Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Jinhui Wang,Ruisong Wang,Xiaoxiao Ji,Chunde Jin,Yutao Yan
Phenol formaldehyde (PF) resin adhesives are widely used in the production of bamboo-based composites owing to their excellent bonding strength and durability. However, the inherent brittleness of cured PF resin may result in notable stress concentration at the interface between PF resin and bamboo bonding, leading to the generation of cracks. In this study, a hyperbranched compound polyethyleneimine (PEI) with high reaction activity was incorporated into a PF resin adhesive to toughen the adhesive and the bonding interface. And the effects of PEI incorporation on the properties of the adhesive and the bonding performance between PF resin and bamboo were comprehensively investigated. The results showed that introduction of flexible PEI chains could effectively facilitated stress transfer, avoiding stress concentration, thus enabling efficient energy release and play a toughening effect. In addition, PEI could react with PF resin and bamboo components during hot pressing, forming a three-dimensional network structure and enhancing the bonding interface, which was proved by FT-IR and XPS analysis. When 1 wt% PEI was incorporated, the bending strength and Charpy impact toughness of the modified PF resin was significantly increased by 38.88% and 76.02%, respectively, compared with the pure PF resin. While the dry and wet shear strength of the bamboo composite bonded by the PEI modified PF resin were also obviously increased. This study is expected to address the problem of cracking in the bonding interface of bamboo composite, and endow the composites with high strength and durability, which can prolong its service life and contribute to the healthy and sustainable development of the bamboo industry.
研究领域:
材料科学
·
木材科学与技术
·
高分子化学
·
复合材料工程
·
胶接与界面科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Weiyu Zhao,Qilei Zhao,Shuo Ren,Bojun Zou,Mengqi Chen,Zeyu Ren,Dongming Song,Yanchun Li,Dazhi Liu
By exploiting the immiscible nature of the aluminum–bismuth (Al Bi) binary system, spherical AlBi10 alloy particles with a unique particle-embedded network structure were successfully synthesized using a high-speed disc-shaped centrifugal atomization method. In this structure, nanoscale Bi particles are embedded within a micrometer-scale Al matrix, forming a continuous network that subdivides the Al grains into nanocrystalline domains along grain boundaries. The embedded Bi particles, undergo micro-explosions during combustion, promoting the dispersion and rapid reaction of the Al particles. In terms of thermal behavior, the oxidation exothermic peak of the AlBi10 alloy occurs at 1000.7 °C, which is 16 °C lower than that of pure Al. The oxidation weight gain reaches 64.03 wt%, representing 7.02 times that of pure Al. Combustion performance tests revealed that the AlBi10 alloy–KP–PF sample exhibits excellent reactivity. Under ambient air, complete combustion is achieved within 3.0 s, with an average burning rate of 2.93 mm/s. Under confined conditions, the peak pressure reaches 7.52 MPa, and the pressure rise rates increases to 67.02 MPa/s. These results demonstrate that the AlBi10 alloy particles, owing to their distinctive structure, exhibit significantly enhanced reactivity and combustion efficiency compared to micrometer-sized Al particles. Therefore, AlBi10 alloy particles show great promise for applications in energetic materials.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 48
·40478-40490
·
IF 4.6
Qisong Feng,Junjun Ma,Yankun Shen,Zheng Zhou,Shilian Wu,Juan Wang,Junpeng Li,Yu Yang
Flexible printed electronics represent a swift, efficient, and cost-effective technique for depositing metallic conductive materials onto flexible substrates, particularly with the pivotal advancement of functional conductive inks. Metal–organic decomposition conductive inks have garnered substantial interest owing to their straightforward synthesis, convenient storage, and low processing temperatures. However, during low-temperature heating, these inks frequently encounter issues such as fast pyrolysis and gas escape, leading to numerous defects in the microstructure of silver films. Moreover, low silver content results in a high volumetric shrinkage rate, negatively impacting electrical conductivity. To address these limitations, this study synthesized four distinct silver precursors and conducted an in-depth analysis of their chemical compositions, thermal behaviors, and microscopic morphologies. Conductive inks were developed with a high silver content using silver citrate as the silver source with gradient thermal volatilization and low-temperature reduction properties. The impact of solvents and complexing agents on the performance of ink formulations was then examined. Furthermore, the evolution of the inks' microstructure was investigated during thermal decomposition along with the influence of the microscopic morphology on electrical conductivity. Finally, the thermal decomposition mechanism was elucidated in detail. By introducing organic solvents with varying boiling points, the intensity of thermal decomposition was effectively reduced, thereby minimizing the appearance of surface defects such as bubble holes and sintering marks. This strategy significantly enhanced the density of the silver film, reduced its surface roughness, and improved its electrical conductivity.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Haozhang Hou,Zexu Sun,Yi Ru,Chunling Zhao,Yuan Liu,Guangying Lin,Lianyi Wang,Shusuo Li,Shengkai Gong
The free silicon content in silicon melt infiltrated ceramic matrix composites (CMC) causes the GPa-range residual microstress in silicon and SiC phases and the MPa-range average residual matrix stress in the Si-SiC matrix. These residual stresses are naturally linked to the matrix cracking stress. The complex effect of free silicon on the matrix cracking behavior in SiC fiber reinforced cross-ply laminate CMCs has been investigated by experiment and thermoelastic analysis. The CMC with the lowest silicon exhibits the highest onset cracking stress. A proposed thermoelastic model, which includes silicon crystallization expansion, reveals that the Si-SiC matrix fracture energy in the low-silicon CMC is nearly doubled due to suppressed elastic potential energy associated with the GPa-range microstresses. This improved fracture energy overturns the effect of matrix residual stress and becomes the dominant factor in determining cracking stress. These results offer an energy-based guideline for improving onset cracking stress.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Jian Gu,Wentian Cui,Hongzhi Cheng,Didi Cao,Jian Yang,Junyang Jin,Lin Zhao,Hongkang Wei,Meiling Yu,Zhipeng Xie,Chang-an Wang
In this study, transition metal halides and phenolic resin were utilized to synthesize (TiHfVNb)C medium-entropy precursors by multi-metal organic frameworks (MOFs) method. The (TiHfVNb)C submicron particles were obtained by carbothermal reduction at a relatively low temperature (1500 °C) and subsequently consolidated into medium-entropy carbide ceramics via spark plasma sintering at 1950 °C. Effects of molar ratios of transition metal halides and phenolic resin, pyrolysis temperatures and holding time on the properties of MOFs-derived (TiHfVNb)C submicron particles was systematically investigated. Comprehensive characterization was performed on the as-synthesized submicron particles using FTIR, TGA, XRD, SEM, EDS and TEM, revealing that the as-synthesized submicron particles exhibited an elliptical morphology with fine particles size (~150 nm) and uniform particle size and elemental distribution. The MOFs-derived (TiHfVNb)C ceramic by SPS achieved a high density of 99.6% and displayed homogeneous microstructure. Remarkably, the SPS-sintered (TiHfVNb)C ceramics demonstrated competitive mechanical properties, with Vickers hardness and fracture toughness values reaching 21.7 GPa and 4.4 MPa·m¹ / ², respectively.
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 8
·e05387
·
IF 2.3
Zijiao Guo,Fankai Lin,Xianjie Liu,Mingyong Liu,Yue'na Jiang,Zhaohui Huang,Xin Min
As research on phase change materials advances for solar energy applications, composite PCMs face growing demands for enhanced thermal conductivity, mechanical strength, and heat transfer efficiency. In this work, a porous carbon skeleton derived from phenolic resin offers over 1 MPa compressive strength and high-temperature stability. After impregnation with polyethylene glycol, the resulting composite phase change material exhibits a thermal conductivity of 0.79 W/(m·K), four times that of pure PEG, together with good thermal stability and 66.2% photothermal conversion efficiency. Graphical
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.3
Bin Wen,Ruyin Ma,Jianbin Chen,Zhou Sha,Jiahao Feizheng,Daliang Guo,Linxin Zhong,Qianyu Sun,Yinchao Xu,Ziyang Chang,Chengliang Duan,Jing Li,Xin Tong
As the critical gas diffusion layer in proton exchange membrane fuel cells (PEMFCs), carbon paper (CP) governs the charge transfer, mechanical integrity, and gas/water transport. However, conventional CP struggles to simultaneously optimize permeability, strength, and conductivity, hindered by structural defects from resin expansion and weakened fiber-resin bonds during fabrication. To overcome this, a novel synergistic modifier: aramid nanofibers (ANF) and cellulose nanofibers grafted with methyl methacrylate (CNFM) within the phenolic resin (PF) were used to prepare CP. Investigating ANF:CNFM ratios revealed enhanced PF dispersion stability and modified thermochemical properties. The modified CP exhibited a tunable surface morphology, mechanical strength, in-plane resistivity, and pore characteristics, peaking at ANF:CNFM (3:1). Crucially, this modification inhibited PF methylene bridge fracture, increased polycondensation sites, and fostered a more ordered carbon matrix (reduced ID/IG: 2.12 vs 2.16 unmodified). Assembled PEMFCs with optimized ANF:CNFM (3:1) modified CP achieved a peak power density of 1.34 W·cm–2 (2 N·m, 60 °C anode humidification), surpassing commercial CP by 15.51% (1.16 W·cm–2). Lower mass transport impedance, confirmed by EIS, underscores the superior gas–liquid transport enabled by a tailored pore structure and enhanced mechanical strength, advancing high-performance PEMFCs design.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2026
·
IF 6.2
Guangshuai Zhao,Ling Zhan,Yangmei Chen,Yi Ling,Dalin Li,Xiaolin Luo,Jing Liu
Wood-based panels like plywood alleviate the rapidly-growing global demand for timber, yet their production remains highly dependent on fossil-derived adhesives (e.g., urea-formaldehyde and phenol-formaldehyde resins) that impose considerable environmental and ecological concerns. As such, various renewable macromolecules such as lignin, starch, proteins, and hemicelluloses have been developed as bio-adhesives. However, the structural variability of these biomacromolecules, influenced by plant source and isolation methods, often leads to inconsistent adhesive performance during industrial scale-up. While adhesives synthesized from biomass-derived monomers can ensure better batch-to-batch uniformity, conventional refining systems (e.g., acidic and alkaline aqueous systems) still suffer from low efficiencies in isolating biomacromolecules from lignocelluloses and converting biomacromolecules into platform monomers (e.g., monosaccharides and furanics). Based on diformylxylose (DFX), a by-product derived from the acetal-protected lignocellulosic refining process, we herein report a novel DFX-derived bio-adhesive. This adhesive is prepared through two-step acid-catalyzed pre-reactions, i.e., pre-reaction I and II, followed by blending with a small amount of defatted soybean flour (DSF). After hot-pressing, it achieves both dry and wet bonding strengths of 1.4 MPa, significantly exceeding those of urea-formaldehyde resin as well as other sugar- (e.g., sucrose, starch and hemicelluloses) and protein-based (e.g., DSF) bio-adhesives. Additionally, residual formaldehyde molecules of pre-reaction I can be effectively captured by urea and additive (melamine or polyvinyl alcohol) in pre-reaction II, reducing the formaldehyde emission of three-layer plywood to as low as 0.58 mg/L. Characterizations indicate that the furanic prepolymers derived from pre-reaction I can undergo further covalent and non-covalent (e.g., hydrogen) cross-linking with additive (polyamine, or polyol) and DSF during pre-reaction II and hot-pressing, enhancing the cohesion and interfacial adhesion of DFX-derived bio-adhesives.
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2026
·
IF 7.6
Chen Lin,Wenrui Liang,Chenyu Liu,Jinlong Huang,Yaowei He,Jiabin Lu
To address the low material removal rate (MRR) and low abrasive utilization of free abrasives as well as severe surface damage in fixed abrasive polishing, this paper proposes a pore-confined free abrasive (PC-FA) polishing disc based on Diamond@phenol-formaldehyde resin (PFR) composite abrasives for single-crystal SiC. In ethanol slurry, the PFR shell of composite abrasives dissolves selectively, confining the inner diamond cores within in-situ generated pores to act as dynamic free abrasives for high-quality, low-damage precision machining. Diamond@PFR abrasives were synthesized by solution suspension and characterized via SEM, XRD and LPSA. Three polishing discs (fixed diamond, fixed composite, PC-FA) were fabricated for comparative polishing tests. The PC-FA polishing disc achieved an MRR of 1.07 μm·h −1 and an Sa of 1.38 nm, reduced the surface roughness by 54.6% and 48.1% compared with the two fixed abrasive polishing discs. ABAQUS simulations combined with friction tests clarify the removal mechanism. Fixed abrasives bear rigid constraints, causing concentrated contact stress, deep straight scratches and two-body wear. Pore-confined diamonds move randomly with multiple degrees of freedom, thereby homogenizing stress and generating shallow and sparse scratches, as reflected by a reduced Rku value and an elevated Rsm value, with flexible three-body wear dominating material removal. This disc realizes in-situ fixed-to-free abrasive transition, achieving moderate material removal with high-quality and low-damage machining, and offers a new route for processing third-generation semiconductor substrates.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Fei Chai,Haoran Chen,Hongrui Xiang,Feiping Zhao,Qingwei Wang,Xiaobo Min,Liyuan Chai
Selective separation of precious metals from chloride-rich acidic media remains challenging because of the complex aqueous speciation of metal ions and the interference of competing ions. In this study, a polyethyleneimine (PEI)-functionalized tannin-based phenolic resin (TPR@PEI), enriched with O/N binding sites, was synthesized via Schiff base reactions for the selective separation and recovery of Au(III) and Pd(II) from complex acidic chloride solutions. The effects of key synthesis parameters, including tannic acid (TA) dosage, formaldehyde (FA) volume and crosslinking time, on adsorbent structure and Au(III)/Pd(II) adsorption performance were systematically investigated. Under the optimized synthesis conditions (1 g TA, 5 mL FA, and 2 h crosslinking time), TPR@PEI exhibited rapid adsorption kinetics, reaching equilibrium within 40 min for both metal ions. The adsorption behavior was well described by the pseudo-second-order kinetic model and the Langmuir isotherm model, with maximum adsorption capacities of 416.67 mg g −1 for Au(III) and 270.27 mg g −1 for Pd(II) at pH 2. More importantly, TPR@PEI showed superior selectivity toward Au(III) (> 99%) and Pd(II) (> 87%) in both binary and multicomponent systems, and maintained removal efficiencies remaining above 90% over five adsorption-desorption cycles. Combined characterization and density functional theory calculations (DFT) revealed that the excellent separation performance was governed by the synergistic effects of electrostatic attraction, redox interaction, and coordination/chelation enabled by the cooperative O/N-rich binding sites. These results demonstrate that TPR@PEI is a promising adsorbent for the highly selective separation and recovery of precious metals from complex chloride-rich acidic solutions.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jing Liu,Yuanyuan Zhou,Yangmei Chen,Yi Ling,Ling Zhan,Fuxiang Chu,Li Shuai,Xiaolin Luo
L-cysteine-protected lignin (CPL) is isolated from biomass in aqueous formic acid. • CPL adhesive achieves a record wet bonding strength of 1.48 MPa. • Multi-layer plywoods bonded with this adhesive exhibit practical viability. • Physicochemical crosslinking enables robust adhesion at the bonding interface. To alleviate the dependence of commercial adhesives (e.g., phenol-formaldehyde and urea-formaldehyde resins) on fossil resources, substantial research efforts have focused on developing lignin-phenol-formaldehyde (LPF) resins. Owing to the low reactivity of condensed technical lignins (e.g., kraft and organosolv lignins), LPF resins continue to suffer from structural heterogeneity, inferior bonding performance, limited phenol substitution rate, and formaldehyde emissions. Given that lignin functions as a natural binder to endow higher plants with structural rigidity and water resistance, extracting native-like lignin from lignocellulosic biomass therefore offers a promising route towards fully bio-based alternatives. However, simultaneously achieving green lignin extraction and practical bonding performance of the resulting adhesives remains elusive. Here we report an effective strategy to overcome this trade-off. Our approach involves protecting lignin with L-cysteine in an aqueous formic acid system during biomass fractionation, followed by simply dispersing the resulting L-cysteine-protected lignin (CPL) in water. Among fossil-free all-lignin adhesives, the resulting CPL adhesive achieves a record wet bonding strength of 1.48 MPa and an exceptional dry bonding strength of 1.85 MPa. Multi-layer plywoods that bonded with this adhesive also exhibit superior flexural resistance, long-term stability, and negligible formaldehyde emissions. Mechanistically, L-cysteine forms C–S bonds at the α-positions of lignin during fractionation, which controls the initial molecular weight of CPL via inhibiting condensation reactions, and preserves its active linkages (e.g., aryl ether bonds) and functional groups (e.g., hydroxyl and carboxyl groups). These structural features facilitate the penetration, in situ depolymerization and condensation of lignin, as well as non-covalent interactions during hot pressing, thereby enabling the high-performance adhesion of CPL adhesive towards wood veneers. Download: Download high-res image (153KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Jing Ma,Chun Wang,Wei Wei,Guotong Qin,Chaojie Jing,Shaomin Liu,Lei Jiang
Nanofiltration membranes are efficient for desalination but are limited by concentration polarization. We report an integrated electrochemical reactor comprising a tubular nanoporous carbon membrane (CM) and an internal activated carbon packed bed reactor (PBR) that simultaneously achieves co-ion exclusion and counter-ion electrosorption under a single applied cathodic potential. The system achieves Na 2 SO 4 rejection above 99% at an inlet concentration of 500 mg L −1 under −0.4 V vs. SCE, and maintains rejection above 90% over 30 charge-discharge cycles. The 5.6 nm pore geometry of the CM concentrates the local electric field at the pore entrance, imposing strong Donnan repulsion against co-ions (SO 4 2− , Cl − ). The same cathodic field activates electrosorption of counter-ions (Na + , Ca 2+ ) across both the CM pore wall and the PBR, where the high specific surface area of activated carbon provides abundant adsorption sites. The integrated tubular configuration ensures that anions and cations are simultaneously removed within a single cathodic compartment. Finite element analysis confirms that SO 4 2− rejection is completed within 1.5 nm of the channel entrance, while Na + electrosorption extends across the CM pore wall. This dual-mechanism strategy under a single electric field offers a scalable platform.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）