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Development of a continuous-flow microfluidic process for microsphere production 微球生产连续流微流控工艺的开发
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-10-02 DOI: 10.1016/j.matlet.2025.139599
Keerthi Renganathan , Ratnesh Jain , Darshan Chheda , Chandrakanth Gadipelly , Ganesh Gaikwad
{"title":"Development of a continuous-flow microfluidic process for microsphere production","authors":"Keerthi Renganathan ,&nbsp;Ratnesh Jain ,&nbsp;Darshan Chheda ,&nbsp;Chandrakanth Gadipelly ,&nbsp;Ganesh Gaikwad","doi":"10.1016/j.matlet.2025.139599","DOIUrl":"10.1016/j.matlet.2025.139599","url":null,"abstract":"<div><div>A continuous-flow microfluidic process was developed to synthesize PLGA microspheres with controlled size and distribution. An automated platform (nanomake-L™) with a split-and-recombine microfluidic chip synthesized microspheres via double-emulsion solvent evaporation, overcoming scalability limitations of droplet-based systems. The device achieved 91.87 % mixing efficiency at 40 mL min<sup>−1</sup> and 99.07 % volume accuracy. A definitive screening design identified solvent, emulsion ratio, and flow rate as the most significant factors. Microspheres sizes ranged from 9.90 to 85.80 μm (average: 46.88 ± 2.2 μm). SEM confirmed smooth, spherical microspheres, with 63.02 ± 3.28 % yield. This study demonstrates continuous microfluidics for automated, high-throughput, and consistent microsphere production, highlighting the platform's potential for scalable pharmaceutical manufacturing.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139599"},"PeriodicalIF":2.7,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227825","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
Graphene-polymer composite for thin-film heating devices 石墨烯-聚合物复合薄膜加热装置
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-10-02 DOI: 10.1016/j.matlet.2025.139600
Artur Rimovich Yakhin , Azat Ravilevich Yusupov , Azat Faatovich Galiev , Anna Vladimirovna Mikhailova , Danfis Danisovich Karamov
{"title":"Graphene-polymer composite for thin-film heating devices","authors":"Artur Rimovich Yakhin ,&nbsp;Azat Ravilevich Yusupov ,&nbsp;Azat Faatovich Galiev ,&nbsp;Anna Vladimirovna Mikhailova ,&nbsp;Danfis Danisovich Karamov","doi":"10.1016/j.matlet.2025.139600","DOIUrl":"10.1016/j.matlet.2025.139600","url":null,"abstract":"<div><div>This study examines thin-film heating devices fabricated from polydiphenylenephthalide (PDPh)-based composites, a thermally and chemically stable polymer, incorporating technical graphene grades RG-S1 and RG-P1. The electrophysical and thermal properties of the composite films were characterized through I-V measurements and real-time infrared thermography. The results demonstrate that both materials provide uniform heating with a temperature variation of no more than 10 °C at low power consumption (0.10 and 0.15 mW/cm<sup>2</sup> to reach 70 °C). The composite with RG-P1 graphene exhibits higher electrical conductivity and heating efficiency but is prone to crack formation under cyclic loading. In contrast, the composite based on fine-dispersed RG-S1 graphene shows enhanced mechanical stability, maintaining structural integrity after multiple thermal cycles. The findings indicate the promising potential of the PDPh/RG-S1 composite for use in flexible, energy-efficient heating devices resistant to long-term operation.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139600"},"PeriodicalIF":2.7,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227823","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
Laser ablation mechanism and parameter effects of SLM-fabricated GH3625 treated by microscale laser shock peening without coating 无涂层微尺度激光冲击强化对slm加工GH3625的激光烧蚀机理及参数影响
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-10-02 DOI: 10.1016/j.matlet.2025.139605
Peiwen Xu , Li Yan , Xiangfan Nie , Fayong Zhong , Shixi Li , Hongbing Li
{"title":"Laser ablation mechanism and parameter effects of SLM-fabricated GH3625 treated by microscale laser shock peening without coating","authors":"Peiwen Xu ,&nbsp;Li Yan ,&nbsp;Xiangfan Nie ,&nbsp;Fayong Zhong ,&nbsp;Shixi Li ,&nbsp;Hongbing Li","doi":"10.1016/j.matlet.2025.139605","DOIUrl":"10.1016/j.matlet.2025.139605","url":null,"abstract":"<div><div>Selective laser melting (SLM) offers great potential for fabricating complex metallic components. However, poor surface integrity limits their practical applications, especially in regions where machining is infeasible. In this work, microscale laser shock peening without coating (μLSPwC) is innovatively applied to improve the surface integrity of SLM-fabricated components. The laser ablation mechanism and parameter effects were investigated. The results indicated that μLSPwC effectively eliminated surface defects, lowering the defect density from 13.25 % to 0.49 % and the surface roughness from 7.75 μm to 6.05 μm. Furthermore, a compressive residual stress (CRS) layer with a depth of 460 μm was introduced, while the hardened layer extended to 270 μm, with the surface microhardness increasing by 39.4 %.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139605"},"PeriodicalIF":2.7,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264027","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
Evading the strength and machinability trade-off in AlN-BN/Mo functionally graded material via reacted phases distribution 通过反应相分布避免AlN-BN/Mo功能梯度材料的强度和可加工性权衡
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-09-30 DOI: 10.1016/j.matlet.2025.139588
Yueqi Wu , Yunzi Li , Mingyong Jia , Qiang Shen , Fei Chen
{"title":"Evading the strength and machinability trade-off in AlN-BN/Mo functionally graded material via reacted phases distribution","authors":"Yueqi Wu ,&nbsp;Yunzi Li ,&nbsp;Mingyong Jia ,&nbsp;Qiang Shen ,&nbsp;Fei Chen","doi":"10.1016/j.matlet.2025.139588","DOIUrl":"10.1016/j.matlet.2025.139588","url":null,"abstract":"<div><div>AlN/Mo composites are promising for aerospace thermal protection systems but suffer from a critical strength-machinability trade-off. This work presents a novel AlN-BN/Mo functionally graded material (FGM) that successfully resolves this conflict. Fabricated via a gradient sintering strategy using Field-Assisted Sintering Technology (FAST), the FGM exhibits an exceptional synergy of properties, achieving an ultrahigh flexural strength of 971.9 MPa alongside excellent machinability. The material's performance originates from a temperature-induced gradient in its microstructure and phase composition. This graded structure features softer, machinable AlN-BN-rich ends supported by a robust, high-strength Mo-rich core. This core's uniform composite microstructure is the primary source of the material's superior strength, offering an effective pathway for developing reliable high-temperature components.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139588"},"PeriodicalIF":2.7,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264116","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
Tailoring microstructures and enhancing mechanical properties of a Mg-Zn-Y-Ca alloy by accumulative roll bonding and annealing 利用累积滚焊和退火技术制备Mg-Zn-Y-Ca合金的显微组织和力学性能
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-09-30 DOI: 10.1016/j.matlet.2025.139590
Zhen-Feng Li , Hai-Long Jia , Ming Yang , De-Qing Ma , Min Zha
{"title":"Tailoring microstructures and enhancing mechanical properties of a Mg-Zn-Y-Ca alloy by accumulative roll bonding and annealing","authors":"Zhen-Feng Li ,&nbsp;Hai-Long Jia ,&nbsp;Ming Yang ,&nbsp;De-Qing Ma ,&nbsp;Min Zha","doi":"10.1016/j.matlet.2025.139590","DOIUrl":"10.1016/j.matlet.2025.139590","url":null,"abstract":"<div><div>The present work demonstrates that accumulative roll bonding (ARB) combined with controlled annealing can achieve an exceptional strength-ductility balance in dilute Mg-Zn-Y-Ca alloys, i.e., a Mg-1.8Zn-0.3Y-0.3Ca (wt%) alloy processed by ARB and subsequent annealing at 300 °C for 10 min develops a unique weak quadruple texture and homogeneous ultrafine-grained microstructure (average grain size: 2.3 μm). It exhibits remarkable mechanical properties with a yield strength of ∼235 MPa and uniform elongation of ∼13 %—representing a significant improvement over conventional low-alloyed Mg<img>Zn alloys. Microstructural analysis reveals that this superior performance stems from the synergistic effects of grain refinement and texture modification.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139590"},"PeriodicalIF":2.7,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264011","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
Lithiophilic Ag@CF current collectors enabling dendrite-free Li deposition 亲锂性Ag@CF集热器,实现无枝晶锂沉积
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-09-30 DOI: 10.1016/j.matlet.2025.139591
Yu Tang , Shipeng Zhang , Xiaorong Lv , Peng Zhang , Bingxin Liu , Li Gao
{"title":"Lithiophilic Ag@CF current collectors enabling dendrite-free Li deposition","authors":"Yu Tang ,&nbsp;Shipeng Zhang ,&nbsp;Xiaorong Lv ,&nbsp;Peng Zhang ,&nbsp;Bingxin Liu ,&nbsp;Li Gao","doi":"10.1016/j.matlet.2025.139591","DOIUrl":"10.1016/j.matlet.2025.139591","url":null,"abstract":"<div><div>Non-uniform lithium deposition behavior drives uncontrolled dendritic growth. This study addresses this by modifying a commercial copper foil current collector with a thin silver layer via a simple displacement reaction. The modified current collector exhibited abundant lithium nucleation sites and high lithiophilicity, ensuring controllable lithium nucleation and deposition. The results show that during the initial nucleation stage, silver reacts with deposited lithium to form a LiAg alloy, which regulates subsequent lithium deposition/dissolution processes. In half-cell tests, the modified anode achieved a Coulombic efficiency of 90.24 % after 160 cycles at 1 mA cm<sup>−2</sup> and 1 mAh cm<sup>−2</sup> and symmetric cells demonstrated stable cycling for over 1200 h under the same conditions. Furthermore, full cells retained capacity retention rate of 96.68 % after 100 cycles. This simple and cost-effective method provides a feasible strategy and valuable insights for the scalable production of functionalized anode current collectors.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139591"},"PeriodicalIF":2.7,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264480","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
Effect of sintering temperature on dielectric constant and electromagnetic shielding of La0.7Ca0.2Sr0.1CrO3 ceramics 烧结温度对La0.7Ca0.2Sr0.1CrO3陶瓷介电常数和电磁屏蔽的影响
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-09-30 DOI: 10.1016/j.matlet.2025.139595
Chenxu Li , Chuanbing Cheng , Yibo Li , Xuwei Bian , Chengshuai Gao , Xiaoran Zhang , Min Chen , Zhihao Wang , Yang Shen , Yao Liu
{"title":"Effect of sintering temperature on dielectric constant and electromagnetic shielding of La0.7Ca0.2Sr0.1CrO3 ceramics","authors":"Chenxu Li ,&nbsp;Chuanbing Cheng ,&nbsp;Yibo Li ,&nbsp;Xuwei Bian ,&nbsp;Chengshuai Gao ,&nbsp;Xiaoran Zhang ,&nbsp;Min Chen ,&nbsp;Zhihao Wang ,&nbsp;Yang Shen ,&nbsp;Yao Liu","doi":"10.1016/j.matlet.2025.139595","DOIUrl":"10.1016/j.matlet.2025.139595","url":null,"abstract":"<div><div>In this paper, the negative permittivity of perovskite-type La<sub>0.7</sub>Ca<sub>0.2</sub>Sr<sub>0.1</sub>CrO<sub>3</sub> ceramics (LCSCOs) was reported for the first time. The effects of sintering temperature on their conductivity, permittivity, and electromagnetic shielding performance were explored. As the sintering temperature increased, the density of the LCSCOs increased. This enlarged the contact area between the grains and optimized the conductive pathways, consequently improving the electrical conductivity. Due to a certain number of free carriers in the LCSCOs, their collective oscillations resulted in negative permittivity. The elevated sintering temperature promoted the solid solubility of dopant atoms in ceramics, which ultimately resulted in an increase in the absolute values of negative permittivity. The Drude model could explain the negative permittivity. As the sintering temperature increased, the electromagnetic shielding performance of the ceramics improved due to the synergistic effect of increased density and conductivity.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139595"},"PeriodicalIF":2.7,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227833","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
Tribological performance of quenched diamond coatings on pure titanium under dry sliding conditions 干滑动条件下纯钛表面淬火金刚石涂层的摩擦学性能
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-09-30 DOI: 10.1016/j.matlet.2025.139592
Mahmoud Talaat Youssef , Mohamed Ragab Diab , Ahmed Hamed Oraby , Tomohiro Yoshida , Tsuyoshi Yoshitake , Abdelrahman Zkria Ahmed
{"title":"Tribological performance of quenched diamond coatings on pure titanium under dry sliding conditions","authors":"Mahmoud Talaat Youssef ,&nbsp;Mohamed Ragab Diab ,&nbsp;Ahmed Hamed Oraby ,&nbsp;Tomohiro Yoshida ,&nbsp;Tsuyoshi Yoshitake ,&nbsp;Abdelrahman Zkria Ahmed","doi":"10.1016/j.matlet.2025.139592","DOIUrl":"10.1016/j.matlet.2025.139592","url":null,"abstract":"<div><div>Titanium's use in demanding tribological applications is limited by its high friction and low wear resistance. This study demonstrates that quenched diamond (Q-dia) coatings, deposited via coaxial arc plasma deposition, substantially improve titanium's performance under dry sliding. The Q-dia coating achieved a low friction coefficient of 0.25 and an exceptionally low wear rate of 4.04 × 10<sup>−6</sup> mm<sup>3</sup>/N·m under dry sliding conditions, representing an 88.3 % improvement in wear resistance at 10 N compared with uncoated pure titanium. These enhancements are attributed to the coating's nanodiamond/amorphous carbon composite structure, which combines high hardness with the formation of a lubricious tribo-film. The results highlight Q-dia coatings as a promising solution for extending titanium's lifespan in high-load, lubrication-free environments.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139592"},"PeriodicalIF":2.7,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227834","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
Shining a light on bael fruit: Developing natural gum-based photocurable hydrogels for bio-therapeutic applications 发光的bael果:开发天然胶基光固化水凝胶的生物治疗应用
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-09-30 DOI: 10.1016/j.matlet.2025.139587
Aditya kadam, Amit Kumar Jaiswal
{"title":"Shining a light on bael fruit: Developing natural gum-based photocurable hydrogels for bio-therapeutic applications","authors":"Aditya kadam,&nbsp;Amit Kumar Jaiswal","doi":"10.1016/j.matlet.2025.139587","DOIUrl":"10.1016/j.matlet.2025.139587","url":null,"abstract":"<div><div>In this study, we report the development of a photocurable hydrogel of <em>Aegle marmelos</em> fruit gum by methacrylate modification for the first time using three different chemicals: 2-Aminoethyl methacrylate (AEMA), glycidyl methacrylate (GMA), and methacrylic anhydride (MA). The modified gum precursors exhibited efficient UV gelation and hydrogel formation within 60 s to 180 s. Moreover, hydrogels exhibited excellent biocompatibility. The approach reported in this study offers a versatile platform for designing biopolymer hydrogels and increasing the utility of underutilized fruit gum for biomedical applications.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139587"},"PeriodicalIF":2.7,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264014","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
Preparation and evaluation of a novel Schiff Base as a green corrosion inhibitor for mild steel in 1 M HCl 新型希夫碱绿色缓蚀剂在1 M盐酸中对低碳钢的制备及评价
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-09-30 DOI: 10.1016/j.matlet.2025.139585
Ruth Caroline Etroubeka, Hanlin Shao, Zhihao Chen, Wenzhong Yang
{"title":"Preparation and evaluation of a novel Schiff Base as a green corrosion inhibitor for mild steel in 1 M HCl","authors":"Ruth Caroline Etroubeka,&nbsp;Hanlin Shao,&nbsp;Zhihao Chen,&nbsp;Wenzhong Yang","doi":"10.1016/j.matlet.2025.139585","DOIUrl":"10.1016/j.matlet.2025.139585","url":null,"abstract":"<div><div>A novel Schiff base, 2-[(4-thiazolylamino) methyl] phenol (TAMP), was synthesized via microwave-assisted condensation of salicylaldehyde and 4-thiazolamine. The compound was characterized spectroscopically and evaluated as a corrosion inhibitor for carbon steel in 1.0 M HCl. Multiple tests were carried out to evaluate the inhibitor's efficacy. Hence, electrochemical and weight loss analyses demonstrated concentration-dependent inhibition efficiency, reaching 77.4 % at 500 mg/L. In addition, SEM confirmed protective film formation via adsorption on the steel surface. Furthermore, theoretical studies (DFT/MD simulations) elucidated the adsorption mechanism at the metal/electrolyte interface, revealing synergistic protonation and planar orientation as key factors enabling high surface coverage (89 %) and charge transfer.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139585"},"PeriodicalIF":2.7,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227832","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
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