Article
Polymer Science
Xinying Deng, Ming Shun Hoo, Yi Wen Cheah, Le Quan Ngoc Tran
Summary: This study investigated the processing and modification methods of basalt fiber-reinforced thermoplastic composites to improve their mechanical properties. Optimized material preparation and processing steps improved the impregnation and mechanical properties of the fibers. The use of a compatibilizer significantly enhanced the strength of the short fiber composites.
Article
Nanoscience & Nanotechnology
Joshua M. Kubiak, Buxuan Li, Mathew Suazo, Robert J. Macfarlane
Summary: The distribution of filler particles within a polymer matrix nanocomposite significantly affects its properties and processability. This study presents a strategy for preparing functional composites with enhanced thermal conductivity. The thermal cross-linking of self-suspended polymer grafted nanoparticles is used to achieve homogeneously dispersed, non-percolating alumina particles in an organic matrix.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Multidisciplinary
Tielong Han, Chao Hou, Zhi Zhao, Xintao Huang, Fawei Tang, Yurong Li, Xiaoyan Song
Summary: This study achieved improved copper connectivity and uniformly dispersed ultrafine tungsten particles in ultrafine grained (UFG) W-Cu composites. The as-prepared UFG W-Cu composites showed enhanced combination of hardness, compressive strength and electrical conductivity compared with previous reports. The strengthening mechanisms of the presented W-Cu composites were quantitatively discussed.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Ceramics
Weiwei Zhang, Shibo Li, Shuang Wu, Boxiang Yao, Shukai Fan, Guoping Bei, Wenbo Yu, Yang Zhou, Ying Wu, Sun-An Ding
Summary: Novel MoAlB composites reinforced with SiC have been prepared and characterized. The 5 vol% SiC/MoAlB composite exhibited improved mechanical properties and enhanced oxidation resistance. The formation of a dense and continuous scale composed of Al2O3 and SiO2 contributed to the improved oxidation resistance.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Materials Science, Composites
Behzad Nateq, Mohsen Haddad-Sabzevar, Seyyed Abdolkarim Sajjadi, Farhad Saba, Faraz Deirmina, Massimo Pellizzari
Summary: The study presented a powder processing technique for fabricating a heterogeneous AlSi10Mg matrix reinforced by CNTs with enhanced comprehensive mechanical properties. By utilizing non-homogeneous dispersion of CNTs, the composite demonstrated improved strength and ductility.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Mohammad Reza Akbarpour, Homayoun Mousa Mirabad, Farid Gazani, Iman Khezri, Amirhossein Ahmadi Chadegani, Ali Moeini, Hyoung Seop Kim
Summary: This article discusses the manufacturing methods and microstructural characteristics of Cu-SiC metal matrix composites to explore their potential for thermal management applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Lili Chen, Yushi Qi, Yanhan Fei, Zhiming Du
Summary: The in situ fabrication of SiC nanorods successfully enhanced the Al2024 composite reinforced with graphene nanoplatelets (GNPs), resulting in significantly improved mechanical properties and thermal conductivity. The addition of 1.0 wt% GNPs led to a maximum tensile strength of 589 MPa and a hardness of 193 HV. With a SiC-GNPs content of 1.5 wt%, the composite displayed a greatly enhanced thermal conductivity of 224 W m(-1)K(-1), which was 115% higher than that of Al2024.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Yu-Cai Wu, Xi -Chun Zhong, Yuan-Xin Li, Xuan Huang, Jiao-Hong Huang, Cui-Lan Liu, Zhong-Wu Liu, Wan-Qi Qiu, Ming -Long Zhong, Zhen-Chen Zhong, R. V. Ramanujan
Summary: LaFe11.8Si1.2/16wt%La65Co35 samples were prepared by spark plasma sintering (SPS) and subsequent annealing. The La65Co35 binder increased the 1:13 phase content, and the alpha-Fe phase formed and disappeared during annealing. The sample annealed for 0.5 h showed a distinct core-shell structure, desirable table-like (-Delta S-M) -T curve, and higher RC value. The diffusion of Co was hindered by the growth of La5Si3 phase. Samples annealed for 24 h achieved larger (-Delta S-M)(max) and (sigma(bc))(max) values. The method combining SPS and diffusion annealing is promising for preparing La-Fe-Si based magnetocaloric composites with good properties.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Engineering, Multidisciplinary
Zhiming Zhang, Genlian Fan, Zhanqiu Tan, Haitao Zhao, Yanjin Xu, Dingbang Xiong, Zhiqiang Li
Summary: The bioinspired multiscale Al2O3-rGO/Al laminated composite, prepared by adding hierarchically aligned Al2O3 and rGO nanosheets into Al matrix, shows a synergistic strengthening effect and additional strengthening mechanism attributed to enhanced load transfer due to good bonding at Al2O3/rGO/Al interface. It presents a new strategy for developing advanced composites with simultaneous enhancement of the modulus-strength-ductility.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Polymer Science
Weerawut Naebpetch, Sutiwat Thumrat, Indriasari, Yeampon Nakaramontri, Suppachai Sattayanurak
Summary: This study found that glycerol can effectively replace mineral oil in natural rubber composites, providing suitable properties in terms of cure characteristics, mechanical properties, and thermal stability. Compared to other oils, glycerol exhibited superior maximum torque and torque differences, as well as shorter scorch time, cure time, and a higher cure rate index. Although the mechanical properties of the vulcanized rubber using glycerol showed slightly lower values than the others, the composites filled with glycerol had better values for 100% and 300% moduli, as well as hardness. This suggests that glycerol presents a good balance of properties, making it a beneficial substitute for mineral oil in tire, shoe sole, and rubber stopper applications.
Article
Engineering, Multidisciplinary
Xiao-long Ma, Li -hua Wen, Jin-you Xiao, Wen-hao Li, Xiao Hou, Shi-Yu Wang
Summary: High-performance thermoplastic composites have emerged as important structural materials in aerospace and defense applications. However, understanding the impact of processing parameters on mechanical properties in the manufacturing process of these composites remains a challenge. This study investigates the relationships between processing, crystallization, and properties of continuous carbon fiber reinforced polyether-ether-ketone composites. Experimental results show that the composite's mechanical performance and crystallization properties are significantly influenced by processing parameters. Increasing molding temperature, pressure, and holding time improve fiber/matrix infiltration and affect the crystallinity and crystalline morphology of the matrix, ultimately impacting the composites' mechanical properties.
DEFENCE TECHNOLOGY
(2023)
Review
Engineering, Multidisciplinary
Masoud Yaghobian, Gareth Whittleston
Summary: This paper provides a comprehensive review of commonly used carbon nanomaterials in cementitious composites, focusing on their effects on mechanical properties. The study finds that dispersion methods and techniques significantly influence both the mechanical properties and the percentage of nanomaterials in the mixes. Recommendations include the use of low percentages of graphene oxide for improvement, the use of superplasticisers and ultrasonication for better dispersion, and a mixed mode approach to measuring dispersion.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Computer Science, Interdisciplinary Applications
Bekir Comak, Batuhan Aykanat, Ozlem Salli Bideci, Alper Bideci
Summary: With advancements in computer technologies, image processing techniques have become increasingly utilized in various industries. This study focuses on the use of image processing techniques to analyze the physical and mechanical characteristics of cementitious composites and evaluate their homogeneity. The findings demonstrate that the addition of GGBFS and SBR enhances the adhesion and homogeneity of the composites.
COMPUTERS AND CONCRETE
(2022)
Article
Materials Science, Multidisciplinary
Qianhao Zang, Hongmei Chen, Jing Zhang, Ling Wang, Shujin Chen, Yunxue Jin
Summary: The study fabricated graphene nano-platelets (GNPs) reinforced AZ31 alloy composites through friction stir processing, with observed uniform dispersion of GNPs in the composites. After three cumulative FSP passes, the hardness and tensile properties were enhanced, and the corrosion resistance was improved with increasing the volume fraction of GNPs.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Jaroslaw Wozniak, Mateusz Petrus, Tomasz Cygan, Boguslawa Adamczyk-Cieslak, Dorota Moszczynska, Andrzej Roman Olszyna
Summary: The article presents the process of synthesizing Ti3SiC2 powder and investigates the influence of molar ratio and carbon forms on the phase composition of the powders. The synthesis was conducted using a spark plasma sintering (SPS) furnace. Additionally, composites reinforced with SiC particles were produced using the synthesized powders. The results showed that the carbon form had no effect on the purity of the powders, while annealing significantly affected their purity.
Article
Nanoscience & Nanotechnology
Tatsuya Muramatsu, Shohei Shimizu, Jessica M. Clough, Christoph Weder, Yoshimitsu Sagara
Summary: This study presents a new approach to design mechanoresponsive reporter molecules based on rotaxanes. The fluorescence resonance energy transfer (FRET) between a donor and an acceptor is mechanically controlled in this system. Stretchable hydrogels containing the mechanophore showed a higher switching contrast in fluorescence compared to dry films due to increased molecular mobility and hydrophobic effects.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Youwei Ma, Xuesong Jiang, Jie Yin, Christoph Weder, Jose Augusto Berrocal, Zixing Shi
Summary: Chemical upcycling of polymers has become an emerging strategy to convert post-consumer waste into valuable chemicals and materials. However, due to the high stability of the chemical bonds in many polymers, their chemical modification is often challenging. In this study, a versatile approach for the upcycling of linear and cross-linked polyureas was developed using acetylacetone. The resulting compounds can be reacted with aromatic isocyanates to form highly dynamic aminoketoenamide bonds, enabling the preparation of healable and reprocessable poly(aminoketoenamide) networks through thermal treatment without any catalyst.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemistry & Molecular Biology
Jonas Simon, Lukas Fliri, Janak Sapkota, Matti Ristolainen, Stephen A. Miller, Michael Hummel, Thomas Rosenau, Antje Potthast
Summary: The reductive amination of dialdehyde cellulose (DAC) with 2-picoline borane was investigated for its potential in producing bioderived thermoplastics. The effects of different side chains on the reaction were examined using microcrystalline cellulose as a model compound. The obtained insights were then applied to study the thermal properties of high-molecular-weight thermoplastics generated from 39%-oxidized softwood kraft pulp.
Article
Chemistry, Multidisciplinary
Andrea Dodero, Kenza Djeghdi, Viola Bauernfeind, Martino Airoldi, Bodo D. D. Wilts, Christoph Weder, Ullrich Steiner, Ilja Gunkel
Summary: This paper presents a promising approach to create color through photonic morphologies manufactured by molecular self-assembly. It demonstrates the feasibility of achieving full-color tuning in photonic spheres across the visible spectrum. The study establishes important principles for manufacturing photonic colloids through the control of lamellar thickness and selection of swelling additives.
Review
Materials Science, Composites
Dinesh Rokaya, Hans Erling Skallevold, Viritpon Srimaneepong, Anand Marya, Pravin Kumar Shah, Zohaib Khurshid, Muhammad Sohail Zafar, Janak Sapkota
Summary: Shape memory polymers (SMPs) are smart materials that can change and revert to their permanent shape upon external stimulus. They can be divided into four types based on their permanent shape, elasticity origin, and temporary shape fixing mechanism. Recent developments have shown the wide applicability of SMPs in various biomedical applications. This comprehensive analysis discusses the types, mechanisms, functionalities, and biomedical applications of SMPs, as well as their future advancement in the biomedical field.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Livius F. F. Muff, Austin S. S. Mills, Shane Riddle, Veronique Buclin, Anita Roulin, Hillel J. J. Chiel, Roger D. D. Quinn, Christoph Weder, Kathryn A. A. Daltorio
Summary: A mechanically compliant worm-like robot with a fully modular body based on soft polymers is reported. The robot consists of strategically assembled, electrothermally activated polymer bilayer actuators, enabling it to move through repeatable peristaltic locomotion on slippery or sticky surfaces and be oriented in any direction. The soft body allows the robot to wriggle through openings and tunnels much smaller than its cross-section.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jess M. Clough, Cedric Kilchoer, Bodo D. Wilts, Christoph Weder
Summary: This paper reports a new type of mechanochromic material that overcomes the limitations of traditional mechanochromic polymers by combining photonic structures with covalent mechanophores. These materials can change their reflection spectra upon deformation and provide quantitative detection of the range of changes, with a broad strain detection range.
Article
Chemistry, Multidisciplinary
Viola V. Vogler-Neuling, Matthias Saba, Ilja Gunkel, Justin O. Zoppe, Ullrich Steiner, Bodo D. Wilts, Andrea Dodero
Summary: This article reviews biological photonic structures and their characterization techniques, focusing on those structures not yet artificially manufactured. Then, employed and potential nanofabrication strategies for biomimetic, bio-templated, and artificially created biopolymeric photonic structures are discussed. The discussion is extended to responsive biopolymer photonic structures and hybrid structures. Last, future fundamental physics, chemistry, and nanotechnology challenges related to biopolymer photonics are foreseen.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Derek J. Kiebala, Robert Style, Dimitri Vanhecke, Celine Calvino, Christoph Weder, Stephen Schrettl
Summary: Blending polymers with telechelic macromolecules that have excimer-forming chromophores as end-groups creates materials with sensitive and reversible mechanochromic response to strain. Confocal microscopy reveals phase-separated inclusions of the additive in various host polymers. The mechanochromism of the blends arises from the distortion of the inclusions, which deform homogeneously and reversibly in response to macroscopic strain, regardless of the additive content and matrix composition. These findings demonstrate the potential of using telechelic macromolecules as universal additives for the fabrication of mechanochromic materials.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jonas Simon, Inge Schlapp-Hackl, Janak Sapkota, Matti Ristolainen, Thomas Rosenau, Antje Potthast
Summary: In this study, the glass transition temperature (Tg) of dialdehyde cellulose derivatives was successfully tailored by adjusting the degree of oxidation and introducing different side chains, providing a strategy for developing sustainable thermoplastics.
Article
Engineering, Environmental
Livius F. Muff, Sandor Balog, Jozef Adamcik, Christoph Weder, Roman Lehner
Summary: Research on polymer nanoparticles in the environment and their impact on animal and human health is growing. This study presents a method to prepare well-defined nanoparticles with tailored characteristics, allowing for their detection in complex environments and mimicking environmentally relevant morphologies.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Cristina Prado-Martinez, Preston Sutton, Isabella Mombrini, Aristotelis Kamtsikakis, Worarin Meesorn, Christoph Weder, Ullrich Steiner, Ilja Gunkel
Summary: Replacing liquid electrolytes with solid polymer electrolytes in lithium-based batteries can inhibit dendritic growth, but it often compromises the efficiency of lithium-ion transport. This study introduces a composite solid polymer electrolyte that combines a soft copolymer with high ionic conductivity and cellulose nanofibers, which enhances the hardness without sacrificing the ionic conductivity. The composite electrolyte demonstrates good cycling ability and electrochemical stability, showing great potential for application in lithium metal batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Hanna Traeger, Derek Kiebala, Celine Calvino, Yoshimitsu Sagara, Stephen Schrettl, Christoph Weder, Jess M. Clough
Summary: In this study, a generalisable protocol based on optical microscopy, tensile testing, and image processing is proposed for the spatially resolved interrogation of mechanical deformation at the molecular level around defects in mechanophore-containing polymers. This approach can be applied to a broad range of polymeric materials, mechanophores, and deformation scenarios.
MATERIALS HORIZONS
(2023)
Article
Materials Science, Multidisciplinary
Keiko Hiratsuka, Tatsuya Muramatsu, Takuya Seki, Christoph Weder, Go Watanabe, Yoshimitsu Sagara
Summary: In this study, the correlation between the mechanoresponsive luminescent behavior of rotaxane mechanophores and the size of the stopper used in the mechanophores was investigated. It was found that larger stoppers prevent the detachment of the ring molecule, resulting in reversible emission intensity changes, while smaller stoppers lead to irreversible emission intensity changes. Molecular dynamics simulations confirmed these experimental observations. This study demonstrates the ability to create polymers with a wide range of mechanoresponsive luminescence behaviors by varying the size of the stopper.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Automation & Control Systems
Livius F. Muff, Christoph Weder
Summary: This study develops segmented polyurethanes with crystallizable polyethylene glycol (PEG) soft segments and hard segments formed by the reaction of 1,6-hexane diisocyanate and 1,4-butanediol (BDO). By varying the molecular weight of the PEG segments and the hard-segment content, the thermal expansion of these materials is correlated with their crystallinity, resulting in high deflection and low switching temperatures.
ADVANCED INTELLIGENT SYSTEMS
(2023)