The Experts below are selected from a list of 1947 Experts worldwide ranked by ideXlab platform
Mitsugu Todo - One of the best experts on this subject based on the ideXlab platform.
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effect of Fiber surface Treatment and Fiber loading on the properties of bagasse Fiber reinforced unsaturated polyester composites
Composites Science and Technology, 2008Co-Authors: Vannaladsaysy Vilay, M Mariatti, Mat R Taib, Mitsugu TodoAbstract:Abstract Bagasse Fiber is a residue of a sugarcane milling process. In this research, bagasse Fiber has been used as reinforcing component for unsaturated polyester resin (USP) to open up further possibilities in waste management. The chemical Treatments using sodium hydroxide (NaOH) and acrylic acid (AA) were carried out to modify the Fiber properties. The effect of different Fiber Treatment and the Fiber content on the composite properties were investigated. At different Fiber loadings, AA treated Fiber composites shows better mechanical properties compared to those of NaOH treated Fiber composites. SEM investigations show that the surface modifications improve the Fiber–matrix interaction. Moreover, the storage modulus of dynamic mechanical analysis (DMA) indicated that NaOH and AA treated Fibers based composites enhance the storage modulus of the composites. From water absorption study, it was observed that the treated Fiber composites show lower water absorption properties compared to those of untreated Fiber based composites.
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Effect of Fiber surface Treatment and Fiber loading on the properties of bagasse Fiber-reinforced unsaturated polyester composites
Composites Science and Technology, 2008Co-Authors: Vannaladsaysy Vilay, R. Mat Taib, M Mariatti, Mitsugu TodoAbstract:Bagasse Fiber is a residue of a sugarcane milling process. In this research, bagasse Fiber has been used as reinforcing component for unsaturated polyester resin (USP) to open up further possibilities in waste management. The chemical Treatments using sodium hydroxide (NaOH) and acrylic acid (AA) were carried out to modify the Fiber properties. The effect of different Fiber Treatment and the Fiber content on the composite properties were investigated. At different Fiber loadings, AA treated Fiber composites shows better mechanical properties compared to those of NaOH treated Fiber composites. SEM investigations show that the surface modifications improve the Fiber-matrix interaction. Moreover, the storage modulus of dynamic mechanical analysis (DMA) indicated that NaOH and AA treated Fibers based composites enhance the storage modulus of the composites. From water absorption study, it was observed that the treated Fiber composites show lower water absorption properties compared to those of untreated Fiber based composites. © 2007 Elsevier Ltd. All rights reserved.
Manjusri Misra - One of the best experts on this subject based on the ideXlab platform.
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Novel biocomposites from native grass and soy based bioplastic: Processing and properties evaluation
Industrial and Engineering Chemistry Research, 2005Co-Authors: Wenhua Liu, Amar K. Mohanty, Lawrence T. Drzal, Manjusri MisraAbstract:Indian grass Fiber reinforced soy based biocomposites were fabricated by using twin-screw extrusion and injection molding technology. The thermal and mechanical properties and the morphology of the biocomposites were evaluated using a dynamic mechanical analyzer (DMA), a universal testing system (UTS), and an environmental scanning electron microscope (ESEM). Raw Indian grass Fiber improved the tensile and flexural properties as well as the heat deflection temperature (HDT), but did not improve the impact strength of the biocomposites. The impact fracture of the raw Indian grass Fiber reinforced biocomposites was found to occur on the outer surface of the Fiber, due to intrinsic differences in the morphological structure between the outer and inner surfaces of the grass Fiber. Treatment of the Indian grass Fiber with an alkali solution significantly improved the tensile, impact, and flexural strengths of its reinforced soy based biocomposites, presumably due to the homogeneous dispersion of Fibers in the matrix and the enhanced aspect ratio of the Fibers.
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influence of Fiber surface Treatment on properties of indian grass Fiber reinforced soy protein based biocomposites
Polymer, 2004Co-Authors: Amar K. Mohanty, Lawrence T. Drzal, Per Askeland, Manjusri MisraAbstract:The influence of Fiber Treatment on the properties of biocomposites derived from grass Fiber and soy based bioplastic was investigated with environmental scanning electron microscopy, thermal and mechanical properties measurements. Grass Fibers were treated with alkali solution that reduced the inter-fibrillar region of the Fiber by removing hemicellulose and lignin, which reduce the cementing force between fibrils. This led to a more homogenous dispersion of the bioFiber in the matrix as well as increase in the aspect ratio of the Fiber in the composite, resulting in an improvement in Fiber reinforcement efficiency. This led to enhancement in mechanical properties including tensile and flexural properties as well as impact strength. Additionally, the alkali solution Treatment increased the concentration of hydroxyl groups on the surface, which led to a better interaction between the Fibers and the matrix.
Vannaladsaysy Vilay - One of the best experts on this subject based on the ideXlab platform.
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effect of Fiber surface Treatment and Fiber loading on the properties of bagasse Fiber reinforced unsaturated polyester composites
Composites Science and Technology, 2008Co-Authors: Vannaladsaysy Vilay, M Mariatti, Mat R Taib, Mitsugu TodoAbstract:Abstract Bagasse Fiber is a residue of a sugarcane milling process. In this research, bagasse Fiber has been used as reinforcing component for unsaturated polyester resin (USP) to open up further possibilities in waste management. The chemical Treatments using sodium hydroxide (NaOH) and acrylic acid (AA) were carried out to modify the Fiber properties. The effect of different Fiber Treatment and the Fiber content on the composite properties were investigated. At different Fiber loadings, AA treated Fiber composites shows better mechanical properties compared to those of NaOH treated Fiber composites. SEM investigations show that the surface modifications improve the Fiber–matrix interaction. Moreover, the storage modulus of dynamic mechanical analysis (DMA) indicated that NaOH and AA treated Fibers based composites enhance the storage modulus of the composites. From water absorption study, it was observed that the treated Fiber composites show lower water absorption properties compared to those of untreated Fiber based composites.
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Effect of Fiber surface Treatment and Fiber loading on the properties of bagasse Fiber-reinforced unsaturated polyester composites
Composites Science and Technology, 2008Co-Authors: Vannaladsaysy Vilay, R. Mat Taib, M Mariatti, Mitsugu TodoAbstract:Bagasse Fiber is a residue of a sugarcane milling process. In this research, bagasse Fiber has been used as reinforcing component for unsaturated polyester resin (USP) to open up further possibilities in waste management. The chemical Treatments using sodium hydroxide (NaOH) and acrylic acid (AA) were carried out to modify the Fiber properties. The effect of different Fiber Treatment and the Fiber content on the composite properties were investigated. At different Fiber loadings, AA treated Fiber composites shows better mechanical properties compared to those of NaOH treated Fiber composites. SEM investigations show that the surface modifications improve the Fiber-matrix interaction. Moreover, the storage modulus of dynamic mechanical analysis (DMA) indicated that NaOH and AA treated Fibers based composites enhance the storage modulus of the composites. From water absorption study, it was observed that the treated Fiber composites show lower water absorption properties compared to those of untreated Fiber based composites. © 2007 Elsevier Ltd. All rights reserved.
Andrzej K. Bledzki - One of the best experts on this subject based on the ideXlab platform.
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Polyester-Kenaf Composites: Effects of Alkali Fiber Treatment and Toughening of Matrix Using Liquid Natural Rubber
Journal of Composite Materials, 2010Co-Authors: Sahrim Ahmad, Rozaidi Rasid, Noor Najmi Bonnia, Ismail Zainol, Abdullah Al Mamun, Andrzej K. BledzkiAbstract:In this study, polyesterkenaf Fiber composites were prepared by adding various percentages of kenaf Fiber in unsaturated polyester resin and subse- quently cross-linked using methyl ethyl ketone peroxide and the accelerator cobalt octanoate. Liquid natural rubber (LNR) (3%) was added as a toughening agent. Kenaf Fibers were treated with sodium hydroxide solution to improve the interfacial bonding between the Fiber and the matrix. The mechanical properties of the com- posites were evaluated by impact and flexural testing. Environmental stress cracking resistance (ESCR) of composites in acid and base medium was also studied. Bonding mechanisms were assessed by scanning electron microscope and Fourier transform infrared analysis. It was found that the addition of LNR increased the impact strength and fracture toughness. Alkali Fiber Treatment was found to provide better impact and flexural strengths to the composites. Measurement of ESCR shows that the composite with acid medium has the fastest diffusion rate, followed by that with base medium, and then without medium.
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the influence of Fiber surface Treatment on the mechanical properties of jute polypropylene composites
Composites Part A-applied Science and Manufacturing, 1997Co-Authors: Jochen Gassan, Andrzej K. BledzkiAbstract:This article concerns the effectiveness of MAH-PP copolymers (graft copolymer of PP and maleic anhydride) as coupling agents in jute-polypropylene composites. The Fiber Treatment time and the MAH-PP concentration influenced the mechanical properties of the composites. Flexural strength of the composites with MAH-PP treated Fibers was higher than that of unmodified Fibers, and increased with Fiber loading. The cyclic-dynamic values at an increasing load indicated that the coupling agent reduces the progress of damage. Dynamic strength (dynamic failure stress at load increasing test) of the MAH-PP modified composites is therefore raised by about 40%. SEM investigations confirm that the increase in properties is caused by improved Fiber-matrix adhesion. There was less inclination for Fibers to pull out of the matrix.
Y Nakayama - One of the best experts on this subject based on the ideXlab platform.
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SU-E-T-240: Accuracy of Dose Attenuation Correction for a 6D Carbon Fiber Treatment Couch Using a Virtual Couch Technique Integrated into a Treatment Planning System.
Medical physics, 2012Co-Authors: K Shioiri, M Kurooka, S Yoshino, W Maehana, M Itou, Y Kusano, M Onodera, T Nonaka, Y NakayamaAbstract:A commercial 6D carbon Fiber radiotherapy Treatment couch (Imaging Couch Top, BrainLAB) has recently been reported to attenuate photon beams and increase skin dose. To prevent skin toxicity and ensure the target dose, it is important to correct the attenuation properties of the Treatment couch with the Treatment planning system (TPS). In this study, we evaluated the accuracy of dose attenuation correction by a virtual couch technique integrated into the TPS. A virtual couch was modeled in the TPS (Eclipse v10.0, Varian). The CT value of the virtual couch was assigned with the CT value of the kilovoltage-CT images of the Treatment couch. A phantom consisting of several plastic water slabs was created. We selected an evaluation point within the phantom on the couch structure at a 9 cm depth from the couch surface, which was placed at the isocenter. The doses at this point were calculated and measured at several gantry angles, from 120 degree to 240 degree at 10 degree steps, and each field size was 10 cm × 10 cm. The prescribed dose was 100 monitor units for 6/10 MV photon beams and 6 MV-SRS mode (Trilogy Tx, Varian). Dose measurements were performed with an ion chamber. The largest difference between measured and calculated doses was 3.3% for a gantry angle of 120 degree and 6 MV-SRS mode. The average dose difference was within 1.6% for all gantry angles and photon beams. In the case without attenuation correction, the largest difference was 8.2% and the average difference was 5.2%. Use of the virtual couch technique in TPS accomplished sufficient accuracy for dose attenuation correction of the 6D carbon Fiber Treatment couch, and it is an effective method for clinical use. © 2012 American Association of Physicists in Medicine.
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SU‐E‐T‐240: Accuracy of Dose Attenuation Correction for a 6D Carbon Fiber Treatment Couch Using a Virtual Couch Technique Integrated into a Treatment Planning System
Medical Physics, 2012Co-Authors: K Shioiri, M Kurooka, S Yoshino, W Maehana, M Itou, Y Kusano, M Onodera, T Nonaka, Y NakayamaAbstract:Purpose: A commercial 6D carbon Fiber radiotherapy Treatment couch (Imaging Couch Top, BrainLAB) has recently been reported to attenuate photon beams and increase skindose. To prevent skin toxicity and ensure the target dose, it is important to correct the attenuation properties of the Treatment couch with the Treatment planning system (TPS). In this study, we evaluated the accuracy of dose attenuation correction by a virtual couch technique integrated into the TPS. Methods: A virtual couch was modeled in the TPS (Eclipse v10.0, Varian). The CT value of the virtual couch was assigned with the CT value of the kilovoltage‐CT images of the Treatment couch. A phantom consisting of several plastic water slabs was created. We selected an evaluation point within the phantom on the couch structure at a 9 cm depth from the couch surface, which was placed at the isocenter. The doses at this point were calculated and measured at several gantry angles, from 120 degree to 240 degree at 10 degree steps, and each field size was 10 cm × 10 cm. The prescribed dose was 100 monitor units for 6/10 MV photon beams and 6 MV‐SRS mode (Trilogy Tx, Varian). Dose measurements were performed with an ion chamber.Results: The largest difference between measured and calculated doses was 3.3% for a gantry angle of 120 degree and 6 MV‐SRS mode. The average dose difference was within 1.6% for all gantry angles and photon beams. In the case without attenuation correction, the largest difference was 8.2% and the average difference was 5.2%. Conclusions: Use of the virtual couch technique in TPS accomplished sufficient accuracy for dose attenuation correction of the 6D carbon Fiber Treatment couch, and it is an effective method for clinical use.