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Journal of Mechanics Engineering and Automation 2015年第9期5卷 510-518页

作者： Ewa Kicko-Walczak Grazyna Rymarz Institute for Engineering of Polymer Materials and Dyes Piastow 05-820 Poland Branch of Paints and Plastics Institute for Engineering of Polymer Materials and Dyes Gliwice 44-100 Poland

The consumption ofthermoset resins as building polymers is approximately over one million tone word wide. The thermoset resins are proven construction materials for the technical and highly demanding applications of the transportation, electrical and building part industry. Heat stability, high thermal, low shrinkage, excellent mechanical properties are typical for their type of polymers. Above applications in addition to the mechanical properties also require good flame retardants of the materials. Undertaken activities refer to official draft, laws and legal recommendations in UE states. This paper presents positive effect of reduced flammability of thermoset resins （unsaturated polyester and epoxy resins） thanks to the use of nanocomposites containing multi-ingredient halogen-flee flame retardants which combine conventional phosphorus/nitrogen modifiers interacting with nanofillers （oMMT （organomodified montmorillonite）, EG （expandable graphite）, graphene, GO （graphene oxide）, nSi （nanosilica））.

关键词： FR (fire retardants) halogen-free FR additives nanofillers nanocomposites flammability of thermoset resins test methods.

Effect of nanofillers on Abrasion Resistance of Carbon Fiber Reinforced Phenolic Friction Composites

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Materials Sciences and Applications 2019年第1期10卷 65-77页

作者： Bharath Basavaraj Pattanashetty Suresha Bheemappa Hemanth Rajashekaraiah Somashekar Hirehally Mahadevappa Department of Automobile Engineering Sri Jagadguru Mallikarjuna Murugharajendra Institute of Technology Chitradurga India Department of Mechanical Engineering The National Institute of Engineering Mysore India Department of Mechanical Engineering NIE Institute of Technology Mysore India Department of Mechanical Engineering Dr. Ambedkar Institute of Technology Bengaluru India

The present study focuses on the development of polymeric friction composites with short carbon fiber, micron and nano-sized fillers, additives with varying weight% in phenol formaldehyde (PF) matrix using hot compression moulding process. The composites prepared with fillers viz. Molybdenum disulfide or Molykote (MK) and multi walled carbon nanotubes (MWCNTs) in carbon fiber reinforced PF matrix is designated as Set-I composites. Inclusion of graphite and nano-clay in carbon fiber reinforced PF matrix is designated as Set-II composites. The prepared composites are tested in Dry sand rubber wheel abrasion wear test rig, following ASTM standards for evaluating the abrasive wear behaviour. From the routine experiments, it was observed that the presence of combined micro and nanofillers i.e. 11.5 wt% MK + 0.5 wt% MWCNTs of Set-I, has shown superior abrasion resistance among the study group. The test results of the Set-I and Set-II composites are analyzed using Taguchi experimental design followed by analysis of variance (ANOVA) to understand the contributions of wear control factors affecting the abrasive wear characteristics. Further, worn surface of selected samples is analyzed using scanning electron micrographs.

关键词： Friction Composites nanofillers Abrasion Design of Experiments Scanning Electron Microscope

Assessment of the Erosive Wear Kinetics of Epoxy Coatings Modified with nanofillers

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Journal of Surface Engineered Materials and Advanced Technology 2013年第1期3卷 89-93页

作者： Danuta Kotnarowska Michal Przerwa Department of Mechanical Engineering University of Technology and HumanitiesRadomPoland

The paper presents results of investigation on the erosive wear kinetics of epoxy coatings modified with alumina or silica nanoparticles. Natural weathering caused a decrease of their erosive wear resistance. After a 3-year natural weathering, highest erosive wear resistance showed the epoxy coating modified with alumina nanoparticles.

关键词： Polymer Coating nanofillers Erosive Wear Resistance Natural Weathering

Role of Metallic nanofillers on Mechanical and Tribological Behaviour of Carbon Fabric Reinforced Epoxy Composites

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Materials Sciences and Applications 2018年第9期9卷 740-750页

作者： G. S. Divya B. Suresha Department of Mechanical Engineering The National Institute of Engineering Mysuru India Department of Automobile Engineering Dayananda Sagar College of Engineering Bengaluru India

In this study, hybrid composites based on carbon fabric and epoxy (C/Ep) were fabricated by hand lay-up method followed by compression moulding. The C/Ep with optimum carbon fiber (60 wt%) was chosen as a reference material, and to it, the metallic nanoparticles like aluminum (Al) and zinc (Zn) of different wt% (0.5 and 1.0) were included as secondary fillers. To understand the synergism effect of these hybrid reinforcements, mechanical properties and tribological behavior of composites were studied. From the test results, it was proved that hybridization improved the mechanical and tribological properties. The C/Ep consisting of 0.5 wt% Zn and Al showed higher tensile properties in comparison with all other fabricated composites. Increase in flexural strength and flexural modulus also observed as the filler content increased in C/Ep composite. Higher impact strength is noted at 1 wt% Zn filled C/Ep composite. Wear test data revealed that 0.5 wt% Zn in C/Ep has got superior wear resistance. Wear mechanisms were discussed using scanning electron micrographs of selected worn surfaces of the composites.

关键词： Carbon-Epoxy Metallic nanofillers Mechanical Properties Wear Wear Mechanisms

One-dimensional metallic, magnetic, and dielectric nanomaterialsbased composites for electromagnetic wave interference shielding

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Nano Research 2022年第10期15卷 9595-9613页

作者： Ya Cheng Wendong Zhu Xiaofeng Lu Ce Wang Alan G.MacDiarmid Institute College of ChemistryJilin UniversityChangchun 130012China

The excrescent electromagnetic(EM)radiation exposure in the air threatens human health and electronic equipment due to the abuse of EM waves in wireless telecommunication technology and electronic ***,electromagnetic interference(EMI)shielding materials are provided to solve the EM waves pollution *** particular,the appearance of onedimensional(1D)metallic,magnetic,and dielectric nanofillers will extremely reduce the density of EMI composite and enhance EMI protection performance because they can easily assemble to form complete two-dimensional(2D)or three-dimensional(3D)EMI network based on their high aspect ratio,large specific surface area,and additional attenuated *** review focuses on the EMI shielding composites with 1D metallic,magnetic,and dielectric nanofillers,which could be constructed in the final form of membrane-or aerogel/sponge-like shielding *** to the structural features,1D metallic,magnetic,and dielectric nanofillers are classified into nanowires,nanorods,nanospindles,nanochains,nanofibers,nanotubes,nanorings,nanocoils,and quasi-one-dimensional(1D)van der Waals ***,the fabricated routes,shielding performances,and EM waves attenuation mechanism of the 1D metallic,magnetic,and dielectric nanofiller-based composites are *** is found that the dominant shielding mechanism of most of the 1D metal-based EMI composites is reflection loss,while that of 1D magnetic and dielectric nanomaterials-based EMI composites is absorption loss caused by interfacial polarization,natural resonance,eddy current,and multiple ***,the challenges and prospects of 1D nanofiller-based composites with a tunable architecture and composition are put forward,aiming to give a guideline for the next generation of high-performance EMI shielding materials.

关键词： one-dimensional nanofillers composites electromagnetic interference(EMI)shielding mechanism

Channel regulation of TFC membrane with hydrophobic carbon dots in forward osmosis

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Chinese Chemical Letters 2021年第9期32卷 2882-2886页

作者： Zongju Zhang Jiugang Hu Shijun Liu Xin Hao Lin Li Guoqiang Zou Hongshuai Hou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

Zero-dimensional carbon dots have emerged as important nanofillers for the separation membrane due to their small specific size and rich surface functional *** study proposed a strategy based on hydrophobic carbon dots(HCDs)to regulate water channels for an efficient forward osmosis(FO)***-film composite(TFC)membranes with superior FO performance are fabricated by introducing HCDs as the nanofiller in the polyacrylonitrile support *** introduction of HCDs promotes the formation of the support layer with coherent finger-like hierarchical channels and micro-convex structure and an integrated polyamide active *** to the original membrane,TFC-FO membrane with 10 wt%HCDs exhibits high water flux(15.47 L m^(-2)h^(-1))and low reverse salt flux(2.9 g m^(-2)h^(-1))using 1 mol/L Na Cl as the draw *** improved FO performance is attributed to the lower structural parameters of HCDs-induced water channels and alleviated internal concentration ***,this paper provides a feasible strategy to design the membrane structure and boost FO performance.

关键词： Forward osmosis Thin-film nanocomposite Hydrophobic carbon dots Channel regulation nanofillers

On mechanical properties of nanocomposite hydrogels:Searching for superior properties

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Nano Materials Science 2022年第2期4卷 83-96页

作者： Wenjin Xing Youhong Tang Institute for NanoScale Science and Technology College of Science and EngineeringFlinders UniversitySouth Australia 5042Australia

Nanocomposite hydrogels are the combination of known components that are a hydrogel and nanometre-sized fillers,typically leading to improved mechanical properties or new *** simplicity of design and ease of synthesis,recent advances have highlighted that this family of hydrogels holds the significant promise of application in diverse biomedical and engineering *** elaborate design and investigation as well as suitable application of nanocomposite hydrogels require the synergy of mechanics,materials science,engineering,and *** similarities in design and fabrication,the data of mechanical properties for nanocomposite hydrogels scatter in a large *** is worthwhile comparing various nanocomposite hydrogels for similarities and differences in mechanical properties to aid in designing novel hydrogels with extreme properties,and guide practical *** review aims to fill,in the literature,the missing gap of addressing mechanical measurement methods and comparison of mechanical properties in this ever-evolving broad area of ***,the challenges and future research opportunities are highlighted.

关键词： Hydrogel nanofillers Mechanical properties Nanocomposite Design Characterisation

Mechanical Properties Amelioration of Hybrid Composites by Concomitant Synergy Between Graphene Oxide and Silica Nanoparticles

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Journal of Harbin Institute of Technology(New Series) 2018年第4期25卷 31-40页

作者： Anchalee Duongthipthewa Shuming Yang Yiming Wang State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University

Composite materials have attracted increasing attention to replace traditional materials such as metals for aerospace and automotive components due to their excellent mechanical and lightweight *** reinforcing with fillers,the material properties can be tailored to suit the needs of certain *** graphene oxide(GO) and silica(SiO_2) are incorporated into carbon fibre/epoxy(CF/E)composites to enhance epoxy resin properties by impregnating into the weak area of resin and boosting the interaction forces between resin and filler *** mechanical,thermal,and morphological properties of GO and SiO_2 fillers in the CF/E were ***,after the exposure to distilled water and salt water,effect of moisture absorption on flexural and impact properties were investigated and the CF/E composite with hybrid nanofillers exhibited strong resistance to degradation in flexural and impact *** images of the fracture surfaces indicated that the good performance of CF/E composite with bi-hybrid nanofillers originated from the synergistic GO and SiO_2 nanofillers,which limit the motion of epoxy polymer molecular chain and give sufficient stress transfer ability to the composite *** overall results showed that GO and SiO_2 fillers can significantly enhance the mechanical properties as well as resistance to moisture environment.

关键词： composites nanofillers mechanical properties thermal analysis moisture absorption

Indoor Formaldehyde Removal Techniques through Paints: Review

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Green and Sustainable Chemistry 2024年第1期14卷 1-15页

作者： Prajyot Dhawale Ravindra V. Gadhave Department of Polymer and Surface Engineering Institute of Chemical Technology Mumbai India

Due to its ability to cause illnesses and discomfort even at low concentrations, formaldehyde pollution of indoor air poses a significant risk to human health. Sources of formaldehyde in indoor environments include textiles, paints, wallpapers, glues, adhesives, varnishes, and lacquers;furniture and wooden products like particleboard, plywood, and medium-density fiberboard that contain formaldehyde-based resins;shoe products;cosmetics;electronic devices;and other consumer goods like paper products and insecticides. According to the World Health Organisation, indoor formaldehyde concentrations shouldn’t exceed 0.1 mg/m3. The methods include membrane separation, plasma, photocatalytic decomposition, physisorption, chemisorption, biological and botanical filtration, and catalytic oxidation. Materials based on metal oxides and supported noble metals work as oxidation catalysts. Consequently, a paint that passively eliminates aldehydes from buildings can be developed by adding absorbents and formaldehyde scavengers to the latex composition. It will be crucial to develop techniques for the careful detection and removal of formaldehyde in the future. Additionally, microbial decomposition is less expensive and produces fewer pollutants. The main goal of future research will be to develop a biological air quality control system that will boost the effectiveness of formaldehyde elimination. The various methods of removing formaldehyde through paints have been reviewed here, including the use of mixed metal oxides, formaldehyde-absorbing emulsions, nano titanium dioxide, catalytic oxidation, and aromatic formaldehyde abating materials that can improve indoor air quality.

关键词： Formaldehyde Absorption Paints Catalytic Oxidation nanofillers