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Biodegradable Food Packaging Films Using a Combination of Hemicellulose and Cellulose Derivatives
Syed Ammar Hussain1, Madhav P Yadav1, Brajendra K Sharma1
1Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 E. Mermaid Lane, Wyndmoor, PA 19038, USA.
Polymers
|November 27, 2024
Summary
Biodegradable films from hemicellulose B (HB) combined with methylcellulose (MC) or carboxymethyl cellulose (CMC) were enhanced with plasticizers. These sustainable biopolymer films show improved properties for eco-friendly packaging solutions.
Area of Science:
- Materials Science
- Polymer Science
- Sustainable Materials
Background:
- Conventional plastics pose environmental challenges.
- Biodegradable films offer a sustainable alternative for packaging.
- Hemicellulose B (HB) is an underutilized biopolymer from agricultural waste.
Purpose of the Study:
- To develop and characterize biodegradable films using hemicellulose B (HB) blended with methylcellulose (MC) and carboxymethyl cellulose (CMC).
- To investigate the impact of glycerol (GLY) and polyethylene glycol (PEG) plasticizers on the mechanical and physicochemical properties of HB-based films.
- To evaluate the potential of these biopolymer films for sustainable packaging applications.
Main Methods:
- Preparation of biodegradable films by combining HB with MC (90/10 ratio) and CMC (60/40 ratio).
- Incorporation of glycerol (GLY) and polyethylene glycol (PEG) as plasticizers.
- Assessment of film thickness, moisture content, color, physical attributes (peelability, foldability, transparency), mechanical properties (tensile stress, elongation at break, elastic modulus, toughness), and barrier properties (oxygen and water vapor permeability).
Main Results:
- Plasticizer addition (GLY, PEG) increased film thickness and improved physical attributes like foldability and transparency.
- Plasticized films exhibited lower moisture content and enhanced mechanical properties, particularly HB/CMC films.
- HB/MC films with plasticizers showed reduced oxygen and water vapor permeability compared to HB/CMC films.
- Plasticizers induced noticeable changes in film color, increasing lightness and yellowness.
Conclusions:
- Biodegradable films based on hemicellulose B, methylcellulose, and carboxymethyl cellulose can be effectively plasticized to enhance their properties.
- The choice of cellulose derivative (MC or CMC) and plasticizer influences the final film characteristics, especially barrier properties.
- These findings support the development of sustainable packaging materials from agricultural waste, reducing reliance on conventional plastics.
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