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Green and Scalable Preparation of Colloidal Suspension of Lignin Nanoparticles and Its Application in Eco-friendly Sunscreen Formulations
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Researchers developed a scalable, solvent-free method to produce lignin nanoparticles and demonstrated their use as a natural UV-absorbing ingredient in eco-friendly sunscreen formulations, offering a biodegradable alternative to synthetic UV filters.
Lignin nanoparticles (LNPs) are applied in several industrial applications. The nanoprecipitation of LNPs is fast and inexpensive but currently still limited to the use of hazardous organic solvents, making it difficult to apply them on a large scale. Here, we report a scalable nanoprecipitation procedure for the preparation of colloidal lignin nanoparticles (cLNPs) by the use of the green solvents dimethylisosorbide and isopropylidene glycerol. Irrespective of the experimental conditions, cLNPs showed higher UV absorbing properties and radical scavenging activity than parent LNPs and raw lignin. cLNPs were successively used in the preparation of eco-friendly sunscreen formulations (SPF 15, 30, and 50+, as evaluated by the COLIPA assay), which showed high UV-shielding activity even in the absence of synthetic boosters (microplastics) and physical filters (TiO2 and ZnO). Biological assays on human HaCaT keratinocytes and human skin equivalents demonstrated the absence of cytotoxicity and genotoxicity, associated with an optimal protection of the skin from UV-A damage.
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Dialysis-induced self-assembly of carboxylated lignin nanoparticles for UV-shielding and cationic pollutant removal
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Researchers synthesized carboxylated lignin nanoparticles via nucleophilic substitution and solvent-exchange dialysis, producing bio-based particles that provided effective UV-A and UV-B shielding when incorporated into cosmetic lotions and exhibited a maximum methylene blue adsorption capacity of 571 mg/g—demonstrating a sustainable, petroleum-free alternative for both UV protection and cationic pollutant removal from water.
Smart nano-biomaterials from lignin for packaging and cosmetics
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Scientists are turning to lignin—a plant material left over from wood and plant processing—as a safer alternative to plastic packaging, which can shed tiny microplastic particles linked to health concerns. This review summarizes research showing lignin's natural antioxidant properties also make it useful in sunscreens and anti-aging skincare products, since it can help protect skin from UV damage and neutralize skin-damaging molecules. While promising, this is an overview of existing studies rather than new experimental proof, so more testing is needed before these lignin-based products become widely available.
Lignin nanoparticles in food packaging: a sustainable approach to material design and performance enhancement
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Researchers reviewed how lignin nanoparticles can enhance biodegradable food packaging polymers like chitosan and starch, finding that lignin's natural antioxidant and antimicrobial properties significantly improve barrier performance and shelf life while reducing reliance on petroleum-based plastics.
Hydrogen-bonded lignin-acrylic copolymer/WPU composites with Integrated UV shielding, antioxidancy and degradability
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Researchers synthesized a lignin-acrylic copolymer from rice straw waste and blended it with waterborne polyurethane to create a composite film with 43% higher tensile strength, near-total UV blocking, and dramatically improved antioxidant capacity, offering a biodegradable, microplastic-reducing alternative to conventional plastic films.
Investigation of the Protective Function of a Lignin Coating of Natural Fiber Geotextiles against Biodegradation
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Researchers investigated whether lignin coatings can protect natural fiber geotextiles from soil degradation and UV-driven breakdown, finding that lignin treatment can extend the functional lifespan of biodegradable geotextiles as a more sustainable alternative to synthetic ones.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.