Biopolymers based paper coating with promoted grease resistivity, bio-degradable and mechanical properties

The dominance of plastics in the packaging market is due to their low weight and thickness, which save transportation costs. However, their non-biodegradability poses a significant threat to the environment. Paper, on the other hand, is considered as a safer alternative due to its natural composition and biodegradability. The porous structure of paper limits its application in packaging, and its poor water resistance further restricts its use in humid environments. Therefore, lamination is a method useful tool to improve the barrier properties of paper. Additionally, the researchers are focusing on developing biodegradable and water-based coatings with anti-fat properties as a green alternative to plastic packaging. The impact of a new grease-resistant coating composed of starch, gelatin and sodium alginate on the mechanical properties of paper was investigated through tensile, tearing, and bursting strength tests. The results showed significant improvements in the mechanical properties of the coated paper sheets. Furthermore, the biodegradability test indicated that the paper samples coated with the new composition showed a 50% weight loss after one week of incubation in the soil, and after three weeks, they exhibited 100% weight loss, demonstrating their outstanding biodegradability.

Automated summary

The dominance of plastics in packaging is due to their low weight and thickness, which save transportation costs, but their non-biodegradability poses an environmental threat. Paper is considered a safer alternative due to its natural composition and biodegradability, although its limitations include the porous structure and poor water resistance. To improve the properties of paper, lamination is a useful tool. Researchers focus on developing biodegradable and water-based coatings with anti-fat properties as a green alternative to plastic packaging. A new grease-resistant coating composed of starch, gelatin, and sodium alginate was tested on paper, resulting in significant improvements in mechanical properties and outstanding biodegradability.