Pickering multiphase materials using plant-based colloidal lignin nanoparticles

Abstract

A Pickering emulsion, stabilized by amphiphilic solid particles, is a highly functional and stable system that has attracted significant research interest. Lignin, an amphiphilic biomacromolecule found widely in nature, can be transformed into nanoparticles using modern nanotechnology with great potential for use in Pickering emulsions. Despite numerous studies exploring the function of colloidal lignin particles (CLPs) in producing Pickering emulsions, there are few systematic reviews on the state-of-the-art works related to CLP-stabilized Pickering emulsions. In this review, we summarize recent advances in synthesis processes, formation mechanisms, structural characteristics and surface properties of CLPs on the stability and functionality of Pickering emulsion systems. We also highlight advanced applications of CLP-stabilized Pickering emulsions at present and propose future development directions for improving their synthesis technology using lignin as a stabilizer to enhance their properties. Our hope is that this review will serve as a roadmap for scientists engaged in research on CLP-Pickering emulsions across different scientific fields to achieve optimal material performance goals.