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Items from 1 to 20 out of 275 results

article

Preparation of zeolite-A/chitosan hybrid composites and their bioactivities and antimicrobial activities

Liang Yu, Jie Gong, Changfeng Zeng, Lixiong Zhang, more

Materials Science & Engineering C > 2013 > 33 > 7 > 3652-3660

Zeolite-A/chitosan hybrid composites with zeolite contents of 20–55wt.% were prepared by in situ transformation of silica/chitosan mixtures in a sodium aluminate alkaline solution through impregnation–gelation–hydrothermal synthesis. The products were characterized by X-ray diffraction, diffuse reflectance infrared Fourier transform spectroscopy, scanning electron microscopy, thermogravimetric analysis,...

article

Preparation of polyurethane composites reinforced with halloysite and carbon nanotubes

Mohammadali Pourmohammadi‐Mahunaki, Vahid Haddadi‐Asl, Hossein Roghani‐Mamaqani, Mojtaba Koosha, more

Polymer Composites > 42 > 1 > 450 - 461

Polyurethane composites were synthesized using carbon nanotube (CNT) and CNT‐halloysite (HNT) hybrid in different amounts. Thermal, rheological, and mechanical properties of the composites were studied using thermogravimetric analysis, rheometrics mechanical spectrometry, dynamic mechanical thermal analysis, stress‐strain analysis, and hardness measurement. In this context, phase separation, elastic...

article

Thermo‐mechanical properties of jute/bamboo/polyethylene hybrid composites: The combined effects of silane coupling agent and copolymer

Fui Kiew Liew, Sinin Hamdan, Md. Rezaur Rahman, Mohamad Rusop, more

Polymer Composites > 41 > 11 > 4830 - 4841

The effects of 3‐aminopropyl triethoxysilane (APTS) coupling agent and poly(ethylene‐co‐glycidyl methacrylate) (EGMA) copolymer on thermal, mechanical, and morphological properties of hybrid composites were investigated. There were a range of methods used to fabricate hybrid composites that included, untreated jute and bamboo fiber, APTS treated jute and bamboo fiber, and EGMA and low‐density polyethylene...

article

Review on nano‐and microfiller‐based polyamide 6 hybrid composite: Effect on mechanical properties and morphology

Tarun Sai Ghanta, Sridhar Aparna, Namrata Verma, Doddipatla Purnima

Polymer Engineering & Science > 60 > 8 > 1717 - 1759

Polyamide 6 (PA6)‐based composites are of evolving interest due to its high strength, wear resistance, and barrier properties. The use of binary composites mostly with nanomaterial and glass fibers has been reviewed and presented in literature. However to obtain a balance of properties like stiffness, toughness, and strength along with cost reduction, ternary composites of PA6 have been designed....

article

Corrosion study and quantitative measurement of crystallite size of high strength aluminum hybrid composite developed via friction stir processing

O.M. Ikumapayi, E.T. Akinlabi, J.D. Majumdar, O.S.I. Fayomi, more

Materialwissenschaft und Werkstofftechnik > 51 > 6 > 732 - 739

This present study is centered on the corrosion behaviors and structural integrity of high strength aluminum‐alloy 7075‐T651 hybridized with carbonaceous coconut shell ash (CSA) and α+β titanium alloy powder in ratio of 50 : 50, fabricated during friction stir processing (FSP). The study examined the base metal – AA7075‐T651 as well as the friction stir processed AA7075‐T651 as control experiments...

article

Effect of Accelerated Ageing on the Ballistic Resistance of Hybrid Composite Armour with Advanced Ceramics and UHMWPE Fibres

Marzena Fejdyś, Agnieszka Kucharska-Jastrząbek, Katarzyna Kośla

Fibres & Textiles in Eastern Europe > 2020 > Nr 1 (139) > 71--80

The main objective of this complex study was to evaluate the durability of newly developed ballistic inserts designed using ultra-high-molecular-weight polyethylene (UHMWPE) fibres and advanced ceramics (Al₂O₃or SiC). The forecasting of changes in the properties of the newly developed ballistic system is related to safe use and reliable construction, and requires ageing tests to be carried out in...

article

Hybrid aluminum matrix composites containing carbon nanotubes and zirconium diboride particles: fractography, microstructure and mechanical performance

Anas Farooqi, Masood Ahmed, Tayyab Subhani, Syed Wilayat Husain

SN Applied Sciences > 2019 > 1 > 12 > 1-12

Hybrid aluminum matrix composites (HAMCs) containing carbon nanotubes (CNTs) and zirconium diboride (ZrB₂) particles were prepared via solid-state powder metallurgy route. The constituents of HAMCs were initially ball milled for uniform dispersion, and subsequently composite mixtures were consolidated by cold compaction, which was followed by pressureless sintering. The fractions of nanotubes and...

article

Practical absorptive frequency selective surface based on printed electronics technology for radome applications

In‐Gon Lee, Yoon‐Jae Kim, Ic‐Pyo Hong

Microwave and Optical Technology Letters > 61 > 12 > 2709 - 2719

This study uses screen‐printing technology to create resistive components by employing carbon‐based electric ink (55 Ω/□) printing, and an absorptive frequency selective surface (FSS) was designed with absorptive properties in the C‐band and transmissive properties in the X‐band. This was done to ensure structural stability and to overcome the limitations of lumped‐element‐based absorptive‐FSS, which...

article

Use of Constants of Carbon and Ultrahigh-Molecular-Weight Polyethylene Fiber for Calculation of Density of Unidirectional Composites

V. I. Mamonov, I. K. Krylov

Inorganic Materials: Applied Research > 2019 > 10 > 5 > 1015-1022

A method making it possible to calculate the density and matrix volume fraction of two-component and hybrid composites reinforced with unidirectional rovings of carbon fibers (CF) and ultrahigh-molecular-weight polyethylene (UHMWPE) fibers is presented. Experimentally found constants of the rovings were used in calculation. The values of calculated density and matrix volume fraction were compared...

article

Functionalized graphene nanoplatelets/modified polybutadiene hybrid composite

Solmaz Aliyeva, Rasim Alosmanov, Irada Buniyatzadeh, Goncha Eyvazova, more

Colloid and Polymer Science > 2019 > 297 > 11-12 > 1529-1540

Functionalized graphene nanoplatelets (FGNPs) were synthesized through oxidative chlorophosphorylation (OxCh) reaction of graphite and subsequent hydrolysis of obtained chlorophosphonated graphite. Then FGNPs were used as a nanoscale filler to fabricate FGNPs/modified polybutadiene (MPB) hybrid composite (FGNPs/MPB). Fourier-transform infrared spectroscopy found that FGNPs have phosphonate functional...

article

Improved Interlaminar Shear Behaviour of a New Hybrid Kevlar/Cocos Nucifera Sheath Composites with Graphene Nanoplatelets Modified Epoxy Matrix

J. Naveen, M. Jawaid, E. S. Zainudin, Mohamed T. H. Sultan, more

Fibers and Polymers > 2019 > 20 > 8 > 1749-1753

This research investigated the effect of hybridizing Kevlar/cocos nucifera sheath and the effect of adding different wt.% of Graphene nanoplatelets (GNP) on the interlaminar shear behaviour of laminated composites. Initially, different wt.% (0, 0.25, 0.50, and 0.75) of GNP’s were mixed with epoxy resin through Ultrasonic-sonication. Then the laminated composites were fabricated by hand lay-up method...

article

Cooperation of Fe₂O₃@C and Co₃O₄/C subunits enhances the cyclic stability of Fe₂O₃@C/Co₃O₄ electrodes for lithium‐ion batteries

Yujun Chai, Xiuman Wang, Yanan Yu, Xiaofeng Shi, more

International Journal of Energy Research > 43 > 11 > 6045 - 6055

A Fe₂O₃@C/Co₃O₄ hybrid composite anode is synthesized via a two‐step hydrothermal method in which the acetylene carbon black component serves as a conductive matrix and as an effective elastic buffer to relieve the stress from Fe₂O₃@C and Co₃O₄/C during the electrochemical testing. The crystallinity, structure, morphology, and electrochemical performance of the composites are systematically characterized...

article

Measurement of dispersion and homogeneity of functionalized graphene/CNT hybrid epoxy composite

Manoj Kumar Shukla, Kamal Sharma

SN Applied Sciences > 2019 > 1 > 9 > 1-7

Fabrication of amine-functionalized multi-graphene layers and multi-walled carbon nanotube nanofillers (0.25, 0.50, 1 and 2 wt%) reinforced with epoxy resin has been successfully performed to obtain hybrid epoxy composite. Effect of filler ratio on dispersion and homogeneity of hybrid composite mixture is investigated. Particle size distribution (PSD) pattern and tensile properties of hybrid composite...

article

Mechanical Hardness and Adhesion Property of Surface-Polymerized Nanocomposites based on Polyaniline and Sol-Gel Silica

Young Been Lee, Chung Hyoi Park, Sung Kyu Jang, Felix Sunjoo Kim

Journal of the Korean Physical Society > 2019 > 75 > 3 > 248-253

We have investigated the mechanical hardness and adhesion property of electrically conductive polyaniline (PANI) and polyaniline/silane composites prepared on a glass substrate by using a simple polymerization and deposition method. The formation of the conducting nanocomposites was verified by spectroscopic analyses and electron microscopy imaging. The polyaniline films formed in the presence of...

article

Failure analysis of laminated composite plate under hygro-thermo mechanical load and optimisation

A. Choudhury, S. C. Mondal, S. Sarkar

International Journal of Applied Mechanics and Engineering > 2019 > Vol. 24, no. 3 > 509--526

Failure analysis of laminated composite plates for different mechanical, thermo mechanical and hygro-thermo mechanical loads for different ply thicknesses, stacking sequences, fiber orientation angles and composite material systems is presented in the paper. A comparative study of different failure theories is also presented in the paper. The effect of fiber orientation angles on the first ply failure...

article

Efficient and Selective Methane Borylation Through Pore Size Tuning of Hybrid Porous Organic‐Polymer‐Based Iridium Catalysts

Qi Chen, Anwang Dong, Dongxu Wang, Lu Qiu, more

Angewandte Chemie International Edition > 58 > 31 > 10671 - 10676

As a new energy source that could replace petroleum, the global reserves of methane hydrate (combustible ice) are estimated to be approximately 20 000 trillion cubic meters. A large amount of methane hydrate has been found under the seabed, but the transportation and storage of methane gas far from coastlines are technically unfeasible and expensive. The direct conversion of methane into value‐added...

article

Green Synthesis of Aluminium Oxide Nanoparticles and its Applications in Mechanical and Thermal Stability of Hybrid Natural Composites

K. R. Sumesh, K. Kanthavel

Journal of Polymers and the Environment > 2019 > 27 > 10 > 2189-2200

In the current scenario, biosynthesis has a major trend in the world due to its eco-friendly approach, effectiveness and low cost. In this experiment Aluminium Oxide nano powder was extracted from ‘Muntingia Calabura’ leaf with aluminium nitrate as precursor. An attempt has been made to develop the properties of sisal/coir, sisal/banana and banana/coir based hybrid composite with addition of aluminium...

article

Mechanical and thermal behavior of hybrid glass/jute fiber reinforced composites with epoxy/polyester resin

P. Manuneethi Arasu, A. Karthikayan, R. Venkatachalam

Polimery > 2019 > T. 64, Nr 7-8 > 504--508

The hybrid glass/jute fiber composites were fabricated by hand layup (HL) and vacuum assisted resin transfer molding (VARTM) method using epoxy and isophthalic polyester resins as matrices. The effects of fiber and matrix type as well as fabrication method on the tensile and flexural mechanical strength of resulting composites were investigated. The morphological fracture was analyzed based on scanning...

article

Tribological behavior of unsaturated polyester hybrid composites containing wood flour and carbon nanotubes

Omid Nabinejad, Willey Y. H. Liew, Sujan Debnath, Muhammad Ekhlasur Rahman, more

SN Applied Sciences > 2019 > 1 > 7 > 1-9

The dry-wear behavior of hybrid composites comprising of multi-walled carbon nanotubes (MWCNTs) and wood flour (oil palm kernel shell powder) within an unsaturated polyester matrix was investigated in this paper. The results revealed that the incorporation of wood flour -even at little as 10 wt% filler content- significantly improved the tribological behavior of the composite. This improvement in...

article

Microstructural characteristics and mechanical behaviour of aluminium hybrid composites reinforced with groundnut shell ash and B₄C

L. Venkatesh, T. V. Arjunan, K. Ravikumar

Journal of the Brazilian Society of Mechanical Sciences and Engineering > 2019 > 41 > 7 > 1-13

In this study, aluminium hybrid composites were fabricated by reinforcing eco-friendly agrowaste, groundnut shell ash and boron carbide using squeeze casting method. Groundnut shell ash and boron carbide were added in ratios of 2.5:7.5, 5:5 and 7.5:2.5 percentages by weight. The impact on mechanical properties namely density, hardness, tensile strength, impact strength was studied, and the results...

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Preparation of zeolite-A/chitosan hybrid composites and their bioactivities and antimicrobial activities

Preparation of polyurethane composites reinforced with halloysite and carbon nanotubes

Thermo‐mechanical properties of jute/bamboo/polyethylene hybrid composites: The combined effects of silane coupling agent and copolymer

Review on nano‐and microfiller‐based polyamide 6 hybrid composite: Effect on mechanical properties and morphology

Corrosion study and quantitative measurement of crystallite size of high strength aluminum hybrid composite developed via friction stir processing

Effect of Accelerated Ageing on the Ballistic Resistance of Hybrid Composite Armour with Advanced Ceramics and UHMWPE Fibres

Hybrid aluminum matrix composites containing carbon nanotubes and zirconium diboride particles: fractography, microstructure and mechanical performance

Practical absorptive frequency selective surface based on printed electronics technology for radome applications

Use of Constants of Carbon and Ultrahigh-Molecular-Weight Polyethylene Fiber for Calculation of Density of Unidirectional Composites

Functionalized graphene nanoplatelets/modified polybutadiene hybrid composite

Improved Interlaminar Shear Behaviour of a New Hybrid Kevlar/Cocos Nucifera Sheath Composites with Graphene Nanoplatelets Modified Epoxy Matrix

Cooperation of Fe₂O₃@C and Co₃O₄/C subunits enhances the cyclic stability of Fe₂O₃@C/Co₃O₄ electrodes for lithium‐ion batteries

Measurement of dispersion and homogeneity of functionalized graphene/CNT hybrid epoxy composite

Mechanical Hardness and Adhesion Property of Surface-Polymerized Nanocomposites based on Polyaniline and Sol-Gel Silica

Failure analysis of laminated composite plate under hygro-thermo mechanical load and optimisation

Efficient and Selective Methane Borylation Through Pore Size Tuning of Hybrid Porous Organic‐Polymer‐Based Iridium Catalysts

Green Synthesis of Aluminium Oxide Nanoparticles and its Applications in Mechanical and Thermal Stability of Hybrid Natural Composites

Mechanical and thermal behavior of hybrid glass/jute fiber reinforced composites with epoxy/polyester resin

Tribological behavior of unsaturated polyester hybrid composites containing wood flour and carbon nanotubes

Microstructural characteristics and mechanical behaviour of aluminium hybrid composites reinforced with groundnut shell ash and B₄C

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