Investment in stock market is one of the most popular type of investment. There are many conventi... more Investment in stock market is one of the most popular type of investment. There are many conventional techniques being used and these include technical and fundamental analysis. The main aim of every investor is to earn maximum possible return on ...
The oil sorption capacity of nettle fibrous assembly and needle-punched nonwoven structures of 10... more The oil sorption capacity of nettle fibrous assembly and needle-punched nonwoven structures of 100% nettle and nettle/kapok blends 50/50 and 75/25 were investigated. The porosity of nettle fibrous assembly was varied from 91 to 99% and a maximum oil sorption capacity was 56 g/g and 23.90 g/g for high-density oil and diesel oil, respectively. Porosity of fibrous assembly significantly influenced the oil sorption capacity. It has been observed that an increase in the proportion of kapok fibers in the nettle/kapok blended nonwoven structure increased the oil sorption capacity and reduced water sorption than that of 100% nettle nonwoven. This is because of the inherent hydrophobic property of kapok. However, 100% kapok could not be made into needle-punched nonwoven and hence it has been blended with nettle; 50/50 nettle/kapok blended structure showed maximum oil sorption capacity of 28.5 g/g and 22.5 g/g for high-density oil and diesel oil, respectively, which is higher oil sorption cap...
In this work an attempt has been made to produce kapok/polypropylene (80/20) needle punched nonwo... more In this work an attempt has been made to produce kapok/polypropylene (80/20) needle punched nonwoven for oil spill clean-up process. The difficulties involved in structuring kapok fiber through needle punching process and hence to develop a nonwoven are discussed. As an outcome, hydrophobic-oleophilic kapok fiber nonwoven has been produced and characterized for its oil sorption and retention. The maximum oil sorption was found to be 40.80 g/g and 29.0 g/g for high density oil (HD) and diesel oil respectively which is higher than the commercial polypropylene based oil sorbent pad. An interesting observation found was its retention value ranging from 0.88 to 1.00 which makes it an alternative for synthetic sorbents. The burning test of the oil sorbed samples ended up with only less amount of ash residue confirming its suitability and ecofriendly nature. 摘要 本研究旨在生产用于清理过程的木棉/聚丙烯(80/20 %)针刺非织造布。 讨论了通过针刺工艺制造木棉纤维的困难，并讨论了非织造布的开发。 作为一个结果，木棉纤维非织造布具有疏水亲油产生和特点的油吸附和 滞留。高密度油(HD)和柴油的最大吸油率分别为40.80克和29克，高于 商业聚丙烯基吸油垫。一个有趣的观察发现，它的保留值范围从0.88到 1，这使得它成为合成吸附剂的替代品。油吸附样品的燃烧试验只剩下少 量的灰渣，证实了它的适宜性和生态友好性。
This work reports on a series of thermally-bonded, hybrid and oil-sorbent nonwovens developed fro... more This work reports on a series of thermally-bonded, hybrid and oil-sorbent nonwovens developed from binary and tertiary mixing of cotton, kapok, and three varieties of milkweed fibers (Asclepias Syriaca, Calotropis Procera and Calotropis Gigantea) and polypropylene fibers. The physical and chemical properties of the fibers were investigated to examine their oleophilic character. It was observed that all the fiber surfaces were covered with natural wax. Further, kapok and milkweed fibers were found to have less cell wall thickness and high void ratio. Oil sorption and retention characteristics of these fibers were studied in loose fibrous form as well as in structured assembly form (thermally-bonded nonwovens) using high density oil and diesel oil. The effects of fiber diameter, fiber cross-sectional shape, fiber surface area and porosity on the oil sorption behavior were discussed. An excellent and a selective oil sorption behavior of milkweed fibers (Calotropis Procera and Calotropi...
This article reports on oil sorption behavior of fiber assemblies made up of single natural and s... more This article reports on oil sorption behavior of fiber assemblies made up of single natural and synthetic fibers as well as blend of natural and synthetic fibers when tested with high density oil and diesel oil. A series of filled fiber assemblies were prepared from 100% polypropylene, kapok, and milkweed fibers and another series of bonded structured fiber assemblies were prepared from a 70/30 blend of kapok and polypropylene fibers and a 70/30 blend of milkweed and polypropylene fibers. It was observed that the porosity of the fiber assemblies played a very important role in determining its oil sorption capacity. The polypropylene fiber assembly exhibited the highest sorption capacity (g/g) followed by the kapok and milkweed fiber assemblies at porosity <0.98. At higher porosities (above 0.98), polypropylene filled fiber assembly has poor sorption capacity due to large sized inter fiber pore. The kapok and milkweed fibers have intra fiber porosities of 0.81 and 0.83, respectively. All the fiber assemblies showed higher oil sorption capacity with the high density oil as compared to the diesel oil. As the kapok and milkweed fiber have low cellulose content, hence their slow degradation is an advantage in fresh and marine water applications. The good sorption capacity of kapok and milkweed fiber assemblies along with their bio-degradable nature offer great scope for structuring them into fiber assemblies with large porosity and uniform pores to have efficient oil sorbents.
Investment in stock market is one of the most popular type of investment. There are many conventi... more Investment in stock market is one of the most popular type of investment. There are many conventional techniques being used and these include technical and fundamental analysis. The main aim of every investor is to earn maximum possible return on ...
The oil sorption capacity of nettle fibrous assembly and needle-punched nonwoven structures of 10... more The oil sorption capacity of nettle fibrous assembly and needle-punched nonwoven structures of 100% nettle and nettle/kapok blends 50/50 and 75/25 were investigated. The porosity of nettle fibrous assembly was varied from 91 to 99% and a maximum oil sorption capacity was 56 g/g and 23.90 g/g for high-density oil and diesel oil, respectively. Porosity of fibrous assembly significantly influenced the oil sorption capacity. It has been observed that an increase in the proportion of kapok fibers in the nettle/kapok blended nonwoven structure increased the oil sorption capacity and reduced water sorption than that of 100% nettle nonwoven. This is because of the inherent hydrophobic property of kapok. However, 100% kapok could not be made into needle-punched nonwoven and hence it has been blended with nettle; 50/50 nettle/kapok blended structure showed maximum oil sorption capacity of 28.5 g/g and 22.5 g/g for high-density oil and diesel oil, respectively, which is higher oil sorption cap...
In this work an attempt has been made to produce kapok/polypropylene (80/20) needle punched nonwo... more In this work an attempt has been made to produce kapok/polypropylene (80/20) needle punched nonwoven for oil spill clean-up process. The difficulties involved in structuring kapok fiber through needle punching process and hence to develop a nonwoven are discussed. As an outcome, hydrophobic-oleophilic kapok fiber nonwoven has been produced and characterized for its oil sorption and retention. The maximum oil sorption was found to be 40.80 g/g and 29.0 g/g for high density oil (HD) and diesel oil respectively which is higher than the commercial polypropylene based oil sorbent pad. An interesting observation found was its retention value ranging from 0.88 to 1.00 which makes it an alternative for synthetic sorbents. The burning test of the oil sorbed samples ended up with only less amount of ash residue confirming its suitability and ecofriendly nature. 摘要 本研究旨在生产用于清理过程的木棉/聚丙烯(80/20 %)针刺非织造布。 讨论了通过针刺工艺制造木棉纤维的困难，并讨论了非织造布的开发。 作为一个结果，木棉纤维非织造布具有疏水亲油产生和特点的油吸附和 滞留。高密度油(HD)和柴油的最大吸油率分别为40.80克和29克，高于 商业聚丙烯基吸油垫。一个有趣的观察发现，它的保留值范围从0.88到 1，这使得它成为合成吸附剂的替代品。油吸附样品的燃烧试验只剩下少 量的灰渣，证实了它的适宜性和生态友好性。
This work reports on a series of thermally-bonded, hybrid and oil-sorbent nonwovens developed fro... more This work reports on a series of thermally-bonded, hybrid and oil-sorbent nonwovens developed from binary and tertiary mixing of cotton, kapok, and three varieties of milkweed fibers (Asclepias Syriaca, Calotropis Procera and Calotropis Gigantea) and polypropylene fibers. The physical and chemical properties of the fibers were investigated to examine their oleophilic character. It was observed that all the fiber surfaces were covered with natural wax. Further, kapok and milkweed fibers were found to have less cell wall thickness and high void ratio. Oil sorption and retention characteristics of these fibers were studied in loose fibrous form as well as in structured assembly form (thermally-bonded nonwovens) using high density oil and diesel oil. The effects of fiber diameter, fiber cross-sectional shape, fiber surface area and porosity on the oil sorption behavior were discussed. An excellent and a selective oil sorption behavior of milkweed fibers (Calotropis Procera and Calotropi...
This article reports on oil sorption behavior of fiber assemblies made up of single natural and s... more This article reports on oil sorption behavior of fiber assemblies made up of single natural and synthetic fibers as well as blend of natural and synthetic fibers when tested with high density oil and diesel oil. A series of filled fiber assemblies were prepared from 100% polypropylene, kapok, and milkweed fibers and another series of bonded structured fiber assemblies were prepared from a 70/30 blend of kapok and polypropylene fibers and a 70/30 blend of milkweed and polypropylene fibers. It was observed that the porosity of the fiber assemblies played a very important role in determining its oil sorption capacity. The polypropylene fiber assembly exhibited the highest sorption capacity (g/g) followed by the kapok and milkweed fiber assemblies at porosity <0.98. At higher porosities (above 0.98), polypropylene filled fiber assembly has poor sorption capacity due to large sized inter fiber pore. The kapok and milkweed fibers have intra fiber porosities of 0.81 and 0.83, respectively. All the fiber assemblies showed higher oil sorption capacity with the high density oil as compared to the diesel oil. As the kapok and milkweed fiber have low cellulose content, hence their slow degradation is an advantage in fresh and marine water applications. The good sorption capacity of kapok and milkweed fiber assemblies along with their bio-degradable nature offer great scope for structuring them into fiber assemblies with large porosity and uniform pores to have efficient oil sorbents.
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