Advanced Composites and Hybrid Materials最新文献

{"title":"MOF-derived carbon-coated NiS/NiS2 yolk-shell spheres as a satisfactory positive electrode material for hybrid supercapacitors","authors":"Jing Wang,&nbsp;Shuo Li,&nbsp;Ning Fu,&nbsp;Dayong Tian,&nbsp;Yong Zheng,&nbsp;Fang Wang,&nbsp;Chao Liu,&nbsp;Xiaolong Wang,&nbsp;Zhongyuan Zhou,&nbsp;Yongsheng Niu,&nbsp;Hao Liu,&nbsp;Guoxiu Wang,&nbsp;Shichun Mu,&nbsp;Jiahuan Luo","doi":"10.1007/s42114-025-01257-6","DOIUrl":"10.1007/s42114-025-01257-6","url":null,"abstract":"<div><p>Optimizing the performance of electrode materials to improve the energy density of supercapacitors is the focus of current research. Construction and design with complex yolk-shell structure, as a supercapacitor electrode material, are of great significance and challenging. Herein, a self-sacrificing template strategy was used to construct uniform carbon-modified NiS/NiS₂ yolk-shell spheres using a Ni-based metal–organic framework (Ni-soc-MOF) as the precursors. Especially, the carbon shells produced by the pyrolysis of the organic ligand can improve mechanical stability and electron conductivity. Therefore, the as-obtained NiS/NiS₂@C nanocomposites display a high specific capacity (1082 C g⁻¹at 1 A g⁻¹) and outstanding cycling stability (85% capacity retention after 5000 cycles). In addition, a hybrid supercapacitor device based on the yolk-shell NiS/NiS₂@C nanocomposite and porous carbon can deliver a high energy density of 56.2 Wh kg⁻¹ at 800 W kg⁻¹, while exhibiting an excellent capacity retention of 86% after 10,000 charge/discharge cycles, demonstrating the promising potential of yolk-shell NiS/NiS₂@C nanocomposites via Ni-soc-MOF-derived route in practical application.</p></div>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":"8 2","pages":""},"PeriodicalIF":23.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42114-025-01257-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable prospects of lignocellulosic wood and natural fiber-based materials in 3D and 4D printing","authors":"K. M. Faridul Hasan,&nbsp;Md Mazedur Rahman,&nbsp;Fatema Khanum Rima,&nbsp;Jakiya Sultana,&nbsp;Muhammad Abu Taher,&nbsp;Péter György Horváth,&nbsp;József Garab,&nbsp;László Bejó,&nbsp;Tibor Alpár","doi":"10.1007/s42114-025-01273-6","DOIUrl":"10.1007/s42114-025-01273-6","url":null,"abstract":"<div><p>The sustainable options for 3D/4D printing, utilizing lignocellulosic materials derived from wood and natural fibers, have gained significant attention in the pursuit of building a greener and more environmentally friendly world. As environmental concerns continue to grow, there is an increasing focus on greener materials and manufacturing processes. The utilization of these environmentally friendly alternatives as substitutes for synthetic fiber filled polymer matrices in 3D/4D printing is driven by the objective of enhancing the material properties of printed items while reducing material costs. 3D/4D printing, also known as additive manufacturing, represents a promising frontier in environmentally friendly manufacturing. Recent progress and advancements in 3D/4D printing technology have expanded its capabilities beyond prototyping to the rapid fabrication of finished goods. This review explores the characteristics, processing techniques, mechanical and physical properties, applications, and future possibilities of sustainable 3D/4D printed products developed from wood and natural fibers. Architectural design and polymer selection have the potential to yield materials with improved functionality, mechanical characteristics, porosity, and stability. Additionally, the multifunctional polymer-based 3D/4D printing product development has enabled the production of biomedical devices, electrical products, and aerospace-related items. The challenges associated with utilizing these products for large-scale production and other aspects of sustainable 3D/4D printing will also be discussed, along with recommendations for future solutions. Overall, this work offers valuable insights that can guide future research, development, and implementation of lignocellulosic-based 3D/4D printed composites. By exploring the potential of these sustainable materials in 3D/4D printing, it contributes to the advancement of environmentally friendly manufacturing practices and promotes the adoption of greener alternatives across various industries.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":"8 2","pages":""},"PeriodicalIF":23.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42114-025-01273-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Glutamic acid-loaded separable microneedle composite for long-acting hair regeneration treatment","authors":"Bricard Mbituyimana,&nbsp;Lina Fu,&nbsp;Hao Wang,&nbsp;Fuyu Qi,&nbsp;Yuchi Jiang,&nbsp;Fanbo Meng,&nbsp;Min Wu,&nbsp;Zhijun Shi,&nbsp;Guang Yang","doi":"10.1007/s42114-025-01287-0","DOIUrl":"10.1007/s42114-025-01287-0","url":null,"abstract":"<div><p>Androgenetic alopecia (AGA) is the most common type of hair loss frequently observed in clinics. Right now, there are no effective treatments for AGA. Here, we developed a biodegradable microneedle (MN) patch made of polylactic-co-glycolic acid (PLGA) loaded with glutamic acid (GA) that improves sustainable drug release and effective hair regeneration treatment. Once the patch has penetrated the skin, the GA-loaded MNs (GA-MNs) are quickly separated from their base and enter the skin. These MNs then serve as drug storage tanks inside the skin, releasing the therapeutics gradually for over 4 weeks. The sustained release of GA from long-acting biodegradable needles could lead to endocytosis by dermal papilla cells (DPCs), promoting the proliferation of cells. Compared with topical minoxidil, which requires daily treatment, animal studies have shown that GA-MNs can increase hair regeneration more effectively with lower dose frequency; the number of hair follicles in the GA-MNs group reached 83.68 ± 4.52%, which was significantly higher than that of the minoxidil group (56.93 ± 3.21%). This transdermal technology of biodegradable MNs shows considerable promise in clinical applications and offers a straightforward, safe, and effective therapy approach for clinical hair regeneration treatment.</p></div>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":"8 2","pages":""},"PeriodicalIF":23.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42114-025-01287-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The thermal reliability of indium-doped low solver SAC/Cu joints and the corresponding alloys","authors":"Jiaqi Yan,&nbsp;Shanshan Cai,&nbsp;Ming Yuan,&nbsp;Xiaojing Wang,&nbsp;Chen Liu,&nbsp;Jiajun Wang,&nbsp;Ning Liu,&nbsp;Yanlai Wang,&nbsp;Xiaohong Yuan,&nbsp;Hassan Algadi","doi":"10.1007/s42114-025-01236-x","DOIUrl":"10.1007/s42114-025-01236-x","url":null,"abstract":"<div><p>Based on CALPHAD-guided alloy design, key experimental investigations, and first-principles calculations, this study explores the melting characteristics, microstructure, mechanical properties, and fracture mechanisms of Sn-0.5Ag-0.7Cu-3Bi-<i>x</i>In (<i>x</i> = 4, 8, 12, 17, wt.%)/Cu solder joints. Research reveals that In doping lowers the solidus, liquidus, and peak temperatures, while increasing the melting range and undercooling. The matrix phases of 4In and 8In solders are β-Sn. When the In content exceeds 12 wt.%, the γ-InSn₄ phase starts to appear in the matrix, the matrix is transforming from the original single-phase into a dual-phase matrix. Consistent with it, the interfacial compound phase also has In doped, forming Cu₆(Sn, In)₅. During isothermal aging at 170 °C for 0–750 h, In doped less than 12 wt.% inhibits the growth of Cu₃(In,Sn) and Cu₆(Sn,In)₅, while the joints with just 12 wt.% In doping exhibit the strongest inhibition effect on the interface IMCs. After 750 h of aging, the 12In/Cu solder joint shows the best mechanical properties, with high shear strength and shear energy, minimal displacement damage, and consistent ductile fracture mode before and after aging. The nanoindentation results indicate that the hardness of the IMC layer remains nearly unchanged, and the modulus increases, along with an increase in E_i/H values and plasticity with increasing In content. These results are mainly due to the larger charge density difference between Cu and In atoms compared to those between Cu and Sn atoms, indicating a stronger Cu–In bond compared to the Cu–Sn bond. Because Young’s modulus is an intrinsic property, its magnitude may be related to the strength of bonding in the structure. This study, guided by CALPHAD for phase types and fractions, correlates nanoindentation with changes in mechanical properties and microstructure, and validates material performance through first-principles calculations. It has practical significance for controlling the growth of interface compounds, exploring the impact of the In element doping on solder joint performance, and stabilizing solder joint structures.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":"8 2","pages":""},"PeriodicalIF":23.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42114-025-01236-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploration of the zinc storage mechanism and kinetics of vanadium sulfides/reduced graphene oxide composites for aqueous zinc-ion battery cathodes","authors":"Bobae Ju,&nbsp;Hee Jo Song,&nbsp;Hyunseok Yoon,&nbsp;Woong-Ju Kim,&nbsp;Sungwoo Park,&nbsp;Jin Bae Lee,&nbsp;Dong-Wan Kim","doi":"10.1007/s42114-025-01283-4","DOIUrl":"10.1007/s42114-025-01283-4","url":null,"abstract":"<div><p>Aqueous zinc-ion batteries (AZIBs) are considered suitable devices for large-scale energy storage systems. Vanadium sulfides have gained wide attention as AZIB cathode materials owing to their low cost, high specific capacity, and fast Zn-ion insertion/extraction ability. However, a thorough examination of their actual operation as AZIB cathodes remains lacking. In this study, we synthesized three types of vanadium sulfides/reduced graphene oxide (V_xS₈/rGO, <i>x</i> = 2, 5, and 6), fabricated electrodes from these materials, and systemically explored their Zn-ion storage mechanisms and kinetics. All three V_xS₈/rGO electrodes required an electrochemical activation step, which involved charging over 1.8 V (vs. Zn/Zn²⁺), to obtain high reversible discharging–charging capacity. The V₅S₈/rGO and V₆S₈/rGO electrodes exhibited structural and morphological evolution during electrochemical activation and maintained 70% of their capacities for 700 cycles at a current density of 5 A g⁻¹. The V₂S₈/rGO electrode maintained its initial state during repeated discharge–charge cycling and, thus, exhibited exceptional long-term cycling stability with 99% capacity retention for 700 cycles at the same current density. These findings highlight the importance of an in-depth study of vanadium sulfide materials requiring electrochemical activation to achieve high-power- and energy–density AZIBs.</p></div>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":"8 2","pages":""},"PeriodicalIF":23.2,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42114-025-01283-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Excellent electrochemical performance based on covalently crosslinked chitosan hydrogel electrolytes induced structural stability against alkali","authors":"Yuchen Wang,&nbsp;Xuan Zhang,&nbsp;Xue Zhao,&nbsp;Xiaodong Yang,&nbsp;Ming Yuan,&nbsp;Yan Zheng,&nbsp;Jijun Tang,&nbsp;Wen Liu,&nbsp;Jiaoxia Zhang,&nbsp;Long Lin","doi":"10.1007/s42114-024-01191-z","DOIUrl":"10.1007/s42114-024-01191-z","url":null,"abstract":"<div><p>Alkali-resistant electrolytes are suitable for high-power equipment and harsh environments. However, most hydrogels lose stability in a strong alkaline environment. As such, the development of hydrogel electrolytes having an outstanding alkali resistance is desirable. In the work reported here, the quaternary ammonium group was introduced to chitosan to achieve excellent hydrophilicity and conductivity. Then, an alkali-resistant hydrogel polymer electrolyte was prepared by graft copolymerizing and crosslinking chitosan quaternary ammonium salt with acrylamide. The fracture elongation of the resulting hydrogel polymer electrolyte can reach 300%. The electrolyte has a high ionic conductivity of 1.66 × 10^–1 S·cm⁻¹ after being soaked in a strong alkaline solution. Meanwhile, salt solutions were used to further enhance the ionic conductivity that reached 2.42 × 10^–1 S·cm⁻¹. The potential window of the device prepared expanded from 1.0 to 1.3 V. The energy density and the power density reached 5.49 Wh·kg⁻¹ and 346.66 W·kg⁻¹, respectively. Finally, it was explored from a molecular level, for the first time, that free ions and solvent-separated ion pairs proceed with ionic migration to enhance ionic conductivity. Our findings provide valuable insights into the application of gel polymer electrolytes in future energy devices.</p></div>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":"8 2","pages":""},"PeriodicalIF":23.2,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sub-3 nm Pt3Ni nanoparticles for urea-assisted water splitting","authors":"Shun Lu,&nbsp;Xingqun Zheng,&nbsp;Kaixin Jiang,&nbsp;Qingmei Wang,&nbsp;Xingzu Wang,&nbsp;Muhammad Wakil Shahzad,&nbsp;Fengjun Yin,&nbsp;Ben Bin Xu,&nbsp;Qingsong Hua,&nbsp;Hong Liu","doi":"10.1007/s42114-025-01279-0","DOIUrl":"10.1007/s42114-025-01279-0","url":null,"abstract":"<div><p>The development of durable efficient electrocatalysts is crucial to alleviate the sluggish kinetics of electrocatalytic urea oxidation reaction (UOR) for energy-saving water splitting. Small Pt-based intermetallic compounds exhibit promising characteristics as UOR catalysts due to their distinctive electronic and geometric structures. This work reported a surfactant-assisted shape evolution method for the controlled synthesis of sub-3 nm Pt₃Ni nanoparticles on carbon black to achieve efficient electrocatalytic UOR. The synthesized catalyst features a uniform dodecahedral structure, maximizing Ni utilization and providing multiple active sites for UOR. The Pt₃Ni catalyst displays the lower working potential of 1.44 V versus reversible hydrogen electrode, outperforming Pt/C (1.78 V) at 10 mA cm⁻², with a smaller Tafel slope of 78.1 mV dec⁻¹, while maintaining exceptional stability during 100 h of continuous urea-assisted water electrolysis. Notably, UOR-boosted system needs only 1.36 V for 10 mA cm⁻², significantly lower than the 1.62 V required for traditional water splitting, highlighting its energy-efficient potential for H₂ production. Furthermore, theoretical studies indicate that Pt₃Ni(111) facilitates the adsorption and activation of urea molecules more effectively than Pt(111), avoiding competition from hydroxyl adsorption. The unique polyhedron structure of the sub-3 nm Pt₃Ni catalyst provides the catalytic active dual-sites, further promoting urea interaction. To the best of knowledge, this study represents the first report of Pt-M materials being utilized for the UOR, thereby expanding the application range of Pt-based alloys in urea electrocatalysis.</p></div>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":"8 2","pages":""},"PeriodicalIF":23.2,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42114-025-01279-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The crushing behavior and energy absorption characteristics of all-composite star-triangular honeycomb structure","authors":"Zhikang Liu,&nbsp;Bo Xiong,&nbsp;Yifei Zhang,&nbsp;Jiayi Liu,&nbsp;Wei Huang","doi":"10.1007/s42114-025-01276-3","DOIUrl":"10.1007/s42114-025-01276-3","url":null,"abstract":"<div><p>The energy absorption characteristics and toughness of carbon fiber-reinforced plastics (CFRP) are improved from two aspects of structure and material. In terms of structure, an all-composite star-triangle honeycomb structure (CSTH) with negative Poisson’s ratio characteristic was designed and fabricated firstly. From the aspect of material, the polyetherimide (PEI) film was added into the layers of CFRP to enhance the toughness. A quasi-static compression experiment of CSTH was carried out. Besides, environmental scanning electron microscopy (ESEM) and ultra depth of field microscope (UDFM) were used to analyze the microstructure of CSTH. The failure mode and damage mechanism of CSTH were compared and revealed novelly from macroscopic and microscopic aspects. The delamination resistance of carboxylic multiwalled carbon nanotube (MWCNT) which was added between PEI film and carbon fiber layers was investigated. The theoretical prediction model of the equivalent elastic modulus and the ultimate compressive strength of CSTH was established. The theoretical results were verified and modified by the experimental results. The maximum error of theoretical results was less than 15% compared with that of experimental results. Results showed that CSTH had a better energy absorption characteristic compared with the re-entrant honeycomb structure and X honeycomb structure. In addition, the foam and PEI film could enhance the toughness of CSTH.</p></div>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":"8 2","pages":""},"PeriodicalIF":23.2,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42114-025-01276-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of carbon-based conductive hydrogels and their potential for promoting nerve regeneration","authors":"Shuhui Yang,&nbsp;Jie Pan,&nbsp;Haijing Fu,&nbsp;Jingchuan Zheng,&nbsp;Fang Chen,&nbsp;Mingchen Zhang,&nbsp;Zhe Gong,&nbsp;Kaiyu Liang,&nbsp;Chengcheng Wang,&nbsp;Juncheng Lai,&nbsp;Xiangqian Fang,&nbsp;Jinjin Zhu","doi":"10.1007/s42114-025-01261-w","DOIUrl":"10.1007/s42114-025-01261-w","url":null,"abstract":"<div><p>Conductive hydrogels have the potential to facilitate nerve regeneration through various mechanisms, including providing physical support, enabling electrical signal transmission, and stimulating nerve cells to release growth factors. Carbon-based conductive materials, such as carbon nanotubes (CNTs) and graphene oxide (GO), are widely used in the construction of conductive hydrogels due to their advantages in electrical conductivity and biosafety. Herein, we fabricated conductive hydrogels by incorporating CNTs or GO into gelatin or chitosan. The gelatin- and chitosan-based electrospun fiber hydrogels were synthesized at room temperature using acetic acid/hexafluoroisopropanol and acetic acid/water as solvents, respectively. Subsequently, we investigated the morphology, swelling properties, mechanical properties, and electrical performance of the hydrogels. Scanning electron microscopy (SEM) images verified the uniform distribution of CNTs and GO within the different hydrogel formulations. The network structure formed by CNTs enhanced the swelling rate of the hydrogels. The incorporation of CNTs and GO elevated the compression elastic moduli of the hydrogels. Conductivity experiments revealed that the conductivity of graphene oxide was significantly improved upon soaking with sodium ascorbate. Notably, chitosan hydrogels containing reduced graphene oxide exhibited the highest conductivity. Pheochromocytoma 12 (PC12) cells could adhere to and spread on the hydrogels surface. These findings suggest that conductive hydrogels hold great promise as candidates for nerve repair in the future.</p></div>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":"8 2","pages":""},"PeriodicalIF":23.2,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42114-025-01261-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The embira bark fiber: a sustainable Amazon tape","authors":"Sheron S. Tavares,&nbsp;Lucas de Mendonça Neuba,&nbsp;Henry Colorado Lopera,&nbsp;Sergio Neves Monteiro,&nbsp;Marc André Meyers","doi":"10.1007/s42114-024-01170-4","DOIUrl":"10.1007/s42114-024-01170-4","url":null,"abstract":"<div><p>The embira bark fiber is routinely used in Brazil to construct simple structures because of its ease of extraction, flexibility, and considerable strength. It plays an important role, somewhat similar to duct tape, and is commonly used for temporary repairs and tying objects. The flexible bark is removed from the tree by making two cuts into it and manually pulling off the fibrous structure. Three similar but distinct embira bark fibers are characterized structurally and mechanically: <i>embira branca</i>, <i>embira capa bode</i>, and <i>embira chichá</i>. The bark separates readily into strips with thicknesses between 0.3 and 1 mm, enabling it to be twisted and bent without damage. The structure consists of aligned cellulose fibers bound by lignin and hemicellulose. Thus, it is a natural composite. The tensile strength of the three fibers varies in the range of 25 to 100 MPa, with no clear difference between them. There is structural and strength consistency among them. The mechanical strength of <i>embira branca</i> is measured for different fiber bundle diameters and is found to increase with decreasing diameter. Thermogravimetric analysis showed that degradation of the fibers initiates at 250 °C, consistent with other lignocellulosic fibers. X-ray diffraction identifies two major components: the monoclinic crystalline structure of cellulose and an amorphous phase; the crystallinity index is approximately 50%. The tensile strength shows significant variation, a characteristic of biological materials; this can be significantly improved by selective growing of embira-bearing trees.</p></div>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":"8 2","pages":""},"PeriodicalIF":23.2,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42114-024-01170-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}