Enhancing Paper’s Mechanical Strength and Antibacterial Properties through a Biopolymer-Based Coating
Neha Sawant, Sara T. Caceres, Carin L. Garcia, Mario O. C. Lizardo, Carol Beaver, Santiago Aparicio, Mert Atilhan
TL;DR
This paper shows how a biopolymer coating made from soybean flour and cellulose can strengthen paper and reduce bacteria, making it useful for packaging.
Contribution
A new biopolymer coating using citric acid-modified soybean flour and CMC is developed to enhance paper's mechanical and antibacterial properties.
Findings
The coating improved paper's tensile strength by 61.8%.
It reduced bacterial colonies by 84–89% against Escherichia coli.
The optimal coating formulation was a 50:50 blend of SBFC and CMC.
Abstract
This study presents a sustainable approach to improving the antibacterial and mechanical properties of paper through the application of a biopolymer-based coating derived from citric acid-modified soybean flour (SBFC) and carboxymethyl cellulose (CMC). The SBFC was synthesized via thermal cross-linking between citric acid and defatted soybean flour under optimized conditions (140 °C for 2 h, with Na2HPO4 as a catalyst), facilitating ester and amide bond formation that was confirmed via FTIR spectroscopy. Aqueous solutions of SBFC were subsequently blended with CMC at varying ratios, and a 50:50 formulation was optimized for the best performance of dispersion stability and coating performance. The final SBFC/CMC coating exhibited a 61.8% improvement in tensile strength compared to uncoated paper. Antibacterial activity was evaluated using Escherichia coli ATCC 25922 as a model…
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Taxonomy
TopicsNanocomposite Films for Food Packaging · Advanced Cellulose Research Studies · biodegradable polymer synthesis and properties