Lignin nanoparticles have attracted wide attention due to their huge application potential.The preparation methods for lignin functionalized nanoparticles,such as self-assembly method,interface polymerization/crosslinking method,mechanical method and enzymatic hydrolysis method,are introduced in detail.The research progress on the application of composite films made from lignin and starch,chitosan,pectin polylactic acid and other polymer materials in food packaging is emphatically expounded.The application prospect of lignin nanocomposite film is also prospected.
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