The Experts below are selected from a list of 168 Experts worldwide ranked by ideXlab platform
Roxana A. Ruseckaite - One of the best experts on this subject based on the ideXlab platform.
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Bonding Quality of Chemically-Modified Soybean Protein Concentrate-Based Adhesives in Particleboards from Rice Husks
Journal of the American Oil Chemists' Society, 2012Co-Authors: Emiliano M. Ciannamea, P. M. Stefani, J. F. Martucci, Roxana A. RuseckaiteAbstract:The aim of the present study was to upgrade the bonding quality and water resistance of medium-density particleboards based on rice husks (RH) as a Wood Substitute and soybean protein concentrate (SPC) as the binder via chemical modification of SPC. Alkali (A), citric acid (CA) and boric acid (BA) were used to modify proteins and the carbohydrate complex in SPC. The effect of chemical treatment performed on SPC was followed by Fourier transform infrared, differential scanning calorimetry, thermo-gravimetric analysis and initial apparent viscosity measurements. Board properties were evaluated in terms of internal bond (IB) and physical properties. Results revealed that boards bonded with SPC treated with boric acid, exhibited the highest IB and the lowest water absorption and thickness swelling at 2 and 24 h, due to cross-linking reactions with exposed OH-groups in the amorphous region of cellulose of RH. Results demonstrate that boric acid-modified–SPC-bonded boards met the requirements of IB recommended by the US Standard ANSI A208.1-2009 for M1, MS, M2 and M3-grade medium-density particleboards but failed to pass the thickness swelling required. This issue of BSPC-RH boards is compensated for by the benefit of being formaldehyde-free which makes them suitable for indoor applications.
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medium density particleboards from modified rice husks and soybean protein concentrate based adhesives
Bioresource Technology, 2010Co-Authors: Emiliano M. Ciannamea, P. M. Stefani, Roxana A. RuseckaiteAbstract:The main goal of this work was to evaluate the technical feasibility of using rice husk (RH) as Wood Substitute in the production of environmentally sound medium-density particleboards using adhesives from soybean protein concentrate (SPC). Chemical modification of rice husk with sodium hydroxide and sodium hydroxide followed by hydrogen peroxide (bleaching) were undertaken to evaluate the effect of such treatments on the composition and topology of rice husk and the performance of produced panels. Both treatments were efficient in partially eliminating hemicelluloses, lignin and silica from RH, as evidenced by thermo-gravimetric analysis (TGA). Scanning electron microscopy observations suggested that alkaline treatment resulted in a more damaged RH substrate than bleaching. The dependence of mechanical properties (modulus of rupture, modulus of elasticity, and internal bond) and the physical properties (water absorption and thickness swelling) on chemical treatments performed on both, rice husk and SPC was studied. Bleached-rice husk particleboards bonded with alkaline-treated soybean protein concentrate displayed the best set of final properties. Particleboards with this formulation met the minimum requirements of internal bond, modulus of elasticity and modulus of rupture recommended by the US Standard ANSI/A208.1 specifications for M1, MS and M2-grade medium-density particleboards, but failed to achieve the thickness swelling value recommended for general use panels. This limitation of soybean protein concentrate-bonded rice husk particleboards was counterbalanced by the advantage of being formaldehyde-free which makes them a suitable alternative for indoor applications.
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Medium‐density particleboards from rice husks and soybean protein concentrate
Journal of Applied Polymer Science, 2007Co-Authors: P. Leiva, Emiliano M. Ciannamea, Roxana A. Ruseckaite, P. M. StefaniAbstract:Rice husks are a valuable agricultural residue produced worldwide with potential applications as a Wood Substitute in particleboard manufacturing. In this work, the feasibility of producing medium-density particleboards based on waste rice husks bonded with environmentally friendly adhesives from soybean protein concentrate was analyzed. The mechanical properties, internal bond strength, and water resistance of the obtained panels bonded with the homemade soybean protein concentrate adhesives were compared to those of boards glued with commercial adhesives such as phenol–formaldehyde and urea–formaldehyde resins. An alkaline treatment improved the gluing ability of the soybean protein concentrate. The mechanical properties of the alkali-treated soybean protein concentrate were comparable to those determined for panels with urea–formaldehyde. The lower water resistance of the alkali-treated soybean protein concentrate particleboards, compared with that of the formaldehyde-based resins, was counterbalanced by the advantage of being more environmentally sound, which makes them suitable for applications for which the requirements for water resistance are not stringent. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Hiroshi Ohi - One of the best experts on this subject based on the ideXlab platform.
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Development of integrated oil palm empty fruit bunches (EFB)-based dissolving pulp and furfural production: a consequential LCA approach
The International Journal of Life Cycle Assessment, 2020Co-Authors: Agusta Samodra Putra, Ryozo Noguchi, Tofael Ahamed, Akiko Nakagawa-izumi, Hiroshi OhiAbstract:Purpose Dissolving pulp production is mostly reliant on Wood, which drastically depletes forest resources. To prevent the over-exploitation, the efforts were required by considering waste materials utilization. Therefore, a comprehensive assessment to account for environmental impacts was needed. The purpose of this research was to determine the environmental impact of empty fruit bunches (EFB) utilization from oil palms as a promising raw material Substitute for Wood in the production of dissolving pulp and furfural as co-product. Methods The consequential life cycle assessment (cLCA) was performed by following the methodology in ISO 14040. Inventory for the input–output materials and energies for the proposed integrated dissolving pulp and furfural co-production process was evaluated based on laboratory-scale experiments. Meanwhile, the field survey as a reference for the existing practice in the conventional dissolving pulp industry was conducted. The SimaPro v8.0.5® software was used for the LCA calculation with the Centrum voor Milieuwetenschappen Leiden (CML) environmental impact assessment method. Several environmental impact categories, such as acidification, global warming, eutrophication, and human toxicity potential, were quantified. Results and discussion This study examined three proposed scenarios for dissolving pulp and furfural co-production compared with the conventional dissolving pulp production. In the Scenario 1, 50% of the Wood consumption was replaced by EFB and applied to acid prehydrolysis/soda cooking followed by ECF bleaching, with an additional process to co-produce furfural. In the Scenario 2, 100% of Wood consumption was replaced by EFB, with the same cooking and bleaching parameters as those in Scenario 1. In the Scenario 3, 100% of Wood consumption was replaced by EFB, and the acid was replaced by water in the prehydrolysis process to improve the total environmental performance with the same conditions as the previous scenarios. The Scenario 3 was the most promising scenario and had the lowest environmental impact. Conclusions This research was conducted to propose EFB, which is environmentally sustainable and economically profitable, as a Wood Substitute in the co-production of dissolving pulp and furfural. The scenarios were proposed and compared with the existing practices. Based on the cLCA approach, this study recommended the EFB as a promising raw material and referred to Scenario 3 for the environmentally friendly system production.
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Development of integrated oil palm empty fruit bunches (EFB)-based dissolving pulp and furfural production: a consequential LCA approach
International Journal of Life Cycle Assessment, 2020Co-Authors: Agusta Samodra Putra, Ryozo Noguchi, Tofael Ahamed, Akiko Nakagawa-izumi, Hiroshi OhiAbstract:Dissolving pulp production is mostly reliant on Wood, which drastically depletes forest resources. To prevent the over-exploitation, the efforts were required by considering waste materials utilization. Therefore, a comprehensive assessment to account for environmental impacts was needed. The purpose of this research was to determine the environmental impact of empty fruit bunches (EFB) utilization from oil palms as a promising raw material Substitute for Wood in the production of dissolving pulp and furfural as co-product. The consequential life cycle assessment (cLCA) was performed by following the methodology in ISO 14040. Inventory for the input–output materials and energies for the proposed integrated dissolving pulp and furfural co-production process was evaluated based on laboratory-scale experiments. Meanwhile, the field survey as a reference for the existing practice in the conventional dissolving pulp industry was conducted. The SimaPro v8.0.5® software was used for the LCA calculation with the Centrum voor Milieuwetenschappen Leiden (CML) environmental impact assessment method. Several environmental impact categories, such as acidification, global warming, eutrophication, and human toxicity potential, were quantified. This study examined three proposed scenarios for dissolving pulp and furfural co-production compared with the conventional dissolving pulp production. In the Scenario 1, 50% of the Wood consumption was replaced by EFB and applied to acid prehydrolysis/soda cooking followed by ECF bleaching, with an additional process to co-produce furfural. In the Scenario 2, 100% of Wood consumption was replaced by EFB, with the same cooking and bleaching parameters as those in Scenario 1. In the Scenario 3, 100% of Wood consumption was replaced by EFB, and the acid was replaced by water in the prehydrolysis process to improve the total environmental performance with the same conditions as the previous scenarios. The Scenario 3 was the most promising scenario and had the lowest environmental impact. This research was conducted to propose EFB, which is environmentally sustainable and economically profitable, as a Wood Substitute in the co-production of dissolving pulp and furfural. The scenarios were proposed and compared with the existing practices. Based on the cLCA approach, this study recommended the EFB as a promising raw material and referred to Scenario 3 for the environmentally friendly system production.
P Asokan - One of the best experts on this subject based on the ideXlab platform.
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plant fiber industrial waste reinforced polymer composites as a potential Wood Substitute material
Journal of Composite Materials, 2008Co-Authors: Mohini Saxena, R K Morchhale, P Asokan, B K PrasadAbstract:This investigation deals with the property characterization and utilization of abundantly available and renewable resources of plant fibers such as jute and sisal. These plant fibers along with industrial wastes (fly ash and red mud) have been used for synthesizing value added composite materials. Relevant engineering properties such as physical and mechanical, resistance to abrasive wear, weathering and fire, etc., of the plant fiber reinforced polymer matrix composites so synthesized were characterized. The characteristics of conventional Wood and other commercially available potential candidate building materials were also compared to assess the application potential of the newly developed materials vis-a-vis their conventional counterparts. The study reveals that the developed polymer—natural fiber—industrial (inorganic) waste composites attain far superior mechanical properties and resistance to abrasive wear, fire, water absorption, weathering, and chemical attack, as compared to their conventional ...
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Plant Fiber — Industrial Waste Reinforced Polymer Composites as a Potential Wood Substitute Material
Journal of Composite Materials, 2008Co-Authors: Mohini Saxena, R K Morchhale, P Asokan, B K PrasadAbstract:This investigation deals with the property characterization and utilization of abundantly available and renewable resources of plant fibers such as jute and sisal. These plant fibers along with industrial wastes (fly ash and red mud) have been used for synthesizing value added composite materials. Relevant engineering properties such as physical and mechanical, resistance to abrasive wear, weathering and fire, etc., of the plant fiber reinforced polymer matrix composites so synthesized were characterized. The characteristics of conventional Wood and other commercially available potential candidate building materials were also compared to assess the application potential of the newly developed materials vis-a-vis their conventional counterparts. The study reveals that the developed polymer—natural fiber—industrial (inorganic) waste composites attain far superior mechanical properties and resistance to abrasive wear, fire, water absorption, weathering, and chemical attack, as compared to their conventional ...
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Coal combustion residues—environmental implications and recycling potentials
Resources Conservation and Recycling, 2005Co-Authors: P Asokan, Mohini Saxena, Shyam R. AsolekarAbstract:Abstract To meet the electric power requirement, the world population is greatly dependent on fossil fuel. Presently in India, about 75% of the total electrical energy (i.e. ∼100,000 MW) is generated from fossil fuel and about 105 million tons of coal combustion residues (CCRs) as solid waste/by-product is being released annually during combustion of pulverised bituminous, sub bituminous, and lignite coal. Indian coal typically has ash content of 30–60%, which results in low calorific value however low in sulphur, radioactive elements and heavy metals content. Mostly, the CCRs is being disposed to the ash pond as thin slurry, and more than 65,000 acres of land is occupied in India for storage of this huge quantity of ash which leads ecological and environmental problems. Presently about 27% of the total CCRs produced in India is being recycled and used in various applications. The major utilisation is in cement, concrete, bricks, Wood Substitute products, soil stabilisation, road base/embankment, and consolidation of ground, land reclamation and for agriculture. In this paper, an attempt has been made to assess the global generation of CCRs, present utilisation and acceptability in Indian context, implications and future potentials to achieve environmental sound management.
Mohini Saxena - One of the best experts on this subject based on the ideXlab platform.
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Plant Fiber — Industrial Waste Reinforced Polymer Composites as a Potential Wood Substitute Material
Journal of Composite Materials, 2008Co-Authors: Mohini Saxena, R K Morchhale, P Asokan, B K PrasadAbstract:This investigation deals with the property characterization and utilization of abundantly available and renewable resources of plant fibers such as jute and sisal. These plant fibers along with industrial wastes (fly ash and red mud) have been used for synthesizing value added composite materials. Relevant engineering properties such as physical and mechanical, resistance to abrasive wear, weathering and fire, etc., of the plant fiber reinforced polymer matrix composites so synthesized were characterized. The characteristics of conventional Wood and other commercially available potential candidate building materials were also compared to assess the application potential of the newly developed materials vis-a-vis their conventional counterparts. The study reveals that the developed polymer—natural fiber—industrial (inorganic) waste composites attain far superior mechanical properties and resistance to abrasive wear, fire, water absorption, weathering, and chemical attack, as compared to their conventional ...
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plant fiber industrial waste reinforced polymer composites as a potential Wood Substitute material
Journal of Composite Materials, 2008Co-Authors: Mohini Saxena, R K Morchhale, P Asokan, B K PrasadAbstract:This investigation deals with the property characterization and utilization of abundantly available and renewable resources of plant fibers such as jute and sisal. These plant fibers along with industrial wastes (fly ash and red mud) have been used for synthesizing value added composite materials. Relevant engineering properties such as physical and mechanical, resistance to abrasive wear, weathering and fire, etc., of the plant fiber reinforced polymer matrix composites so synthesized were characterized. The characteristics of conventional Wood and other commercially available potential candidate building materials were also compared to assess the application potential of the newly developed materials vis-a-vis their conventional counterparts. The study reveals that the developed polymer—natural fiber—industrial (inorganic) waste composites attain far superior mechanical properties and resistance to abrasive wear, fire, water absorption, weathering, and chemical attack, as compared to their conventional ...
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Coal combustion residues—environmental implications and recycling potentials
Resources Conservation and Recycling, 2005Co-Authors: P Asokan, Mohini Saxena, Shyam R. AsolekarAbstract:Abstract To meet the electric power requirement, the world population is greatly dependent on fossil fuel. Presently in India, about 75% of the total electrical energy (i.e. ∼100,000 MW) is generated from fossil fuel and about 105 million tons of coal combustion residues (CCRs) as solid waste/by-product is being released annually during combustion of pulverised bituminous, sub bituminous, and lignite coal. Indian coal typically has ash content of 30–60%, which results in low calorific value however low in sulphur, radioactive elements and heavy metals content. Mostly, the CCRs is being disposed to the ash pond as thin slurry, and more than 65,000 acres of land is occupied in India for storage of this huge quantity of ash which leads ecological and environmental problems. Presently about 27% of the total CCRs produced in India is being recycled and used in various applications. The major utilisation is in cement, concrete, bricks, Wood Substitute products, soil stabilisation, road base/embankment, and consolidation of ground, land reclamation and for agriculture. In this paper, an attempt has been made to assess the global generation of CCRs, present utilisation and acceptability in Indian context, implications and future potentials to achieve environmental sound management.
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Coal ash utilization in building andagricultural applications
1999Co-Authors: Mohini Saxena, Parthasarathi AsokanAbstract:The increasing cause of disposal of coal ash in terms of environmental pollution stresses the urgent need to find its potential uses. In order to use coal ash fruitfully, various experiments have been carried out at RRL, Bhopal in making concrete block, brick, door shutters, etc. But these hardly consume about 5% of the total quantum of ash produced annually in India.Therefore, attempts have been made to utilise the coal ash in bulk quantity for conditioning wasteland, to increase its fertility Coal ash is basically an amorphous ferro-alumino silicate, which is also characteristically high in Ca'+ Mg++ Na' and K+. The impact of coal ash in agriculture and in building application depends on various physico-chemical properties for which multi -disciplinary experiments have been conducted at lab scale in RRL, Bhopal and optimized the process details for pilot scale demonstration. This paper deals with the use of coal ash in agriculture and the process of making construction materials and its properties. Crops, vegetables and cereals had grown and were found that the crop yield increased by coal ash application and there was no toxicity. Coal ashes have been used as filler and natural fibre jute as reinforcement in making polymer composite,which can be used as Wood Substitute materials. Coal ash addition increased the dimensional stability; hardness, durability, and wear resistance.
Emiliano M. Ciannamea - One of the best experts on this subject based on the ideXlab platform.
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Bonding Quality of Chemically-Modified Soybean Protein Concentrate-Based Adhesives in Particleboards from Rice Husks
Journal of the American Oil Chemists' Society, 2012Co-Authors: Emiliano M. Ciannamea, P. M. Stefani, J. F. Martucci, Roxana A. RuseckaiteAbstract:The aim of the present study was to upgrade the bonding quality and water resistance of medium-density particleboards based on rice husks (RH) as a Wood Substitute and soybean protein concentrate (SPC) as the binder via chemical modification of SPC. Alkali (A), citric acid (CA) and boric acid (BA) were used to modify proteins and the carbohydrate complex in SPC. The effect of chemical treatment performed on SPC was followed by Fourier transform infrared, differential scanning calorimetry, thermo-gravimetric analysis and initial apparent viscosity measurements. Board properties were evaluated in terms of internal bond (IB) and physical properties. Results revealed that boards bonded with SPC treated with boric acid, exhibited the highest IB and the lowest water absorption and thickness swelling at 2 and 24 h, due to cross-linking reactions with exposed OH-groups in the amorphous region of cellulose of RH. Results demonstrate that boric acid-modified–SPC-bonded boards met the requirements of IB recommended by the US Standard ANSI A208.1-2009 for M1, MS, M2 and M3-grade medium-density particleboards but failed to pass the thickness swelling required. This issue of BSPC-RH boards is compensated for by the benefit of being formaldehyde-free which makes them suitable for indoor applications.
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medium density particleboards from modified rice husks and soybean protein concentrate based adhesives
Bioresource Technology, 2010Co-Authors: Emiliano M. Ciannamea, P. M. Stefani, Roxana A. RuseckaiteAbstract:The main goal of this work was to evaluate the technical feasibility of using rice husk (RH) as Wood Substitute in the production of environmentally sound medium-density particleboards using adhesives from soybean protein concentrate (SPC). Chemical modification of rice husk with sodium hydroxide and sodium hydroxide followed by hydrogen peroxide (bleaching) were undertaken to evaluate the effect of such treatments on the composition and topology of rice husk and the performance of produced panels. Both treatments were efficient in partially eliminating hemicelluloses, lignin and silica from RH, as evidenced by thermo-gravimetric analysis (TGA). Scanning electron microscopy observations suggested that alkaline treatment resulted in a more damaged RH substrate than bleaching. The dependence of mechanical properties (modulus of rupture, modulus of elasticity, and internal bond) and the physical properties (water absorption and thickness swelling) on chemical treatments performed on both, rice husk and SPC was studied. Bleached-rice husk particleboards bonded with alkaline-treated soybean protein concentrate displayed the best set of final properties. Particleboards with this formulation met the minimum requirements of internal bond, modulus of elasticity and modulus of rupture recommended by the US Standard ANSI/A208.1 specifications for M1, MS and M2-grade medium-density particleboards, but failed to achieve the thickness swelling value recommended for general use panels. This limitation of soybean protein concentrate-bonded rice husk particleboards was counterbalanced by the advantage of being formaldehyde-free which makes them a suitable alternative for indoor applications.
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Medium‐density particleboards from rice husks and soybean protein concentrate
Journal of Applied Polymer Science, 2007Co-Authors: P. Leiva, Emiliano M. Ciannamea, Roxana A. Ruseckaite, P. M. StefaniAbstract:Rice husks are a valuable agricultural residue produced worldwide with potential applications as a Wood Substitute in particleboard manufacturing. In this work, the feasibility of producing medium-density particleboards based on waste rice husks bonded with environmentally friendly adhesives from soybean protein concentrate was analyzed. The mechanical properties, internal bond strength, and water resistance of the obtained panels bonded with the homemade soybean protein concentrate adhesives were compared to those of boards glued with commercial adhesives such as phenol–formaldehyde and urea–formaldehyde resins. An alkaline treatment improved the gluing ability of the soybean protein concentrate. The mechanical properties of the alkali-treated soybean protein concentrate were comparable to those determined for panels with urea–formaldehyde. The lower water resistance of the alkali-treated soybean protein concentrate particleboards, compared with that of the formaldehyde-based resins, was counterbalanced by the advantage of being more environmentally sound, which makes them suitable for applications for which the requirements for water resistance are not stringent. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
