Exploration of effect of delignification on the mesopore structure in poplar cell wall by nitrogen absorption method

Liang, Rui; Zhu, Yuhui; Wen, Liang; Zhao, Wan-Wan; Kuai, Bingbin; Zhang, Yaoli; Cai, Liping

doi:10.1007/s10570-019-02921-z

Cited by 41 publications

(14 citation statements)

References 42 publications

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“…Liang et al. [ 109 ] evaluated the effects of increasing the percentage of lignin removal on the mesopore structure in poplar cell walls by the nitrogen absorption method. First, DW strips were ground and passed through a 150‐mesh screen.…”

Section: Influence Of Delignification On Wood Propertiesmentioning

confidence: 99%

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Delignified Wood from Understanding the Hierarchically Aligned Cellulosic Structures to Creating Novel Functional Materials: A Review

Kumar

Jyske

Petrič

2021

Advanced Sustainable Systems

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performance environmentally friendly materials. This is because new processes will be required that allow control on all hierarchical levels. Wood is well defined as a biological engineering material with a complex hierarchical structure of organic material based on cellulose fibrils embedded in a matrix of hemicelluloses and lignin. [1,2] Wood has long been used as a construction material, as well as for pulp and paper production. These applications are highly dependent on the properties of lignin in wood. Removal of lignin is the key step in pulp and paper production, in addition to the conversion of biomass to liquid biofuels. Lignin was first discovered in wood by Anselme Payen in 1839, [3] as the incrusting material that must be removed to isolate the useful fibers in wood. Research pertaining to wood nanotechnology or functional wood materials is a rapidly emerging field. Functional wood materials are mostly fabricated by treating hierarchical natural templates (wood cell wall) by chemical and thermal means. These treatments selectively modify the wood cell wall structure (fine pore spaces and inner lumen surface area) for different applications. [4] The pore region and inner lumen surface have actively been modified to enhance the bulk properties of wood using organic chemicals, [5] inorganic chemicals, organic-inorganic chemicals, [6,7] and thermal methods. [8] Hybrid wood scaffolds have been prepared for diverse applications such as magnetic wood, [9,10] as well as wood-mineral and wood-metal hybrids. [11] Recent research on delignified wood (DW) has emerged from the classical pulp production method. In the preparation of DW, the embedded lignin is removed from the wood cell wall structure, while maintaining the natural hierarchical cellulosic structure. [12] Initially, DW was prepared in order to understand the unknown ultrastructure of wood cell walls. However, since 2015, research in this area has rapidly expanded to focus on the development of wood-based functional scaffolds. Within the literature, DW is predominantly prepared using alkaline delignification methods such as Kraft pulping (a mixture of sodium hydroxide (NaOH) and sodium sulfite (Na 2 SO 3 )) heated to boiling temperature), followed by bleaching using hydrogen peroxide (H 2 O 2 ) to remove the lignin. DW is chemically hydrophilic due to the presence and exposure of hydroxyl groups and possible sites for DW functionalization. DW scaffolds have been functionalized

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Section: Influence Of Delignification On Wood Propertiesmentioning

confidence: 99%

Section: Influence Of Delignification On Wood Propertiesmentioning

confidence: 99%

Delignified Wood from Understanding the Hierarchically Aligned Cellulosic Structures to Creating Novel Functional Materials: A Review

Kumar

Jyske

Petrič

2021

Advanced Sustainable Systems

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“…The main reason for the collapse of the mesopores can be explained by hornification effects caused by air drying (Lovikka et al 2016). It is also possible that due to the vigorous agitation of the pulp in water, hemicelluloses may rearrange in the cell wall filling some of the larger mesopores (Liang et al 2020;Kimura et al 2013). Further removal of hemicellulose would increase hornification, resulting in further collapse of mesopores as shown in (Oksanen et al 1997).…”

Section: Morphological Properties Of Fibres and Foammentioning

confidence: 99%

“…After pulping, the hierarchical pore structure of wood fibres remains. However, the pore size distribution changes with the removal of lignin and hemicellulose from the cell wall (Stone and Scallan 1965;Maloney and Paulapuro 1999;Fahlén and Salmén 2005;Liang et al 2020). Furthermore, kinks and microcompressions in pulp fibres induce the creation of pores in the cell wall (Grönqvist et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Sound absorption properties of wood-based pulp fibre foams

et al. 2021

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In this study, sound absorbing materials were produced through foam forming technique using hardwood and softwood pulps with varying chemical composition, ultrastructural, and morphological properties as raw materials. The sound absorption properties of the produced foams were measured and related to the ultrastructure and the morphology of the pulp fibres. All the fibre foams provided sound absorption properties comparable to those of conventional porous materials used for acoustic purposes. In general, further processing, as well as smaller fibre dimensions contribute to improve the sound absorption properties of the pulp fibre foams. The results provide valuable insight on the optimization of wood-based sound absorbing materials. Graphic abstract

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“…Pore distribution of cell walls tested by NMR cryoporometry was obviously different from that by nitrogen sorption method, which effectively detected mesopores (2~50 nm). For nitrogen sorption, pore volume with the diameters between 2 and 10 nm was dominated and more than that with the diameters exceeding 10 nm [ 33 , 48 ]. Moreover, pore volume was almost zero at the diameters of 30~50 nm [ 33 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Furfurylation on Hierarchical Porous Structure of Poplar Wood

et al. 2020

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Some wood properties (such as permeability and acoustic properties) are closely related to its hierarchical porous structure, which is responsible for its potential applications. In this study, the effect of wood impregnation with furfuryl alcohol on its hierarchical porous structure was investigated by microscopy, mercury intrusion porosimetry and nuclear magnetic resonance cryoporometry. Results indicated decreasing lumina diameters and increasing cell wall thickness of various cells after modification. These alterations became serious with enhancing weight percent gain (WPG). Some perforations and pits were also occluded. Compared with those of untreated wood, the porosity and pore volume of two furfurylated woods decreased at most of the pore diameters, which became more remarkable with raising WPG. The majority of pore sizes (diameters of 1000~100,000 nm and 10~80 nm) of macrospores and micro-mesopores of two furfurylated woods were the same as those of untreated wood. This work could offer thorough knowledge of the hierarchical porous structure of impregnatedly modified wood and pore-related properties, thereby providing guidance for subsequent wood processing and value-added applications.

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Exploration of effect of delignification on the mesopore structure in poplar cell wall by nitrogen absorption method

Cited by 41 publications

References 42 publications

Delignified Wood from Understanding the Hierarchically Aligned Cellulosic Structures to Creating Novel Functional Materials: A Review

Delignified Wood from Understanding the Hierarchically Aligned Cellulosic Structures to Creating Novel Functional Materials: A Review

Sound absorption properties of wood-based pulp fibre foams

Effect of Furfurylation on Hierarchical Porous Structure of Poplar Wood

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