Biorefinery of Lignocellulosic and Marine Resources for Obtaining Active PVA/Chitosan/Phenol Films for Application in Intelligent Food Packaging

Ricardo Gómez

Introduction

The growing concern over environmental pollution caused by plastic packaging has led to an increasing interest in developing sustainable alternatives. One promising approach is the use of biopolymers derived from renewable resources for the production of biodegradable films. Lignocellulosic biomass, such as agricultural residues and wood, along with marine resources like seaweed, are abundant and sustainable feedstocks for producing biopolymers. These materials are rich in cellulose, hemicellulose, and phenolic compounds, which can be processed into films that offer both biodegradability and functional properties. The combination of Polyvinyl Alcohol (PVA), chitosan, and phenolic compounds from lignocellulosic and marine resources has emerged as a potential solution for creating active films that can be used in intelligent food packaging. These films not only provide mechanical strength and biodegradability but also exhibit bioactive properties, such as antimicrobial and antioxidant activity, which are essential for preserving food quality and safety [1].

The concept of intelligent food packaging involves incorporating active components into packaging materials to monitor and extend the shelf life of food products. Additionally, the use of natural biopolymers ensures that the films are biodegradable, addressing the environmental issues associated with conventional plastic packaging. This innovative biorefinery approach holds great potential for developing sustainable and active food packaging materials that contribute to both food safety and waste reduction [2].

Description

The process of producing active PVA/chitosan/phenol films begins with the extraction of cellulose and phenolic compounds from lignocellulosic and marine biomass. Lignocellulosic biomass is typically treated with alkaline or acidic solutions to break down lignin and hemicellulose, isolating the cellulose, which can then be used as a film-forming material. Similarly, marine resources, such as seaweed, are rich in phenolic compounds and polysaccharides, which can be extracted and incorporated into the film matrix. The combination of PVA, chitosan, and phenols results in a composite film that combines the advantages of both synthetic and natural biopolymers. PVA provides film-forming capability and flexibility, while chitosan contributes to antimicrobial properties due to its natural antimicrobial activity, which is effective against a broad range of bacteria and fungi. The incorporation of phenolic compounds, which are abundant in plant-based and marine biomass, further enhances the antioxidant and antimicrobial functions of the film, making it suitable for intelligent food packaging applications [3].

The resulting films exhibit improved mechanical properties, such as tensile strength and flexibility, which are important for handling and processing. Additionally, the films can be designed with specific barrier properties, including water vapor and oxygen permeability, to control moisture and gas exchange, which is critical for preserving the quality and shelf life of food products. For instance, reducing oxygen permeability helps prevent the oxidation of fats and oils, while controlling moisture helps maintain the texture and freshness of food. Furthermore, the active films can respond to external stimuli, such as changes in pH or temperature, by releasing bioactive agents, such as antimicrobial compounds, to prevent microbial growth and spoilage. This responsiveness is an essential feature of intelligent packaging, as it allows the packaging to actively monitor and respond to the condition of the food inside, providing real-time protection and preservation. The integration of these bioactive properties into the film matrix makes PVA/chitosan/phenol films a promising solution for the development of smart packaging that enhances food safety and extends shelf life without relying on synthetic additives or preservatives [4].

Moreover, the environmental benefits of using biopolymers derived from lignocellulosic and marine resources cannot be overlooked. Both types of biomass are renewable, widely available, and biodegradable, making them ideal alternatives to petroleum-based plastics. The production of PVA/chitosan/phenol films from these resources not only reduces the environmental impact associated with plastic waste but also provides an opportunity for utilizing agricultural and marine waste, thus promoting a circular economy. The biodegradability of the films ensures that they will break down naturally in the environment after use, reducing the accumulation of non-biodegradable plastic waste. Additionally, the use of natural, non-toxic components such as chitosan and phenolic compounds further enhances the sustainability of the films. By relying on renewable biomass and incorporating bioactive agents, these films offer a sustainable, environmentally friendly solution to the growing problem of plastic pollution while also addressing food preservation needs [5].

Conclusion

In conclusion, the biorefinery approach of using lignocellulosic and marine resources to produce active PVA/chitosan/phenol films for intelligent food packaging represents a significant advancement in sustainable packaging technology. By harnessing the renewable and biodegradable potential of these natural materials, the films offer a viable alternative to conventional plastic packaging, which is a major contributor to global plastic pollution. The incorporation of bioactive components such as chitosan and phenolic compounds not only enhances the mechanical properties of the films but also provides essential functions for food preservation, including antimicrobial and antioxidant properties. These films can play a key role in extending the shelf life of food products while reducing the need for synthetic preservatives and additives. Furthermore, the use of marine and lignocellulosic biomass in film production aligns with the principles of a circular economy, where waste from agriculture and the marine industry is converted into valuable products. While challenges remain in optimizing production methods, scalability, and cost-effectiveness, the potential of these active films in intelligent food packaging holds promise for improving food safety and sustainability. Continued research and development are essential to refine these materials, making them more commercially viable and widely adopted in the food packaging industry.

References

1.  Corrêa, Thamy Lívia Ribeiro, Marisa Vieira de Queiroz and Elza Fernandes de Araújo. "Cloning, recombinant expression and characterization of a new phytase from Penicillium chrysogenum." Microbiol Res 170 (2015): 205-212.

Google Scholar, Crossref, Indexed at

2.  Yu, Wanqing, Jing Zhang, Lijuan Liu, Yan Li and Xiaoyu Li. "A source-sink landscape approach to mitigation of agricultural non-point source pollution: Validation and application." Environ Pollut 314 (2022): 120287.

Google Scholar, Crossref, Indexed at