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Plant-Origin Stabilizer as an Alternative of Natural Additive to Polymers Used in Packaging Materials
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This study tested cannabidiol (CBD) extract from cannabis plants as a natural stabilizer in biodegradable plastics (PLA and a bio-copolymer), finding it has antioxidant properties that could extend polymer lifespan. Using plant-based stabilizers could reduce the need for synthetic chemical additives in plastic packaging.
Over the past 25 years, cannabis plants have gained major popularity in the research community. This study aimed to evaluate the antioxidant capacity and stabilization efficiency of cannabidiol (CBD) extract in two different polymers: polylactide (PLA) and ethylene-norbornene copolymer (Topas) that are used in packaging materials more often. The research technology included weathering in a special chamber, surface free energy and color change measurements, surface morphology and Fourier-transform infrared spectroscopy (FTIR) analysis, thermogravimetry, and determination of the oxidation induction time or temperature (OIT) values, based on which the effectiveness of the cannabidiol extract could be estimated. Obtained results showed that the addition of CBD to polymer mixtures significantly increased their resistance to oxidation, and it can be used as a natural stabilizer for polymeric products. Moreover, samples with cannabidiol changed their coloration as a result of weathering. Therefore, this natural additive can also be considered as a colorimetric indicator of aging that informs about the changes in polymeric materials during their lifetime. On the other hand, surface properties of samples with cannabidiol content did not alter much compared to pure Topas and PLA.
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This review examines how natural antioxidants such as tocopherols, flavonoids, and tannins can stabilize bio-based and biodegradable plastics against oxidative degradation, improving the durability and performance of materials like PLA, PHA, and starch-based polymers for packaging and other applications.
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Researchers developed a biodegradable plastic using hemp (Cannabis sativa) fiber in conjunction with microbial stimulation, exploiting the structural properties of the hemp stalk fiber as a biopolymer matrix. The study demonstrated the technical feasibility of producing plant-derived bioplastics as an alternative to petroleum-based polymers contributing to microplastic pollution.
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Scientists are developing food packaging made from plant-based, biodegradable materials mixed with natural ingredients (like antioxidants and antimicrobial compounds) that can keep food fresher longer while breaking down instead of piling up as plastic waste. This review paper summarizes existing research, showing these "smart" packages can even include sensors that tell you if your food is spoiling, a promising step toward cutting both food waste and plastic pollution, which matters since traditional plastic packaging is linked to microplastic contamination in our food and bodies.
Bio-Based Materials for Packaging
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This review evaluates bio-based materials as sustainable alternatives for plastic packaging, examining the environmental performance, mechanical properties, and commercial viability of biopolymers in addressing the global plastic pollution crisis.
Polylactic Acid: A Bio-Based Polymer as an Emerging Substitute for Plastics
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This review covers polylactic acid (PLA), a biodegradable plant-based polymer being developed as a more sustainable alternative to conventional plastics. PLA can be used for packaging and other applications, but improving its performance and reducing production costs remain challenges for wider adoption.
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