bluuebunny/crossref_metadata_2025_split huggingface dataset:
Positive changes in the mechanical and optical properties of the floor epoxy reinforced with green graphene
Authors: Samanta Moumita , Verma Anu , Singh Himanshu , Katiyar Nirmal Kumar , Bandyopadhyay Rupam , Das Bidus Kanti , Tiwary Chandra Sekhar , Bhattacharya Jayanta 
Published: July 2024

AbstractSilica‐rich Green Graphene® (GG) derived from agricultural residue is incorporated into a floor epoxy (FEP) matrix. The inclusion of GG particles within the FEP matrix has demonstrated a significant positive impact, resulting in improved optical and mechanical properties and increased durability of the floor coatings. The addition of GG into the original FEP reduces surface pores, with the glazier appearance of the composite coating attributed to a smooth surface enhancing light reflection. It is noteworthy that the FEP exhibits a high coefficient of friction (CoF), thereby constraining its potential in tribo‐logical applications. Nano‐indentation and tribo‐logical tests confirm that, incorporation of the 0.5 wt% GG in the FEP matrix results in a 130.15% improvement in hardness, a 10.45% decrease of nano‐scratch depth, a 34.55% decrease in wear rate, and a 33.33% decrease in CoF w.r.t pristine FEP sample. Tensile testing reveals a significant 37% enhancement in fracture strain, along with improvements of 12.3% in specific flexural strength and 43% in energy absorption. The utilization of GG derived from green processes, such as pyrolysis of residual agro‐biomass, presents an environmentally conscious alternative to conventional polluting as well as nonrenewable materials employed in epoxy‐based floor coatings.Highlights
Green graphene/floor epoxy (GG/FEP) composites present a glazier appearance attributed to a smooth surface enhancing light reflection.
GG particles enhance the hardness and tribo‐logical performance of the composite.
GG/FEP composites show a synergistic enhancement in flexural strength.
GG presents a sustainable and economically viable material for the epoxy‐based flooring industry.
Stiffness prediction method and load sharing mechanism of hybrid interference‐fit bolted‐bonded composite joint
Authors: Zou Peng , Yang Junchao , Chen Xiangming 
Published: July 2024

AbstractHybrid interference‐fit bolted‐bonded (HIBB) composite joint has a wide application prospect in improving bearing capacity of the hybrid structure. In order to deeply understand its load sharing mechanism, an analytical stiffness prediction model of HIBB composite joint was established, considering the influence of interference‐fit percentage, preload, friction coefficient, adhesive property, material performance, secondary bending moment and other parameters. Corresponding experiments were carried out to determine the experimental secondary bending moment coefficient, and the accuracy of the model was further verified. Research on HIBB composite joint shows that the hybrid form increases the adhesive failure displacement but has no effect on failure load. Before adhesive failure occurs, bolted joint stiffness is small and bolt load will increase suddenly to bear the load loss caused by the adhesive failure. It is further found that load‐sharing ratio of the bolt and total load of the structure increase with the increase of interference when adhesive failure occurs. Preload and friction coefficient have limited influence on total load of the structure at this moment, but have great influence on the bearing capacity of pure bolted structure after adhesive failure. The adhesive properties have great influence on the bearing capacity of bonded joint. Low modulus high strength adhesive can improve the load‐sharing ratio of bolt and enhance the bearing capacity by reducing the overall stiffness of the structure. Bearing mechanism of the two joint forms in the hybrid one was fully revealed, which provides a theoretical method for the application of HIBB composite joint.Highlights
An analytical stiffness prediction model of HIBB composite joint was established to deeply understand its load sharing mechanism.
Load sharing mechanism analysis and parametric research for the two joint forms were carried out and influences on stiffness were obtained.
Low modulus high strength adhesive can improve the load‐sharing ratio of bolt by reducing the overall structure stiffness.
Bearing mechanism of the two joint forms in the hybrid one was revealed.
Effect of layer design on the structural strength of 70 MPa Type IV hydrogen storage vessels
Authors: Guo Wei , Han Canfei , Zhao Feng , Zhao Jialong , Feng Tao , Liu Lian , Huang Huayao 
Published: July 2024

AbstractIn this study, under the conformity of engineering reality, considering the influence of slip coefficient on the variation range of winding angle, 15 composite lay‐up schemes of hydrogen storage vessels were designed using grid theory, and the hydrogen storage vessels's structural strength was analyzed. The distribution of non‐geodesic fiber windings on the outer surface of the inner layer was solved using differential theory and the winding principle, and ABAQUS established the finite element model. The maximum stress value and stress distribution of the composite layer of the hydrogen storage vessel along the fiber direction were studied, the damage of the composite layer was analyzed, and the pressure and mode of the bursting were predicted. Results show that the structural strength of the hydrogen storage vessel designed by this method can be effectively guaranteed. The hoop winding layer bears the majority of the stress on the hydrogen storage vessel, while the helical winding layer's fiber strength is not entirely utilized. The hydrogen storage vessel gains greater structural strength when the circumferential winding layer is concentrated and situated at the outermost portion of the composite layer. The layup scheme has an impact of approximately 17.21% on burst pressure.Highlights
Effect of slip coefficient on the change of winding angle.
Different forms of composite lay‐up schemes were designed.
The stress distribution in the composite layer was studied.
Analyzed structural strength and damage of the composite layer.
Predicted the pressure and mode of bursting.
Thermoplastic bicomponent‐fibers for organosheets via inline polymerization
Authors: Senneka Lea , Haag Markus , Lüking Alexander , Wedegärtner David , Gries Thomas , Strube Oliver I. 
Published: July 2024

AbstractState‐of‐the‐art organosheets suffer from several shortcomings that limit their applicability in high‐performance materials, mainly due to the imperfect combination of glass fibers and polymer. To overcome these issues, a novel hybrid fiber is presented, in which every single filament consists of a glass core and an individual, thin, thermoplastic polymer coating. Those fibers can immediately be consolidated into organosheets, without the necessity of the critical combination step. Production is realized by an ultra‐rapid inline coating of the filaments, incorporated into a standard spinning system. This solvent‐free process is realized by coating of the fibers with a tailor‐made, monomeric precursor solution, which is radiation‐polymerized immediately after application. Within fractions of a second, the coating layer is thus solidified, before coiling of the hybrid fiber. Due to the very low thickness of the coating and specific formulation of the precursor, tackless layers can be achieved before the coiling, even at industrial spinning speeds.Highlights
Glass fibers are coated with a thermoplast via in situ polymerization.
A precursor is developed which polymerizes in 100 ms.
Glass fibers are coated completely with thermoplast by using a UV tunnel.
Spinning velocities of about 600 m/min can be achieved.
Hybrid fibers are consolidated into glass fiber‐reinforced plastics (GFRP).
Material extrusion‐based additive manufacturing of sandwiched acrylonitrile butadiene styrene/glass fibers composites: Machine learning approach to model tensile stress
Authors: Kumar Mohit , Kumar Raman , Kumar Ranvijay 
Published: July 2024

AbstractAdditive manufacturing (AM), also recognized as 3D printing, has gained significant attention in various industries for its potential to revolutionize production processes. One critical aspect of AM is ensuring the quality and performance of printed parts, particularly concerning mechanical properties like tensile stress. In the present work, the effect of process variables on 3D‐printed acrylonitrile butadiene styrene (ABS)/Glass fiber composite materials was explored. The machine learning approach, classification and regression trees (CART) algorithm, was used to predict tensile stress in ABS/Glass fiber composite materials based on predictor variables such as layer thickness, nozzle temperature, bed temperature, and infill density. The objective is to develop an accurate and interpretable model that captures the relationships between these variables and tensile stress. The model is evaluated using performance metrics such as R‐squared, mean absolute deviation (MAD), and root mean squared error (RMSE) on both training and test datasets. From results the highest tensile stress of 39 MPa was achieved at nozzle temperature of 250°C, bed temperature of 80°C and infill density at 60%. The CART model predicts the most influencing parameter as infill density followed by nozzle temperature and bed temperature.Highlights
Novel material is manufactured by sandwiching glass fiber in ABS layers.
FDM process for novel material is optimized based upon process parameters.
SEM analysis reported good interlayer adhesion with few micro‐porosities.
Modeling of tensile stress by classification and regression tree algorithm.
CART model predicts significant impact of infill density on tensile stress.
An atom economy polyamide elastomer derived from polyether amine‐based bis‐acrylamide and dithiol monomer and synthesized by thiol‐Michael addition click reaction
Authors: Zhu Jun , Zhu Shi‐hu , Sun Ai‐ling , Chang Chun , Wei Liu‐he , Li Yu‐han 
Published: July 2024

AbstractTraditional polyamide elastomer synthesis via polycondensation of diamines and dicarboxylic acids involves high energy use and by‐product mass loss. Here, we present a novel method using thiol‐Michael addition click chemistry to produce these elastomers under mild conditions, marking the first use of this strategy. The polymerization involves coupling bis‐acrylamide (BAA) with 3,6‐dioxa‐1,8‐octanedithiol (DODT), catalyzed by 1,5‐diazabicyclo[4.3.0]non‐5‐ene (DBN). BAA is synthesized from polyetheramine and acryloyl chloride, creating a compound with amide groups and carbon double bonds at chain ends. These double bonds' electron‐withdrawing effect facilitates the click reaction efficiently, avoiding high energy and mass loss. The resulting polymers have a molecular weight of approximately 10,000 g/mol, verified by 1H NMR and FTIR spectroscopy, which show amide group presence. SAXS and AFM confirm nanophase separation of these groups. Tensile strength ranges from 0.235 to 0.542 MPa, decreasing with lower polyetheramine content but still showing notable elasticity. This method's low energy use, no mass loss, and good mechanical properties make it promising for developing high‐performance polyamide plastics and elastomers, appealing to researchers in both academia and industry.Highlights
High elasticity, softness, and high tensile polyamide elastomer.
Thiol‐Michael addition click reaction conforms to atomic economy.
Long molecular chain contains extraordinary evolution of hydrogen bonding.
A novel approach to managing facility airborne diseases: suppressing air pathogens with smoke aerosols generated from fungicide phase transition
Authors: Gao Haojie , Liu Fengqi , Han Chong , Liu Xiaochi , Zhou Li , Zhang Jingzhi , Wang Ranran , Zou Nan , Zhang Daxia , Mu Wei , Zhang Yaozhong , Liu Feng 
Published: July 2024

AbstractBACKGROUNDEnvironmental microorganisms are major contributors to the development and spread of disease. Chemical disinfection can inhibit pathogens and play a preventive role against diseases. In agriculture, prolonging the floating time of chemical pesticides in the air has a positive effect on the control of airborne diseases. However, the interaction of chemical pesticides with airborne pathogens is not yet known.RESULTSHere, triazole fungicide was transformed into stable smoke aerosols in order to assess the feasibility of employing phase transition release pesticides for air disinfection. The phase transition had a minimal impact on hexaconazole (Hexa) and myclobutanil (Mycl), with their smoke formation rates remaining consistently >90%. In microscopic morphology, triadimenol (Tria) and epoxiconazole (Epox) are solid, and tebuconazole (Tebu), Hexa, Mycl and difenoconazole (Dife) are liquid. Liquid smoke has advantages over solid smoke in the inhibition of environmental pathogens. The floatability and spatial distribution of fungicide aerosol were optimized by the combination of smoke particles with different properties, so that the fungicide aerosol could meet the conditions of practical application. In practical applications, smoke exhibits a gentler deposition process at the target interface compared to spray, along with a more homogeneous distribution of fungicides. Moreover, fungicide smoke demonstrates superior control efficacy and leaves behind lower residual amounts on fruit.CONCLUSIONIn conclusion, the implementation of fungicide phase transition as a smoke aerosol offers a viable approach to effectively suppress pathogen aerosols and enhance the control of airborne diseases. © 2024 Society of Chemical Industry.
Triggering and Modulation of Quantum Magnon‐Photon Hall Insulator in a 1D Cavity Magnonics Lattice
Authors: Xiang Lü , Wang He , Li Zi‐Meng , Zhang Zhu‐Cheng , Wang Yi‐Ping 
Published: July 2024

AbstractQuantum Hall insulators in artificial systems have become a rapidly developing research field in recent years, and have made significant breakthroughs in observing many novel topological phenomena. However, there are few reports about quantum magnon‐photon Hall insulators. Here, a scheme is proposed for implementing a 1D cavity magnonics lattice that exhibits quantum magnon‐photon Hall insulator behaviors, where each unit cell comprises cavity photons and magnons. By adjusting the system parameters, it is found that not only different energy spectrum structures can be triggered, but also the distribution of the edge states can show the flipping process, which allows the achievement of the multi‐channel topological quantum state transmission. In addition, considering the presence of defects, dissipation, and disorder, it is found that appropriate defects can trigger new topological phases, while dissipation only causes shifts in energy levels without changing the position and period of edge states, and disorder leads to shifts in band structures and edge states, thus demonstrating the robustness of edge states. This work offers an effective way to study topological magnon‐photon Hall insulators, which will have promising applications in magnon‐based quantum information processing.
Sampled‐data cooperative semi‐global robust practical output regulation for nonlinear multi‐agent systems with an uncertain leader
Authors: Liu Wei , Zeng Kaiji , Liu Yu 
Published: July 2024

AbstractThis article explores the problem of sampled‐data cooperative robust practical output regulation for nonlinear multi‐agent systems whose leader system is unknown. In this study, the nonlinearities of the follower systems are not constrained by the linear growth condition. Based on the robust control technology and the adaptive control technology, a distributed output‐based sampled‐data control protocol is developed to deal with the uncertainty of the exosystem which can belong to any large known compact set. We first perform the coordinate transformation of closed‐loop system to obtain the so‐called augmented system, and then perform the stability analysis for this system. As a result, it is proven that the steady‐state tracking errors are in any small given neighborhood of the origin. Finally, the performance of the proposed controller is validated by a numerical example.
Harnessing Biomimicry for Controlled Adhesion on Material Surfaces
Authors: Li Weijun , Zhou Ruini , Ouyang Yirui , Guan Qingwen , Shen Yigang , Saiz Eduardo , Li Ming , Hou Xu 
Published: July 2024

AbstractNature serves as an abundant wellspring of inspiration for crafting innovative adhesive materials. Extensive research is conducted on various complex forms of biological attachment, such as geckos, tree frogs, octopuses, and mussels. However, significant obstacles still exist in developing adhesive materials that truly replicate the behaviors and functionalities observed in living organisms. Here, an overview of biological organs, structures, and adhesive secretions endowed with adhesion capabilities, delving into the intricate relationship between their morphology and function, and potential for biomimicry are provided. First, the design principles and mechanisms of adhesion behavior and individual organ morphology in nature are summarized from the perspective of structural and size constraints. Subsequently, the value of engineered and bioinspired adhesive materials through selective application cases in practical fields is emphasized. Then, a forward‐looking gaze on the conceivable challenges and associated opportunities in harnessing biomimetic strategies and biological materials for advancing adhesive material innovation is highlighted and cast.
Twinning and 9R Phase Transition Mediated Extraordinary Cold‐drawn Deformability in NiCoCrFeMo High‐Entropy Alloy
Authors: Liu Xuli , Wu Yidong , Zheng Boyuan , Bai Rui , Gao Lei , Dong Zhao , Song Chaoqian , Yu Yong , Gao Peng , Hui Xidong 
Published: July 2024

AbstractThe production and application of materials are evolving towards the low‐dimensional micro‐nano scale. Nevertheless, the fabrication of micron‐scale alloy fibers remains a challenge. Herein, a novel Ni‐Co‐Cr‐Fe‐Mo high‐entropy alloy (HEA) fiber with a cold‐drawn reduction rate of 99.9995% and a strain (ɛ) of 12.19 is presented without requiring intermediate annealing. The exceptional deformation strain of 11.62 within the fiber leads to extraordinary tensile strengths of 2.8 GPa at room temperature and 3.6 GPa at 123 K. The in‐depth investigation of the microstructure of fibers has revealed the cold drawing deformation mechanisms mediated by the synergistic effects of plane defects. Specifically, various geometrically necessary dislocation interfaces, such as dislocation walls and microbands, along with deformation twins and long‐period 9R structures, form in response to external stress when ɛ≤2.7. As the strain increases, the saturated layered structure emerges and progressively evolves into a 3D equiaxed crystal. Moreover, the formation and evolution of the 9R structure (i.e., the migration of incoherent twin boundaries), coupled with the interaction of partial dislocations and the role of deformation twins, are crucial factors determining the fiber's plastic response. This work provides a novel approach to discovering new high‐strength metallic fibers with excellent deformability through plane defects engineering.
Diamond‐Reinforced Al(H2PO4)3@Epoxy Hybrid Thermal Adhesive With Ultra‐High Thermal Conductivity and Bonding Strength
Authors: Gao Ge , Zhao Yuwei , Cao Wenxin , Su Zhenhua , Wang Xiaolei , Wang Zhuochao , Sun Tingting , Dai Bing , Han Jiecai , Li Bohong , Wang Chao , Zhu Jiaqi 
Published: July 2024

AbstractThe miniaturization, integration, and increased power of electronic devices have exacerbated serious heat dissipation issues. Thermally conductive adhesives, which effectively transfer heat and firmly bond components, are critical for addressing these challenges. This paper innovatively proposed a composite comprising inorganic phosphate/alumina as a matrix and diamond as filler. The composite achieved an isotropic thermal conductivity (TC) of up to 18.96 W m−1 K−1, significantly surpassing existing reports while maintaining electrical insulation. First‐principles calculations and experimental tests confirmed that the high TC of phosphate and excellent interface contact ensured efficient heat transfer. To optimize bonding performance, a modified‐diamond/Al(H2PO4)3@epoxy hybrid composite is subsequently developed using an organic modification method. The unique hybrid structure, combining inorganic thermal pathways and an organic adhesive network, enabled the hybrid composite to simultaneously possess a high TC (3.23 W m−1 K−1) and strong adhesion (14.35 MPa). Compared to previous reports, the comprehensive performance of this hybrid thermally conductive adhesive is exceptionally remarkable. The superior heat dissipation capability of the hybrid thermal adhesive is demonstrated in chip cooling scenarios. This organic/inorganic hybrid approach offered a new direction for obtaining advanced thermal interface materials, demonstrating significant application potential in chip soldering, packaging, and heat dissipation.
Super‐Stable Mineralization of Metal Ions from Smelting Wastewater by In Situ Synthesis of NiFe‐Based Layered Double Hydroxides for Catalytic Phenol Hydroxylation
Authors: Wang Yanling , Xu Yanqi , Li Cunjun , Wang Hai , Wang Linjiang 
Published: July 2024

AbstractThe super‐stable mineralization of metal ions from industrial wastewater by in situ synthesis of layered double hydroxides (LDHs) has been regarded as a sustainable approach from environmental protection and resource utilization perspectives. Herein, the study reports a super‐stable mineralization of metal ions including Ni, Fe, Cr, Mn, Cu, Ca, Al, etc. from smelting wastewater by in situ synthesis of NiFe‐based LDHs through facile coprecipitation. Such approach exhibits superior mineralization efficiency of metal ions simultaneously that can remove hundreds, thousands, or even tens of thousands mg/L of multiple metal ions to below the values of the Chinese National Emission Standards of Pollutants. Furthermore, the obtained NiFe‐based LDHs exhibit excellent catalytic performance of phenol hydroxylation due to the mineralization of multiple metals on the laminates, where 48.24% conversion of phenol and 71.58% selectivity of dihydroxybenzenes are realized under room temperature for 3 h. This work paves a sustainable strategy for hazardous material disposal and resource utilization.