Natural and Biopolymer Composites for Packaging

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Biomacromolecules, Biobased and Biodegradable Polymers".

Deadline for manuscript submissions: closed (31 May 2023) | Viewed by 3697

Special Issue Editor


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Guest Editor
School of Chemical, Materials and Biomedical Engineering, University of Georgia, Athens, GA 30602, USA
Interests: natural and biopolymers and their composites for coating, packaging, and structural applications; economic and environmental impacts of natural and biopolymers and their derivatives; development of circular and sustainable materials for food packaging applications

Special Issue Information

Dear Colleagues,

Natural polymers such as chitosan, cellulose, starch, and protein and their composites can be highly biodegradable, biocompatible, and abundantly available for developing packaging materials. They possess excellent mechanical and barrier properties for coating and composite manufacturing applications. They can also be co-blended with other biopolymers such as PLA and PHB to produce flexible packaging materials. This Special Issue aims to attract but is not limited to technical advances in extraction and isolation, surface modifications, crosslinking studies, structural and mechanical properties of natural polymers and their composites, optimization and scale-up of composites for large-scale production, current challenges and technological advances in developing natural polymer composites, technoeconomic assessment, life cycle environmental and ecological impact assessments, home and industrial compostability, and circularity of natural and biopolymers and their composites for packaging applications. 

Prof. Dr. Sudhagar Mani
Guest Editor

Manuscript Submission Information

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Keywords

  • surface modifications
  • composite properties
  • scale-up
  • optimization
  • cost estimation
  • environmental impacts
  • biodegradability study

Published Papers (1 paper)

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Review

22 pages, 3740 KiB  
Review
Material and Environmental Properties of Natural Polymers and Their Composites for Packaging Applications—A Review
by Prabaharan Graceraj Ponnusamy and Sudhagar Mani
Polymers 2022, 14(19), 4033; https://doi.org/10.3390/polym14194033 - 26 Sep 2022
Cited by 15 | Viewed by 3414
Abstract
The current trend of using plastic material in the manufacturing of packaging products raises serious environmental concerns due to waste disposal on land and in oceans and other environmental pollution. Natural polymers such as cellulose, starch, chitosan, and protein extracted from renewable resources [...] Read more.
The current trend of using plastic material in the manufacturing of packaging products raises serious environmental concerns due to waste disposal on land and in oceans and other environmental pollution. Natural polymers such as cellulose, starch, chitosan, and protein extracted from renewable resources are extensively explored as alternatives to plastics due to their biodegradability, biocompatibility, nontoxic properties, and abundant availability. The tensile and water vapor barrier properties and the environmental impacts of natural polymers played key roles in determining the eligibility of these materials for packaging applications. The brittle behavior and hydrophilic nature of natural polymers reduced the tensile and water vapor barrier properties. However, the addition of plasticizer, crosslinker, and reinforcement agents substantially improved the mechanical and water vapor resistance properties. The dispersion abilities and strong interfacial adhesion of nanocellulose with natural polymers improved the tensile strength and water vapor barrier properties of natural polymer-based packaging films. The maximum tensile stress of these composite films was about 38 to 200% more than that of films without reinforcement. The water vapor barrier properties of composite films also reduced up to 60% with nanocellulose reinforcement. The strong hydrogen bonding between natural polymer and nanocellulose reduced the polymer chain movement and decreased the percent elongation at break up to 100%. This review aims to present an overview of the mechanical and water vapor barrier properties of natural polymers and their composites along with the life cycle environmental impacts to elucidate their potential for packaging applications. Full article
(This article belongs to the Special Issue Natural and Biopolymer Composites for Packaging)
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