Deep eutectic solvent pretreatment and subsequent saccharification of corncob

Procentese, Alessandra; Johnson, Erin E.; Orr, Valerie; Campanile, Anna Garruto; Wood, Jeffery A.; Marzocchella, Antonio; Rehmann, Lars

doi:10.1016/j.biortech.2015.05.053

Cited by 308 publications

(158 citation statements)

References 26 publications

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“…DESs are able to dissolve biopolymers like polysaccharides by breaking the supermolecular structure formed by intermolecular hydrogen bonds (Ren et al 2016). For example, ChCl/imidazole can be used to pretreat corncob at a relatively low temperature of 80 °C and the final glucose yield reached 92.3% after the enzymatic hydrolysis (Procentese et al 2015). Due to the diversity of HBDs, researchers have more choice of using different HBDs in conjunction with ChCl for pretreatment; thus, different results are obtained normally, even for the same biomass like corncob (Zhang et al 2016).…”

Section: The Application Of Dess In Biocatalysismentioning

confidence: 99%

Recent progress on deep eutectic solvents in biocatalysis

Zheng

Zong

et al. 2017

Bioresour. Bioprocess.

288

161

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Deep eutectic solvents (DESs) are eutectic mixtures of salts and hydrogen bond donors with melting points low enough to be used as solvents. DESs have proved to be a good alternative to traditional organic solvents and ionic liquids (ILs) in many biocatalytic processes. Apart from the benign characteristics similar to those of ILs (e.g., low volatility, low inflammability and low melting point), DESs have their unique merits of easy preparation and low cost owing to their renewable and available raw materials. To better apply such solvents in green and sustainable chemistry, this review firstly describes some basic properties, mainly the toxicity and biodegradability of DESs. Secondly, it presents several valuable applications of DES as solvent/co-solvent in biocatalytic reactions, such as lipase-catalyzed transesterification and ester hydrolysis reactions. The roles, serving as extractive reagent for an enzymatic product and pretreatment solvent of enzymatic biomass hydrolysis, are also discussed. Further understanding how DESs affect biocatalytic reaction will facilitate the design of novel solvents and contribute to the discovery of new reactions in these solvents.

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Section: The Application Of Dess In Biocatalysismentioning

confidence: 99%

Recent progress on deep eutectic solvents in biocatalysis

Zheng

Zong

et al. 2017

Bioresour. Bioprocess.

288

161

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“…With these characteristics, DESs have been widely utilized in many fields,33, 34, 35, 36, 37 such as metal processing33 and synthesis media or templates 34, 35. DESs also have effects on delignification and can be used in the extraction of bioactives38, 39 and biomass refinery 40, 41, 42, 43, 44, 45, 46, 47. Francisco et al.…”

Section: Introductionmentioning

confidence: 99%

“…[34,35] DESs also have effects on delignification and can be used in the extraction of bioactives [38,39] and biomass refinery. [40][41][42][43][44][45][46][47] Francisco et al reported that aD ES was promising for wheat straw processing because lignin was partially dissolved. [41] Sirviç et al showed that acidic DESs can be hydrolytic media for lignocellulose pretreatment and produce cellulose nanocrystals.…”

Section: Introductionmentioning

confidence: 99%

Efficient Cleavage of Lignin–Carbohydrate Complexes and Ultrafast Extraction of Lignin Oligomers from Wood Biomass by Microwave‐Assisted Treatment with Deep Eutectic Solvent

et al. 2017

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Lignocellulosic biomass is an abundant and renewable resource for the production of biobased value‐added fuels, chemicals, and materials, but its effective exploitation by an energy‐efficient and environmentally friendly strategy remains a challenge. Herein, a facile approach for efficiently cleaving lignin–carbohydrate complexes and ultrafast fractionation of components from wood by microwave‐assisted treatment with deep eutectic solvent is reported. The solvent was composed of sustainable choline chloride and oxalic acid dihydrate, and showed a hydrogen‐bond acidity of 1.31. Efficient fractionation of lignocellulose with the solvent was realized by heating at 80 °C under 800 W microwave irradiation for 3 min. The extracted lignin showed a low molecular weight of 913, a low polydispersity of 1.25, and consisted of lignin oligomers with high purity (ca. 96 %), and thus shows potential in downstream production of aromatic chemicals. The other dissolved matter mainly comprised glucose, xylose, and hydroxymethylfurfural. The undissolved material was cellulose with crystal I structure and a crystallinity of approximately 75 %, which can be used for fabricating nanocellulose. Therefore, this work promotes an ultrafast lignin‐first biorefinery approach while simultaneously keeping the undissolved cellulose available for further utilization. This work is expected to contribute to improving the economics of overall biorefining of lignocellulosic biomass.

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“…Two technical lignins, DES and organosolv lignin isolated from steam pretreated hardwood poplar using a deep eutectic solvent (DES, an emerging solvent for biomass fractionation) and traditional ethanol organosolv, respectively [2, 19], were initially upgraded to their usable form of LNPs using prevalent micellization process. Then, the prepared LNPs were incorporated into the testing polymer poly(vinyl alcohol) (PVA), a biodegradable synthetic polymer material with wide commercial applications, to produce nanocomposite films via the facile solution-cast method.…”

Section: Introductionmentioning

confidence: 99%

Lignin valorization: lignin nanoparticles as high-value bio-additive for multifunctional nanocomposites

Tian

Bao

et al. 2017

Biotechnol Biofuels

269

170

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BackgroundAlthough conversion of low value but high-volume lignin by-product to its usable form is one of the determinant factors for building an economically feasible integrated lignocellulose biorefinery, it has been challenged by its structural complexity and inhomogeneity. We and others have shown that uniform lignin nanoparticles can be produced from a wide range of technical lignins, despite the varied lignocellulosic biomass and the pretreatment methods/conditions applied. This value-added nanostructure lignin enriched with multifunctional groups can be a promising versatile material platform for various downstream utilizations especially in the emerging nanocomposite fields.ResultsInspired by the story of successful production and application of nanocellulose biopolymer, two types of uniform lignin nanoparticles (LNPs) were prepared through self-assembling of deep eutectic solvent (DES) and ethanol-organosolv extracted technical lignins derived from a two-stage fractionation pretreatment approach, respectively. Both LPNs exhibited sphere morphology with unique core–shell nanostructure, where the DES–LNPs showed a more uniform particle size distribution. When incorporated into the traditional polymeric matrix such as poly(vinyl alcohol), these LPN products displayed great potential to formulate a transparent nanocomposite film with additional UV-shielding efficacy (reached ~80% at 400 nm with 4 wt% of LNPs) and antioxidant functionalities (reached ~160 μm mol Trolox g−1 with 4 wt% of LNPs). At the same time, the abundant phenolic hydroxyl groups on the shell of LNPs also provided good interfacial adhesion with PVA matrix through the formation of hydrogen bonding network, which further improved the mechanical and thermal performances of the fabricated LNPs/PVA nanocomposite films.ConclusionsBoth LNPs are excellent candidates for producing multifunctional polymer nanocomposites using facile technical route. The prepared transparent and flexible LNPs/PVA composite films with high UV-shielding efficacy, antioxidant activity, and biocompatibility are promising in the advanced packaging field, which potentially provides an additional high-value lignin product stream to the lignocellulose biorefinery. This study could open the door for the production and application of novel LNPs in the nascent bioeconomy.Graphical abstractLignin nanoparticle for transparent nanocomposite film with UV-shielding efficacy Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-017-0876-z) contains supplementary material, which is available to authorized users.

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Deep eutectic solvent pretreatment and subsequent saccharification of corncob

Cited by 308 publications

References 26 publications

Recent progress on deep eutectic solvents in biocatalysis

Recent progress on deep eutectic solvents in biocatalysis

Efficient Cleavage of Lignin–Carbohydrate Complexes and Ultrafast Extraction of Lignin Oligomers from Wood Biomass by Microwave‐Assisted Treatment with Deep Eutectic Solvent

Lignin valorization: lignin nanoparticles as high-value bio-additive for multifunctional nanocomposites

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