Analysis of phenolation potential of spruce kraft lignin and construction of its molecular structure model

Zhang, Haonan; Ren, Hao; Zhai, Huamin

doi:10.1016/j.indcrop.2021.113506

Cited by 26 publications

(12 citation statements)

References 48 publications

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“…Therefore, the usual method of quantifying lignin unit linkage bonds by integrating the Cα-H signal was no longer applicable. In our previous study [ 31 ], we discovered appropriate agreement between the ratios of the linkage bonds by integrating the Cγ-H signal peaks of β-O-4, β-5, and β-β in MWL and comparing them with the Cα-H signal peaks. The contents of β-O-4, β-5, and β-β in AHLC and AHMWL were 74.72, 14.92, and 9.37% and 72.51, 16.95, and 10.54%, respectively.…”

Section: Resultsmentioning

confidence: 90%

“…Based on the 1 H NMR integral values, the contents of p -cresol in AHLC and RSLC were calculated to be 0.77 and 0.79 mol/C9, respectively; the relatively lower content of p -cresol in AHLC than that in RSLC was attributed to the higher lignification degree and more compact cell wall structure of areca nut husk than those of rice straw. Additionally, the intensities of the absorption peaks at 1.6–2.4 ppm corresponding to 1 H of the methyl group were significantly higher for AHLC and RSLC as compared to those for AHMWL and RSMWL, implying successful introduction of p -cresol into the natural lignin structure [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

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Study on Dissociation and Chemical Structural Characteristics of Areca Nut Husk

et al. 2023

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From the perspective of full-component utilization of woody fiber biomass resources, areca nut husk is an excellent woody fiber biomass feedstock because of its fast regeneration, significant regeneration ability, sustainability, low cost, and easy availability. In this study, fiber cell morphologies, chemical compositions, lignin structures, and carbohydrate contents of areca nut husks were analyzed and compared with those of rice straw, and the application potentials of these two materials as biomass resources were compared. We found that areca nut husk fibers were shorter and wider than those of rice straw; areca nut husk contained more lignin and less ash, as well as less holocellulose than rice straw; areca nut husk and rice straw lignin were obtained by ball milling and phase separation, and areca nut husk lignin was found to be a typical GHS-type lignin. Herein, the yield of lignocresol was higher than that of milled wood lignin for both raw materials, and the molecular size was more homogeneous. Tricin structural monomers were discovered in the lignin of areca nut husk, similar to those present in other types of herbaceous plants. Structures of areca nut husk MWL (AHMWL) and AHLC were comprehensively characterized by quantitative NMR techniques (that is, 1H NMR, 31P NMR, and 2D NMR). The molecular structure of AHLC was found to be closer to the linear structure with more functional groups exposed on the molecular surface, and the hydroxyl-rich p-cresol grafting structure was successfully introduced into the lignin structure. In addition, the carbohydrate content in the aqueous layer of the phase separation system was close to the carbohydrate content in the raw material, indicating that the phase separation method can precisely separate lignin from carbohydrates. These experimental results indicate that the phase separation method as a method for lignin utilization and structure study has outstanding advantages in lignin structure regulation and yield, and areca nut husk lignin is suitable for application in the same phase separation systems as short-period herbs, such as rice straw and wheat grass, and has the advantages of low ash content and high lignification degree, which will provide guidance for the high-value utilization of areca nut husk in the future.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Study on Dissociation and Chemical Structural Characteristics of Areca Nut Husk

et al. 2023

Self Cite

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“…Phenolation is the process to treat lignin with phenol in an acid solution, which causes the phenol to condense with the aromatic compounds and functional groups of lignin. , Though lignin is technically applied widely in formaldehyde resin, the usage of large amounts is still restricted by the lack of reactive groups. By adding phenol, more phenolic hydroxyl groups were grafted to lignosulfonate, which boosts lignin’s reactivity; this reaction is the most used transformation of the chemical .…”

Section: Modification Of Ligninmentioning

confidence: 99%

Lignin Modification for Enhanced Performance of Polymer Composites

Taher,

Wang,

Faridul Hasan

et al. 2023

ACS Appl. Bio Mater.

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“…This results in the subsequent derivation of various new complex structures. KL changes with the change in the biomass raw materials and the production processes, which limits the efficient use of KL [ 10 , 11 , 12 ]. Therefore, the realization of high value-added utilization of lignin is the main driving force in utilizing renewable biomass resources [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication Mechanisms of Lignin Nanoparticles and Their Ultraviolet Protection Ability in PVA Composite Film

Zhang

Tian

et al. 2022

Polymers

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Lignin is an indispensable and essential compound present in plants. It is a renewable resource and a green alternative to traditional petroleum energy. The rational utilization of lignin can reduce the environmental damage caused by traditional industrial development. The preparation of lignin nanoparticles (LNPs) using the self-assembly method is one of the most favorable ways to achieve high value-added utilization of lignin. However, the process requires an in-depth understanding of the sphere-forming mechanism of lignin self-assembly and the interaction of self-assembly forces. We used the same raw materials and two different preparation methods to prepare LNPs. The results revealed that the variation in the order of the dropwise addition of lignin solution and deionized water produced LNPs with varying average sizes. The sphere-forming mechanisms of the two kinds of lignin nanoparticles were discussed for the preparation of UV-resistant polyvinyl alcohol (PVA) polymeric films. During lignin spherification, the faster the solution reaches the supersaturation state, the faster the spherogenesis rate is, the smaller the size is, and the narrower the particle size distribution is. The lignin micro/nanospheres are produced by exploiting the π–π bonding interactions in lignin itself. The lignin micro/nanospheres are then mixed with PVA to form a film to obtain a lignin–PVA composite film material with an anti-UV effect.

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Analysis of phenolation potential of spruce kraft lignin and construction of its molecular structure model

Cited by 26 publications

References 48 publications

Study on Dissociation and Chemical Structural Characteristics of Areca Nut Husk

Study on Dissociation and Chemical Structural Characteristics of Areca Nut Husk

Lignin Modification for Enhanced Performance of Polymer Composites

Fabrication Mechanisms of Lignin Nanoparticles and Their Ultraviolet Protection Ability in PVA Composite Film

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