Alkali synergetic two-step mechanical refining pretreatment of pondcypress for the fiber with intact 3D structure and ultrahigh cellulose accessibility fabrication

Zou, Xiuxiu; Liang, Long; Shen, Kuizhong; Huang, Chen; Wu, Ting

doi:10.1016/j.indcrop.2021.113741

Cited by 6 publications

(5 citation statements)

References 33 publications

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“…The details of LCF matrix preparation have been reported in our previous publication . Briefly, the pond cypress sample was well-mixed with 17.5 wt % NaOH, 16% H 2 O 2 , 3 wt % Na 2 SiO 3 ·9H 2 O 2 , and 1.5 wt % DTPA (all based on a dry substrate) at a solid to liquid ratio of 1:5.…”

Section: Methodsmentioning

confidence: 99%

“…The details of LCF matrix preparation have been reported in our previous publication. 31 Briefly, the pond cypress sample was wellmixed with 17.5 wt % NaOH, 16% H 2 O 2 , 3 wt % Na 2 SiO 3 •9H 2 O 2 , and 1.5 wt % DTPA (all based on a dry substrate) at a solid to liquid ratio of 1:5. Then, the mixture was transferred into a KRK-2500 disc refiner (Kumagaya Riki Industry Co., Ltd., Japan) with a speed of 3000 rpm and a gap distance of 0.5 mm for 5 min.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Lignin-Reinforced Paper with Excellent Stability and Thermal Properties for an Efficient Heat Spreader

Zou

Huang

et al. 2022

ACS Sustainable Chem. Eng.

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Cellulosic fiber (CF) has gained extensive attention as the flexible and supporting substrate of silver nanowires (AgNWs) due to its excellent mechanical properties and high specific surface area. However, its susceptibility to corrosion and abrasion still remains a limiting factor for widespread adoption in flexible electronic devices. Herein, we report a lignin-abundant cellulosic fiber (LCF)/AgNW conductive paper synthesized through a sample self-assembly method. Benefiting from the strong chemical/physical properties of the presence of lignin in the LCF, the LCF/AgNW paper was proved to possess enhanced stability to various chemical corrosions and excellent conductive reliability and reusability during mechanical abrasions (i.e., bending and friction). Importantly, the LCF/AgNW paper exhibited a high conductivity of 4561.88 S/cm at the laden AgNWs of 18.57 wt %, much higher than that of the CF/AgNW paper and other reported biomass-based conductive papers. Moreover, the LCF/AgNW paper also showed superior thermal management performances, possessing sensitive temperature driving capacity and rapid heat dispersive capacity. These efforts could provide a facile and feasible route for the design of next-generation heat dissipation components for flexible smart devices.

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Section: Methodsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Lignin-Reinforced Paper with Excellent Stability and Thermal Properties for an Efficient Heat Spreader

Zou

Huang

et al. 2022

ACS Sustainable Chem. Eng.

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“…The dissociation of MFs from the S 2 sublayer of P. massoniana's secondary wall was accomplished via a combined approach encompassing heat-moisture treatment, chemical impregnation, and mechanical re ning, as detailed in our recent study 50 . Brie y, after being cut and chopped into smaller pieces, the wood sample underwent a steam treatment at 105 ℃ for 15 minutes.…”

Section: Dissociation Of Mfs From the S 2 Sublayer Of Secondary Wall ...mentioning

confidence: 99%

Bioaerogels for Ultra-Broadband Perfect Acoustic Absorption

Wan,

Chai,

Shen

et al. 2023

Preprint

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Noise has become the world's second-largest environmental risk factor1-3. The simultaneous achievement of ultra-broadband and perfect acoustic absorption is a quite vital yet long-standing challenge4-11. Herein, we propose a new "gradient pore circulation (GPC)" strategy for building hierarchical ordered architecture of bioaerogels, by using highly active microfibers precisely dissociated from the wood S2 sublayer as basic units. The bioaerogels comprise anisotropic parallelly-layered microchannels, enriched with intricate multilevel pores within each layer, alongside abundant spring-shaped strips bridging these adjacent layers. Under the “GPC” strategy, the soundwaves effortlessly enter the parallelly-layered microchannels possessing moderate flow resistance, while the synergy of long microchannels, multilevel pores, and abundant interlamellar strips create plentiful closed loops, fostering a repetitive cyclic reflection‒friction‒dissipation of soundwaves. The bioaerogels achieve near-perfect acoustic absorption abilities, with a sound-absorption-coefficient of 0.95~1 across an ultra-broad frequency range of 520‒6300 Hz and a superb noise-reduction-coefficient of 0.82, the highest recorded to date. More importantly, the sound absorption properties retain almost unchanged at extreme temperatures (‒60~+60 ºC) over three months. The revolutionary bioaerogels hold great promise as sustainable sound absorption materials for diverse applications.

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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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Alkali synergetic two-step mechanical refining pretreatment of pondcypress for the fiber with intact 3D structure and ultrahigh cellulose accessibility fabrication

Cited by 6 publications

References 33 publications

Lignin-Reinforced Paper with Excellent Stability and Thermal Properties for an Efficient Heat Spreader

Lignin-Reinforced Paper with Excellent Stability and Thermal Properties for an Efficient Heat Spreader

Bioaerogels for Ultra-Broadband Perfect Acoustic Absorption

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

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