Article Dans Une Revue Industrial Crops and Products Année : 2024

Mechanochemical cleavage of wheat lignin into a more homogeneous fraction

Résumé

Lignin, the second most abundant biopolymer in earth, represents nature’s largest carbon sources, has high polydispersity and uncertain reactivity, that limit efficient modification/degradation and use of products obtained. In order to decrease by mechanochemical means the average molecular mass and polydispersity of lignin fragments of the CIMV organosolv lignin named Biolignin™, we applied a sodium hydroxide-assisted planetary ball milling process. Experimental conditions were first optimized on purified Biolignin™ then to Biolignin™ without prior purification in 20 mL jars before applying it successfully to a 500 mL planetary ball milling apparatus. Extensive, quantitative HSQC NMR, IR and GPC studies, overtaken supported our three most important findings: reduction of the needed quantity of sodium hydroxide of 75 % compared to the literature, obtention of halve (-51 %) the occurrence of β-O-4’ linkages in lignin fragment, an optimum of 14 wt% of moisture is useful in the degradation process.

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Dates et versions

hal-04693246 , version 1 (11-09-2024)

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Nadja Cachet, Pierre Lavedan, Michel Baltas, Bouchra Benjelloun-Mlayah. Mechanochemical cleavage of wheat lignin into a more homogeneous fraction. Industrial Crops and Products, 2024, 221, pp.119321. ⟨10.1016/j.indcrop.2024.119321⟩. ⟨hal-04693246⟩
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