摘要：
Lithium-sulfur batteries (LSBs) are considered promising candidates for next-generation battery technologies owing to their outstanding theoretical energy density and cost-effectiveness. However, the low conductivity and polysulfide shuttling effect of S cathodes severely hamper the practical performance of LSBs. Herein, in situ-generated single layer MXene nanosheet/hierarchical porous carbonized wood fiber (MX/PCWF) composites are prepared via a nonhazardous eutectic activation strategy coupled with pyrolysis-induced gas diffusion. The unique architecture, wherein single layer MXene nanosheets are constructed on carbonized wood fiber walls, ensures rapid polysulfide conversion and continuous electron transfer for redox reactions. The C-Ti-C bonds formed between MXene and PCWF can considerably expedite the conversion of polysulfides, effectively suppressing the shuttle effect. An impressive capacity of 1301.1 mA h g -1 at 0.5 C accompanied by remarkable stability is attained with the MX/ PCWF host, as evidenced by the capacity maintenance of 722.6 mA h g -1 after 500 cycles. Notably, the MX/PCWF/S cathode can still deliver a high capacity of 886.8 mA h g -1 at a high S loading of 5.6 mg cm -2 . The construction of two-dimensional MXenes on natural wood fiber walls offers a competitive edge over S-based cathode materials and demonstrates a novel strategy for developing high -performance batteries. (c) 2024 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
通讯机构：
[Wu, YQ; Qing, Y ] C;[Su, ZP ] S;Sichuan Agr Univ, Coll Forestry, Chengdu 611130, Peoples R China.;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.
关键词：
wood;wood sponge;laminar structure;pressure sensor;early fire alarm
摘要：
High-temperature affordable flexible polymer-based pressure sensors integrated with repeatable early fire warning service are strongly desired for harsh environmental applications, yet their creation remains challenging. This work proposed an approach for preparing such advanced integrated sensors based on silver nanoparticles and an ammonium polyphosphate (APP)-modified laminar-structured bulk wood sponge (APP/Ag@WS). Such integrated sensors demonstrated excellent fire warning performance, including a short response time (minimum of 0.44 s), a long-lasting alarm time (>750 s), and reliable repeatability. Moreover, it achieved high-temperature affordable flexible pressure sensing that exhibited an almost unimpaired working range of 0-7.5 kPa and a higher sensitivity (in the low-pressure range, maximum to 226.03 kPa(-1)) after fire. The high stability was attributed to reliable structural elasticity, and the wood-derived amorphous carbon is capable of repeatable fire warnings. Finally, a Ag@APP/WS-based wireless fire alarm system that realized reliable house fire accident detection was demonstrated, showing great promise for smart firefighting application.
摘要：
Lithium-sulfur batteries (LSBs) have garnered considerable attention as one of the most promising candidates for future energy storage systems. Electrochemical reactions based on lithium and sulfur exhibit remarkable characteristics, including high specific energy density (2600 Wh kg- 1) and high theoretical specific capacity (1675 mAh g- 1), equivalent to three to five times those of lithium-ion batteries. However, the low electrical conductivity of sulfur, shuttle effect of polysulfides, and issue of volume expansion during charge-discharge processes hinder the commercial application of LSBs. Among numerous sulfur host materials, plant-derived porous carbon materials are specifically promising owing to their strong physical and chemical adsorption, cost-effectiveness, abundant sources, and environmental friendliness. Herein, we present a comprehensive review of the application of plant-derived porous carbon materials in LSBs. Furthermore, we summarize recent methods for preparing porous carbon derived from plant sources and discuss the influence of the composition and structure of plant precursors on the structure of the resulting product, focusing on their structure-property relationship concerning the electrochemical performance in LSBs. An analysis and summary of the issues associated with plant-derived porous carbon materials in LSBs are provided, along with an outlook on their research prospects.
摘要：
Lightweight polymer composites promise incredible applications in aerospace, seaprobes, and medical apparatus. However, their performance is generally limited by a trade-off between mechanical strength and toughness. Herein, a crystallinity mitigating strategy driven by highly aligned bamboo macrofibers embedded in a polycaprolactone polyol (PCL) matrix for producing ultrastrong and tough lightweight polymer composites is proposed. The embedded bamboo macrofibers have oxygen-containing functional groups on the fiber surface, that can interact with functional groups (ester and hydroxyl groups) in the molecular chains of the PCL in the form of hydrogen bonds, thus preventing the aggregation of molecular chains and the crystallization of PCL, which ultimately leads to unprecedented toughness. Meanwhile, the bamboo macrofibres with intrinsically aligned microstructure, can enable effective stress transfer and dissipation, providing remarkable ultrahigh strength. As a result, the obtained lightweight polymer composite achieves ultrahigh mechanical strength (31.5 MPa) and superior toughness (21.7 MJ m-3) at an unprecedented low density (1.07 g cm-3), representing the state-of-the-art in reported lightweight polymers. Such lightweight polymer composite has the potential to greatly expedite the practical realization of artificial medical materials, including orthopedic instruments and joint prostheses. Herein, a crystallinity mitigation strategy driven by the embedding of highly aligned bamboo fibers into a polycaprolactone polyol (PCL) matrix is employed. At the same time, the bamboo fibers have an inherently aligned microstructure to effectively dissipate stress, and the resulting lightweight PCL composite achieves superior mechanical strength and excellent toughness at unmatched low density. image
期刊：
European Polymer Journal,2024年210:113002 ISSN：0014-3057
通讯作者：
Liu, M
作者机构：
[Liu, Xuan; Li, Xingong; Wu, Yiqiang; Liu, Ming; Liu, M; Ren, Fantao; Chen, Guihua; Li, Jinxia; Qing, Yan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410000, Peoples R China.;[Liu, Xuan; Liu, Ming; Ren, Fantao; Li, Jinxia] Guangxi Fenglin Wood Ind Grp Co Ltd, Nanning 530000, Peoples R China.
通讯机构：
[Liu, M ] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410000, Peoples R China.
关键词：
Soybean protein isolate;Urea;Urea-formaldehyde resin;Medium-density fiberboard
摘要：
Urea-formaldehyde (UF) resin is one of the most widely used resin adhesive for wood-based panels. The main concern of UF resin bonded wood-based panels is formaldehyde emission and poor water resistance. In this study, activated soybean protein isolate (SPI) was used to modify UF resin for the production of eco-friendly fiberboard panels. The effects of different activated SPI on the properties of UF resins and the resin bonded medium-density fiberboard (MDF) panels were investigated. The free formaldehyde content of the urea-activated SPI modified UF resin was only 0.13 %. Approximately 27.8 % lower than that of the unmodified UF resin. The resin bonded MDF panel with a density of 760 kg/m3 shows a modulus of rupture (MOR) and modulus of elasticity (MOE) of 45.73 MPa and 4005 MPa, which is increased by 25 % and 15 % compared to the unmodified UF resin group. The internal bonding strength (IB) reaches 0.71 MPa, which is about 15 % higher than that of the unmodified UF resin group. The tested 24-hour thickness swelling (24 h TS) of the modified UF resin group is only 8.1 %. The tested formaldehyde content of the sodium dodecyl sulfate (SDS)-activated SPI modified UF resin bonded MDF panel is only 4.8 mg/100 g, which is 20 % lower than that of the control UF resin group. The activated SPI modified UF resin shows great improvement in bonding strength and lower formaldehyde content for MDF panels as compared to the pure UF resin. The chemical groups, crystalline properties, and thermal stability of the pure and the modified UF resins were characterized via Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric (TG) analysis. It is confirmed that the activated SPI modified UF resin has similar chemical structure, higher ratio of crystalline regions, and slightly lower thermal stability with compared to the pure UF resin. This study proposes a practical and applicable solution for the utilization of ecofriendly UF resin in wood-based panel production.
摘要：
The discharge of oily wastewater in daily life and industrial production has inflicted severe damage on the natural environment and human health. Therefore, it is urgent to separate oily wastewater. Herein, a rosin-based polymer (poly(DR-DMP)) was prepared by polymerization of double-bond functionalized rosin acid (DR) and diethyl(methacryloyloxymethyl)phosphonate (DMP). And a novel superhydrophobic cotton fabric was constructed by poly(DR-DMP) and nano-hydroxyapatite (HAP). The water contact angle (WCA) and sliding angle (SA) of poly(DR-DMP)@HAP fabric achieved values of 162 degrees and 8 degrees, respectively. Meanwhile, the poly(DR-DMP) @HAP fabric had excellent separation performance for several oil/water mixtures, with oil fluxes up to 8941.83 L.m(-2).h(-1) and separation efficiency (more than 95.35 %). Furthermore, the poly(DR-DMP)@HAP fabric exhibited excellent separation performance for various emulsions, and also had excellent superhydrophobicity and oil/water separation performance after mechanical and chemical treatment. Through the vertical flame test (VFT) and thermogravimetric analysis (TG), the results showed that poly(DR-DMP)@HAP fabric had a certain flame retardancy. Overall, poly(DR-DMP)@HAP fabric had excellent superhydrophobicity, self-cleaning, oil/water separation and flame retardancy, which had great application potential in oil/water separation.
摘要：
Nanostructured bismuth oxide bromide (BiOBr) has attracted considerable attention as a visible light catalyst. However, its photocatalytic degradation efficiency is limited by its low specific surface area. In this study, a solvothermal approach was employed to synthesize BiOBr, which was subsequently loaded onto cellulose nanofibers (CNFs) to obtain a bismuth halide composite catalyst. The performance of this catalyst in the removal of refractory organic pollutants such as tetracycline (TC) from solutions under visible light excitation was examined. Our results indicate that BiOBr/CNF effectively removes TC from the solution under light conditions. At a catalyst dosage of 100 mg/L, the removal efficiency for TC (with an initial concentration of 100 mg/L) was 94.2%. This study elucidates the relationship between the microstructure of BiOBr/CNF composite catalysts and their improved photocatalytic activity, offering a new method for effectively removing pollutants from water.
摘要：
To ensure the long-term fire-retardant (FR) and anti-mildew (AM) of bamboo materials when employed in outdoor settings susceptible to rainfall exposure, high durability is essential. In this study, we achieved water-leaching resistance of FR and AM bamboo through the in situ synthesis of phosphotungstic acid (PW) and silver nitrate (AG) via vacuum-pressure impregnation. The successful synthesis of the nanospheres within the bamboo (referred to as PWAG-B) was confirmed by TEM, FTIR, and XPS. These nanospheres remained intact within the bamboo cell wall after being subjected to a leaching test, with only a negligible mass loss of 0.88 % and virtually no traces of Ag and W in the leachate for PWAG-B1. Furthermore, the treated bamboo exhibited superior AM properties, with complete resistance against two types of mildew, namely Botryodiplodia theobromae and Alternaria alternate, as well as stain fungi including Aspergillus niger and Penicillum citrinum. Notably, the treated bamboo displayed reduced thermal and smoke parameters in comparison to untreated bamboo, along with a delayed ignition time. This long-term AM and FR bamboo has the potential for the development of eco-friendly outdoor building materials.
摘要：
Metal-organic frameworks (MOFs) are high surface area porous materials with uniform pores. MOFs are among the widely investigated porous materials because of their potential applications in adsorption, oil-water separation, catalysis, and other such applications. However, MOFs are not stable enough in aqueous environments, which restricts their application in practice. We converted hydrophilic UiO-66-SH into hydrophobic UiO-66-RA by introducing rosin acid into organic linkers. The material was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The superhydrophobic UiO-66-RA was successfully constructed and the water droplet contacts angle reached 157.2 degrees. Importantly, the obtained UiO-66-RA demonstrated stable oil-water separation performance, with separation efficiencies of up to 96.1% and 96.8% for both light and heavy oils. The separation efficiencies also reached more than 95.1% after five repetitions. For stable oil-water emulsions, UiO-66-RA also achieved effective separation. In addition, the catalyst Pd@UiO-66-RA was successfully prepared by hybridization of palladium chloride with UiO-66-RA. The catalytic yields of Pd@UiO-66-RA was 95.4%. And the yield could also be kept above 60% after five cycles of Sonogashira reaction catalyzed. This work offers a new type of superhydrophobic MOFs, the multifunctional MOFs has the potential for environmentally benign catalysis and purification of wastewater.
摘要：
Constructing stable interface to optimize the synergistic effect of active nanoparticles and substrate is significantly crucial for the design and application of functional materials. Herein, metallic nickel (Ni) was manipulated and rooted into the nitrogen (N) doped hierarchical carbonized poplar wood (PCW) to construct the self- supported catalyst (Ni0.4/NPCW) 0.4 /NPCW) for the high-performance hydrogen evolution reaction (HER) in alkaline electrolyte. Attributing to the abundant hydroxyl groups of natural poplar wood, Ni nanoparticles were in-situ anchored and rooted into N doped PCW to form the tight and stable interface. As expected, the optimal Ni0.4/ 0.4 / NPCW catalyst featured outstanding HER activity and excellent durability in 1.0 M KOH, which the overpotential was only 98 mV to reach the current density of 50 mA cm- 2 , and could deliver high current density of 700 mA cm-- 2 at a lower overpotential of 235 mV. In addition, the overpotential of Ni0.4/NPCW 0.4 /NPCW catalyst was only 4.6% increase after 135 h measurement at 50 mA cm-- 2 in 1.0 M KOH, outperforming that of Ni0.4/NF 0.4 /NF catalyst remarkably with the nickel foam (NF) as substrate (22.7 % decay at 50 mA cm-- 2 for 132 h). Density functional theory (DFT) calculations indicated that Ni-C-N sites in Ni0.4/NPCW 0.4 /NPCW catalyst promoted the adsorption and dissociation of water molecular (H2O), 2 O), and increased the free energy (Delta GH*) Delta G H* ) to close to 0 eV, then enhanced the HER activity remarkably. This work provided a spark for the facile synthesis of non-noble catalysts in carbonized wood for the efficient HER in alkaline electrolyte.
期刊：
International Journal of Biological Macromolecules,2024年277(Pt 1):134177 ISSN：0141-8130
通讯作者：
Li, Zhaoshuang;Wu, YQ
作者机构：
[Li, Zhaoshuang; Li, Xingong; Wu, Yiqiang; Hu, Yinchun; Yang, Guoen; Li, ZS; Bao, Zhenyang; Qing, Yan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Wei, Renzhong] Treezo New Mat Sci & Technol Grp Co Ltd, Hangzhou 311107, Peoples R China.
通讯机构：
[Li, ZS; Wu, YQ ] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.
关键词：
Organic-inorganic hybrid structure;Rosin acid emulsion;Soy protein adhesive
摘要：
Soy protein adhesives (SPI) exhibit broad prospects in substituting aldehyde-based resin due to the economic and environmental-friendly characteristics, but still face a challenge because of the dissatisfied bonding strength and terrible water resistance. Herein, prompted by organic-inorganic hierarchy, a multifunctional and novel soy protein adhesive (SPI-RAE-TiO2) consisting of rosin acid emulsion (RAE) and TiO2 nanoparticles (TiO2) were proposed. In comparison with original SPI, the dry and wet shear strengths of modified adhesive reached 2.01 and 1.21 MPa, respectively, which were increased by 130 % and 200 %. Furthermore, SPI-6RAE-0.5TiO2 was selected as the best proportion via the method of response surface methodology (RSM). What's more, SPI-6RAE-0.5TiO2 adhesive demonstrated prominent coating performance in both dry and wet surface conditions. Meanwhile, SPI-6RAE-0.5TiO2 adhesive possessed excellent mildew resistance and antibacterial ability with Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), reflecting the antibacterial rates 97.71 % and 98.16 %, respectively. In addition, SPI-6RAE-0.5TiO2 adhesive also exhibited the outstanding green features such as the reduction of formaldehyde pollution and greenhouse effect through Life Cycle Assessment (LCA). Thus, this work provided a novel and functional approach to design multifunctional, superior-property and low-carbon footprint soy protein adhesive.
Soy protein adhesives (SPI) exhibit broad prospects in substituting aldehyde-based resin due to the economic and environmental-friendly characteristics, but still face a challenge because of the dissatisfied bonding strength and terrible water resistance. Herein, prompted by organic-inorganic hierarchy, a multifunctional and novel soy protein adhesive (SPI-RAE-TiO2) consisting of rosin acid emulsion (RAE) and TiO2 nanoparticles (TiO2) were proposed. In comparison with original SPI, the dry and wet shear strengths of modified adhesive reached 2.01 and 1.21 MPa, respectively, which were increased by 130 % and 200 %. Furthermore, SPI-6RAE-0.5TiO2 was selected as the best proportion via the method of response surface methodology (RSM). What's more, SPI-6RAE-0.5TiO2 adhesive demonstrated prominent coating performance in both dry and wet surface conditions. Meanwhile, SPI-6RAE-0.5TiO2 adhesive possessed excellent mildew resistance and antibacterial ability with Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), reflecting the antibacterial rates 97.71 % and 98.16 %, respectively. In addition, SPI-6RAE-0.5TiO2 adhesive also exhibited the outstanding green features such as the reduction of formaldehyde pollution and greenhouse effect through Life Cycle Assessment (LCA). Thus, this work provided a novel and functional approach to design multifunctional, superior-property and low-carbon footprint soy protein adhesive.
摘要：
Heavy metals and tetracycline pollute the environment and endanger human health. This work prepared a multifunctional coconut shell biochar (Ti-XBC) through NaHCO3 activation and TiO2 modification. The modified coconut shell biochar was characterized by various methods. Ti-4BC exhibited excellent removal performance for heavy metals. The maximum adsorption capacity of Ti-4BC on Cd2+, Pb2+, Cr3+, and Cr6+ reached 104.2, 136.8, 101.2, 112.4 mg/g in water. The adsorption of Ti-4BC for four metal ions had a competitive effect in the binary metal system. It also reduced the mobility of four heavy metal ions in soil. Density functional theory (DFT) calculations were employed to explain the mechanism of heavy metal removal. Additionally, the degradation performance and mechanism of Ti-4BC towards tetracycline were investigated. The results indicated that the maximum degradation rate was 99.4%. Overall, this work developed a multifunctional material capable of both removing heavy metals and degrading antibiotics, addressing the issue of single-function in biochar. This provided a novel approach for tackling complex and diverse environmental pollution scenarios.
期刊：
Construction and Building Materials,2024年451:138753 ISSN：0950-0618
通讯作者：
Zhaoshuang Li<&wdkj&>Yiqiang Wu
作者机构：
College of Materials Science and Engineering, Central South University of Forestry & Technology, Changsha 410004, China;Treezo New Material Science & Technology Group Co., Ltd, Hangzhou 311107, China;[Zhenyang Bao; Yinchun Hu; Guoen Yang; Yan Qing; Xingong Li; Chuntao Kuang; Yuanfeng Wei] College of Materials Science and Engineering, Central South University of Forestry & Technology,Changsha 410004,China;[Zhaoshuang Li; Yiqiang Wu] College of Materials Science and Engineering, Central South University of Forestry & Technology,Changsha 410004,China<&wdkj&>Treezo New Material Science & Technology Group Co., Ltd,Hangzhou 311107,China;[Renzhong Wei; Tonghua Ma; Xiaobing Xie] Treezo New Material Science & Technology Group Co., Ltd,Hangzhou 311107,China
通讯机构：
[Zhaoshuang Li; Yiqiang Wu] C;College of Materials Science and Engineering, Central South University of Forestry & Technology, Changsha 410004, China<&wdkj&>Treezo New Material Science & Technology Group Co., Ltd, Hangzhou 311107, China
摘要：
Lithium-sulfur (Li-S) batteries are promising alternatives for the forthcoming generation of power and energy storage batteries due to their remarkable features and advantages. However, the large-scale application of Li-S batteries faces significant challenges posed by the shuttle effect of lithium polysulfides (LiPSs) and sluggish reaction kinetics of sulfur cathode. Herein, a low-priced Fe2O3/CFe15.1/Fe heterostructure was purposefully engineered and distributed within carbonized wood fibers (CWF) by a straightforward hydrothermal and pyrolysis process. The distinctive Fe2O3/CFe15.1/Fe heterostructure concurrently achieves both chemical adsorption and catalytic capability for LiPSs, effectively mitigating the shuttle effect. The optimized Fe2O3/CFe15.1/Fe heterostructure exhibits impressive electrochemical performance with a high initial capacity of 1174.7 mA h g-1 at 0.1 C, an outstanding rate capacity of 687.4 mA h g-1 at 2.0 C, and a remarkable cycling stability, maintaining a notable capacity of 513.6 mA h g-1 after 1000 cycles at 1.0 C. This work presents a viable strategy of a multifunctional Fe2O3/CFe15.1/Fe heterostructure to capture and expedite the transformation of LiPSs, realizing exceptional electrochemical performance.
通讯机构：
[Wu, YQ; Tian, CH; Qing, Y ] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
carbon nanotube encapsulating;efficiency and durability;Fe doping;hierarchical wood substrate;high current density
摘要：
Precise morphology design and electronic structure regulation are critically significant to promote catalytic activity and stability for electrochemical hydrogen production at high current density. Herein, the carbon nanotube (CNT) encapsulated Fe-doped NiCoP nanoparticles is in-situ grown in hierarchical carbonized wood (NCF0.5P@CNT/CW) for water splitting. Coupling merits of porous carbonized wood (CW) substrate, CNT encapsulating and Fe doping, the NCF0.5P@CNT/CW features remarkable and durable electrocatalytic activity. The overpotentials of NCF0.5P@CNT/CW at 50 mA cm-2 mV and 205 mV for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) and features high current density of 800 mA cm-2 within 300 mV for both OER and HER. Moreover, NCF0.5P@CNT/CW displays outstanding overall water splitting performance (eta 50 = 1.62 V and eta 100 = 1.67 V), outperforming Pt/CRuO2 (eta 50 = 1.74 V), and can achieve the current density of 700 mA cm-2 at a lower cell voltage of 1.78 V. Overpotential is only 4.0 % decay after 120 h measurement at 50 mA cm-2. Density functional theory (DFT) calculations reveals Fe doping optimizes the binding energy and Gibbs free energy of intermediates, and regulates d-band center of NCF0.5P@CNT/CW. Such synergistic strategy of morphology manipulation and electronic structure optimization provides a spark for developing effective and robust bifunctional catalysts. The synergistic strategy of morphology manipulation and electronic structure optimization by encapsulating Fe-doped NiCoP into carbon nanotube (CNT) and in situ growing in hierarchical carbonized wood (CW) is employed to fabricate NCF0.5P@CNT/CW catalyst. The NCF0.5P@CNT/CW presents remarkable and durable performance for oxygen evolution reaction (OER), hydrogen evolution reaction (HER) and overall water splitting, which provides an avenue for the electrochemical hydrogen production at high current density.image
摘要：
Wood, a flammable material, poses safety risks due to heat and smoke release during combustion and is a huge safety hazard. The current approach involves impregnating water-soluble inorganic flame retardants into wood. However, these retardants are susceptible to leaching, negatively impacting the aesthetic appearance and flame retardancy of wood. Herein, a liquid mix of ammonium dihydrogen phosphate, boric acid, and magnesium chloride was vacuum-pressure impregnated into wood. Subsequent concentration and drying produced composite salt particles (named as P-B-Mg). The wood was immersed in sodium silicate solutions of different concentrations. Mg2+ leached from P-B-Mg rapidly combined with SiO32- to precipitate an MgSiO3 layer on the particle surfaces. This in-situ synthesis resulted in P-B-Mg@MgSiO3 hybrid flame retardant with core-shell structure within wood cells. The modified wood displayed superior performance, achieving non-combustible level in limiting oxygen index test and remaining self-extinguishing even after continuous exposure to open flame at 1100 degrees C for 205 s. Compared with that of untreated wood, the total heat release and total smoke production of the P-B-Mg@40%MgSiO3-modified wood decreased by 94.7 and 86.5 %, respectively. Residual char and pyrolysis analysis showed that the flame retarded process of modified wood involved gas, liquid and solid phase synergy effects. Meanwhile, the modified wood exhibited excellent resistance to leaching, durable flame retardancy, smoke suppression after 14-d water immersion cycles. Furthermore, it displayed good anti-degradation properties with pH value close to that of untreated wood. Thus, the modified wood possesses stable material properties suitable for long-term use in both indoor and outdoor applications.
作者：
Ming Ni;Lei Li;Yiqiang Wu;Jianzheng Qiao;Yan Qing;...
期刊：
Journal of Renewable Materials,2024年12(8):1355-1368 ISSN：2164-6325
作者机构：
College of Materials Science and Engineering, Central South University of Forestry and Technology , Changsha, 410004 , China;College of Furniture and Art Design, Central South University of Forestry and Technology , Changsha, 410004 , China;[Ming Ni; Lei Li; Yiqiang Wu; Jianzheng Qiao; Yan Qing; Ping Li; Yingfeng Zuo] College of Materials Science and Engineering, Central South University of Forestry and Technology , Changsha, 410004 , China<&wdkj&>College of Furniture and Art Design, Central South University of Forestry and Technology , Changsha, 410004 , China
期刊：
Industrial Crops and Products,2024年209:117944 ISSN：0926-6690
通讯作者：
Li, GY
作者机构：
[Chen, Yuan; Guo, Dengkang; Zhang, Yiyuan; Li, Gaiyun; Li, GY] Chinese Acad Forestry, Res Inst Wood Ind, 1 Dongxiaofu Xiangshan Rd, Beijing 100091, Peoples R China.;[Cao, Yuan] Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China.;[Wu, Yiqiang; Qing, Yan] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Li, GY ] C;Chinese Acad Forestry, Res Inst Wood Ind, 1 Dongxiaofu Xiangshan Rd, Beijing 100091, Peoples R China.
关键词：
Bio-composites;Self-bonding;Particle size high strength;Eco-friendly
摘要：
Green and low-carbon bio-composites from wood fibers are in great demand in the further due to the global sustainable development. In this work, we successfully manufactured the fully bio-composites with excellent mechanical properties and improved water resistance using the dialdehyde wood fibers as the “glue” and untreated poplar wood fibers with lower particle size. The high reactive aldehyde groups provided internal chemical connection between fiber compositions and uniform size offered tightly connected structure and physical winding, which were synergistically contributed to superior performances of self-bonding bio-composites. The self-adhesive bio-composites owned outstanding flexural strength (105.2 MPa), tensile strength (35.6 MPa), internal bond strength (5.1 MPa), and hardness (0.3 GPa), better than most of the reported non-adhesive biomass materials. An innovative hydrobromic acid destruction method was used to prove the self-assembly mechanism and contributions. Both of the direct characterization and reverse destruction illustrated the covalent and hydrogen bond synergistic self-adhesive contribution of dialdehyde oxidation and homogenization. The self-bonding bio-composites have the potential to be applied to high strength outdoor household materials and structural buildings, which corresponds with the notions of carbon storage, eco-friendly, and degradation.
