The Experts below are selected from a list of 4224 Experts worldwide ranked by ideXlab platform
Shinji Ochi - One of the best experts on this subject based on the ideXlab platform.
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Tensile Properties of Bamboo Fiber Reinforced Biodegradable Plastics
International Journal of Composite Materials, 2012Co-Authors: Shinji OchiAbstract:This paper describes tensile properties of Bamboo Fiber reinforced biodegradable plastics. The unidirectional biodegradable composites were made from Bamboo Fiber bundles and a starch-based biodegradable resin. The tensile strengths of the composites increased with increasing Fiber content up to 70%. The composites possessed extremely high tensile strengths of 265 MPa. The fabrication with emulsion-type biodegradable resin contributed to reduction in voids and Fiber contacts in the composites. Moreover, heat resistance of Bamboo Fibers and Bamboo Fiber reinforced plastics was in- vestigated. As results, tensile strength of both Bamboo Fiber and Bamboo Fiber reinforced plastics decreased at 160℃.
Hitoshi Takagi - One of the best experts on this subject based on the ideXlab platform.
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strength evaluation of cross ply green composite laminates reinforced by Bamboo Fiber
Composites Part B-engineering, 2016Co-Authors: Romi Sukmawan, Hitoshi Takagi, Antonio Norio NakagaitoAbstract:Abstract Steam exploded Bamboo (SEB) Fibers were treated with alkali solution to remove lignin and hemicelluloses and also to increase the compatibility with biodegradable matrix resin. The Fibers were processed by simple hand-lay-up method and hot pressed using dispersion-type biodegradable poly lactic acid (PLA) resin to produce a PLA/Bamboo Fiber cross-ply (0/90) s laminate composites, whose Fiber content varied from 17 up to 68 wt.%. The intermolecular interaction among Bamboo Fiber and PLA matrix was discussed based on Fourier transform infrared (FTIR) analysis. The results showed that the tensile strength of alkali treated Bamboo Fiber was comparable with those of common strong natural Fibers such as hemp and flax Fibers. The composites' strength was similar to that of ordinary glass Fiber-reinforced plastics laminate and the specific strength was three times higher than that of mild steel. It was also found that the cross-ply (0/90) s SEB/PLA laminate has the same cracking character as the common cross-ply laminates based on carbon or glass Fibers.
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Bamboo Fiber polypropylene composites: Effect of Fiber treatment and nano clay on mechanical and thermal properties
Journal of Vinyl & Additive Technology, 2014Co-Authors: Rezaur Rahman, Dayang Maryani Awang Hashim, Saiful Islam, Sinin Hamdan, Hitoshi TakagiAbstract:In the current study, Bamboo Fibers were modified with sodium meta-periodate in order to improve the mechanical and thermal properties of the Bamboo-clay-polypropylene (PP) composites. Both raw and treated Bamboo Fibers were used in the manufacturing of the composites. The mechanical and thermal properties of the composites from modified Bamboo Fibers were found to increase considerably compared with those of untreated Fibers. Tensile strengths of (raw Bamboo Fiber)/PP, (raw Bamboo Fiber-clay)/PP, and (treated Bamboo Fiber-clay)/PP composites showed a decreasing trend with increasing Fiber loadings. However, the values for the chemically modified (Bamboo Fiber)-clay-PP composite at all mixing ratios were found to be higher than that of the original PP. The scanning electron micrographs showed that interfacial bonding between the treated Fiber-clay and matrix has significantly improved. It was determined that better dispersion of the filler into matrix occurred on 5% clay addition and Fiber treatment
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Mechanical Characterization of Bamboo Fiber-Reinforced Green Composites
Key Engineering Materials, 2013Co-Authors: Hitoshi Takagi, Toshihiro FujiiAbstract:This paper deals with the mechanical behavior of Bamboo Fiber-reinforced biodegradable composites (green composites). A starch-based, dispersion type biodegradable resin was used as matrix polymer, and this matrix was reinforced by long Bamboo Fibers which were extracted by a steam-explosion method. The experimental results showed that the developed green composites possessed the flexural and tensile strength of 263 MPa and 270 MPa, respectively. The mechanical properties of the green composites were evaluated as a function of Fiber content. It is found that the observed tensile strength was slightly lower than that of estimated values from the rule of the mixture. This discrepancy might be related to the misorientation of the Bamboo Fiber in the composites and to that the final fracture of composites is also governed by the presence of weak Bamboo Fiber.
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Thermal conductivity of PLA-Bamboo Fiber composites
Advanced Composite Materials, 2007Co-Authors: Hitoshi Takagi, Shuhei Kako, Koji Kusano, Akiharu OusakaAbstract:'Green' composites were fabricated from poly lactic acid (PLA) and Bamboo Fibers by using a conventional hot pressing method. The insulating properties of the PLA-Bamboo Fiber 'green' composites were evaluated by determination of the thermal conductivity, which was measured using a hot-wire method. The thermal conductivity values were compared with theoretical estimations. It was demonstrated that thermal conductivity of PLA-Bamboo Fiber 'green' composites is smaller than that of conventional composites, such as glass Fiber reinforced plastics (GFRPs) and carbon Fiber reinforced plastics (CFRPs). The thermal conductivity of PLA-Bamboo Fiber 'green' composites was significantly influenced by their density, and was in fair agreement with theoretical predictions based on Russell's model. The PLA-Bamboo Fiber composites have low thermal conductivity comparable with that of woods.
Hiroyuki Hamada - One of the best experts on this subject based on the ideXlab platform.
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Effects of Compatibilizers on Properties of Polypropylene/Bamboo Fiber Composites
Key Engineering Materials, 2017Co-Authors: Jitlada Boonlertsamut, Rutchaneekorn Wongpajan, Supaphorn Thumsorn, Hiroyuki HamadaAbstract:Bamboo Fiber (BF) reinforced thermoplastic material composites were prepared in this study. polypropylene (PP) was compounded with Bamboo Fiber in a twin screw extruder at Bamboo Fiber contents of 0-30 wt% with polyethylene grafted maleic anhydride (PE-g-MA) as modifying agent. PP/Bamboo Fiber composites were to dumbbell specimens by injection molding process. The effect of Bamboo Fiber contents on properties of the composites was investigated. Tensile and storage modulus of the composites increased when increasing Bamboo Fiber contents. It can be noted that Bamboo Fiber promoted crystallization and enhanced crystallinity of PP in the composites, which improved the composites mechanical performance. On the contrary, tensile strength of the PP/BF composites was almost unchanged. Nevertheless, it was considering that the level of interaction between Bamboo Fiber and PP could be enhanced at higher contents of PE-g-MA. It can be noted that fracture toughness of the PP/BF composites was maintained at the BF contents of 10 wt%, which was attributed to the good interaction between Bamboo Fiber and PP matrix with the addition of PE-g-MA.
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Crystallization kinetics and thermal resistance of Bamboo Fiber reinforced biodegradable polymer composites
2014Co-Authors: Supaphorn Thumsorn, Natee Srisawat, Sommai Pivsa-art, Hiroyuki HamadaAbstract:Bamboo Fiber reinforced biodegradable polymer composites were prepared in this study. Biodegradable poly(butylene succinate) (PBS) was blended with Bamboo Fiber in a twin screw extruder with varied Bamboo content from 20-0wt%. PBS/Bamboo Fiber composites were fabricated by compression molding process. The effect of Bamboo Fiber contents on properties of the composites was investigated. Non-isothermal crystallization kinetic study of the composites was investigated based on Avrami equation. The kinetic parameters indicated that Bamboo Fiber acted as heterogeneous nucleation and enhanced crystallinity of the composites. Bamboo Fiber was well dispersed on PBS matrix and good adhered with the matrix. Tensile strength of the composites slightly deceased with adding Bamboo Fiber. However, tensile modulus and impact strength of the composites increased when increasing Bamboo Fiber contents. It can be noted that Bamboo Fiber promoted crystallization and crystallinity of PBS in the composites. Therefore, the compo...
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Mechanical properties of carbonized Bamboo Fiber reinforced biodegradable polymer composite.
2004Co-Authors: H. Matsui, Kazuo Kitagawa, Takeshi Semba, H. Okumura, Umaru Semo Ishiaku, Hiroyuki HamadaAbstract:The mechanical properties of biodegradable polymer composite with carbonized Bamboo Fibers were evaluated. Poly (butylene succinate) (PBS) was used as the biodegradable plastic matrix while the condition of carbonization was varied. By increasing Fiber content, tensile modulus was confirmed to increase. In particular, the tensile modulus of composite filled with semi-carbonized Bamboo displayed higher values than the uncarbonized Bamboo Fibers composite. The values of tensile strength decreased according to the increase of Fiber content; however, the carbonized Bamboo Fiber composites experienced less decrease than the uncarbonized ones. The surface resistivity of carbonized Bamboo Fiber composites was lower than that of Bamboo Fibers and also decreased with the increase in Fiber content in each case.
Mainul Islam - One of the best experts on this subject based on the ideXlab platform.
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fracture behaviour of Bamboo Fiber reinforced epoxy composites
Composites Part B-engineering, 2017Co-Authors: Ziaullah Khan, B F Yousif, Mainul IslamAbstract:Abstract In this work, experimental and numerical study on fracture behaviour of Bamboo Fiber reinforced epoxy composites is presented. Optimum NaOH concentration for treatment of Bamboo Fibers was determined through single Fiber tensile test and microscopic inspection of Fiber surface through SEM (Scanning Electron Microscopy). The results demonstrated that 6% NaOH treated Fibers showed maximum ultimate tensile strength of 234 MPa. Single Fiber fragmentation test results showed that interfacial adhesion is improved by treating Fibers with 6% NaOH. Bamboo Fiber reinforced epoxy composite was fabricated using 6% NaOH treated Bamboo Fibers of length 10 mm, 20 mm and 25 mm with random distribution in epoxy matrix. Mode-I plane strain fracture toughness (K IC ) of Bamboo Fiber reinforced epoxy composites was investigated based on Linear Elastic Fracture Mechanics (LEFM) approach as per ASTM D5045 . Results showed that composites having 25 mm length of Fibers had the largest K IC value of 2.67 MPa.m 1/2 , whereas composites with 10 mm Fiber length showed lowest value of fracture toughness K IC of 1.61 MPa.m 1/2 . SEM results revealed that Fiber breakage, matrix cracking, Fiber matrix debonding and Fiber pull out are major causes of failure of composite. Simulation/modelling of crack propagation in CT (Compact Tension) specimen by using FEA software ABAQUS ® showed similar results as experimental values.
Toru Fujii - One of the best experts on this subject based on the ideXlab platform.
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multi scale hybrid biocomposite processing and mechanical characterization of Bamboo Fiber reinforced pla with microfibrillated cellulose
Composites Part A-applied Science and Manufacturing, 2009Co-Authors: Kazuya Okubo, Toru Fujii, Erik T ThostensonAbstract:In this research we develop novel hybrid biocomposites based upon a biodegradable poly(lactic acid) (PLA) matrix reinforced with microfibrillated cellulose (MFC) and Bamboo Fiber bundles. Due to the relative difference in scale between microfibrillated cellulose and Bamboo, a hierarchy of reinforcement is created where Bamboo Fiber bundles are the primary load-carrying reinforcement and cellulose creates an interphase in the polymer matrix around the Bamboo Fiber that prevents sudden crack growth. The influence of MFC dispersion on the properties of the PLA matrix was investigated and substantial improvements in the strain energy until fracture observed. By adding just 1 wt% of MFC with a high degree of dispersion an increase in fracture energy of nearly 200% was obtained. In the hybrid Bamboo/MFC/PLA composites there is also a dramatic change in the fracture morphology around the Bamboo Fiber bundles.
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Bamboo Fiber Reinforced Plastics
Natural Fibers Plastics and Composites, 2004Co-Authors: Hiroshi Yamaguchi, Toru FujiiAbstract:Natural Fiber composites have already become commercially available in the fabrication of some industrial materials. The recent development of Bamboo Fiber reinforced composites represents a substantial addition to the growing number of these eco-composites. Of particular importance are Bamboo Fibers as reinforcing material for thermoset plastics. The method of preparation of Bamboo Fibers and their mechanical properties are introduced together with basic rheological behavior. The strength of natural Fibers is lower than that of glass Fibers, water absorption is higher and the cost of biocomposites is almost equal to that of glass Fiber composites.
