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Organic Solvents Transport Through Alkali-Treated Agro-waste Microfibre Incorporated with Low Density Polyethylene Composites
Henry Chinedu Obasi,
Simeon Nwanonenyi,
Innocent Eze,
Ihuoma Chukwujike,
Chioma Anyiam,
Felix Aguele,
Kashif Ijaz
Issue:
Volume 3, Issue 4, July 2017
Pages:
50-63
Received:
8 May 2017
Accepted:
31 May 2017
Published:
30 June 2017
Abstract: We report the transport behaviour of low density polyethylene composites containing both untreated and alkali-treated agro-waste microfibre in three aromatic organic solvents (benzene, toluene, and xylene) at 40, 60 and 80°C by the conventional weight-gain method. The effects of fibre content, alkali treatment, and filler particle size on solvent sorption were analysed. Transport parameters such as diffusion coefficient, sorption coefficient, and permeation coefficient have been calculated in terms of microfibre content, particle size, nature of the solvent, and temperature. It was observed that all the systems follow the Fickian mode of transport on increasing temperature. The van’t Hoff’s relationship was used to determine the thermodynamic parameters and was found that the estimated free energies of sorption were all positive, indicating non-spontaneity of the solubility of micro fibre/LDPE composites. The first order kinetic rate constant and swelling parameters were also evaluated.
Abstract: We report the transport behaviour of low density polyethylene composites containing both untreated and alkali-treated agro-waste microfibre in three aromatic organic solvents (benzene, toluene, and xylene) at 40, 60 and 80°C by the conventional weight-gain method. The effects of fibre content, alkali treatment, and filler particle size on solvent s...
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Effects of Coconut Husk and Corn Cob as Fillers in Flexible Polyurethane Foam
Pauline Uchechukwu Chris-Okafor,
Arinze Rose Mary Uchechukwu,
Joy Nwando Nwokoye,
Ernest Umar Ukpai
Issue:
Volume 3, Issue 4, July 2017
Pages:
64-69
Received:
1 May 2017
Accepted:
28 June 2017
Published:
25 July 2017
Abstract: The effects of local materials as fillers incorporated into the flexible polyether foam recipes were investigated. The fillers; coconut husk and corn cob of mesh sizes of 150 µm respectively were mixed in the ratio of 50:50. Varying percentages of the mixed fillers, 5%, 10%, 15%, 20% and 25% were mixed with polyether foam recipes in the appropriate formulations and physico-mechanical tests were carried out on the samples. Density and compression set showed an increasing trend with increase in the filler. Elongation at break and tensile strength showed a decrease in the value as the filler load was increasing. Hardness showed a slight random variation in the value as the filler load increased. Thermal conductivity also showed a decrease in its value as the filler load increased that means it can serve as a fire retardant. All these properties were compared to a controlled sample (sample without filler). These fillers can be used in the production of polyurethane foams since they are organic materials, thus they can enhance the biodegradability of polyurethane products and be use also as flame retardants.
Abstract: The effects of local materials as fillers incorporated into the flexible polyether foam recipes were investigated. The fillers; coconut husk and corn cob of mesh sizes of 150 µm respectively were mixed in the ratio of 50:50. Varying percentages of the mixed fillers, 5%, 10%, 15%, 20% and 25% were mixed with polyether foam recipes in the appropriate...
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Physicochemical Comparison Between Recycled and Straight Run Polypropylene Yarn
Abdalaziz M. Seddeg,
Mohammed Margany,
Omsalama A. Alhafian,
Hussain A. Hussain,
Mohammed Noraldeen,
Mohamed N. Abdalaziz
Issue:
Volume 3, Issue 4, July 2017
Pages:
70-75
Received:
7 May 2017
Accepted:
31 May 2017
Published:
25 July 2017
Abstract: In this research, investigating the possibility of producing, processing and also characterization of polypropylene fiber and recycling polypropylene has been presented. For this purpose, PP powder and inorganic filler were mixed using a twin screw extruder and modified granule was produced. After producing as-spun filament yarns by spinning machine at the take-up speed of 2000 m/min, samples were drawn, textured and finally weft knitted. Physical and structural properties of as-spun and drawn yarns with constant and variable draw ratios were investigated. The experimental results revealed that the straight run PP yarn impact tolerance is higher than the recycled PP yarn. And both type of yarns could be compared by drawing process. The straight run and recycled polypropylene filament woven laminates performed better in terms of both tensile load and broken elongation, with slight decrease in broken elongation results.
Abstract: In this research, investigating the possibility of producing, processing and also characterization of polypropylene fiber and recycling polypropylene has been presented. For this purpose, PP powder and inorganic filler were mixed using a twin screw extruder and modified granule was produced. After producing as-spun filament yarns by spinning machin...
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Analysis and Evaluation of Cassava Starch-Based Biodegradable Trays as an Alternative Packaging to Fresh Strawberry (Fragaria ananassa cv San Andreas)
Marina Baratter,
Eduarda Francine Weschenlfelder,
Fernanda Stoffel,
Mara Zeni,
Luciani Tatsch Piemolini-Barreto
Issue:
Volume 3, Issue 4, July 2017
Pages:
76-81
Received:
21 May 2017
Accepted:
26 June 2017
Published:
25 July 2017
Abstract: In this study, biodegradable cassava starch/poly (vinyl alcohol) (PVA) trays with and without poly (lactic acid) (PLA) coating were evaluated as possible substitutes for expanded poly (styrene) (EPS) trays in strawberry packaging. The parameters evaluated were physical and chemical parameters of pH, soluble solids and titratable acidity for strawberries, strawberry and trays moisture content and the mass loss of the systems. In addition, the amount of molds and yeasts was determined in both strawberries and trays. None of the trays used in this study caused changes in the physical and chemical parameters of the strawberries. The molds and yeasts growth was higher in the strawberries packed in EPS compared with the other packaging. The trays with PLA coating and the EPS trays had statistically equal mass loss. The PLA coating applied on cassava starch-based trays was efficient as moisture absorption barrier.
Abstract: In this study, biodegradable cassava starch/poly (vinyl alcohol) (PVA) trays with and without poly (lactic acid) (PLA) coating were evaluated as possible substitutes for expanded poly (styrene) (EPS) trays in strawberry packaging. The parameters evaluated were physical and chemical parameters of pH, soluble solids and titratable acidity for strawbe...
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