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Porous FeAl alloys via powder sintering:Phase transformation,microstructure and aqueous corrosion behavior

Journal of materials science & Technology 2021年第27期86卷 64-69页

作者： Gang Chen Klaus-Dieter Liss Chao Chen Yuehui He Xuanhui Qu Peng Cao Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083PR China Materials and Engineering Science Program Guangdong Technion-Israel Institute of TechnologyShantouGuangdong515063PR China Technion-Israel Institute of Technology Haifa32000Israel School of Mechanical MaterialsMechatronic and Biomedical EngineeringFaculty of Engineering&Information SciencesUniversity of WollongongWollongongNSW2522Australia State Key Laboratory for Powder Metallurgy Central South UniversityChangsha410083PR China Department of Chemical and Materials Engineering The University of AucklandPrivate Bag 92019Auckland1142New Zealand MacDiarmid Institute of Advanced Materials and Nanotechnology Victoria University of WellingtonPO Box 600Wellington6140New Zealand

This study investigates the phase transformation and microstructure of porous Fe Al parts sintered from elemental powder mixtures using in-situ neutron diffraction and in-situ thermal dilatometry.A single B2 structured Fe Al phase was determined in the sintered Fe Al *** combined effects of the Kirkendall porosity,transient liquid phase,and phase transformations associated with powder sintering all contribute to the swelling phenomenon of the final sintered *** aqueous corrosion test indicates that the corrosion products include iron oxides in the porous Fe Al *** accumulation of corrosion products blocks the pore channel and decreases pore size and permeability over the soaking time.

关键词： Powder sintering Intermetallic Porous Corrosion Neutron diffraction

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Effect of double coating on microencapsulation of levofloxacin using the particles from gas-saturated solutions process as a controlled-release system

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Discover Chemistry 2025年第1期2卷 1-13页

作者： Sharmin, Tanjina Takeshita, Toshihiro Ouchi, Mikio Yoshida, Koji Znad, Hussein Saptoro, Agus Sarker, Zaidul Islam Irie, Keiichi Satho, Tomomitsu Nioh, Atsushi Masuda, Takaaki Muneyoshi, Yuuki Terayama, Suzuko Mishima, Kenji Department of Chemical Engineering Faculty of Engineering Fukuoka University Fukuoka Japan Research Institute of Composite Materials Fukuoka University Fukuoka Japan Resource Circulation Faculty of Environmental Engineering Fukuoka University Fukuoka Japan Faculty of Sciences Fukuoka University Fukuoka Japan Western Australian School of Mines: Minerals Energy and Chemical Engineering Faculty of Science and Engineering Curtin University Perth Australia Department of Chemical Engineering Faculty of Engineering Curtin Malaysia Graduate School Miri Sarawak Malaysia Department of State Program and Food Science Northern Marianas College Saipan USA Faculty of Pharmaceutical Sciences Fukuoka University Fukuoka Japan Yokohama Research Center Pola Chemical Industries Yokohama Japan

A novel double-coating technique was employed to encapsulate levofloxacin (LVF), a potent antibacterial drug, using the particles from gas-saturated solutions (PGSS) process to achieve extended release. The primary coating utilized glyceryl tristearate (GT), a lipid with a high melting point (72 °C), followed by a secondary coating with trimyristin (TM), a lipid with a lower melting point (52 °C). For comparison, a single-coating approach was also explored, using the biocompatible polymer poly-(ε-caprolactone) (PCL). The resulting particles were characterized for their shape, size, and LVF encapsulation efficiency, with confirmation of LVF entrapment provided by Fourier transform infrared (FTIR) spectroscopy, and X‐ray powder diffraction (XRD) analysis. The particles, with an average diameter of 95.3 ± 16.5 μm, exhibited an encapsulation efficiency of up to 92.1 ± 2.5%. Furthermore, in vitro release studies revealed that the double-coated microcapsules effectively suppressed the initial burst release and provided controlled, extended release of LVF (t30D = 36.3%), demonstrating the efficiency of this encapsulation method for prolonged drug delivery.

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A review on material extrusion additive manufacturing of polycarbonate-based blends and composites: Process-structure–property relationships

SPE Polymers

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SPE Polymers 2025年第2期6卷

作者： Rashidi Mehrabadi, Nima Pircheraghi, Gholamreza Ghasemkhani, Ali Hosseinpour Sanati, Parsa Shahidizadeh, Alireza Kaviani, Alireza Sinha Ray, Suprakas Polymeric Materials Research Group (PMRG) Department of Materials Science and Engineering Sharif University of Technology Tehran Iran Ceramic and Nanomaterials Research Laboratory Department of Materials Science and Engineering Sharif University of Technology Tehran Iran Centre for Nanostructures and Advanced Materials DSI-CSIR Nanotechnology Innovation Centre Council for Scientific and Industrial Research CSIR Pretoria South Africa Department of Chemical Sciences University of Johannesburg Johannesburg South Africa

Polycarbonate (PC) is a valuable engineering polymer with numerous technical characteristics like desirable mechanical properties, high heat resistance, chemical resistance, optical clarity, and electrical insulation capabilities. Therefore, it finds extensive use in aerospace, automotive, consumer goods, optics, medical devices, and electronics. materials extrusion additive manufacturing offers several advantages, such as customized geometry, minimal material waste, cost-effectiveness, and ease of material modification. Accordingly, PC has recently emerged as a robust and durable additive manufacturing material. This review aims to investigate how printing parameters in materials extrusion additive manufacturing affect the properties of PC and PC-based materials, with a specific emphasis on mechanical properties. The main drawbacks associated with pure PC filaments, like high print temperatures, warping tendencies, and a propensity to retract during printing, are also discussed. Considering the significant demand for developing PC blends and composites tailored for application in material-extrusion additive manufacturing, the influence of different types of fillers, including polymeric, metallic, and ceramic, on improving the mechanical behavior is then reviewed. This paper explores the diverse applications of additively manufactured PC parts, especially within advanced areas like aerospace, electrical engineering, and medicine. Lastly, prospects and challenges are presented in the review. Highlights: PC is a key engineering polymer for extrusion 3D printing. Printing parameters affect the quality and strength of polycarbonate parts. Various fillers adjust polycarbonate-based composites' mechanical properties. High temperatures, warping, and retraction are major 3D printing challenges. 3D-printed PC composites can be used in a variety of applications. © 2025 The Author(s). SPE Polymers published by Wiley Periodicals LLC on behalf of Society of Plastics Engineers.

关键词： additive manufacturing material extrusion mechanical properties polycarbonate process parameters

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Ytterbium Femtosecond Fiber Laser Ablation Synthesis of Silicon Nanocrystals in Water: Laser Frequency and Pulse Energy Dependence

SSRN

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SSRN 2023年

作者： Piatkowski, Piotr A. Ali, Asghar Ialyshev, Vadim Iqbal, Mazhar Alnaser, Ali S. Department of Physics American University of Sharjah Materials Science and Engineering Program College of Arts and Sciences PO Box 26666 Sharjah United Arab Emirates

The utilization of femtosecond laser pulses in synthesizing silicon nanocrystals (SiNCs) poses great potential in producing stable nanostructures with chemically pure surfaces and easy-to- manipulate optical properties. In this work, we present an approach that enhances the production and optical quality of surfactant-free SiNCs synthesized in water by ablating silicon wafer with ytterbium fiber femtosecond laser operating at different pulse energies and repetition rates. By further post-synthesis laser treatment of SiNCs suspensions, fragmentation of larger aggregates is observed leading to absorption broadening and absorption-band blueshift. Furthermore, the increase in the repetition rate, from 1 to 500 kHz, of laser pulses having energies of 20 and 240 mJ leads to a decrease in the Si wafer ablation efficiency from 35 to 1.15 pg/pulse;and from 440 to 5.2 pg/pulse, respectively. Using laser pulses with energy of 240 mJ and a repetition rate of 50 kHz results in maximum SiNCs productivity of 33 mg/h. The dependence of the nanostructures’s size and ablation efficiency on the pulse energy and repetition rate is attributed to thermal effects on the Si/water interface and within the water layer illuminated by the strong laser radiation. © 2023, The Authors. All rights reserved.

关键词： Femtosecond lasers

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Tailoring Mesoporous and Macroporous Structures in Activated Carbon from Naoh-Pretreated Oak for Superior Supercapacitors

SSRN

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SSRN 2024年

作者： Lim, Mu-Seong Kang, Seo Hui Song, Dae-Yeon Chae, Ji Su Lee, Jae-Won Lee, Younki Roh, Kwang Chul Energy Storage Materials Center Korea Institute of Ceramic Engineering and Technology Gyeongsangnam‑do Jinju-Si52851 Korea Republic of Department of Materials Engineering and Convergence Technology Gyeongsang National University 501 Jinju-daero Gyeongsangnam-do Jinju-Si52828 Korea Republic of Department of Materials Science and Engineering Korea University Anam-Dong Seongbuk-Gu Seoul136-713 Korea Republic of Department of Wood Science and Engineering College of Agriculture and Life Sciences Chonnam National University Gwangju61186 Korea Republic of Interdisciplinary Program in IT-Bio Convergence System Chonnam National University Gwangju61186 Korea Republic of

The growing need for sustainable and efficient energy storage solutions has intensified research efforts into eco-friendly materials such as activated carbon (AC) derived from lignocellulosic biomass. Herein, we present a method to enhance the physical characteristics of AC from oak via NaOH pretreatment. The NaOH-pretreated oak was converted into AC through carbonization and chemical activation using KOH as the activating agent. The AC tended to develop mesopores (2–50 nm) and macropores (> 50 nm) as the pretreatment ratio increased (0%, 1%, 2%, and 8%), achieving a specific surface area of up to 2706 m2 g–1 and a pore volume of up to 1.97 cm3 g–1. This result is due to the transformation of the structure of lignocellulosic biomass into a more advantageous structure for pore development through the reactions of delignification and deacetylation that occur during NaOH pretreatment. The mesoporous and macroporous structures offer efficient ion diffusion pathways and reduce resistance, which leads to superior rate capability, capacity retention, and a gravimetric specific capacitance of 44.5 F g–1 at a current density of 1 mA cm–2 in supercapacitors. These results underscore the potential of NaOH-pretreated oak as a sustainable and effective precursor for high-performance AC in energy storage applications, offering new insights into the optimization of material properties for supercapacitors. © 2024, The Authors. All rights reserved.

关键词： Lignocellulose

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Biomimetic natural biomaterials for tissue engineering and regenerative medicine:new biosynthesis methods,recent advances,and emerging applications

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Military Medical Research 2024年第1期11卷 50-79页

作者： Shuai Liu Jiang-Ming Yu Yan-Chang Gan Xiao-Zhong Qiu Zhe-Chen Gao Huan Wang Shi-Xuan Chen Yuan Xiong Guo-Hui Liu Si-En Lin Alec McCarthy Johnson V.John Dai-Xu Wei Hong-Hao Hou Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering the Fifth Affiliated HospitalSchool of Basic Medical ScienceSouthern Medical UniversityGuangzhou 510900China Department of Orthopedics Tongren HospitalShanghai Jiao Tong UniversityShanghai 200336China The Eighth Affiliated Hospital Sun Yat-Sen UniversityShenzhen 518033GuangdongChina Engineering Research Center of Clinical Functional Materials and Diagnosis&Treatment Devices of Zhejiang Province Wenzhou InstituteUniversity of Chinese Academy of SciencesWenzhou 325011ZhejiangChina Department of Orthopedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of Orthopaedics and Traumatology Faculty of Medicinethe Chinese University of Hong KongHong Kong SAR 999077China Department of Functional Materials Terasaki Institute for Biomedical InnovationLos AngelesCA 90064USA Mary&Dick Holland Regenerative Medicine Program College of MedicineUniversity of Nebraska Medical CenterOmahaNE 68130USA Zigong Affiliated Hospital of Southwest Medical University Zigong Psychiatric Research CenterZigong Institute of Brain ScienceZigong 643002SichuanChina Key Laboratory of Resource Biology and Biotechnology in Western China Ministry of EducationSchool of MedicineDepartment of Life Sciences and MedicineNorthwest UniversityXi’an 710127China

Biomimetic materials have emerged as attractive and competitive alternatives for tissue engineering(TE)and regenerative *** contrast to conventional biomaterials or synthetic materials,biomimetic scaffolds based on natural biomaterial can offer cells a broad spectrum of biochemical and biophysical cues that mimic the in vivo extracellular matrix(ECM).Additionally,such materials have mechanical adaptability,micro-structure interconnectivity,and inherent bioactivity,making them ideal for the design of living implants for specific applications in TE and regenerative *** paper provides an overview for recent progress of biomimetic natural biomaterials(BNBMs),including advances in their preparation,functionality,potential applications and future *** highlight recent advances in the fabrication of BNBMs and outline general strategies for functionalizing and tailoring the BNBMs with various biological and physicochemical characteristics of native ***,we offer an overview of recent key advances in the functionalization and applications of versatile BNBMs for TE ***,we conclude by offering our perspective on open challenges and future developments in this rapidly-evolving field.

关键词： Biomimic Scaffold Biosynthesis Natural biomaterial Tissue engineering

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Optimizing cultivation strategies and scaling up for fucoxanthin production using Pavlova sp.

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Bioresource Technology 2024年 399卷 130609页

作者： Chen, Chun-Yen Liu, Ping-Yung Chang, Yu-Han Nagarajan, Dillirani Latagan, Mary Joy D. de Luna, Mark Daniel G. Chen, Jih-Heng Chang, Jo-Shu University Center for Bioscience and Biotechnology National Cheng Kung University Tainan Taiwan Department of Biotechnology and Bioindustry Sciences National Cheng Kung University Tainan701 Taiwan Department of Chemical Engineering National Cheng Kung University Tainan Taiwan Institute of Aquatic Science and Technology College of Hydrosphere Science National Kaohsiung University of Science and Technology Nanzih Campus Kaohsiung City Taiwan Energy Engineering Program National Graduate School of Engineering University of the Philippines Diliman Quezon City1101 Philippines Environmental Engineering Program National Graduate School of Engineering University of the Philippines Quezon City Diliman1101 Philippines Department of Chemical Engineering University of the Philippines Diliman Quezon City1101 Philippines Department of Chemical and Materials Engineering National Kaohsiung University of Science and Technology Kaohsiung807 Taiwan Department of Chemical and Materials Engineering Tunghai University Taichung407 Taiwan Research Center for Smart Sustainable Circular Economy Tunghai University Taichung407 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Chung-Li Taiwan

The microalgal-based production of fucoxanthin has emerged as an imperative research endeavor due to its antioxidant, and anticancer properties. In this study, three brown marine microalgae, namely Skeletonema costatum, Chaetoceros gracilis, and Pavlova sp., were screened for fucoxanthin production. All strains displayed promising results, with Pavlova sp. exhibiting the highest fucoxanthin content (27.91 mg/g) and productivity (1.16 mg/L·day). Moreover, the influence of various cultivation parameters, such as culture media, salinity, sodium nitrate concentration, inoculum size, light intensity, and iron concentration, were investigated and optimized, resulting in a maximum fucoxanthin productivity of 7.89 mg/L·day. The investigation was further expanded to large-scale outdoor cultivation using 50 L tubular photobioreactors, illustrating the potential of Pavlova sp. and the cultivation process for future commercialization. The biomass and fucoxanthin productivity for the large-scale cultivation were 70.7 mg/L·day and 4.78 mg/L·day, respectively. Overall, the findings demonstrated considerable opportunities for fucoxanthin synthesis via microalgae cultivation and processing. © 2024 Elsevier Ltd

关键词： Microalgae

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Uncertainty Quantification and Propagation for Multiscale materials Systems with Agglomeration and Structural Anomalies

SSRN

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SSRN 2024年

作者： Comlek, Yigitcan Mojumder, Satyajit van Beek, Anton Prabhune, Prajakta Ciampaglia, Alberto Apley, Daniel W. Brinson, L. Catherine Liu, Wing Kam Chen, Wei Department of Mechanical Engineering Northwestern University Evanston United States Theoretical and Applied Mechanics Program Northwestern University Evanston United States School of Mechanical and Materials Engineering University College Dublin Dublin Ireland Thomas Lord Department of Mechanical Engineering and Materials Science Duke University Durham United States Department of Mechanical and Aerospace Engineering Politecnico di Torino Turin Italy Department of Industrial Engineering and Management Sciences Northwestern University Evanston United States

Advancements in manufacturing technologies have enabled material system design optimization at multiple length scales. However, the microstructural anomalies and uncertainties present at each scale have not been considered comprehensively enough for systems to be robust to manufacturing variations. Consequently, considering anomalies at various length scales of the material’s structure and understanding their effects on a part’s response are crucial for designing engineered parts that are robust to various sources of uncertainty. In this work, an efficient bottom-up hierarchical uncertainty quantification and propagation framework bridging multiple scales to establish a design allowable range for the material system at the part-scale is presented. We demonstrate our framework on an additively manufactured polymer nanocomposite material system that is subject to anomalies at different length scales that impact the material properties. Specifically, agglomeration defects formed due to attractive forces between nanoparticles at the microscale and structural variabilities caused by the voids resulting from different processing conditions at the mesoscale are considered. The introduced hierarchical sampling framework combines (i) an innovative microstructure image characterization and reconstruction, (ii) a mechanistic reduced-order model that enables fast property predictions for high-dimensional microstructural design spaces, and (iii) efficient uncertainty quantification and propagation through Copula-based sampling across multiple length scales to reduce the sampling budget by 95%. Through validation of our method, we demonstrate the importance of considering the effects of process-induced microstructure features on the performance of a part. © 2024, The Authors. All rights reserved.

关键词： Microstructure

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Enhancing the Properties of Polyester Composites Using Unidirectional Acetylated Fibers from Luffa Cylindrica

Enhancing the Properties of Polyester Composites Using Unidi...

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Symposium on Natural Fibers and Biocomposites: A Sustainable Solution, 2025, held as part of the TMS Annual Meeting and Exhibition, TMS 2025

作者： de Melo, Eduarda C. R. Amaral, Heliane R. dos Silva, Roseméri B. S. Cândido, Verônica S. Lopes, Felipe P. D. Monteiro, Sergio N. Oliveira, Michel P. Forest and Wood Sciences Department Federal University of Espírito Santo Jeronimo Monteiro Vitória29550-000 Brazil Laboratory of Carbon and Ceramic Materials Department of Physics Federal University of Espírito Santo ES Vitória29075-910 Brazil Engineering of Natural Resources of the Amazon Program Federal University of Para PA Belem67030-007 Brazil Rio de Janeiro22290-270 Brazil Advanced Materials Laboratory State University of the North of Rio de Janeiro Darcy Ribeiro—UENF Av Alberto Lamego 2000 CEP 28013-602 RJ Campos dos Goytacazes Brazil

ISBN: (纸本)9783031811890

Polymeric compositesComposite reinforced by lignocellulosic fibersLignocellulosic fibers are an eco-friendly option for various applications that utilize the benefits of natural fibersNatural fibers and polymersPolymers to create materials with improved mechanical propertiesMechanical property and minimal environmental impactImpact. In this study, we acetylated unidirectional fibers from Luffa cylindrica and incorporated them into a polyester matrix. X-ray diffraction and Fourier-transform infrared spectroscopy analyses confirmed the success of the acetylation process, replacing hydroxyl groups with acetyl groups. Moreover, thermal analysis showed that the acetylated fibers had no mass loss up to 200 °C, indicating their hydrophobic nature. Scanning electron microscopy displayed an excellent interface between the acetylated fibers and the polymeric matrix. The Charpy impactImpact resistance for the acetylated fibers showed a remarkable 1865% increase compared to pure polyester. Additionally, the compositeComposite with acetylated fibers absorbed only 2.54% of water. These results demonstrate that lignocellulosic fibersLignocellulosic fibers’ in situ acetylation process offers a more sustainable alternative to synthetic fibers. © The Minerals, Metals & materials Society 2025.

关键词： Natural fibers

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X-photon 3D lithography by fs-oscillators:wavelength-independent and photoinitiator-free

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Light(Advanced Manufacturing) 2024年第4期5卷 89-101页

作者： Dimitra Ladika Antanas Butkus Vasileia Melissinaki Edvinas Skliutas Elmina Kabouraki Saulius Juodkazis Maria Farsari Mangirdas Malinauskas Institute of Electronic Structure and Laser Foundation for Research and Technology-Hellas70013 HeraklionGreece Department of Materials Science and Technology University of Crete70013HeraklionCrete Laser Research Center Faculty of PhysicsVilnius UniversitySaulėtekio Ave.10LT-10223 VilniusLithuania Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials(SEAM) School of ScienceSwinburne University of TechnologyMelbourneAustralia WRH Program International Research Frontiers Initiative(IRFI)Tokyo Institute of Technology Nagatsuta-choMidori-kuYokohamaJapan

Laser direct writing employing multi-photon 3D polymerisation is a scientific and industrial tool used in various fields such as micro-optics,medicine,metamaterials,programmable materials,etc.,due to the fusion of highthroughput and fine features down to hundreds of *** limitations of technology applicability emerge from photo-resin properties,however any material modifications can strongly affect its printability,as photoexcitation conditions alter as *** we present wavelength-independent 3D polymerisation using low peak power laser *** pulse repetition rate and fast laser direct writing was employed for advancing additive manufacturing out of the SZ2080^(TM)photo-resist without any *** of 517 nm,780 nm,and 1035 nm are shown to be suitable for producing 300 nm polymerized features even at high-up to 10^(5)μm/s-writing *** of organic-inorganic ratio in hybrid material results in shift and decrease of the dynamic fabrication window,yet not prohibiting the *** energy deposition per focal volume is achieved due to localized heating enabling efficient 3D *** spatio-selective photo-chemical crosslinking widens optical manufacturing capacity of non-photo-sensitive materials.

关键词： 3D polymerisation Nonlinear absorption Multi-photon absorption Laser direct writing Additive manufacturing Material engineering Organic-inorganic polymers SZ2080^(TM) Photosensitizer

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