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Natural Rubber Based Composites Comprising Different Types of Carbon-Silica hybrid fillers. Comparative Study on Their Electric, Dielectric and Microwave Properties, and Possible Applications

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Materials Sciences and Applications 2016年第6期7卷 295-306页

作者： Ahmed A. Al-Ghamdi Omar A. Al-Hartomy Falleh R. Al-Solamy Nikolay Dishovsky Mihail Mihaylov Petrunka Malinova Nikolay Atanasov Department of Physics Faculty of Science King Abdulaziz University Jeddah KSA Department of Mathematics Faculty of Science King Abdulaziz University Jeddah KSA Department of Polymer Engineering University of Chemical Technology and Metallurgy Sofia Bulgaria Department of Telecommunications University of Telecommunications and Post Sofia Bulgaria Department of Communication and Computer Engineering South-West University "Neofit Rilski" of Blagoevgrad Blagoevgrad Bulgaria

The paper presents a comparative study on the electric, dielectric and microwave properties of natural rubber based composites comprising dual phase fillers prepared from furnace carbon black or conductive carbon black with a different amount of silica. It has been established that, the specifics of the carbon phase have a marked strong effect upon the properties mentioned above. The interpenetration of the two filler phases and the grade of isolation of the conductive carbon phase by the dielectric one depend on the ratio between them. On the other hand, that leads to a change in all properties of the studied composites, which allows tailoring those characteristics.

关键词： Polymer Composites hybrid fillers Dielectric Properties Microwave Properties

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Recent Progress in Fabrication and Structural Design of Thermal Conductive Polymer Composites

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Chinese Journal of Polymer Science 2024年第3期42卷 277-291,I0004页

作者： Yuan-Kai Du Zheng-Xue Shi Shan Dong Hui Jin Xue Ke Pei Zhao Bing-Bing Jiang Feng You Hubei Key Laboratory of Plasma Chemistry and Advanced Materials School of Material Science and EngineeringWuhan Institute of TechnologyWuhan 430205China Key Laboratory of Green Preparation and Application of Functional Materials Ministry of EducationHubei UniversityWuhan 430062China Institute of Molecular Aggregation Science Tianjin UniversityTianjin 300072China

In recent years, the demand direction for electronic equipment has expanded into embedded and miniaturized devices. The heat radiation problem has become one of the most significant factors for hindering the development of electronic devices. Since heat radiation material is one of the important components in electronic devices, the demand for enhancing thermal conductivity is also increasingly urgent. Research on thermal conductive polymer composites has become a major direction for developing functional composites. This work reviewed the recent progress in the fabrication of thermal conductive polymer composites. Five different structures are presented, including the using of single fillers,hybrid fillers, double threshold percolation structure, segregated structure and other complex multiphase structures. Specifically, the preparation of high-performance thermal conductive polymer composites was introduced through the combination of various thermal conductive ***, the development direction of high thermal conductive polymer composites was briefly explored.

关键词： Thermal conductive polymer hybrid fillers Polymer composite Thermal resistance

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Simultaneously Improved Dielectric Constant and Breakdown Strength of PVDF-based Composites with Polypyrrole Nanowire Encapsuled Molybdenum Disulfide Nanosheets

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Chinese Journal of Polymer Science 2022年第5期40卷 515-525页

作者： Hua-Bin Luo Xiao-Ren Pan Jing-Hui Yang Xiao-Dong Qi Yong Wang School of Materials Science&Engineering Key Laboratory of Advanced Technology of Materials(Ministry of Education)Southwest Jiaotong UniversityChengdu 610031China

High-performance dielectric polymer composites have received increasing attention due to their important applications in the field of energy *** rational structural design of hybrid fillers can lead to a balance between high dielectric constant and insulation in *** this work,novel hybrid fillers were fabricated by in situ synthesizing one-dimensional polypyrrole nanowires(PPynws)on the twodimensional molybdenum disulfide(MoS_(2)),which integrated the good ion polarization ability of PPynws and the high insulation and adjustable band gap of MoS_(2).Compared with the binary poly(vinylidene fluoride)(PVDF)/MoS_(2) composites,the PVDF/MoS_(2)-PPynws composites exhibited remarkably improved dielectric constant and breakdown strength,while the dielectric loss was still maintained at a low *** optimal ternary composite with 1 wt%MoS_(2)-PPynws showed a high dielectric constant(15@1kHz),suppressed dielectric loss(0.027@1kHz),and high breakdown strength(422.1 MV/m).PPynws inducing strong interfacial polarization and the highly insulated MoS_(2) nanosheets extending the breakdown path mainly contributed to the synchronously enhanced dielectric constant and breakdown *** intriguing synthesis method of PVDF/MoS_(2)-PPynws nanocomposite will open up new opportunities for fabricating nanostructured polymer composites to produce high dielectric materials.

关键词： hybrid fillers Molybdenum disulfide Polypyrrole nanowires Dielectric composites Breakdown strength

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hybrid Straw/Perlite Reinforced Natural Rubber Biocomposites

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Journal of Bionic Engineering 2019年第6期16卷 1127-1142页

作者： Marcin Maslowski Justyna Miedzianowska Krzysztof Strzelec Institute of Polymer&Dye Technology Lodz University of TechnologyStefanowskiego 12/1690-924 LodzPoland

The purpose of the work is to prepare and characterize hybrid fillers of cereal straw perlite as well as to examine their impact on the functional properties of elastomeric *** rubber was used as the polymer matrix,vulcanized with a sulfuric crosslinking *** subject matter of the work included an interdisciplinary knowledge segment in the field of polymertechnology—hybrid *** work investigated the effect of physical(mecha nical)modificatio n of ligno cellulosic *** process of milling and homogenization of cereal straw with the addition of perlite was carried out in a planetary ball *** properties of biocomposites were examined in terms of two key aspects:The amount of hybrid filler and its ratio(cereal straw to natural mineral).The plate-like structure of natural minerals and the fibrous structure of cereal straw created a two-component filler,which influenced the properties of the produced biomaterials.A significant improvement in barrier,crosslinking density,hardness,mechanical and damping properties has been noted for systems containing hybrid ***,all vulcanizates proved to be resistant to the nnooxidative ***,the straw modificated with perlite fonned a more complex structure in the composites,resulting in a stronger reinforcing effect,which was confirmed by dynamic-mechanical analysis(Payne effect).

关键词： hybrid fillers straw perlite biocomposites natural rubber

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