Fabrication of pondcypress fiber with intact structure and multiple active hydroxyl groups by alkali aided two-step mechanical refining

Zou, Xiuxiu; Shen, Kuizhong; Liang, Long; Wang, Jia; Huang, Chen; Wu, Ting; Fang, Guigan

doi:10.1007/s10570-021-03925-4

Cited by 4 publications

(3 citation statements)

References 58 publications

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“…In order to highlight the importance of the surface chemical components, two types of wood fibers were typically selected, among which one was original (with the surface mainly composed of intercellular lignin) and another was pretreated by a two-step pretreatment: chemical impregnation (alkali aided mixed NaOH water solution with H 2 O 2 , Na 2 SiO 3 , diethylenetriaminepentaacetic acid) and two-step chemical refining (with the encapsulated cellulose exposed, and the cellulose accessibility and specific surface area increased but the intact spatial structure preserved at the same time, as shown in Figure a). , The original wood fibers are denoted as WFs, and the pretreated wood fibers are denoted as PWFs, which were supplied by the Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry. Xylan (85% purity) and milled wood lignin were obtained from Aladdin Reagent (Shanghai) Co., Ltd. Tannic acid (TA, C 76 H 52 O 46 ), sodium hydroxide (NaOH, A.R., 95% purity), sodium chlorite (NaClO 2 , 80% purity), hydrogen peroxide (H 2 O 2 , 40% purity), sodium metasilicate nonahydrate(Na 2 SiO 3 , A.R.…”

Section: Methodsmentioning

confidence: 99%

Unraveling the Intricate Interaction: Bonding Mechanism between Tannic Acid and Wood Fibers

Liu,

Ji,

et al. 2024

ACS Sustainable Chem. Eng.

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Due to the biodegradable, biocompatible, sustainable, and renewable properties of lignocellulosic materials, there is growing interest in developing functional materials based on lignocellulosic components using green strategies. For example, the surface of lignocellulosic materials can be modified using polyphenols with inherent characteristics such as metal chelation and reducibility to prepare functional materials with flame retardant, antibacterial, and self-cleaning properties. Understanding the fundamental interaction mechanisms between lignocellulosic materials and polyphenols is crucial for these applications and the design of lignocellulosic-based functional materials. In this study, we used wood fibers (WFs) and tannic acid (TA) as typical representatives of lignocellulosic materials and polyphenols, respectively. We combined adsorption isotherm models and density functional theory simulations to reveal the interaction mechanisms between the main components of WFs (cellulose, hemicellulose, and lignin) and TA. Cellulose and hemicellulose primarily interacted with TA through hydrogen bonding, electrostatic interaction, and hydrophobic interaction, while lignin−TA interactions are hydrogen bonding and electrostatic interaction. For WFs, their pore structure and exposed surface components determined their binding with TA. The adsorption of TA on WFs followed the Langmuir model for monolayer adsorption, with the main driving forces being hydrogen bonding, electrostatic interactions, and van der Waals forces between surface cellulose components and TA. Our findings provide new insights into the interaction mechanisms between lignocellulosic materials and polyphenols, offering valuable guidance for the development of lignocellulosic/polyphenol composite functional materials with environmental, biomedical, and engineering applications.

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Section: Methodsmentioning

confidence: 99%

Unraveling the Intricate Interaction: Bonding Mechanism between Tannic Acid and Wood Fibers

Liu,

Ji,

et al. 2024

ACS Sustainable Chem. Eng.

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“…22 ■ MATERIALS AND METHODS Materials. Poplar, fir, and Masson pine wood fibers were obtained, based on the study by Fang, 23,24 by dual screwing after a 60 min treatment with 3% sodium hydroxide (NaOH) and 5% hydrogen peroxide (H 2 O 2 ) at 90 °C. The solid content in the chemi-mechanical pulp during treatment was 30%.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Figure 1 illustrates a schematic of the self-bonding process. Two types of poplar fibrillated fibers, that is, less exposed from the middle lamella (type I, ≤10%) and more from the S2 cell wall (type II, ≥90%), 23,24 can be observed, as shown in Figure 1a. More S2 cell wall fibrillation led to more surface hydroxyl content, which would improve the efficiency of dialdehyde oxidation.…”

Section: ■ Introductionmentioning

confidence: 99%

High-Performance Lignocellulosic Self-Bonding Composites via Dialdehyde Modification and Water-Involved Low-Temperature Hot Pressing

Zhang

Chen

et al. 2022

ACS Sustainable Chem. Eng.

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Novel lignocellulosic self-bonding materials with high performance and low hygroscopicity are still in demand in the wood industry. We demonstrated a facile and efficient approach to prepare adhesive-free all-lignocellulosic composites with excellent performances via the dialdehyde modification replacing the conventional hydrogen groups. Less than 30% water involved as the plasticizer could successfully optimize the performances of self-bonding composites and, more importantly, realize low-temperature hot pressing at 75 °C. The internal sectional morphology showed that individual wood fiber cells collapsed, and lignin was repolymerized with hemicellulose and cellulose to enhance interfacial bonding. Chemical analysis demonstrated the intra-and intermolecular association of dialdehyde groups. The self-assembly lignocellulosic composites were superior to most of the reported adhesive-free bio-fiber materials, demonstrating better flexural strength (93.7 MPa), internal bond strength (6.2 MPa), tensile strength (20.2 MPa), and hardness (1.0 GPa). Thus, this technology can be extended to different wood species. The thickness swelling rate of lignocellulosic self-bonding composites was only 2.1% after soaking in water for 24 h. In addition, the adhesive-free lignocellulosic composites exhibited plastic body-like behavior and excellent machinability. The applications of all-lignocellulosic self-bonding composites can be extended to high-strength structural buildings and outdoor household material fields, which aligns with the concepts of eco-friendliness, degradation, and carbon storage.

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Chemi-mechanical pulping with selective fiber separation using 2D correlation near-infrared spectroscopy

Liang,

Wu,

Shen

et al. 2024

Cellulose

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Fabrication of pondcypress fiber with intact structure and multiple active hydroxyl groups by alkali aided two-step mechanical refining

Cited by 4 publications

References 58 publications

Unraveling the Intricate Interaction: Bonding Mechanism between Tannic Acid and Wood Fibers

Unraveling the Intricate Interaction: Bonding Mechanism between Tannic Acid and Wood Fibers

High-Performance Lignocellulosic Self-Bonding Composites via Dialdehyde Modification and Water-Involved Low-Temperature Hot Pressing

Chemi-mechanical pulping with selective fiber separation using 2D correlation near-infrared spectroscopy

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