Pub Date : 2026-06-01Epub Date: 2026-02-05DOI: 10.1016/j.mlblux.2026.100263
Farrukh Saleem , Zhao Chengxu , Yao Zaiqi , Wenbin Shangguan , Yao Xiaohu , Cheng Zhixiong , Yuan Chengyi , Haroon Ahmed , Tang Xiangmin , Tianzhi Luo
Due to high mechanical efficiency, closed-cell aluminum foam (CCAF) is suitable for lightweight structures and energy absorption applications. However, mechanical behavior of CCAF has not been fully apprehended in microstructure parameters. For this reason, closed-cells structure-performance of CCAF has been investigated by using comprehensive experimental and microstructure characterization method. Scanning electron microscopy and energy dispersive X-ray spectroscopy has been used to evaluate the morphology, deformation mechanism and crack propagation of CCAF. The results have shown that increase in relative densities is directly related to increase in yield strength, young's modulus and ultimate tensile strength due to improvement of load distribution and reduction of stress concentration in dense cell walls of CCAF.
{"title":"Microstructure characterization on tensile properties of closed-cell aluminum foam","authors":"Farrukh Saleem , Zhao Chengxu , Yao Zaiqi , Wenbin Shangguan , Yao Xiaohu , Cheng Zhixiong , Yuan Chengyi , Haroon Ahmed , Tang Xiangmin , Tianzhi Luo","doi":"10.1016/j.mlblux.2026.100263","DOIUrl":"10.1016/j.mlblux.2026.100263","url":null,"abstract":"<div><div>Due to high mechanical efficiency, closed-cell aluminum foam (CCAF) is suitable for lightweight structures and energy absorption applications. However, mechanical behavior of CCAF has not been fully apprehended in microstructure parameters. For this reason, closed-cells structure-performance of CCAF has been investigated by using comprehensive experimental and microstructure characterization method. Scanning electron microscopy and energy dispersive X-ray spectroscopy has been used to evaluate the morphology, deformation mechanism and crack propagation of CCAF. The results have shown that increase in relative densities is directly related to increase in yield strength, young's modulus and ultimate tensile strength due to improvement of load distribution and reduction of stress concentration in dense cell walls of CCAF.</div></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"27 ","pages":"Article 100263"},"PeriodicalIF":2.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146189531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-06-01Epub Date: 2026-02-05DOI: 10.1016/j.mlblux.2026.100264
Minsu Kim , Hiroaki Tatsumi , Sang-Wook Kim , Ji-Hyun Kim , Soong-Keun Hyun , Hiroshi Nishikawa
This study examines the effect of unidirectional porous copper (lotus Cu) on the reliability of Ag-sintered interfaces between Si and Cu during thermal cycling. In high-performance wide-bandgap semiconductor power modules, the large coefficient of thermal expansion (CTE) mismatch generates significant thermomechanical stresses, leading to interfacial degradation. Lotus Cu, with high vertical thermal conductivity and a low elastic modulus was proposed as an alternative joint material. Si/sintered Ag/lotus Cu and Si/sintered Ag/bulk Cu joints were fabricated via Ag particle paste and evaluated through thermal cycling tests (−55 °C to 150 °C). After 500 cycles, bulk Cu joints exhibited extensive delamination, whereas lotus Cu joints maintained bonding area with only localized interfacial damage. These results suggest that the unique pore structure of lotus Cu can redistribute thermal stress, provide more complex crack propagation paths, and potentially improve the reliability of the Si/Cu joint.
{"title":"Effect of lotus-type porous cu on reliability of ag-sintered joints during thermal cycling","authors":"Minsu Kim , Hiroaki Tatsumi , Sang-Wook Kim , Ji-Hyun Kim , Soong-Keun Hyun , Hiroshi Nishikawa","doi":"10.1016/j.mlblux.2026.100264","DOIUrl":"10.1016/j.mlblux.2026.100264","url":null,"abstract":"<div><div>This study examines the effect of unidirectional porous copper (lotus Cu) on the reliability of Ag-sintered interfaces between Si and Cu during thermal cycling. In high-performance wide-bandgap semiconductor power modules, the large coefficient of thermal expansion (CTE) mismatch generates significant thermomechanical stresses, leading to interfacial degradation. Lotus Cu, with high vertical thermal conductivity and a low elastic modulus was proposed as an alternative joint material. Si/sintered Ag/lotus Cu and Si/sintered Ag/bulk Cu joints were fabricated via Ag particle paste and evaluated through thermal cycling tests (−55 °C to 150 °C). After 500 cycles, bulk Cu joints exhibited extensive delamination, whereas lotus Cu joints maintained bonding area with only localized interfacial damage. These results suggest that the unique pore structure of lotus Cu can redistribute thermal stress, provide more complex crack propagation paths, and potentially improve the reliability of the Si/Cu joint.</div></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"27 ","pages":"Article 100264"},"PeriodicalIF":2.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146189528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-06-01Epub Date: 2026-01-06DOI: 10.1016/j.mlblux.2026.100262
M.S. Archana , S. Jayalekshmi , S. Deepa , Nandakumar Kalarikkal
Electrospun nanofibers with high surface area and tunable morphology are promising platforms for advanced functional materials. In this work, polyaniline (PANI)–graphene composites were blended with poly vinyl alcohol (PVA) and fabricated into nanofibers via electrospinning. Structural, chemical, morphological, and thermal properties were systematically investigated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The results reveal enhanced molecular ordering and strong interfacial interactions among PANI, graphene, and PVA, along with bead-free nanofibers exhibiting an average diameter of ∼32 nm with a narrow size distribution. TGA demonstrates improved thermal stability with delayed degradation compared to PANI/PVA systems reported in literature, attributed to the stabilizing role of graphene. These findings indicate that materials based on PANI–graphene/PVA nanofibers can serve as a tunable composite platform, which with appropriate compositional or surface modifications may be further developed for specific functional applications.
{"title":"Electrospun Polyaniline-Graphene/PVA Composite Nanofiber: Structural, Morphological and Thermal Characteristics","authors":"M.S. Archana , S. Jayalekshmi , S. Deepa , Nandakumar Kalarikkal","doi":"10.1016/j.mlblux.2026.100262","DOIUrl":"10.1016/j.mlblux.2026.100262","url":null,"abstract":"<div><div>Electrospun nanofibers with high surface area and tunable morphology are promising platforms for advanced functional materials. In this work, polyaniline (PANI)–graphene composites were blended with poly vinyl alcohol (PVA) and fabricated into nanofibers via electrospinning. Structural, chemical, morphological, and thermal properties were systematically investigated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The results reveal enhanced molecular ordering and strong interfacial interactions among PANI, graphene, and PVA, along with bead-free nanofibers exhibiting an average diameter of ∼32 nm with a narrow size distribution. TGA demonstrates improved thermal stability with delayed degradation compared to PANI/PVA systems reported in literature, attributed to the stabilizing role of graphene. These findings indicate that materials based on PANI–graphene/PVA nanofibers can serve as a tunable composite platform, which with appropriate compositional or surface modifications may be further developed for specific functional applications.</div></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"27 ","pages":"Article 100262"},"PeriodicalIF":2.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-07-12DOI: 10.1016/j.mlblux.2025.100249
Shuzheng Guo , Jingyi Huang , Na Ta , Fengze Cao , Sihua Ha , Shuai He , Jianli He , Luomeng Chao
Cs0.33WO3 nanoparticles exhibit strong localized surface plasmon resonance (LSPR), making them effective at absorbing near-infrared (NIR) light. However, effectively tuning the optical absorption of Cs0.33WO3 in the critical NIR range of 800–1000 nm has remained a major challenge. In this study, we employ aberration-corrected electron microscopy to conduct high-resolution electron energy loss spectroscopy (EELS) on both Cs0.33WO3 and LaB6 nanoparticles, reveal that the surface plasmon resonance in LaB6 nanoparticles occurs at a higher energy than in Cs0.33WO3, allowing LaB6 to absorb NIR light at shorter wavelengths. Based on this, we successfully adjusted the absorption characteristics of Cs0.33WO3 in the range of 800–1000 nm by utilizing the synergistic LSPR tuning of LaB6 nanoparticles.
{"title":"High energy-resolution electron energy loss spectroscopy and near infrared absorption study of cesium tungsten bronze and lanthanum hexaboride","authors":"Shuzheng Guo , Jingyi Huang , Na Ta , Fengze Cao , Sihua Ha , Shuai He , Jianli He , Luomeng Chao","doi":"10.1016/j.mlblux.2025.100249","DOIUrl":"10.1016/j.mlblux.2025.100249","url":null,"abstract":"<div><div>Cs<sub>0.33</sub>WO<sub>3</sub> nanoparticles exhibit strong localized surface plasmon resonance (LSPR), making them effective at absorbing near-infrared (NIR) light. However, effectively tuning the optical absorption of Cs<sub>0.33</sub>WO<sub>3</sub> in the critical NIR range of 800–1000 nm has remained a major challenge. In this study, we employ aberration-corrected electron microscopy to conduct high-resolution electron energy loss spectroscopy (EELS) on both Cs<sub>0.33</sub>WO<sub>3</sub> and LaB<sub>6</sub> nanoparticles, reveal that the surface plasmon resonance in LaB<sub>6</sub> nanoparticles occurs at a higher energy than in Cs<sub>0.33</sub>WO<sub>3</sub>, allowing LaB<sub>6</sub> to absorb NIR light at shorter wavelengths. Based on this, we successfully adjusted the absorption characteristics of Cs<sub>0.33</sub>WO<sub>3</sub> in the range of 800–1000 nm by utilizing the synergistic LSPR tuning of LaB<sub>6</sub> nanoparticles.</div></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"26 ","pages":"Article 100249"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-07-03DOI: 10.1016/j.mlblux.2025.100248
F.A.C. Nobrega , E.A.W. Menezes , R. Reichenbächer , C. Scheffler , R.F. Abreu , E.F. Morais , C.M.B. Cordeiro , A. Spickenheuer , S.C. Amico , A.S.B. Sombra
This article describes a rapid method of recoating optical fibers employing the dip-coating technique, using a polypropylene film former with a silane coupling agent, which reacts, yielding a protective film over the core. The silica optical fibers were recoated with film former sizings at concentrations of 5 % and 10 %. Microscopic analysis of the recoated area showed a smooth surface and an increase in diameter of 13.4 % and 16.5 %, respectively, compared to the uncoated fiber. The maximum curvature radius of the uncoated fibers was 3.69 ± 1.70 mm, whereas the fibers recoated with the 5 % and 10 % film former sizings reached a bending radius of 1.71 ± 1.38 mm and 1.55 ± 0.98 mm, representing 53.9 % and 57.9 % reduction, respectively. This shows that recoated optical fibers are more flexible than the uncoated ones. In all, the recoating of optical fibers proposed in this work results in fibers with smooth and flexible surfaces using a simple, cost-effective technique that can be implemented on large-scale processes.
{"title":"Simple and efficient optical fiber recoating procedure","authors":"F.A.C. Nobrega , E.A.W. Menezes , R. Reichenbächer , C. Scheffler , R.F. Abreu , E.F. Morais , C.M.B. Cordeiro , A. Spickenheuer , S.C. Amico , A.S.B. Sombra","doi":"10.1016/j.mlblux.2025.100248","DOIUrl":"10.1016/j.mlblux.2025.100248","url":null,"abstract":"<div><div>This article describes a rapid method of recoating optical fibers employing the dip-coating technique, using a polypropylene film former with a silane coupling agent, which reacts, yielding a protective film over the core. The silica optical fibers were recoated with film former sizings at concentrations of 5 % and 10 %. Microscopic analysis of the recoated area showed a smooth surface and an increase in diameter of 13.4 % and 16.5 %, respectively, compared to the uncoated fiber. The maximum curvature radius of the uncoated fibers was 3.69 ± 1.70 mm, whereas the fibers recoated with the 5 % and 10 % film former sizings reached a bending radius of 1.71 ± 1.38 mm and 1.55 ± 0.98 mm, representing 53.9 % and 57.9 % reduction, respectively. This shows that recoated optical fibers are more flexible than the uncoated ones. In all, the recoating of optical fibers proposed in this work results in fibers with smooth and flexible surfaces using a simple, cost-effective technique that can be implemented on large-scale processes.</div></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"26 ","pages":"Article 100248"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-07-30DOI: 10.1016/j.mlblux.2025.100252
Jiangfei Wang , Weijia Chen , Yijun Wen , Yuhan Peng , Siqi Liu , Shiwei He
High-entropy alloys (HEAs), as a new type of multi-element alloy, have become widely studied electrocatalytic materials in recent years due to their excellent catalytic performance. The experimental material used FeCoNiAlMo HEA with equal atomic ratio as the precursor, and three-dimensional nanostructures were formed by dealloying in choline chloride-urea (ChCl-Urea). The results indicate that Fe20Co20Ni20Al20Mo20 HEA is mainly composed of body-centered cubic (BCC) phase and face-centered cubic (FCC) phase, with BCC phase accounting for a larger proportion. Due to the different corrosion resistance of elements and the difference in element content distribution between the two phases, the FCC phase is preferentially corroded, resulting in a three-dimensional porous morphology. This unique structure synergistically reduces the energy barrier during the hydrolysis dissociation process, giving the material a significant advantage in the oxygen evolution reaction (OER) process. At a current density of 10 mA cm−2, the overpotential of the treated alloy is as low as 312 mV, which is lower than the commercial RuO2-IrO2, and it has lower resistance and higher charge transfer efficiency.
高熵合金（High-entropy alloys, HEAs）作为一种新型的多元素合金，因其优异的催化性能而成为近年来被广泛研究的电催化材料。实验材料以等原子比的FeCoNiAlMo HEA为前驱体，在氯化胆碱-尿素（ChCl-Urea）中进行脱合金处理，形成三维纳米结构。结果表明：Fe20Co20Ni20Al20Mo20 HEA主要由体心立方（BCC）相和面心立方（FCC）相组成，其中BCC相所占比例较大；由于元素的耐蚀性不同以及两相之间元素含量分布的差异，FCC相优先被腐蚀，形成三维多孔形态。这种独特的结构协同降低了水解解离过程中的能垒，使材料在析氧反应（OER）过程中具有显著的优势。在电流密度为10 mA cm−2时，处理后的合金的过电位低至312 mV，低于工业RuO2-IrO2，并且具有更低的电阻和更高的电荷转移效率。
{"title":"Electrochemical dealloying in ChCl-Urea Deep eutectic solvent: A strategy to fabricate porous FeCoNiAlMo high-entropy alloy with enhanced oxygen evolution reaction activity","authors":"Jiangfei Wang , Weijia Chen , Yijun Wen , Yuhan Peng , Siqi Liu , Shiwei He","doi":"10.1016/j.mlblux.2025.100252","DOIUrl":"10.1016/j.mlblux.2025.100252","url":null,"abstract":"<div><div>High-entropy alloys (HEAs), as a new type of multi-element alloy, have become widely studied electrocatalytic materials in recent years due to their excellent catalytic performance. The experimental material used FeCoNiAlMo HEA with equal atomic ratio as the precursor, and three-dimensional nanostructures were formed by dealloying in choline chloride-urea (ChCl-Urea). The results indicate that Fe<sub>20</sub>Co<sub>20</sub>Ni<sub>20</sub>Al<sub>20</sub>Mo<sub>20</sub> HEA is mainly composed of body-centered cubic (BCC) phase and face-centered cubic (FCC) phase, with BCC phase accounting for a larger proportion. Due to the different corrosion resistance of elements and the difference in element content distribution between the two phases, the FCC phase is preferentially corroded, resulting in a three-dimensional porous morphology. This unique structure synergistically reduces the energy barrier during the hydrolysis dissociation process, giving the material a significant advantage in the oxygen evolution reaction (OER) process. At a current density of 10 mA cm<sup>−2</sup>, the overpotential of the treated alloy is as low as 312 mV, which is lower than the commercial RuO<sub>2</sub>-IrO<sub>2</sub>, and it has lower resistance and higher charge transfer efficiency.</div></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"26 ","pages":"Article 100252"},"PeriodicalIF":2.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-10-23DOI: 10.1016/j.mlblux.2025.100259
Joel Renaud Ngouanom Gnidakouong , Arnaud Takungang Kamdem , Bertrand Sitamtze Youmbi , Claude Valery Ngayihi Abbe
This study explores the effect of straining angle on the piezoresistive behaviour of carbon nanotube (CNT)-cellulose nanocrystal (CNC) composites. By varying the angle between the directions of strain and tunnelling distance, the research investigates the impact on composite strain sensing sensitivity. Additionally, the optimal CNC weight fraction that maximizes the piezoresistive performance under elastic strain is determined using a polynomial interpolation of a validated analytical model. The findings indicate that the ideal case is when the direction of strain is parallel to the average tunnelling distance direction, and 0.5 % is the optimal CNC weight content for elastic strains. These findings may provide valuable insights for designing high-performance and sustainable strain sensors based on CNT-CNC composites.
{"title":"Optimizing piezoresistive response of carbon nanotube-cellulose nanocrystal composites","authors":"Joel Renaud Ngouanom Gnidakouong , Arnaud Takungang Kamdem , Bertrand Sitamtze Youmbi , Claude Valery Ngayihi Abbe","doi":"10.1016/j.mlblux.2025.100259","DOIUrl":"10.1016/j.mlblux.2025.100259","url":null,"abstract":"<div><div>This study explores the effect of straining angle on the piezoresistive behaviour of carbon nanotube (CNT)-cellulose nanocrystal (CNC) composites. By varying the angle between the directions of strain and tunnelling distance, the research investigates the impact on composite strain sensing sensitivity. Additionally, the optimal CNC weight fraction that maximizes the piezoresistive performance under elastic strain is determined using a polynomial interpolation of a validated analytical model. The findings indicate that the ideal case is when the direction of strain is parallel to the average tunnelling distance direction, and 0.5 % is the optimal CNC weight content for elastic strains. These findings may provide valuable insights for designing high-performance and sustainable strain sensors based on CNT-CNC composites.</div></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"26 ","pages":"Article 100259"},"PeriodicalIF":2.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145415825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-09-08DOI: 10.1016/j.mlblux.2025.100257
Azkar Saeed Ahmad , Zhuoyang Yu , Sizhe Wang , Tong Weng , Wenting Lu , Baihong Sun , Jiewu Song , Qian Zhang , Martin Kunz , Bihan Wang , Elissaios Stavrou
We report the synthesis of the AuGa2 intermetallic compound, using a direct reaction of the relevant elements at room temperature and at very low pressure. The pressure needed for the synthesis is ≈ 0.1 GPa, that is at the lower limit of modern large volume presses, routinely used to synthesize other commercially available materials. This study presents a new method of synthesizing AuGa2, which is much more cost efficient and environmentally friendly than the previously used high-temperature synthesis techniques, and will open new possibilities of synthesizing other intermetallic compounds using high-pressure athermal techniques.
{"title":"High pressure synthesis and structural study of AuGa2 intermetallic compound","authors":"Azkar Saeed Ahmad , Zhuoyang Yu , Sizhe Wang , Tong Weng , Wenting Lu , Baihong Sun , Jiewu Song , Qian Zhang , Martin Kunz , Bihan Wang , Elissaios Stavrou","doi":"10.1016/j.mlblux.2025.100257","DOIUrl":"10.1016/j.mlblux.2025.100257","url":null,"abstract":"<div><div>We report the synthesis of the AuGa<sub>2</sub> intermetallic compound, using a direct reaction of the relevant elements at room temperature and at very low pressure. The pressure needed for the synthesis is ≈ 0.1 GPa, that is at the lower limit of modern large volume presses, routinely used to synthesize other commercially available materials. This study presents a new method of synthesizing AuGa<sub>2</sub>, which is much more cost efficient and environmentally friendly than the previously used high-temperature synthesis techniques, and will open new possibilities of synthesizing other intermetallic compounds using high-pressure athermal techniques.</div></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"26 ","pages":"Article 100257"},"PeriodicalIF":2.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-10-13DOI: 10.1016/j.mlblux.2025.100258
Jigneshkumar Thakkar , Nishant Pandya
A self-healing pigmented coating incorporating polyurea microcapsules with linseed oil and calcined fly ash was synthesized, characterized through various analytical techniques, and tested across four formulations, with the Microcapsule 4.35 wt% (MC435) variant exhibiting marked enhancements in abrasion resistance and hydrophobicity, while the Microcapsule 8.70 wt% (MC870) formulation showed decreased abrasion resistance despite notable improvements in contact angle and self-healing properties.
{"title":"Pigmented epoxy polyamine self-healing coating based on polyurea-calcined fly ash-linseed oil (PU-CFA-oil) microcapsule","authors":"Jigneshkumar Thakkar , Nishant Pandya","doi":"10.1016/j.mlblux.2025.100258","DOIUrl":"10.1016/j.mlblux.2025.100258","url":null,"abstract":"<div><div>A self-healing pigmented coating incorporating polyurea microcapsules with linseed oil and calcined fly ash was synthesized, characterized through various analytical techniques, and tested across four formulations, with the Microcapsule 4.35 wt% (MC435) variant exhibiting marked enhancements in abrasion resistance and hydrophobicity, while the Microcapsule 8.70 wt% (MC870) formulation showed decreased abrasion resistance despite notable improvements in contact angle and self-healing properties.</div></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"26 ","pages":"Article 100258"},"PeriodicalIF":2.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145319465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Collagen and elastin are the main fibrous proteins of load-bearing soft tissues, conferring extensibility and strength upon those tissues through their interactions. However, to date, only a few techniques have been developed to fabricate fiber composites made from these proteins. Here we present an original method of fabricating fibrous composites of collagen and elastin and characterize their mechanical behavior. Soluble elastin was electrospun to form a sheet of elastin fibers, which was rolled and submerged in an acidic solution of collagen to permit collagen infiltration. The construct was incubated at 37 °C for 1 h so that collagen fibers self-assembled into the elastin fiber network, forming an elastin/collagen fiber composite. Simultaneous application of static mechanical loading and a chemical cross-linker, genipin, to the construct for an additional 24 h was also performed for fiber alignment. SEM observation revealed that elastin and collagen fibers were well integrated, although effects of mechanical loading to align those fibers were not observed. These elastin/collagen fiber composites possessed mechanical properties between those of collagen and elastin. Tensile properties benefited from collagen, whereas viscoelastic properties were derived from elastin. This method can be applied to development of artificial replacements of load-bearing soft tissues, such as tendon and meniscus.
{"title":"A novel method to fabricate elastin/collagen fiber composites: Proof of concept","authors":"Kosuke Shinokawa , Ayae Sugawara-Narutaki , Jeonghyun Kim , Takeo Matsumoto , Eijiro Maeda","doi":"10.1016/j.mlblux.2025.100255","DOIUrl":"10.1016/j.mlblux.2025.100255","url":null,"abstract":"<div><div>Collagen and elastin are the main fibrous proteins of load-bearing soft tissues, conferring extensibility and strength upon those tissues through their interactions. However, to date, only a few techniques have been developed to fabricate fiber composites made from these proteins. Here we present an original method of fabricating fibrous composites of collagen and elastin and characterize their mechanical behavior. Soluble elastin was electrospun to form a sheet of elastin fibers, which was rolled and submerged in an acidic solution of collagen to permit collagen infiltration. The construct was incubated at 37 °C for 1 h so that collagen fibers self-assembled into the elastin fiber network, forming an elastin/collagen fiber composite. Simultaneous application of static mechanical loading and a chemical cross-linker, genipin, to the construct for an additional 24 h was also performed for fiber alignment. SEM observation revealed that elastin and collagen fibers were well integrated, although effects of mechanical loading to align those fibers were not observed. These elastin/collagen fiber composites possessed mechanical properties between those of collagen and elastin. Tensile properties benefited from collagen, whereas viscoelastic properties were derived from elastin. This method can be applied to development of artificial replacements of load-bearing soft tissues, such as tendon and meniscus.</div></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"26 ","pages":"Article 100255"},"PeriodicalIF":2.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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