International Journal of Mechanical and Materials Engineering最新文献

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Evaluating the corrosion resistance of electroless black Ni–P-CNT nanocomposite coatings for solar absorber panels 评价太阳能吸收板用化学黑色Ni-P-CNT纳米复合涂层的耐腐蚀性能
IF 2
International Journal of Mechanical and Materials Engineering Pub Date : 2025-12-29 DOI: 10.1186/s40712-025-00378-6
Mehdi Bagheri, Omid Amouaghaei, Mohammad Mahmoudi, Farideh Tabatabaei
{"title":"Evaluating the corrosion resistance of electroless black Ni–P-CNT nanocomposite coatings for solar absorber panels","authors":"Mehdi Bagheri,&nbsp;Omid Amouaghaei,&nbsp;Mohammad Mahmoudi,&nbsp;Farideh Tabatabaei","doi":"10.1186/s40712-025-00378-6","DOIUrl":"10.1186/s40712-025-00378-6","url":null,"abstract":"<div><p>Nickel–phosphorus–carbon nanotube (Ni–P–CNT) composite coatings demonstrate remarkable corrosion resistance and superior light absorption compared to conventional Ni–P coatings, making them highly suitable for solar absorber applications. This study explores the influence of CNT concentration (0–2.5 g·L⁻<sup>1</sup>) in the plating bath on the corrosion performance of aluminum substrates before and after a blackening process involving nitric acid etching to enhance solar absorption. The coatings were characterized using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and electrochemical techniques such as open-circuit potential (OCP), potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). Results revealed that CNT incorporation increased with concentration up to 2 g·L⁻<sup>1</sup> but decreased at 2.5 g·L⁻<sup>1</sup> due to agglomeration and particle precipitation. The optimal CNT loading of 1.5 g·L⁻<sup>1</sup> produced the most uniform morphology, minimal etching, and the highest corrosion resistance after blackening, attributed to well-dispersed CNTs and reduced surface porosity. In contrast, higher CNT concentrations led to increased coating defects and porosity, accelerating etching and corrosion. Overall, a CNT concentration of 1.5 g·L⁻<sup>1</sup> provided the best balance between corrosion protection and surface absorption efficiency, resulting in durable, high-performance coatings suitable for long-term solar energy applications.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"21 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s40712-025-00378-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146027291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Beyond reduction: observed mass gain in graphene oxide during eco-friendly processing with bio-reductants 超越还原:在生物还原剂的环保处理过程中观察到氧化石墨烯的质量增加
IF 2
International Journal of Mechanical and Materials Engineering Pub Date : 2025-12-28 DOI: 10.1186/s40712-025-00390-w
Lujain Moazeen, Ayman Al massri
{"title":"Beyond reduction: observed mass gain in graphene oxide during eco-friendly processing with bio-reductants","authors":"Lujain Moazeen,&nbsp;Ayman Al massri","doi":"10.1186/s40712-025-00390-w","DOIUrl":"10.1186/s40712-025-00390-w","url":null,"abstract":"<div>\u0000 \u0000 <p>This study reports a previously overlooked phenomenon in the green synthesis of graphene-based materials: a significant mass gain during the reduction of graphene oxide (GO) using olive leaf extract (OLE). While spectroscopic analyses (UV–Vis, FTIR) confirm effective reduction, the mass of the final product exceeded that of the starting graphite, with yields reaching up to 1.17 g of reduced graphene oxide (rGO) per 1.0 g of graphite. This apparent contradiction—reduction accompanied by mass increase—suggests that the process involves more than oxygen removal; we propose that polyphenolic compounds from the extract concurrently functionalize the carbon lattice. This work shifts the paradigm from viewing plant extracts solely as reducing agents to recognizing their potential as multifunctional modifiers in nanomaterial synthesis.</p>\u0000 </div>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"21 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s40712-025-00390-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146082359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advancing the reutilization of spent activated carbon for sculptural media: composites formulation and characterization 推进废活性炭在雕塑介质中的再利用:复合材料的配方和表征
IF 2
International Journal of Mechanical and Materials Engineering Pub Date : 2025-12-23 DOI: 10.1186/s40712-025-00385-7
Ronald Kayiwa, Amanda Tumusiime, Moses Kigozi, Hillary Kasedde, Francis Mujjuni, Moureen Nakyanzi, John Baptist Kirabira
{"title":"Advancing the reutilization of spent activated carbon for sculptural media: composites formulation and characterization","authors":"Ronald Kayiwa,&nbsp;Amanda Tumusiime,&nbsp;Moses Kigozi,&nbsp;Hillary Kasedde,&nbsp;Francis Mujjuni,&nbsp;Moureen Nakyanzi,&nbsp;John Baptist Kirabira","doi":"10.1186/s40712-025-00385-7","DOIUrl":"10.1186/s40712-025-00385-7","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 The disposal of spent activated carbon (SAC) remains a major environmental challenge worldwide, particularly in tropical regions where coconut husks serve as the primary precursor for activated carbon production. Conventional disposal methods, such as landfilling and incineration, raise ecological and health concerns due to the leaching of adsorbed contaminants and the release of greenhouse gases. This study investigates the potential of SAC as a sustainable additive in sculpturing composites. SAC was incorporated into epoxy, acrylic gel, Portland cement, and clay matrices at varying loadings (10–40 wt%). The composites were characterized for workability, durability, mechanical strength, bulk density, chemical stability, and aesthetic properties. Epoxy-SAC composites demonstrated superior strength (compressive 68 MPa; flexural 21 MPa), durability (&lt; 2% weight loss in wet–dry cycles), and chemical stability, making them suitable for indoor and outdoor sculptures. Cementitious–SAC composites exhibited moderate strength (35 MPa) and durability (4% weight loss), making them ideal for outdoor applications. Acrylic-SAC composites provided excellent matte-black aesthetics for indoor art, while clay-SAC composites exhibited limited durability and low strength. The study confirms SAC’s feasibility as a value-added material for sculpting applications, contributing to circular economy principles and environmental sustainability.</p>\u0000 </div>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"20 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s40712-025-00385-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145831453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unveiling unusual coloration in amorphous phosphate pigments: a study inspired by the mineral Brazilianite 揭开无定形磷酸盐颜料中不寻常的颜色:一项受矿物巴西铁矿启发的研究
IF 2
International Journal of Mechanical and Materials Engineering Pub Date : 2025-12-23 DOI: 10.1186/s40712-025-00389-3
Hiroaki Onoda, Kanata Higuchi, Thitirat Charoonsuk, Phieraya Pulphol, Rangson Muanglhua, Naratip Vittayakorn
{"title":"Unveiling unusual coloration in amorphous phosphate pigments: a study inspired by the mineral Brazilianite","authors":"Hiroaki Onoda,&nbsp;Kanata Higuchi,&nbsp;Thitirat Charoonsuk,&nbsp;Phieraya Pulphol,&nbsp;Rangson Muanglhua,&nbsp;Naratip Vittayakorn","doi":"10.1186/s40712-025-00389-3","DOIUrl":"10.1186/s40712-025-00389-3","url":null,"abstract":"<div>\u0000 \u0000 <p>Brazilianite, with the formula NaAl<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>(OH)<sub>4</sub>, exhibits an intriguing pale yellow to green coloration, a phenomenon not readily explained by the absence of conventional d-block chromophoric metal ions. This study investigates the synthesis of amorphous phosphate-based pigments compositionally analogous to Brazilianite, aiming to replicate and understand the origin of its distinctive coloration through controlled precursor stoichiometry and thermal processing. Sodium, aluminum, and phosphate precursors were precisely mixed and thermally treated. X-ray diffraction (XRD) confirmed the predominantly amorphous nature of the synthesized materials, irrespective of achieving long-range crystalline order analogous to mineral Brazilianite. Despite this, samples processed at intermediate temperatures (e.g., 300–400 °C) exhibited a consistent yellowish hue. This non-conventional coloration, attributed to intrinsic electronic or structural features within the amorphous phosphate network rather than traditional chromophores, represents a significant scientific innovation. This coloration was found to be intrinsically linked to the phosphate network itself. Stability assessments in acidic (0.1 wt% H<sub>2</sub>SO<sub>4</sub>) and basic (0.1 wt% NaOH) environments revealed significant vulnerability, attributed to the facile dissolution of sodium and aluminum phosphate species. Notably, the yellowish coloration persisted across various Na/Al/P compositional ratios, even with systematic variations in aluminum or sodium content. This strongly suggests that the observed color is not critically dependent on a precise Na: Al stoichiometry but is fundamentally governed by the local electronic structure within the phosphate network, potentially involving defect centers or specific P-O-Al/Na linkages. These findings offer valuable insights into designing novel, non-toxic, color-stable pigments where coloration arises from mechanisms beyond traditional transition metal ion incorporation, highlighting the potential role of controlled disorder in phosphate-based materials for sustainable applications.</p>\u0000 </div>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"21 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s40712-025-00389-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146027311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Amine‑rich deep eutectic solvents for cassava thermoplastic starch: composition‑dependent structure–property mapping and aging resistance 木薯热塑性淀粉的富胺深共晶溶剂:成分依赖的结构-性能映射和耐老化性
IF 2
International Journal of Mechanical and Materials Engineering Pub Date : 2025-12-22 DOI: 10.1186/s40712-025-00381-x
Chien Van Nguyen, Mai Thi Pham, Thuy Xuan Vu, Phuong Thi Hoang
{"title":"Amine‑rich deep eutectic solvents for cassava thermoplastic starch: composition‑dependent structure–property mapping and aging resistance","authors":"Chien Van Nguyen,&nbsp;Mai Thi Pham,&nbsp;Thuy Xuan Vu,&nbsp;Phuong Thi Hoang","doi":"10.1186/s40712-025-00381-x","DOIUrl":"10.1186/s40712-025-00381-x","url":null,"abstract":"<div>\u0000 \u0000 <p>Cassava‑based thermoplastic starch (TPS) is biodegradable yet constrained by brittleness, moisture sensitivity, and retrogradation. This study evaluates an amine‑rich deep eutectic solvent, choline chloride: monoethanolamine (ChCl: MEA, 1:2–1:5), as a dual plasticizer–compatibilizer for cassava TPS. Films (about 3 mm) were produced by twin‑screw extrusion and compression molding and benchmarked against glycerol‑plasticized TPS and a urea‑based DES (ChCl: urea, 1:2). ChCl: MEA markedly improved processability and properties: melt‑flow index increased from 1.02 to 2.36 g/10 min, glass‑transition temperature decreased from 72.4 to 36.8 °C, crystallinity index fell from 23.7% to 16.1%, thermal stability rose (286 °C to 320 °C), and water contact angle increased from 42° to 71.5°. The 1:3 composition achieved balanced mechanics (tensile strength 2.3 MPa; elongation 184%) and retained approximately 88% strength and approximately 81% elongation after 56 days at 23 °C/50% RH, outperforming glycerol (about 50% retention). All observed improvements were statistically significant (<i>p</i> &lt; 0.05). Overall, the amine‑rich ChCl: MEA DES affords superior plasticization and aging resistance relative to glycerol and urea‑based DES, advancing cassava TPS toward robust, biodegradable packaging applications.</p>\u0000 </div>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"21 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s40712-025-00381-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Low-temperature plasma nitrocarburizing of 15 − 5 PH stainless steel for optimized surface hardness and corrosion resistance 低温等离子体氮碳共渗15−5 PH不锈钢,优化表面硬度和耐腐蚀性
IF 2
International Journal of Mechanical and Materials Engineering Pub Date : 2025-12-20 DOI: 10.1186/s40712-025-00386-6
B. V. Subba Rao, Indumathi Vijey, Kasa Srinivasulu, Ștefan Țălu, Niranjan Patra
{"title":"Low-temperature plasma nitrocarburizing of 15 − 5 PH stainless steel for optimized surface hardness and corrosion resistance","authors":"B. V. Subba Rao,&nbsp;Indumathi Vijey,&nbsp;Kasa Srinivasulu,&nbsp;Ștefan Țălu,&nbsp;Niranjan Patra","doi":"10.1186/s40712-025-00386-6","DOIUrl":"10.1186/s40712-025-00386-6","url":null,"abstract":"<div><p>This study examines the influence of low-temperature plasma nitrocarburizing (LT-PNC) on the surface properties of 15 − 5 precipitation-hardening (PH) stainless steel. The material was treated at three temperatures, specifically 410 °C, 430 °C, and 460 °C, for duration of fifteen hours. The resulting surfaces were characterized by X-ray diffraction, microhardness measurements, salt fog testing, and potentiodynamic polarization. Plasma nitrocarburizing (PNC) produced a substantial increase in surface hardness, reaching approximately 70 HRC compared with the untreated value of about 42 HRC. At treatment temperatures of 430 °C and above, chromium nitride (CrN) formation was observed, which led to chromium depletion and a subsequent decline in corrosion resistance. In contrast, the sample processed at 410 °C achieved a balance between enhanced hardness and the preservation of corrosion resistance. Overall, the findings confirm that LT-PNCis an effective method for improving both durability and corrosion performance of 15 − 5 PH stainless steel, indicating its suitability for aerospace and other high-performance engineering applications.</p></div>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"20 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s40712-025-00386-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145887028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and characterization of sulfanilic-acid mediated by ZnO/Graphene oxide composite with preliminary electrochemical assessment 氧化锌/氧化石墨烯复合材料磺胺酸的合成与表征及初步电化学评价
IF 2
International Journal of Mechanical and Materials Engineering Pub Date : 2025-12-19 DOI: 10.1186/s40712-025-00366-w
Hanan. S, Huma. Sadiq, Hadia. Noor, Alejandra Garcia-Garcia, Sidra Dildar, Maha Sharif
{"title":"Synthesis and characterization of sulfanilic-acid mediated by ZnO/Graphene oxide composite with preliminary electrochemical assessment","authors":"Hanan. S,&nbsp;Huma. Sadiq,&nbsp;Hadia. Noor,&nbsp;Alejandra Garcia-Garcia,&nbsp;Sidra Dildar,&nbsp;Maha Sharif","doi":"10.1186/s40712-025-00366-w","DOIUrl":"10.1186/s40712-025-00366-w","url":null,"abstract":"<div><p>This study presents a simple co-precipitation method for a ternary composite integrating zinc oxide (ZnO), sulfanilic acid (SA) and graphene oxide (GO). Sulfanilic acid serves a dual role as a molecular linker and structural spacer, enabling uniform anchoring of ZnO nanoparticles onto GO sheets and preventing agglomeration. X-ray diffraction (XRD) revealed phase-pure hexagonal ZnO and partial ordering in GO. Raman spectroscopy confirmed the presence of distinct D and G bands, along with strong π–π stacking interactions, suggesting good integration of the carbon framework. X-ray photoelectron spectroscopy (XPS) provided evidence of N–Zn coordination and hydrogen bonding between sulfonic (S = O) and hydroxyl (H–O–Zn) groups, indicating successful chemical interactions at the interface. FTIR spectra further supported this by revealing characteristic peaks corresponding to amine and sulfonic acid functionalities. Preliminary electrochemical evaluation via cyclic voltammetry and impedance spectroscopy in 1 M NaOH revealed capacitive behavior, suggesting potential for further optimization toward energy storage applications.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"20 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s40712-025-00366-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145886809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exfoliation of graphite via three-roll milling and production of films with high electrical conductivity and electromagnetic interference shielding 通过三辊铣削对石墨进行剥落,生产具有高导电性和屏蔽电磁干扰的薄膜
IF 2
International Journal of Mechanical and Materials Engineering Pub Date : 2025-12-17 DOI: 10.1186/s40712-025-00382-w
Emi Orihara, Ryota Takei, Kyohei Sugata, Yoshihiko Arao
{"title":"Exfoliation of graphite via three-roll milling and production of films with high electrical conductivity and electromagnetic interference shielding","authors":"Emi Orihara,&nbsp;Ryota Takei,&nbsp;Kyohei Sugata,&nbsp;Yoshihiko Arao","doi":"10.1186/s40712-025-00382-w","DOIUrl":"10.1186/s40712-025-00382-w","url":null,"abstract":"<div><p>The objective of this study was to develop ecofriendly graphene nanoplatelet (GNP)/polymer films with high electrical conductivity and excellent electromagnetic interference (EMI) shielding performance. We have shown that three-roll milling could produce thin graphite platelet with 6–7 nm in thickness using carboxymethyl cellulose (CMC) as exfoliation agent. A large-area film with oriented exfoliated graphite could be produced by doctor-blade method. In order to maximize the electrical conductivity and EMI properties (0.5–18 GHz) of exfoliated graphite film, the number of passes, graphite particle size, and binder were investigated. It was found that films fabricated with poly(acrylic acid)(PAA) as a binder exhibited high electrical conductivities of up to 773 S/cm owing to doping effects of PAA. In contrast, CMC-based films demonstrated superior EMI shielding, reaching 29.9dB and 1169 dB/mm, which was attributed to the enhanced GNP exfoliation and in-plane orientation. We confirmed that films using graphite exfoliated by a roll mill exhibited superior electrical conductivity and EMI properties to films using commercially available GNPs. Our proposed method is suitable for mass production of high quality GNP, and allows the production of GNP films with low energy and low cost.</p></div>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"21 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s40712-025-00382-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145983027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring the potential of SrO-MgO nanocomposites: a sol–gel synthesis approach to gas sensing 探索SrO-MgO纳米复合材料的潜力:一种气体传感的溶胶-凝胶合成方法
IF 2
International Journal of Mechanical and Materials Engineering Pub Date : 2025-12-17 DOI: 10.1186/s40712-025-00369-7
Charushila K. Nerkar, Samin A. Shaikh, Leena M. Mahajan, Bapu S. Jagdale, Santosh S. Chobe
{"title":"Exploring the potential of SrO-MgO nanocomposites: a sol–gel synthesis approach to gas sensing","authors":"Charushila K. Nerkar,&nbsp;Samin A. Shaikh,&nbsp;Leena M. Mahajan,&nbsp;Bapu S. Jagdale,&nbsp;Santosh S. Chobe","doi":"10.1186/s40712-025-00369-7","DOIUrl":"10.1186/s40712-025-00369-7","url":null,"abstract":"<div><p>In this study, SrO-MgO nanocomposites (NCs) were synthesized using the sol–gel method. SrO-MgO NCs with varying SrO concentrations (1, 3, 5, and 7 atomic weight %) were synthesized and systematically investigated for their structural, optical, and gas-sensing properties. Field Emission Scanning Electron Microscopy (FESEM) revealed a highly porous and agglomerated morphology. Energy Dispersive X-ray Spectroscopy (EDS) confirmed the elemental composition with Sr, Mg, and O, validating the successful incorporation of SrO into the MgO matrix. X-ray diffraction (XRD) confirmed the crystalline nature of the composites and the cubic phase of MgO with SrO incorporation, as evidenced by peak shifts and changes in crystallite size. Fourier Transform Infrared Spectroscopy (FTIR) reveals the broad absorption peaks observed in the 400–600 cm<sup>-1</sup> region corresponding to the Mg–O and Sr–O stretching vibrations. The optical properties were analyzed using UV–VIS spectroscopy. The bandgap energies were determined using Tauc’s plot, showing an increase from 3.61 eV (1% SrO) to 3.76 eV (7% SrO) with increasing SrO content. This variation in bandgap suggests a variation in lattice structure due to SrO incorporation. The gas sensing characteristics were evaluated against H<sub>2</sub>S, NO<sub>2</sub>, CO<sub>2</sub>, NH<sub>3</sub>, CH<sub>4</sub>, and LPG over a 40–200 °C. The sensitivity studies revealed an optimum operating temperature of 120 °C, where the 7% SrO-MgO NCs exhibited the highest sensitivity (~ 83.11%), particularly toward H<sub>2</sub>S gas. The enhanced gas sensing performance was attributed to increased oxygen vacancies, improved charge carrier mobility, and modified surface states induced by SrO doping. The obtained results suggest that SrO-MgO NCs, particularly 7% doping concentration of SrO, have significant potential for applications in toxic gas detection due to their high sensitivity, selectivity, and quick response and recovery time.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"21 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s40712-025-00369-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145983026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of cryogenic soaking and blend ratio on performance of PBT/PC blends: a multi-response study 低温浸泡和共混比例对PBT/PC共混物性能影响的多响应研究
IF 2
International Journal of Mechanical and Materials Engineering Pub Date : 2025-12-15 DOI: 10.1186/s40712-025-00373-x
Prajakta Mane, Ashok J. Keche, Swamini Chopra
{"title":"Effect of cryogenic soaking and blend ratio on performance of PBT/PC blends: a multi-response study","authors":"Prajakta Mane,&nbsp;Ashok J. Keche,&nbsp;Swamini Chopra","doi":"10.1186/s40712-025-00373-x","DOIUrl":"10.1186/s40712-025-00373-x","url":null,"abstract":"<div><p>This research investigates the influence of cryogenic treatment parameters on the mechanical performance of polybutylene terephthalate (PBT) and polycarbonate (PC) blends. Using Grey Relational Analysis (GRA), a multi-response optimization technique, the study explores how varying blend ratios (70/30, 50/50, and 30/70) and cryogenic soaking durations (4–24 h at − 185 °C) affect tensile strength, elongation, impact strength, Shore D hardness, and specific wear rate. Experimental results reveal that each blend ratio responds uniquely to cryogenic treatment, emphasizing the need for parameter-specific optimization. Notably, the 70/30 blend ratio with a 16-h soaking period demonstrated the most balanced enhancement across all properties, as indicated by the highest Grey Relational Grade (GRG). The findings provide critical insights for optimizing the processing of PBT/PC blends in applications demanding high durability, toughness, and wear resistance.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"21 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s40712-025-00373-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145982596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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