Structural and dynamic changes of lignin in Eucalyptus cell walls during successive alkaline ethanol treatments

Li, Hanyin; Sun, Shao‐Ni; Wang, Chenzhou; Sun, Run‐Cang

doi:10.1016/j.indcrop.2015.04.048

Cited by 47 publications

(36 citation statements)

References 32 publications

(35 reference statements)

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“…Raman spectra were acquired with a confocal Raman microscope (CRM, LabRam Xplora, HORIBA, Kyoto, Japan), which was equipped with a piezo scanner and a high numerical aperture (NA) microscope objective from Olympus (100oil NA = 1.40). The Labspect5 software (HORIBA) was used for measurement setup and image processing to remove spikes, smooth the spectra by the Savitsky-Golay algorithm at a moderate level, correct baselines, and the data was further smoothed by Fourier transformation coupled with cosine apodization function [34][35][36]. Cross sections of 10 µm thickness were cut from wood sample using a rotary microtome RM 2255 (Leica, Wetzlar, Germany) to obtain a full wafer and then covered with glass cover slips.…”

Section: Multi-analysis Of Control and Treated Samplesmentioning

confidence: 99%

Multiple Analysis and Characterization of Novel and Environmentally Friendly Feather Protein-Based Wood Preservatives

Xia

Wang

et al. 2020

Polymers

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In this study, feather was used as the source of protein and combined with copper and boron salts to prepare wood preservatives with nano-hydroxyapatite or nano-graphene oxide as nano-carriers. The treatability of preservative formulations, the changes of chemical structure, micromorphology, crystallinity, thermal properties and chemical composition of wood cell walls during the impregnation and decay experiment were investigated by retention rate of the preservative, Fourier transform infrared spectroscopy (FT-IR), scanning electronic microscopy-energy dispersive spectrometer (SEM-EDS), X-ray diffraction (XRD), thermoanalysis (TG), and confocal Raman microscopy (CRM) techniques. Results revealed that the preservatives (particularly with nano-carrier) successfully penetrated wood blocks, verifying the enhanced effectiveness of protein-based preservative with nano-carrier formulations. Decay experiment demonstrated that the protein-based wood preservative can remarkably improve the decay resistance of the treated wood samples, and it is an effective, environmentally friendly wood preservative. Further analysis of these three preservative groups confirmed the excellent function of nano-hydroxyapatite as a nano-carrier, which can promote the chelation of preservatives with higher content of effective preservatives.

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Section: Multi-analysis Of Control and Treated Samplesmentioning

confidence: 99%

Multiple Analysis and Characterization of Novel and Environmentally Friendly Feather Protein-Based Wood Preservatives

Xia

Wang

et al. 2020

Polymers

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“…The detail method of making up cross section was followed the pattern as previously. 18 The spectra were extracted from the secondary wall (S) and cell corner middle lamella (CCML) of the ber, respectively. Hence, the morphology and distribution of compositions were clearly observed along the prolongation of time.…”

Section: Characterization Of Ball-milled and Regenerated Ballmilled Pmentioning

confidence: 99%

Assessment of structural characteristics of regenerated cellulolytic enzyme lignin based on a mild DMSO/[Emim]OAc dissolution system from triploid of Populus tomentosa Carr.

et al. 2017

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“…The associated polysaccharides in the lignin fractions obtained were determined by HPAEC, and the molecular weights were detected by GPC, which were based on the procedures described in a previous literature (Li et al, 2015). The SEM images of the untreated and pretreated Eucalyptus were recorded with a Hitachi 3400 N scanning electron microscopy (SEM) (S-3400N, HITACHI, Japan) at acceleration voltages of 5 kV.…”

Section: Analysis Proceduresmentioning

confidence: 99%

“…Raman spectra and images of untreated and treated cross sections of Eucalyptus cell walls were obtained on a LabRam Xplora confocal Raman microscope (Horiba Jobin Yvon, Longjumeau, France) according to the procedure described in a recent paper (Li et al, 2015). All experiments in this study were performed in duplicate, and the data listed in tables were the average values.…”

Section: Analysis Proceduresmentioning

confidence: 99%

Structural elucidation of Eucalyptus lignin and its dynamic changes in the cell walls during an integrated process of ionic liquids and successive alkali treatments

Wang

Chen

et al. 2016

Bioresource Technology

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An integrated process based on ionic liquids ([Bmim]Cl and [Bmim]OAc) pretreatment and successive alkali post-treatments (0.5, 2.0, and 4.0% NaOH at 90°C for 2h) was performed to isolate lignins from Eucalyptus. The structural features and spatial distribution of lignin in the Eucalyptus cell wall were investigated thoroughly. Results revealed that the ionic liquids pretreatment promoted the isolation of alkaline lignin from the pretreated samples without obvious structural changes. Additionally, the integrated process resulted in syringyl-rich lignin macromolecules with more β-O-4' linkages and less phenolic hydroxyl groups. Confocal Raman microscopy analysis showed that the dissolution behavior of lignin was varied in the morphologically distinct regions during the successive alkali treatments, and lignin dissolved was mainly stemmed from the secondary wall regions. These results provided some useful information for understanding the mechanisms of delignification during the integrated process and enhancing the potential utilizations of lignin in future biorefineries.

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Structural and dynamic changes of lignin in Eucalyptus cell walls during successive alkaline ethanol treatments

Cited by 47 publications

References 32 publications

Multiple Analysis and Characterization of Novel and Environmentally Friendly Feather Protein-Based Wood Preservatives

Multiple Analysis and Characterization of Novel and Environmentally Friendly Feather Protein-Based Wood Preservatives

Assessment of structural characteristics of regenerated cellulolytic enzyme lignin based on a mild DMSO/[Emim]OAc dissolution system from triploid of Populus tomentosa Carr.

Structural elucidation of Eucalyptus lignin and its dynamic changes in the cell walls during an integrated process of ionic liquids and successive alkali treatments

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