Sequential transformation and utilization of natural network polymer “LIGNIN”

Funaoka, Masamitsu

doi:10.1016/j.reactfunctpolym.2012.05.010

Cited by 40 publications

(18 citation statements)

References 30 publications

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“…This indicated that the yield of LCs was much higher than that from MWL, although it was lower than the LCs yields from woody plants [11]. This might be attributed to the loose cell wall structure of herbaceous plants and a lower degree of lignification compared to wood [15,16,17]. During the phase separation process, the lignin skeleton was selectively cleaved, resulting in many relatively small molecular lignin products [7,8].…”

Section: Resultsmentioning

confidence: 99%

Structural Characterization of Lignocresols from Transgenic and Wild-Type Switchgrass

et al. 2018

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Cafferic acid-O-methyltransferases (COMT) down-regulated transgenic and wild-type switchgrass were separated into lignocresols (LCs) and sugars by a phase separation method involving 72% sulfuric acid and cresol. The isolated LCs were characterized by FTIR, GPC, 1 H NMR and 2D-HSQC to understand potential structural modification caused by transgenic engineering lignin or phase separation treatment. No significant changes were found in terms of molecular weights and the amount of incorporated p-cresols between transgenic and wild-type switchgrass LCs. However, the compositions, ratios of syringyl (S) units to guaiacyl (G) units, were changed significantly leading to decrease in S units and increase in G units for transgenic switchgrass LC. The benzodioxane structures and 5-hydroxyguaiacyl units were observed in the 2D-HSQC implied that 5-hydroxyconiferyl alcohol was incorporated into lignin as a result of COMT-down-regulation in the transgenic process.

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Section: Resultsmentioning

confidence: 99%

Structural Characterization of Lignocresols from Transgenic and Wild-Type Switchgrass

et al. 2018

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“…LC was synthesized from a standard Indulin AT lignin (kindly provided by MeadWestvaco Corporation), extracted from the residual liquor resulting from the Kraft pulping process of Pinus spp. The methodology performed to synthesis, called phase separation, was adapted from Funaoka [ 15 ]. For LC synthesis, a total of 20 mL of 72% sulfuric acid was added to 1 g of lignin with 10 mL of p-cresol.…”

Section: Methodsmentioning

confidence: 99%

Studies of adsorptive capacity of bacterial β-glucosidases on lignocresol aiming the enzymatic recycling in bioprocesses

Ferreira

Zuccari

Garcia

et al. 2019

Biotechnology Reports

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Highlights Lignocresol has great capacity for use in recovery and enzymatic recycling in bioprocesses due to its adsorptive capacity. The adsorption of TpBgl3 to Lignocresol is higher compared to TpBgl1. The interactions between lignocresol and enzymes are influenced by electrostatic characteristics, and surface hydrophobicity. Glucose does not affect the adsorption of enzymes onto lignocresol. TpBgl1 bound to lignocresol maintains a residual enzymatic activity.

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“…interaction (thought to be fairly weak), which is directly related to how fluffy the FSF sheets were in comparison to the SF sheets, at the same density (80 g/m 2 ). Meanwhile, Lps have comparatively smaller molecular weight, higher contents of active functional groups, and better solubility in common organic solvents (Funaoka and Fukatsu 1996;Ren and Funaoka 2007;Funaoka 2013). The tightness, intensity of sheets, and the interaction among fibers were clearly increased after treatment with Lps because of the physical interactions between the active functional groups of Lps and the hydroxyls on the surface of the pulp fibers.…”

Section: Sheet Physical Propertiesmentioning

confidence: 99%

Characterization and Application of Bamboo (Sinocalamus affinis) Lignophenols in Lignophenols-Pulp Sheet Composites

Dai¹,

Qian²,

Ren³

et al. 2015

BioResources

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Bamboo (Sinocalamus affinis) lignophenols (Lps), synthesized using a phase separation system, were used as a natural plasticizing additive to complex with pulp (short fiber and fluffy short fiber) sheets. The structural features of Lps were analyzed by gel permeation chromatography (GPC), Fourier transform infrared (FT-IR) spectroscopy, and proton-nuclear magnetic resonance ( 1 H-NMR). The pulp sheet absorptivity of Lps, as well as the physical properties of complex sheets, were discussed. Results showed that when the concentration of bamboo Lps solution was 10 g/L, the absorption amount of Lps in the sheets made up of short pulp fibers (12%) was slightly higher than that of sheets made of fluffy short pulp fibers (10%), while physical properties, such as tightness, tensile strength, elongation, bursting, and tearing, were improved obviously after the addition of Lps. More obvious improvement in the physical strength was found in sheets made up of fluffy short pulp fibers. Results indicated that the amount of absorbed Lps was of the same importance as the properties of the pulp fibers. It is necessary to adjust the properties of both the Lps and sheets to get the best mechanical strength for the pulp sheets.

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Sequential transformation and utilization of natural network polymer “LIGNIN”

Cited by 40 publications

References 30 publications

Structural Characterization of Lignocresols from Transgenic and Wild-Type Switchgrass

Structural Characterization of Lignocresols from Transgenic and Wild-Type Switchgrass

Studies of adsorptive capacity of bacterial β-glucosidases on lignocresol aiming the enzymatic recycling in bioprocesses

Characterization and Application of Bamboo (Sinocalamus affinis) Lignophenols in Lignophenols-Pulp Sheet Composites

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