Toward well-defined colloidal particles: Efficient fractionation of lignin by a multi-solvent strategy

Toward well-defined colloidal particles : Efficient fractionation of lignin by a multi-solvent strategy

Colloidal lignin particles (CLPs) have sparked various intriguing insights toward bio-polymeric materials and triggered many lignin-featured innovative applications. Here, we report a multi-solvent sequential fractionation methodology integrating green solvents of acetone, 1-butanol, and ethanol to fractionate industrial lignin for CLPs fabrication. Through a rationally designed fractionation strategy, multigrade lignin fractions with variable hydroxyl group contents, molecular weights, and high purity were obtained without altering their original chemical structures. CLPs with well-defined morphology, narrow size distribution, excellent thermal stability, and long-term colloidal stability can be obtained by rational selection of lignin fractions. We further elucidated that trace elements (S, N) were reorganized onto the near-surface area of CLPs from lignin fractions during the formation process in the form of -SO42− and -NH2. This work provides a sustainable and efficient strategy for refining industrial lignin into high-quality fractions and an in-depth insight into the CLPs formation process, holding great promise for enriching the existing libraries of colloidal materials.

Pang, Bo,1990-Stockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)bopa6207 (författare)
Li, Gaiyun (författare)
Han, Yanming (författare)
Chu, Fuxiang (författare)
Stockholms universitetInstitutionen för material- och miljökemi (MMK) (creator_code:org_t)

Ingår i:International Journal of Biological Macromolecules254:30141-81301879-0003

Av författaren/redakt...: Jiang, Pan; Pang, Bo, 1990-; Li, Gaiyun; Han, Yanming; Chu, Fuxiang

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