Lignin-gelatin film

100% UV shielding

Nano-lignin imparts complete UV shielding and flame retardancy to otherwise brittle and flammable pure gelatin films, while addition of ammonium polyphosphate transforms the film into an ultra-flexible material.

Wang, Shan · Wang, Youmei · Lu, Lin · Xiang, Lu · Qi, Jinqiu · Li, Wang · Chen, Liqing · Xie, Jiulong

Industrial Crops and Products 2025

Specifications

UV blocking

{'zh': '100', 'en': '100'} %

Limiting oxygen index

{'zh': '31.45', 'en': '31.45'} %

Limiting oxygen index

{'zh': '52.9', 'en': '52.9'} %

Elongation at break improvement

{'zh': '3', 'en': '3'}

Advantages

100% UV blocking

With nano-lignin, the film blocks all ultraviolet light, protecting contents from UV degradation.

Turns flame-retardant

Nano-lignin raises the limiting oxygen index to 31.45%, making the film flame-retardant, and APP further increases it.

Flexibility triples

With 20% APP, elongation at break exceeds three times that of pure gelatin and lignin-only films, making the film ultra-flexible.

Applications

• Biodegradable packaging：Replaces conventional plastics in food or pharmaceutical packaging, offering UV shielding and flame retardancy while remaining biodegradable.
• Flexible electronics：Serves as a substrate or encapsulation for flexible electronics, providing UV protection and flame retardancy while maintaining high flexibility.
• Flame-retardant materials：Used in applications requiring flame retardancy, such as building materials or vehicle interiors, replacing halogenated flame retardants.