On Laccase-Catalyzed Polymerization of Biorefinery Lignin Fractions and Alignment of Lignin Nanoparticles on the Nanocellulose Surface via One-Pot Water-Phase Synthesis

Luyao Wang, Liping Tan, Liqiu Hu, Xiaoju Wang*, Rajesh Koppolu, Teija Tirri, Bas van Bochove, Petri Ihalainen, Liji Sobhana Seleenmary Sobhanadhas, Jukka V. Seppälä, Stefan Willför, Martti Toivakka, Chunlin Xu*

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

6 Sitaatiot (Scopus)
41 Lataukset (Pure)

Abstrakti

Two series of well-defined lignin fractions derived from birch and spruce alkaline lignin (AL) by sequential solvent fractionation (i-PrOH-EtOH-MeOH) were engaged in a structure–property-application relationship study. The bacterial-derived alkaliphilic laccase (MetZyme) extensively catalyzed the oxidation and polymerization of AL fractions in an aqueous alkaline solution (pH 10). Lignin fractions with low molar mass reached a higher polymerization degree due to more phenolic-OH groups serving as reactive sites of oxidation and better lignin-laccase accessibility arose from a lower lignin condensation degree than the high molar mass ones. In comparison, AL fractions from spruce were found to be less reactive toward the laccase-catalyzed polymerization than those from birch, which was attributed to the much pronounced aryl-vinyl moieties’ oxidation. Furthermore, in situ polymerization of birch AL fractions using microfibrillated cellulose as a structural template was conducted in an aqueous medium and a dispersion of nanocellulose with its fiber network evenly coated by aligned lignin nanoparticles was obtained. The present study not only provides fundamental insights on the laccase-assisted oxidation and polymerization of lignin but also presents a new perspective for valorizing lignin in biobased fiber products through green processing of solvent fractionation and enzymatic treatment.
AlkuperäiskieliEnglanti
Sivut8770-8782
Sivumäärä13
JulkaisuACS Sustainable Chemistry and Engineering
Vuosikerta9
Numero26
Varhainen verkossa julkaisun päivämäärä21 kesäk. 2021
DOI - pysyväislinkit
TilaJulkaistu - 5 heinäk. 2021
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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