit. This study demonstrates the potential application of PLA/BG-lignin composite films for single-used ketchup sachets. These films effectively reduce ketchup color change under UV light exposure.

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