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A high-efficiency strategy for fruit preservation using green, natural raw materials.
Tong Wang1, Xueling Yu1, Mengyuan Wang1
1College of Chemistry, Chemical Engineering and Resource Utilization, Key Laboratory of Forest Plant Ecology, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China.
International Journal of Biological Macromolecules
|September 23, 2024
Summary
Rice straw lignin was transformed into nanoparticles with potent anti-tyrosinase and antioxidant properties. These lignin nanoparticles, incorporated into composite films, effectively extend fruit shelf life, offering a sustainable solution for food packaging.
Area of Science:
- Biomass valorization
- Materials science
- Food science
Background:
- Straw is an abundant renewable biomass resource.
- Lignin, a natural aromatic compound in straw, presents an opportunity for high-value applications.
- Developing methods for lignin's higher utilization is crucial.
Purpose of the Study:
- To extract alkali lignin from rice straw and prepare lignin nanoparticles (LNPs).
- To evaluate the anti-tyrosinase and antioxidant activities of LNPs.
- To develop and assess composite films using LNPs for fruit preservation.
Main Methods:
- Hydrothermal method in NaOH solution for alkali lignin extraction.
- Green anti-solvent method for LNP preparation.
- Tyrosinase inhibition kinetics analysis.
- Casting method for preparing LNP-chitosan composite films.
Main Results:
- Successfully prepared LNPs from rice straw alkali lignin.
- LNPs exhibited significant anti-tyrosinase activity (IC50 = 0.329 mg mL-1) and antioxidant performance (IC50 = 0.0451 mg mL-1).
- Tyrosinase inhibition by LNPs was determined to be mixed inhibition, with higher affinity to the free enzyme.
- LNP-chitosan composite films effectively extended fruit shelf life.
Conclusions:
- Lignin nanoparticles derived from rice straw possess valuable biological activities.
- These LNPs can be utilized in composite films for effective fruit preservation.
- The study highlights a sustainable approach for valorizing lignin biomass in food packaging applications.
