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Lignin-Based Composite Film and Its Application for Agricultural Mulching
Summary
This review examines lignin-based composite films as biodegradable alternatives to conventional polyethylene agricultural mulch, summarizing recent advances in lignin types, film preparation methods, and field applications, with the conclusion that lignin-based mulches offer a promising green solution to agricultural plastic pollution.
Agricultural mulching is an important input for modern agricultural production and plays an important role in guaranteeing food security worldwide. At present, polyethylene (PE) mulching is still commonly used in agricultural production in most countries around the world, which is non-biodegradable, and years of mulching have caused serious agricultural white pollution. Lignin is one of the three major components of plant cell walls, and it is also the main renewable natural aromatic compounds in nature. Lignin-based composite film materials are green, biodegradable, and show good prospects for development in the field of agricultural mulch. This paper introduces the types, structure, and application status of lignin, summarizes the preparation of lignin-based composite film materials and its latest research progress, focuses on the types, preparation methods, and application examples of lignin-based agricultural mulching, and looks forward to the future development prospects of lignin-based agricultural mulching.