Depolymerization of crystalline cellulose catalyzed by acidic ionic liquids grafted onto sponge-like nanoporous polymers

Liu, Fujian; Kamat, Ranjan K.; Noshadi, Iman; Peck, Daniel C.; Parnas, Richard S.; Zheng, Anmin; Qi, Chenze; Lin, Yao

doi:10.1039/c3cc44703k

Cited by 53 publications

(34 citation statements)

References 18 publications

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“…Total reducing sugar (TRS) : The TRS method was thought to be a reliable technology to evaluate the degree of depolymerization of microcrystalline cellulose, which was tested through the 3,5‐dinitrosalicylicacid (DNS) method . Typically, a reaction mixture contained 0.5 mL of 3,5‐dinitrosalicylicacid (DNS) reagent; 0.5 mL of the isolated reaction mixture was heated for 5 min at 100 °C.…”

Section: Methodsmentioning

confidence: 99%

Ordered Mesoporous Polymers for Biomass Conversions and Cross‐Coupling Reactions

Liu

et al. 2016

ChemSusChem

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Amino group-functionalized, ordered mesoporous polymers (OMP-NH2 ) were prepared using a solvent-free synthesis by grinding mixtures of solid raw precursors (aminophenol, terephthaldehyde), using block copolymer templates, and curing at 140-180 °C. OMP-NH2 was functionalized with acidic sites and incorporated with palladium, giving multifunctional solid catalysts with large Brunauer-Emmett-Teller (BET) surface areas, abundant and ordered mesopores, good thermal stabilities, controllable concentrations, and good dispersion of active centers. The resultant solid catalysts showed excellent catalytic activities and good reusability in biomass conversions and cross-coupling reactions-much superior to those of various reported solid catalysts such as Amberlyst 15, SBA-15-SO3 H, and Pd/C and comparable to those of homogeneous catalysts such as heteropoly acid, HCl, and palladium acetate. A facile green approach was developed for the synthesis of ordered mesoporous polymeric solid catalysts with excellent activities for conversion of low-cost feedstocks into useful chemicals and clean biofuels.

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Section: Methodsmentioning

confidence: 99%

Ordered Mesoporous Polymers for Biomass Conversions and Cross‐Coupling Reactions

Liu

et al. 2016

ChemSusChem

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“…Determination of Water-Soluble Oligomers. The total reducing sugar (TRS) was quantified using the 3,5-dinitrosalicylic acid (DNS) assay [20]. DNS reagent (2.0 mL) was added to the liquid fraction (1.0 mL) and heated in a boiling water bath for about 10 min.…”

Section: Determination Of Degree Of Polymerization (Dpw)mentioning

confidence: 99%

Controlled Depolymerization of Cellulose Fibres Isolated from Lignocellulosic Biomass Wastes

Pang

Voon

Chin

2018

International Journal of Polymer Science

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Various types of lignocellulosic biomass wastes (LBW) had been successfully converted into cello-oligomers with different chain lengths via a controlled depolymerization process. Cellulose fibres isolated from LBW samples were dissolved with room temperature ionic liquid (RTIL) in the presence of an acid catalyst, Amberlyst 15 DRY. The effects of reaction time on the degree of polymerization and yields of water-insoluble cello-oligomers formed were studied. Besides, the yields of water-soluble cello-oligomers such as glucose and xylose were also determined. The depolymerization of cellulose fibres isolated from LBW was observed to follow both second-order and pseudo-second order kinetics under specific conditions. As such, cello-oligomers of controllable chain lengths could be obtained by adjusting the duration of depolymerization process under optimized conditions.

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“…The total reducing sugar (TRS) concentration of depolymerization products was determined by the 3,5-dinitrosalicylic acid (DNS) assay [28]. Typically, a filtered depolymerized sample solution (1 mL) was placed in a test tube and then DNS reagent (2 mL) was added.…”

Section: Determination Of Total Reducing Sugarmentioning

confidence: 99%

Conversion of Sago (Metroxylon sagu) Pith Waste to Fermentable Sugars via a Facile Depolymerization Process

Pang

Voon

Chin

2017

Appl Biochem Biotechnol

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The conversion of starchy sago (Metroxylon sagu) pith waste (SPW), a lignocellulosic biomass waste, to fermentable sugars under mild conditions had been successfully demonstrated. The optimum depolymerization of SPW was achieved at 2 wt% sample loading which was catalyzed by 100 mM of oxalic acid in the presence of 25 wt% NaCl solution at 110°C for 3 h. Up to 97% SPW sample was being converted into fermentable sugars with limited formation of by-products after two sequential depolymerization cycles. Both reaction temperature and concentration of oxalic acid were crucial parameters for the depolymerization of SPW which exhibited a high selectivity for the production of glucose over other reducing sugars.

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Depolymerization of crystalline cellulose catalyzed by acidic ionic liquids grafted onto sponge-like nanoporous polymers

Cited by 53 publications

References 18 publications

Ordered Mesoporous Polymers for Biomass Conversions and Cross‐Coupling Reactions

Ordered Mesoporous Polymers for Biomass Conversions and Cross‐Coupling Reactions

Controlled Depolymerization of Cellulose Fibres Isolated from Lignocellulosic Biomass Wastes

Conversion of Sago (Metroxylon sagu) Pith Waste to Fermentable Sugars via a Facile Depolymerization Process

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