Binderless films from lignin-rich residues of enzymatic saccharification

Han, Yang‐Su; Liew, Feng Jin; Kaffenberger, Justin T.; Seaton, Nicholas C.A.; Kwon, Oh-Jin; Schilling, Jonathan S.; Tze, William Tai Yin

doi:10.1016/j.biombioe.2021.106214

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Thermal Curing1

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Cited by 2 publications

(1 citation statement)

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“…Yang et al further investigated the ability of lignin to form covalent bonds during a thermal reaction. 104 They treated poplar chips with an alkali and then used enzymatic hydrolysis to produce glucose. Next, they collected the sugar-producing residue for further processing.…”

Section: Thermal Curingmentioning

confidence: 99%

Lignin-enhanced wet strength of cellulose-based materials: a sustainable approach

Huang

Zhu

et al. 2023

Green Chem.

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Section: Thermal Curingmentioning

confidence: 99%

Lignin-enhanced wet strength of cellulose-based materials: a sustainable approach

Huang

Zhu

et al. 2023

Green Chem.

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Fully Biobased Thermosetting Adhesive from Enzymatic Saccharification Residue

Hafez,

Yang,

Liew

et al. 2024

ACS Sustainable Chem. Eng.

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This study was aimed at using the solid residue of enzyme-based cellulosic sugar production (saccharification) to formulate a fully biobased heat-curable wood adhesive. The novelty of such utilization lies in three implemented strategies: (1) valorizing lignin in the hardwood saccharification residue without chemical prerefining, (2) increasing reactive surfaces by wet-grinding the lignin-rich residue, and (3) blending citric acid (biobased cross-linker) as an adhesive component to enhance bond performance of the residue. Single-lap shear specimens were prepared and tested. Results showed that saccharification improved the wood bonding ability of the resulting residue. Grinding the residue into smaller particles also led to stronger bonding. Without citric acid (only saccharification residue), the lap shear strength value attained 80% (or 6.25 MPa) of that of a commercial phenol-formaldehyde (PF) wood adhesive. With 33.3% w/w citric acid (66.7% w/w saccharification residue), the dry and wet bonding properties achieved values comparable to those of PF. Ester cross-linking was verified to account for such enhanced bonding. This formaldehyde-free, competitive adhesive product signifies waste valorization realized via an organic solvent-free process. Upon optimizing the grinding step, this adhesive could contribute to the viability of the cellulosic sugar-based biorefinery system, as a collateral benefit and a win–win strategy for utilizing plant biomass.

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Binderless films from lignin-rich residues of enzymatic saccharification

Cited by 2 publications

References 31 publications

Lignin-enhanced wet strength of cellulose-based materials: a sustainable approach

Lignin-enhanced wet strength of cellulose-based materials: a sustainable approach

Fully Biobased Thermosetting Adhesive from Enzymatic Saccharification Residue

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