The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
J. Jayaramudu - One of the best experts on this subject based on the ideXlab platform.
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preparation and properties of biodegradable films from Sterculia urens short fiber cellulose green composites
Carbohydrate Polymers, 2013Co-Authors: J. Jayaramudu, Kokkarachedu Varaprasad, Suprakas Sinha Ray, Siva Mohan G Reddy, E R Sadiku, Varada A RajuluAbstract:The development of commercially viable "green products", based on natural resources for the matrices and reinforcements, in a wide range of applications, is on the rise. The present paper focuses on Sterculia urens short fiber reinforced pure cellulose matrix composite films. The morphologies of the untreated and 5% NaOH (alkali) treated S. urens fibers were observed by SEM. The effect of 5% NaOH treated S. urens fiber (5, 10, 15 and 20% loading) on the mechanical properties and thermal stability of the composites films is discussed. This paper presents the developments made in the area of biodegradable S. urens short fiber/cellulose (SUSF/cellulose) composite films, buried in the soil and later investigated by the (POM), before and after biodegradation has taken place. SUSF/cellulose composite films have great potential in food packaging and for medical applications.
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Structure and properties of poly (lactic acid)/Sterculia urens uniaxial fabric biocomposites
Carbohydrate polymers, 2013Co-Authors: J. Jayaramudu, G. Siva Mohan Reddy, Kokkarachedu Varaprasad, Emmanuel Rotimi Sadiku, Suprakas Sinha Ray, A. V. RajuluAbstract:Uniaxial cellulose fabric Sterculia urens reinforced poly (lactic acid) (PLA) matrix biocomposites were prepared by a two-roll mill. In order to assess the suitability of Sterculia fabric as reinforcement for PLA matrix, the PLA/Sterculia fabric biocomposites were prepared. Tensile parameters, such as maximum stress, Young's modulus and elongation-at-break, were determined using the Universal Testing Machine. The effect of alkali treatment and silane-coupling agent on the tensile properties of PLA-based biocomposites was studied. The results of thermogravimetric analysis show that uniaxial treatment of the fabric can improve the degradation temperature of the biocomposites. Moreover, morphological studies by scanning electron microscopy confirmed that better adhesion between the uniaxial fabric and the matrix was achieved. It was established that standard PLA resins are suitable for the manufacture of S. urens uniaxial fabric reinforced biocomposites with excellent engineering properties, useful for food packaging.
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Preparation and properties of biodegradable films from Sterculia urens short fiber/cellulose green composites.
Carbohydrate polymers, 2013Co-Authors: J. Jayaramudu, G. Siva Mohan Reddy, Kokkarachedu Varaprasad, Emmanuel Rotimi Sadiku, Suprakas Sinha Ray, A. V. RajuluAbstract:The development of commercially viable "green products", based on natural resources for the matrices and reinforcements, in a wide range of applications, is on the rise. The present paper focuses on Sterculia urens short fiber reinforced pure cellulose matrix composite films. The morphologies of the untreated and 5% NaOH (alkali) treated S. urens fibers were observed by SEM. The effect of 5% NaOH treated S. urens fiber (5, 10, 15 and 20% loading) on the mechanical properties and thermal stability of the composites films is discussed. This paper presents the developments made in the area of biodegradable S. urens short fiber/cellulose (SUSF/cellulose) composite films, buried in the soil and later investigated by the (POM), before and after biodegradation has taken place. SUSF/cellulose composite films have great potential in food packaging and for medical applications.
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Tensile properties of polymethyl methacrylate coated natural fabric Sterculia urens
Materials Letters, 2009Co-Authors: J. Jayaramudu, B. R. Guduri, A. V. RajuluAbstract:Abstract The newly identified natural fabric from the tree of Sterculia urens was coated with Polymethyl methacrylate. The tensile properties of both the uncoated and Polymethyl methacrylate coated fabrics were studied. The tensile parameters such as maximum stress, Young's modulus and % elongation at break were determined using a Universal Testing Machine. The effect of alkali treatment and the Polymethyl methacrylate coating on tensile properties of the fabric was studied. The morphology of the fabric before and after alkali treatment and Polymethyl methacrylate coating was studied using the scanning electron microscopy and polarized optical microscopic techniques respectively. The improvement in the tensile properties on Polymethyl methacrylate coating was attributed to the filling up of the void regions of the uniaxial fabrics with Polymethyl methacrylate facilitating continuity.
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Characterization of Natural Fabric Sterculia urens
International Journal of Polymer Analysis and Characterization, 2009Co-Authors: J. Jayaramudu, B. R. Guduri, A. V. RajuluAbstract:Abstract The newly identified natural fabric from the tree Sterculia urens was characterized by chemical, FT-IR, X-ray and thermogravimetric, tensile test, and microscopic methods. The effect of alkali treatment of the fabric on its properties was also investigated. On alkali treatment, the amorphous hemicellulose was found to be eliminated to a large extent. The improvement of properties of this fabric on alkali treatment was attributed to the lowering of its amorphous hemicellulose content.
A. V. Rajulu - One of the best experts on this subject based on the ideXlab platform.
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Structure and properties of poly (lactic acid)/Sterculia urens uniaxial fabric biocomposites
Carbohydrate polymers, 2013Co-Authors: J. Jayaramudu, G. Siva Mohan Reddy, Kokkarachedu Varaprasad, Emmanuel Rotimi Sadiku, Suprakas Sinha Ray, A. V. RajuluAbstract:Uniaxial cellulose fabric Sterculia urens reinforced poly (lactic acid) (PLA) matrix biocomposites were prepared by a two-roll mill. In order to assess the suitability of Sterculia fabric as reinforcement for PLA matrix, the PLA/Sterculia fabric biocomposites were prepared. Tensile parameters, such as maximum stress, Young's modulus and elongation-at-break, were determined using the Universal Testing Machine. The effect of alkali treatment and silane-coupling agent on the tensile properties of PLA-based biocomposites was studied. The results of thermogravimetric analysis show that uniaxial treatment of the fabric can improve the degradation temperature of the biocomposites. Moreover, morphological studies by scanning electron microscopy confirmed that better adhesion between the uniaxial fabric and the matrix was achieved. It was established that standard PLA resins are suitable for the manufacture of S. urens uniaxial fabric reinforced biocomposites with excellent engineering properties, useful for food packaging.
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Preparation and properties of biodegradable films from Sterculia urens short fiber/cellulose green composites.
Carbohydrate polymers, 2013Co-Authors: J. Jayaramudu, G. Siva Mohan Reddy, Kokkarachedu Varaprasad, Emmanuel Rotimi Sadiku, Suprakas Sinha Ray, A. V. RajuluAbstract:The development of commercially viable "green products", based on natural resources for the matrices and reinforcements, in a wide range of applications, is on the rise. The present paper focuses on Sterculia urens short fiber reinforced pure cellulose matrix composite films. The morphologies of the untreated and 5% NaOH (alkali) treated S. urens fibers were observed by SEM. The effect of 5% NaOH treated S. urens fiber (5, 10, 15 and 20% loading) on the mechanical properties and thermal stability of the composites films is discussed. This paper presents the developments made in the area of biodegradable S. urens short fiber/cellulose (SUSF/cellulose) composite films, buried in the soil and later investigated by the (POM), before and after biodegradation has taken place. SUSF/cellulose composite films have great potential in food packaging and for medical applications.
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Tensile properties of polymethyl methacrylate coated natural fabric Sterculia urens
Materials Letters, 2009Co-Authors: J. Jayaramudu, B. R. Guduri, A. V. RajuluAbstract:Abstract The newly identified natural fabric from the tree of Sterculia urens was coated with Polymethyl methacrylate. The tensile properties of both the uncoated and Polymethyl methacrylate coated fabrics were studied. The tensile parameters such as maximum stress, Young's modulus and % elongation at break were determined using a Universal Testing Machine. The effect of alkali treatment and the Polymethyl methacrylate coating on tensile properties of the fabric was studied. The morphology of the fabric before and after alkali treatment and Polymethyl methacrylate coating was studied using the scanning electron microscopy and polarized optical microscopic techniques respectively. The improvement in the tensile properties on Polymethyl methacrylate coating was attributed to the filling up of the void regions of the uniaxial fabrics with Polymethyl methacrylate facilitating continuity.
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Characterization of Natural Fabric Sterculia urens
International Journal of Polymer Analysis and Characterization, 2009Co-Authors: J. Jayaramudu, B. R. Guduri, A. V. RajuluAbstract:Abstract The newly identified natural fabric from the tree Sterculia urens was characterized by chemical, FT-IR, X-ray and thermogravimetric, tensile test, and microscopic methods. The effect of alkali treatment of the fabric on its properties was also investigated. On alkali treatment, the amorphous hemicellulose was found to be eliminated to a large extent. The improvement of properties of this fabric on alkali treatment was attributed to the lowering of its amorphous hemicellulose content.
Suprakas Sinha Ray - One of the best experts on this subject based on the ideXlab platform.
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preparation and properties of biodegradable films from Sterculia urens short fiber cellulose green composites
Carbohydrate Polymers, 2013Co-Authors: J. Jayaramudu, Kokkarachedu Varaprasad, Suprakas Sinha Ray, Siva Mohan G Reddy, E R Sadiku, Varada A RajuluAbstract:The development of commercially viable "green products", based on natural resources for the matrices and reinforcements, in a wide range of applications, is on the rise. The present paper focuses on Sterculia urens short fiber reinforced pure cellulose matrix composite films. The morphologies of the untreated and 5% NaOH (alkali) treated S. urens fibers were observed by SEM. The effect of 5% NaOH treated S. urens fiber (5, 10, 15 and 20% loading) on the mechanical properties and thermal stability of the composites films is discussed. This paper presents the developments made in the area of biodegradable S. urens short fiber/cellulose (SUSF/cellulose) composite films, buried in the soil and later investigated by the (POM), before and after biodegradation has taken place. SUSF/cellulose composite films have great potential in food packaging and for medical applications.
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Structure and properties of poly (lactic acid)/Sterculia urens uniaxial fabric biocomposites
Carbohydrate polymers, 2013Co-Authors: J. Jayaramudu, G. Siva Mohan Reddy, Kokkarachedu Varaprasad, Emmanuel Rotimi Sadiku, Suprakas Sinha Ray, A. V. RajuluAbstract:Uniaxial cellulose fabric Sterculia urens reinforced poly (lactic acid) (PLA) matrix biocomposites were prepared by a two-roll mill. In order to assess the suitability of Sterculia fabric as reinforcement for PLA matrix, the PLA/Sterculia fabric biocomposites were prepared. Tensile parameters, such as maximum stress, Young's modulus and elongation-at-break, were determined using the Universal Testing Machine. The effect of alkali treatment and silane-coupling agent on the tensile properties of PLA-based biocomposites was studied. The results of thermogravimetric analysis show that uniaxial treatment of the fabric can improve the degradation temperature of the biocomposites. Moreover, morphological studies by scanning electron microscopy confirmed that better adhesion between the uniaxial fabric and the matrix was achieved. It was established that standard PLA resins are suitable for the manufacture of S. urens uniaxial fabric reinforced biocomposites with excellent engineering properties, useful for food packaging.
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Preparation and properties of biodegradable films from Sterculia urens short fiber/cellulose green composites.
Carbohydrate polymers, 2013Co-Authors: J. Jayaramudu, G. Siva Mohan Reddy, Kokkarachedu Varaprasad, Emmanuel Rotimi Sadiku, Suprakas Sinha Ray, A. V. RajuluAbstract:The development of commercially viable "green products", based on natural resources for the matrices and reinforcements, in a wide range of applications, is on the rise. The present paper focuses on Sterculia urens short fiber reinforced pure cellulose matrix composite films. The morphologies of the untreated and 5% NaOH (alkali) treated S. urens fibers were observed by SEM. The effect of 5% NaOH treated S. urens fiber (5, 10, 15 and 20% loading) on the mechanical properties and thermal stability of the composites films is discussed. This paper presents the developments made in the area of biodegradable S. urens short fiber/cellulose (SUSF/cellulose) composite films, buried in the soil and later investigated by the (POM), before and after biodegradation has taken place. SUSF/cellulose composite films have great potential in food packaging and for medical applications.
Kokkarachedu Varaprasad - One of the best experts on this subject based on the ideXlab platform.
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preparation and properties of biodegradable films from Sterculia urens short fiber cellulose green composites
Carbohydrate Polymers, 2013Co-Authors: J. Jayaramudu, Kokkarachedu Varaprasad, Suprakas Sinha Ray, Siva Mohan G Reddy, E R Sadiku, Varada A RajuluAbstract:The development of commercially viable "green products", based on natural resources for the matrices and reinforcements, in a wide range of applications, is on the rise. The present paper focuses on Sterculia urens short fiber reinforced pure cellulose matrix composite films. The morphologies of the untreated and 5% NaOH (alkali) treated S. urens fibers were observed by SEM. The effect of 5% NaOH treated S. urens fiber (5, 10, 15 and 20% loading) on the mechanical properties and thermal stability of the composites films is discussed. This paper presents the developments made in the area of biodegradable S. urens short fiber/cellulose (SUSF/cellulose) composite films, buried in the soil and later investigated by the (POM), before and after biodegradation has taken place. SUSF/cellulose composite films have great potential in food packaging and for medical applications.
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Structure and properties of poly (lactic acid)/Sterculia urens uniaxial fabric biocomposites
Carbohydrate polymers, 2013Co-Authors: J. Jayaramudu, G. Siva Mohan Reddy, Kokkarachedu Varaprasad, Emmanuel Rotimi Sadiku, Suprakas Sinha Ray, A. V. RajuluAbstract:Uniaxial cellulose fabric Sterculia urens reinforced poly (lactic acid) (PLA) matrix biocomposites were prepared by a two-roll mill. In order to assess the suitability of Sterculia fabric as reinforcement for PLA matrix, the PLA/Sterculia fabric biocomposites were prepared. Tensile parameters, such as maximum stress, Young's modulus and elongation-at-break, were determined using the Universal Testing Machine. The effect of alkali treatment and silane-coupling agent on the tensile properties of PLA-based biocomposites was studied. The results of thermogravimetric analysis show that uniaxial treatment of the fabric can improve the degradation temperature of the biocomposites. Moreover, morphological studies by scanning electron microscopy confirmed that better adhesion between the uniaxial fabric and the matrix was achieved. It was established that standard PLA resins are suitable for the manufacture of S. urens uniaxial fabric reinforced biocomposites with excellent engineering properties, useful for food packaging.
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Preparation and properties of biodegradable films from Sterculia urens short fiber/cellulose green composites.
Carbohydrate polymers, 2013Co-Authors: J. Jayaramudu, G. Siva Mohan Reddy, Kokkarachedu Varaprasad, Emmanuel Rotimi Sadiku, Suprakas Sinha Ray, A. V. RajuluAbstract:The development of commercially viable "green products", based on natural resources for the matrices and reinforcements, in a wide range of applications, is on the rise. The present paper focuses on Sterculia urens short fiber reinforced pure cellulose matrix composite films. The morphologies of the untreated and 5% NaOH (alkali) treated S. urens fibers were observed by SEM. The effect of 5% NaOH treated S. urens fiber (5, 10, 15 and 20% loading) on the mechanical properties and thermal stability of the composites films is discussed. This paper presents the developments made in the area of biodegradable S. urens short fiber/cellulose (SUSF/cellulose) composite films, buried in the soil and later investigated by the (POM), before and after biodegradation has taken place. SUSF/cellulose composite films have great potential in food packaging and for medical applications.
Niranjan Patra - One of the best experts on this subject based on the ideXlab platform.
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structure property relationships in Sterculia urens polyvinyl alcohol electrospun composite nanofibres
Carbohydrate Polymers, 2015Co-Authors: Niranjan Patra, Lenka Martinová, Martin Stuchlík, Miroslav CernikAbstract:Sterculia urens (Gum Karaya) based polyvinyl alcohol (PVA) composite nanofibres have been successfully electrospun after chemical modification of S. urens to increase its solubility. The effect of deacetylated S. urens (DGK) on the morphology, structure, crystallization behaviour and thermal stability was studied for spuned fibres before and after spinning post treatment. An apparent increase in the PVA crystallinity were observed in the PVA-DGK composite nanofibres indicating S. urens induced crystallization of PVA. The pure PVA nanofibre and the nanofibres of PVA-DGK composites were introduced to post electrospinning heat treatment at 150°C for 15 min. The presence of Sterculia gum reduced the fibre diameter and distribution of the nanofibres due to the increased stretching of the fibres during spinning. Switching of the thermal behaviour occurs due to post spinning heat treatments.
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Deacetylation-induced changes in thermal properties of Sterculia urens gum
Journal of Thermal Analysis and Calorimetry, 2015Co-Authors: Niranjan Patra, Lucy Vojtová, Lenka MartinováAbstract:A quantitative measurement of degree of deacetylation of Sterculia urens gum and its effect on the thermal properties changes is presented in this study. Sterculia urens gum was deacetylated at varying deacety- lation reaction temperature and time. The acetyl group is replaced by hydroxyl which leads to better solubility of the Sterculia gum in water. Thermal properties were charac- terized using differential scanning calorimetry and ther- mogravimetric analysis. DSC analysis reveals that after the deacetylation, the glass transition temperature appears at around 60 C of the S. urens gum. After deacetylation, the TG degradation clearly shows three different peaks. Deacetylation reaction temperature plays the major role in the thermal stability and structure of the S. urens gum.
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Structure-property relationships in Sterculia urens/polyvinyl alcohol electrospun composite nanofibres.
Carbohydrate polymers, 2014Co-Authors: Niranjan Patra, Lenka Martinová, Martin Stuchlík, Miroslav ČerníkAbstract:Sterculia urens (Gum Karaya) based polyvinyl alcohol (PVA) composite nanofibres have been successfully electrospun after chemical modification of S. urens to increase its solubility. The effect of deacetylated S. urens (DGK) on the morphology, structure, crystallization behaviour and thermal stability was studied for spuned fibres before and after spinning post treatment. An apparent increase in the PVA crystallinity were observed in the PVA-DGK composite nanofibres indicating S. urens induced crystallization of PVA. The pure PVA nanofibre and the nanofibres of PVA-DGK composites were introduced to post electrospinning heat treatment at 150°C for 15 min. The presence of Sterculia gum reduced the fibre diameter and distribution of the nanofibres due to the increased stretching of the fibres during spinning. Switching of the thermal behaviour occurs due to post spinning heat treatments.