Pub Date : 2023-01-01DOI: 10.4236/ojcm.2023.131001
D. Yadav, Anju Yadav, S. K. Jain, Narendra Jakhar, B. Tripathi
{"title":"A Decisive Study on Dielectric Response of Bi<sub>2</sub>O<sub>3</sub>/Polystyrene & Bi<sub>2</sub>O<sub>3</sub>/PVDF Composite as Flexible Electrodes for Energy Storage","authors":"D. Yadav, Anju Yadav, S. K. Jain, Narendra Jakhar, B. Tripathi","doi":"10.4236/ojcm.2023.131001","DOIUrl":"https://doi.org/10.4236/ojcm.2023.131001","url":null,"abstract":"","PeriodicalId":57868,"journal":{"name":"复合材料期刊(英文)","volume":"102 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70624467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of Plastic and Coconut Shell (Cocos <i>nucifera L.</i>) on the Physico-Mechanical Properties of the 8/6 Composite Rafter","authors":"Fofana Souleymane, Jolissaint Obre Sery Paul, Emeruwa Edjikémé, Yomanfo Assoumou Joseph","doi":"10.4236/ojcm.2023.134005","DOIUrl":"https://doi.org/10.4236/ojcm.2023.134005","url":null,"abstract":"","PeriodicalId":57868,"journal":{"name":"复合材料期刊(英文)","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70624475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.4236/ojcm.2022.124009
Yuto Imaeda, A. Todoroki, R. Matsuzaki, M. Ueda, Y. Hirano
{"title":"2D Fusion Simulations and Experimental Confirmations of Print Paths Using Composite Particles with Particle Method for Fused Filament Fabrication","authors":"Yuto Imaeda, A. Todoroki, R. Matsuzaki, M. Ueda, Y. Hirano","doi":"10.4236/ojcm.2022.124009","DOIUrl":"https://doi.org/10.4236/ojcm.2022.124009","url":null,"abstract":"","PeriodicalId":57868,"journal":{"name":"复合材料期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70624426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.4236/ojcm.2022.122006
Gladys A. Quartey, John Frank Eshun, Emmanual Yaw Wereko
Equilibrium moisture contents (EMC) of wood species are very necessary in the utilization of these in service. This study investigated the EMC of five lesser utilized species of Ghana and compared it with that of three European species. Sixteen randomly sampled specimens of each of the eight species (heartwood and sapwood) with dimensions 3 cm × 3 cm × 3 cm were exposed at various relative humidity conditions of 30%, 45%, 60%, 75% and 90% in a temperature and humidity-controlled climate chamber at a temperature of 25˚C in accordance to German standard DIN 52182. The species are Albies alba, Fagus sylvatica and Picea abies which are European species and Amphimas pterocarpoides, Antiaris toxicaria, Canarium schweinfurthii, Celtis zenkeri and Cola gigantea are wood species from Ghana. Internal wood temperature and humidity were measured with datalogger. Samples were considered to have reached equilibrium at any given humidity when the daily weight changes were less than 0.1 mg according to German standard DIN 52183. After the last measurements of the weight changes, the samples were dried at 103˚C until there was a constant weight. The five tropical hardwoods had low sorption values recorded and high sorption values for the European species and this could be attributed to differences in the microstructure of these woods.
{"title":"The Equilibrium Moisture Content of Five Lesser Utilized Species of Ghana Contrasted with Three European Species","authors":"Gladys A. Quartey, John Frank Eshun, Emmanual Yaw Wereko","doi":"10.4236/ojcm.2022.122006","DOIUrl":"https://doi.org/10.4236/ojcm.2022.122006","url":null,"abstract":"Equilibrium moisture contents (EMC) of wood species are very necessary in the utilization of these in service. This study investigated the EMC of five lesser utilized species of Ghana and compared it with that of three European species. Sixteen randomly sampled specimens of each of the eight species (heartwood and sapwood) with dimensions 3 cm × 3 cm × 3 cm were exposed at various relative humidity conditions of 30%, 45%, 60%, 75% and 90% in a temperature and humidity-controlled climate chamber at a temperature of 25˚C in accordance to German standard DIN 52182. The species are Albies alba, Fagus sylvatica and Picea abies which are European species and Amphimas pterocarpoides, Antiaris toxicaria, Canarium schweinfurthii, Celtis zenkeri and Cola gigantea are wood species from Ghana. Internal wood temperature and humidity were measured with datalogger. Samples were considered to have reached equilibrium at any given humidity when the daily weight changes were less than 0.1 mg according to German standard DIN 52183. After the last measurements of the weight changes, the samples were dried at 103˚C until there was a constant weight. The five tropical hardwoods had low sorption values recorded and high sorption values for the European species and this could be attributed to differences in the microstructure of these woods.","PeriodicalId":57868,"journal":{"name":"复合材料期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70624403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Glass Fiber Reinforced Polymeric (GFRP) Composites are most commonly used as bumpers for vehicles, electrical equipment panels, and medical devices enclosures. These materials are also widely used for structural applications in aerospace, automotive, and in providing alternatives to traditional metallic materials. The paper fabricated epoxy and polyester resin composites by using silicon carbide in various proportions along with GFRP. The hand lay-up technique was used to fabricate the laminates. To determine the properties of fabricated composites, the tensile, impact, and flexural tests were conducted. This method of fabrication was very simple and cost-effective. Their mechanical properties like yield strength, yield strain, Young’s modulus, flexural modulus, and impact energy were investigated. The mechanical properties of the GFRP composites were also compared with the fiber volume fraction. The fiber volume fraction plays a major role in the mechanical properties of GFRP composites. Young’s modulus and tensile strength of fabricated composites were modelled and compared with measured values. The results show that composites with epoxy resin demonstrate higher strength and modulus compared to composites with polyester resin.
{"title":"Fabrication and Characterization of Glass Fiber with SiC Reinforced Polymer Composites","authors":"Rajashekar Reddy Palle, Jens Schuster, Yousuf Pasha Shaik, Monis Kazmi","doi":"10.4236/ojcm.2022.121002","DOIUrl":"https://doi.org/10.4236/ojcm.2022.121002","url":null,"abstract":"Glass Fiber Reinforced Polymeric (GFRP) Composites are most commonly used as bumpers for vehicles, electrical equipment panels, and medical devices enclosures. These materials are also widely used for structural applications in aerospace, automotive, and in providing alternatives to traditional metallic materials. The paper fabricated epoxy and polyester resin composites by using silicon carbide in various proportions along with GFRP. The hand lay-up technique was used to fabricate the laminates. To determine the properties of fabricated composites, the tensile, impact, and flexural tests were conducted. This method of fabrication was very simple and cost-effective. Their mechanical properties like yield strength, yield strain, Young’s modulus, flexural modulus, and impact energy were investigated. The mechanical properties of the GFRP composites were also compared with the fiber volume fraction. The fiber volume fraction plays a major role in the mechanical properties of GFRP composites. Young’s modulus and tensile strength of fabricated composites were modelled and compared with measured values. The results show that composites with epoxy resin demonstrate higher strength and modulus compared to composites with polyester resin.","PeriodicalId":57868,"journal":{"name":"复合材料期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70624801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.4236/ojcm.2022.123008
Joseph Loic Souck, T. Tchotang, B. Kenmeugne
{"title":"Influence of the Age of Bamboo Culm and Its Vertical Position on the Technological Properties of Bamboo Fibers: A Case of <i>Bambusa vulgaris</i> Species from Cameroonian Culture","authors":"Joseph Loic Souck, T. Tchotang, B. Kenmeugne","doi":"10.4236/ojcm.2022.123008","DOIUrl":"https://doi.org/10.4236/ojcm.2022.123008","url":null,"abstract":"","PeriodicalId":57868,"journal":{"name":"复合材料期刊(英文)","volume":"90 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70624419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.4236/ojcm.2022.124010
Nuhu Caleb Amulah, A. M. El-jummah, A. A. Hammajam, U. Ibrahim
{"title":"Experimental Investigation on the Thermal Properties of Gypsum Plaster-Rice Husk Ash Composite","authors":"Nuhu Caleb Amulah, A. M. El-jummah, A. A. Hammajam, U. Ibrahim","doi":"10.4236/ojcm.2022.124010","DOIUrl":"https://doi.org/10.4236/ojcm.2022.124010","url":null,"abstract":"","PeriodicalId":57868,"journal":{"name":"复合材料期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70624457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.4236/ojcm.2022.123007
Ahmed Mohammed Bukar, Abubakar Mohammed El-Jummah, A. A. Hammajam
{"title":"Development and Evaluation of the Mechanical Properties of Coconut Fibre Reinforced Low Density Polyethylene Composite","authors":"Ahmed Mohammed Bukar, Abubakar Mohammed El-Jummah, A. A. Hammajam","doi":"10.4236/ojcm.2022.123007","DOIUrl":"https://doi.org/10.4236/ojcm.2022.123007","url":null,"abstract":"","PeriodicalId":57868,"journal":{"name":"复合材料期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70624412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.4236/ojcm.2022.121005
H. Sawada, Kako Tono, Katsumi Yamashita
Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [R F -(CH 2 -CHSi(OMe) 3 ) n -R F : n = 2, 3, R F = CF(CF 3 )OC 3 F 7 : R F -(VM) n -R F ], was applied to the facile preparation of the corresponding oligomer/sand (Ottawa sand: OS) composites [R F -(VM-SiO 3/2 ) n -R F /OS] through the sol-gel reaction of the oligomer in the presence of micro-sized OS particles (590 - 840 μm) under alkaline conditions at room temperature. FE-SEM (Field Emission Scanning Electron Micrograph) images showed that the obtained composites con-sist of the R F -(VM-SiO 3/2 ) n -R F oligomeric nanoparticles and the micro-sized OS particles. Interestingly, the R F -(VM-SiO 3/2 ) n -R F /OS composites thus obtained can provide the superoleophilic/superhydrophobic characteristic on the composite surface, applying to the separation of not only the nated micro-sized controlled silica gel (μ-SiO 2 ) composites (average particle size: 9.5 μm), which were prepared under similar conditions. In addition to the separation of oil/water, the fluorinated OS composites provided higher and more selective removal ability for the fluorinated aromatic compounds from aqueous solutions than that of the μ-SiO 2 composites.
Fluoroalkyl节流vinyltrimethoxysilane低聚物(R F - (CH 2 -CHSi(当地)3)n - R F: n = 2, 3 R F = CF (CF 3) OC 3 F 7: R F - (VM) n - R F],应用相应的简单制备低聚物/砂(渥太华砂:OS)复合材料[R F - (VM-SiO 3/2) n - R F / OS)通过溶胶-凝胶反应低聚物的微型操作系统粒子(590 - 840μm)在碱性条件下室温。FE-SEM(场发射扫描电镜)图像显示，复合材料由R F -(vm - sio3 /2) n- R F低聚纳米颗粒和微尺度OS颗粒组成。有趣的是，由此获得的R F -(vm - sio2 3/2) n -R F /OS复合材料在复合材料表面具有超亲油/超疏水特性，不仅适用于在相似条件下制备的微粒径可控硅胶(μ- sio2)复合材料(平均粒径为9.5 μm)的分离。除油/水分离外，氟化OS复合材料对水溶液中含氟芳香族化合物的选择性去除能力比μ- sio2复合材料更高。
{"title":"Facile Preparation of Fluoroalkyl End-Capped Vinyltrimethoxysilane Oligomer/Sand Composites Possessing Superoleophilic/Superhydrophobic Characteristic: Application to Oil/Water Separation and Selective Removal of Fluorinated Aromatic Compounds from Aqueous Methanol Solution","authors":"H. Sawada, Kako Tono, Katsumi Yamashita","doi":"10.4236/ojcm.2022.121005","DOIUrl":"https://doi.org/10.4236/ojcm.2022.121005","url":null,"abstract":"Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [R F -(CH 2 -CHSi(OMe) 3 ) n -R F : n = 2, 3, R F = CF(CF 3 )OC 3 F 7 : R F -(VM) n -R F ], was applied to the facile preparation of the corresponding oligomer/sand (Ottawa sand: OS) composites [R F -(VM-SiO 3/2 ) n -R F /OS] through the sol-gel reaction of the oligomer in the presence of micro-sized OS particles (590 - 840 μm) under alkaline conditions at room temperature. FE-SEM (Field Emission Scanning Electron Micrograph) images showed that the obtained composites con-sist of the R F -(VM-SiO 3/2 ) n -R F oligomeric nanoparticles and the micro-sized OS particles. Interestingly, the R F -(VM-SiO 3/2 ) n -R F /OS composites thus obtained can provide the superoleophilic/superhydrophobic characteristic on the composite surface, applying to the separation of not only the nated micro-sized controlled silica gel (μ-SiO 2 ) composites (average particle size: 9.5 μm), which were prepared under similar conditions. In addition to the separation of oil/water, the fluorinated OS composites provided higher and more selective removal ability for the fluorinated aromatic compounds from aqueous solutions than that of the μ-SiO 2 composites.","PeriodicalId":57868,"journal":{"name":"复合材料期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70624818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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