Springer最新文献_第9页

Hierarchical WO3 nanostructures via hydrothermal strategy: optical bandgap tuning and high-rate electrochemical response for next-generation supercapacitors 基于水热策略的分层WO3纳米结构：下一代超级电容器的光学带隙调谐和高速率电化学响应

IF 2.9 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-10-18 DOI: 10.1140/epjp/s13360-025-06963-0

K. Sphoorthi, A. P. Nagendra Babu, C. G. Renuka

{"title":"Hierarchical WO3 nanostructures via hydrothermal strategy: optical bandgap tuning and high-rate electrochemical response for next-generation supercapacitors","authors":"K. Sphoorthi, A. P. Nagendra Babu, C. G. Renuka","doi":"10.1140/epjp/s13360-025-06963-0","DOIUrl":"10.1140/epjp/s13360-025-06963-0","url":null,"abstract":"<div><p>Hexagonal tungsten trioxide (h-WO<sub>3</sub>) is a noteworthy electrode material because of its tunnel-like lattice, multivalent tungsten states, and defect-mediated redox chemistry. This paper identifies hydrothermal duration as a significant factor in determining phase purity, oxygen vacancy density, and crystallite coherence, which directly influences electrochemical performance. By varying the synthesis time systematically (12–72 h), we discover a transition from disordered nanosheets (W12) to hierarchically organized nanosheet nanorod frameworks (W72), the latter of which displays optimal W<sup>6+</sup>/W<sup>5+</sup> ratios, effective defect management, and improved electron–phonon coupling (16.6 eV). These enhancements from atomic to mesoscale are reflected in the performance metrics: the W72 electrode delivers 473.45 F g<sup>−1</sup> at 1 A g<sup>−1</sup>, retaining 160.34 F g<sup>−1</sup> at 3 A g<sup>−1</sup>, with minimal charge-transfer resistance (R<sub>ct</sub> = 4.99 Ω) and low series resistance (R<sub>s</sub> = 0.319 Ω). The asymmetric configuration (W72//AC) achieves an energy density of 15.3 Wh k g<sup>−1</sup> and a power density of 2461.5 W k g<sup>−1</sup>, sustaining 82.3% capacitance retention after 1000 cycles and a quick relaxation time (τ = 0.602 s). This work demonstrates that hydrothermal time-engineering is a robust method for optimizing defects and crystallinity, positioning h-WO<sub>3</sub> as a scalable platform for high-rate, environmentally sustainable supercapacitors and hybrid energy storage systems.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 10","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Re-Doped Ni/TiO₂ Catalyst with Enhanced Active Site Dispersion and Optimized Adsorption Behavior for High-Efficiency Hydrogenation of Dimethyl Oxalate To Methyl Glycolate 重掺杂Ni/TiO 2催化剂活性位点分散性增强及对草酸二甲酯高效加氢制乙醇酸甲酯吸附行为的优化

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-10-18 DOI: 10.1007/s10562-025-05203-5

Hao Wang, Ni Zhang, Jiang Gong, Fengling Zheng, Jianwei Li, Zhoulin Hu, Chuancai Zhang

{"title":"Re-Doped Ni/TiO₂ Catalyst with Enhanced Active Site Dispersion and Optimized Adsorption Behavior for High-Efficiency Hydrogenation of Dimethyl Oxalate To Methyl Glycolate","authors":"Hao Wang, Ni Zhang, Jiang Gong, Fengling Zheng, Jianwei Li, Zhoulin Hu, Chuancai Zhang","doi":"10.1007/s10562-025-05203-5","DOIUrl":"10.1007/s10562-025-05203-5","url":null,"abstract":"<div><p>The Ni-Re/TiO<sub>2</sub> catalyst was synthesized <i>via</i> the impregnation method, exhibiting exceptional catalytic performance in the hydrogenation of dimethyl oxalate (DMO) to methyl glycolate (MG). With low Ni and Re loadings (2.5Ni0.5Re/TiO<sub>2</sub>), the catalyst achieved 94% DMO conversion and 96% MG selectivity, maintaining impressive stability for over 200 h, highlighting its potential for industrial applications. Characterization studies demonstrated that Re doping promotes strong electronic interactions between Ni and Re, stabilizing and enhancing the dispersion of Ni nanoparticles, which facilitates H<sub>2</sub> activation. Concurrently, the presence of ReOx species introduces abundant Lewis acid sites, which enhance the adsorption and activation of C = O groups, thus facilitating DMO adsorption and dissociation. The superior catalytic performance arises from the synergistic interactions between ReOx and Ni species, providing valuable insights into the development of low-loading, high-activity catalysts for DMO hydrogenation.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 11","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fine-tuning of localized surface plasmon resonances in gold nanoshells 金纳米壳中局部表面等离子体共振的微调

IF 2.6 4区材料科学

Journal of Nanoparticle Research Pub Date : 2025-10-18 DOI: 10.1007/s11051-025-06478-w

María Y. Paredes, Alberto F. Scarpettini

引用次数: 0

Passive control of wing-tip vortices through a grooved-tip design 翼尖凹槽涡的被动控制

IF 2.5 3区工程技术

Experiments in Fluids Pub Date : 2025-10-18 DOI: 10.1007/s00348-025-04128-4

Junchen Tan, Shūji Ōtomo, Ignazio Maria Viola, Yabin Liu

{"title":"Passive control of wing-tip vortices through a grooved-tip design","authors":"Junchen Tan, Shūji Ōtomo, Ignazio Maria Viola, Yabin Liu","doi":"10.1007/s00348-025-04128-4","DOIUrl":"10.1007/s00348-025-04128-4","url":null,"abstract":"<p>This paper investigates the characteristics and control of tip vortices generated by a finite wing, focusing on the impact of the novel grooved-tip designs. Tip vortices can lead to flow loss, noise, vibration and cavitation in hydrodynamic systems. We propose and develop a grooved-tip design, featuring multiple grooves distributed along the wing tip to alter the tip vortex structure and dynamics. Four grooved-tip designs, including tilted and shrinking grooves, were experimentally investigated. Streamwise and cross-flow particle image velocimetry (PIV) measurements were employed to visualise the flow fields near the wing tip and along the primary tip vortex trajectory. The PIV results demonstrate that the grooved-tip designs significantly reduce the velocity magnitude within the primary tip vortex. This velocity deficit is attributed to the decreased suction within the vortex core. Furthermore, cross-flow PIV measurements reveal that the tip separation vortex is substantially suppressed, and the strength of the primary tip vortex is significantly mitigated. Downstream of the wing, the grooved tips lead to a reduction in vortex swirling strength and an enlargement of the vortex dimensions, suggesting enhanced diffusion and a reduction of the pressure drop of approximately 40%, based on the estimation from a reduced-order model linking pressure to vortex swirling strength. Our findings highlight the potential of these grooved-tip designs to effectively modify tip vortex behaviour and mitigate the pressure drop within the tip vortex region, with negligible changes to the lift and drag performance. This work can inform advanced passive vortex control strategies in wing- and blade-based systems, with potential applications in hydrofoils of marine vessels and underwater vehicles, as well as in turbines and propellers.</p>","PeriodicalId":554,"journal":{"name":"Experiments in Fluids","volume":"66 11","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00348-025-04128-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Trihalomethane Levels in Swimming Pool Waters and Removal of Trihalomethanes Using Modified Membrane Systems 游泳池水中三卤甲烷含量及改良膜系统去除三卤甲烷

IF 3 4区环境科学与生态学

Water, Air, & Soil Pollution Pub Date : 2025-10-18 DOI: 10.1007/s11270-025-08661-0

Fatih Durmaz, Yasin Andırıcı

{"title":"Trihalomethane Levels in Swimming Pool Waters and Removal of Trihalomethanes Using Modified Membrane Systems","authors":"Fatih Durmaz, Yasin Andırıcı","doi":"10.1007/s11270-025-08661-0","DOIUrl":"10.1007/s11270-025-08661-0","url":null,"abstract":"<div><p>Swimming pool waters may contain carcinogenic disinfection by-products formed by the reaction of chlorine and its compounds—added for disinfection purposes—with organic substances either present in the source water or introduced through swimming activities. Trihalomethanes (THMs) are among the most common of these by-products. In this study, the levels of THMs in the water of an indoor swimming pool located in the Selçuklu district of Konya were investigated, along with the efficiency of removing these compounds using modified ultrafiltration systems. For this purpose, water samples ranging from 80 to 100 L were collected weekly for 8 weeks following the morning swimming sessions. The samples were analyzed for free chlorine, combined chlorine, pH, THMs, Total Organic Carbon (TOC), and Total Inorganic Carbon (TIC). The water was then filtered through a pilot-scale ultrafiltration system with a pre-treatment unit consisting of mixed-bed activated carbon and zeolite. Post-filtration, THM and TOC analyses were performed and the results were compared to those of unfiltered pool water. Additionally, samples were taken from the municipal tap water supplying the pool, and analyzed for free chlorine, combined chlorine, pH, THMs, TOC, and TIC. The study found that the modified ultrafiltration system achieved a 93% removal rate of THMs, with an average initial concentration of 257 μg/L in the pool water. Since the TOC level was measured below the device's detection limit of 2.26 mg/L after treatment, a removal percentage could not be stated. Furthermore, a significant correlation was identified between THM formation and both pH level and combined chlorine concentration of the water.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"237 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of QCD-based equation of state on properties of compact stars in gravity’s rainbow 基于qcd的态方程对引力彩虹中致密恒星性质的影响

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-10-18 DOI: 10.1140/epjc/s10052-025-14918-z

Ayan Banerjee, Baiju Dayanandan, Javlon Rayimbaev, Sardor Murodov, Inomjon Ibragimov, Sokhibjan Muminov, Ikram Davletov

{"title":"Effects of QCD-based equation of state on properties of compact stars in gravity’s rainbow","authors":"Ayan Banerjee, Baiju Dayanandan, Javlon Rayimbaev, Sardor Murodov, Inomjon Ibragimov, Sokhibjan Muminov, Ikram Davletov","doi":"10.1140/epjc/s10052-025-14918-z","DOIUrl":"10.1140/epjc/s10052-025-14918-z","url":null,"abstract":"<div><p>In this work, we study the structural and dynamical properties of compact stars using a QCD-motivated equation of state (EoS) within the framework of Gravity’s Rainbow. This theory was proposed as a way to bridge the gap between general relativity and quantum mechanics. Utilizing the modified Tolman–Oppenheimer–Volkoff (TOV) equations, this study examines the impact of energy-dependent spacetime metrics, inspired by doubly special relativity, on the equilibrium configurations of compact stars, particularly those composed of deconfined quark matter. Particularly, we focus on the important consequences arising from applying strong interaction effects, color superconductivity, and the presence of a finite density jump across the quark-hadron interface in the equation of state. In a systematic approach, we investigate the mass-radius relations and compactness of stars, showing the impact of the rainbow on the maximum stable mass and radii of QSs. Notably, the resulting mass-radius relations are well-supported by recent high-precision astrophysical observations, such as the NICER measurement of PSR J0740+6620 and gravitational wave observations (e.g., GW170817). Estimates further confirm these models within observational bounds, while dynamical stability analysis ensures that these configurations are dynamically stable in a large parameter space. Based on these findings, we conclude that quark stars in Gravity’s Rainbow are compact object solutions with viability, as well as provide new avenues in terms of interplay between exotic matter, modified gravity, and observable astrophysical effects.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 10","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14918-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Towards a nuanced application of the established hierarchy integrating specific adaptations to nanomaterial risk management: comment on the article by Omari Shekaftik et al. (J Nanopart Res (2023) 25, 245) regarding an analysis of “hierarchy of controls” in workplaces and laboratories involving nanomaterials 对已建立的层次结构进行细致入微的应用，整合纳米材料风险管理的特定适应：对Omari Shekaftik等人（J Nanopart Res(2023) 25,245）关于工作场所和实验室中涉及纳米材料的“控制层次”分析的文章的评论

IF 2.6 4区材料科学

Journal of Nanoparticle Research Pub Date : 2025-10-18 DOI: 10.1007/s11051-025-06473-1

Tristan Berger, Sonja Boland, Emmanuel Flahaut, Corinne Chanéac, Anna Bencsik

{"title":"Towards a nuanced application of the established hierarchy integrating specific adaptations to nanomaterial risk management: comment on the article by Omari Shekaftik et al. (J Nanopart Res (2023) 25, 245) regarding an analysis of “hierarchy of controls” in workplaces and laboratories involving nanomaterials","authors":"Tristan Berger, Sonja Boland, Emmanuel Flahaut, Corinne Chanéac, Anna Bencsik","doi":"10.1007/s11051-025-06473-1","DOIUrl":"10.1007/s11051-025-06473-1","url":null,"abstract":"<p>The article by Omari Shekaftik, Golbabaei, and SheikhMozafari (J Nanopart Res 25(12):245, 2023) proposes a revised hierarchy of control measures in the context of occupational exposure to nanomaterials, prioritizing personal protective equipment (PPE) over traditional collective and elimination-based measures. While the authors argue that certain conventional approaches are impractical for nanomaterial-related environments, this perspective presents also critical drawbacks. The current commentary aims to examine the limitations of these revised changes. Four key points that challenge the inversion of the established hierarchy of controls are highlighted, notably the underestimation of elimination and substitution, and the questionable downgrading of engineering controls. While nanomaterials do present unique challenges, we argue that these do not justify a reversal of a model designed to reduce reliance on individual behavior and instead prioritize systematic protections. This commentary calls for a nuanced application of the established hierarchy, integrating adaptations where necessary while maintaining its fundamental principles. Ultimately, ensuring effective risk management requires maintaining a structured and evidence-based prevention strategy tailored to the specificities of nanomaterial exposure.\u0000</p>","PeriodicalId":653,"journal":{"name":"Journal of Nanoparticle Research","volume":"27 11","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of Branched-Chain Fatty Acids as Organic Friction-Modifier Additives for Boundary Lubrication 支链脂肪酸作为边界润滑有机摩擦改性添加剂的表征

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-10-18 DOI: 10.1007/s11249-025-02067-z

Masanori Iizuka, Masashi Mizukami, Kazue Kurihara

{"title":"Characterization of Branched-Chain Fatty Acids as Organic Friction-Modifier Additives for Boundary Lubrication","authors":"Masanori Iizuka, Masashi Mizukami, Kazue Kurihara","doi":"10.1007/s11249-025-02067-z","DOIUrl":"10.1007/s11249-025-02067-z","url":null,"abstract":"<div><p>Organic friction modifier additives, such as fatty acids, are widely used in the boundary lubrication regime to reduce friction. In this study, we employed resonance shear measurements to study 0.1 wt% solutions of branched-chain fatty acids in a linear model base oil/hexadecane and branched base oil/poly(α-olefin) (PAO) confined between mica surfaces under various applied loads (<i>L</i>). At <i>L</i> = 3.3 mN, the viscosity parameter (<i>b</i><sub>s</sub>) values of isostearic acid and isostearic acid T in hexadecane were one-seventh and one-thirtieth of the value of pure hexadecane, respectively. Especially, isostearic acid T in hexadecane had a lower viscosity parameter <i>b</i><sub>s</sub> value, one-eighth that of pure hexadecane even at <i>L</i> = 22.7 mN. On the other hand, the <i>b</i><sub>s</sub> value at <i>L</i> = 3.3 mN of isostearic acid in PAO was half the value of pure PAO and this effect disappeared at <i>L</i> = 11.6 mN; isostearic acid T in PAO resulted in a behavior similar to that of pure PAO. The densely packed structure of linear lubricants as hexadecane confined between the surfaces is known to cause a high <i>b</i><sub>s</sub> value and such a structure could be disturbed in the presence of branched-chain fatty acid additives. In case of the branched base oil, such as PAO, the densely packed state was not formed under confinement, thus the effect of the branched-chain fatty acid additive was not significant. This study demonstrated that a relatively small difference in molecular structure of an additive is important for efficiently reducing friction, especially in the boundary lubrication regime of linear base oils.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11249-025-02067-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crushing characteristics and energy dissipation modeling of Single-Particle-Size carbonaceous mudstone as roadbed fill 单粒径碳质泥岩路基填充物破碎特性及能量耗散模型

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-10-18 DOI: 10.1007/s10064-025-04570-y

Yan Wang, Hong-yuan Fu, Jian-Ping Song, Ling Zeng, Tao Li, Jian-Ping Xiong, Hong-Ri Zhang, Wen-Guang Wang, You-Jun Li, Jing-Cheng Chen

{"title":"Crushing characteristics and energy dissipation modeling of Single-Particle-Size carbonaceous mudstone as roadbed fill","authors":"Yan Wang, Hong-yuan Fu, Jian-Ping Song, Ling Zeng, Tao Li, Jian-Ping Xiong, Hong-Ri Zhang, Wen-Guang Wang, You-Jun Li, Jing-Cheng Chen","doi":"10.1007/s10064-025-04570-y","DOIUrl":"10.1007/s10064-025-04570-y","url":null,"abstract":"<div><p>Carbonaceous mudstone is widely utilized as subgrade filler; however, its application is often constrained by particle breakage, which adversely affects its mechanical properties and embankment performance. A systematic investigation is conducted on the influence of particle size, water content, and impact load on particle breakage through impact loading experiments conducted on four sample groups with uniform initial particle size distributions. The results reveal that increasing impact energy transitions particle size distributions from uniform to non-uniform, with this effect being more pronounced at higher water contents. Particle breakage intensifies with successive impact cycles, resulting in fractal distributions and higher fractal dimensions. Vertical strain and relative breakage rates exhibit a positive correlation with energy input, while volumetric deformation progresses through three distinct stages: compression, breakage, and stabilization. An energy dissipation model is developed to quantify energy variations during breakage, demonstrating a rapid increase in surface energy during initial impact cycles, followed by stabilization. Notably, larger particles accumulate greater surface energy under identical conditions. These findings offer a quantitative framework for understanding the dynamic behavior of carbonaceous mudstone and provide practical insights for optimizing its performance as subgrade filler.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The isolation and characterization of cellulose nanofibrils from the endocarp of Cocos nucifera 椰子内果皮纤维素纳米原纤维的分离与表征

IF 3 2区农林科学

Wood Science and Technology Pub Date : 2025-10-18 DOI: 10.1007/s00226-025-01711-0

Jacob Silliman, Hannes C. Schniepp

{"title":"The isolation and characterization of cellulose nanofibrils from the endocarp of Cocos nucifera","authors":"Jacob Silliman, Hannes C. Schniepp","doi":"10.1007/s00226-025-01711-0","DOIUrl":"10.1007/s00226-025-01711-0","url":null,"abstract":"<div><p>Coconuts are one of nature’s toughest lignocellulosic materials, possessing a fracture toughness on par with dentin and a compressive strength ten times that of bamboo. The coconut’s hierarchical structure has been characterized before, except prior studies left out one key aspect, the smallest length scales, approaching the molecular level. Here we exfoliate the hard shell of <i>Cocos nucifera</i>, revealing the true cellular organization and the dimensions of the crystalline cellulose nanofibrils found in the cell walls. After chemical pretreatments, we found entanglement between elongated sclereid cells that was not visible in the untreated coconut shell. This may contribute to the mechanical performance of the endocarp; it also utilizes elongated, high-aspect ratio structural elements at the cellular level, in addition to the nanofibrillar level previously known. Compared to other wood-like materials, the cellulose nanofibrils were shorter and represented a smaller weight fraction. This reduced length and the lower filler-to-matrix ratio could be the optimal lignocellulosic nanostructure for tough biomaterials. These newly discovered unique features explain how the endocarp of <i>Cocos nucifera</i> mechanically outperforms materials consisting of the same molecular components.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-025-01711-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0