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Hilonga, A.,Kim, J.K.,Sarawade, P.B.,Kim, H.T. North-Holland 2010 Journal of non-crystalline solids Vol.356 No.28
In this study we have examined the properties of sodium alumino silicate (SAS) synthesized by simultaneous addition of sodium silicate and aluminate under controlled reaction conditions. The varied conditions include the concentration of the reactants and the pH (low, neutral, and high); while the stirring speed, precipitating temperatures, and the drying conditions were kept constant. XRD, SEM, and EDS results indicate that the materials developed were amorphous and have irregularly-textured particles. They were rich in Si, Al, O, and Na; and had Na/Al molar ratios of about 0.4 to 1. The SiO<SUB>2</SUB>:Al<SUB>2</SUB>O<SUB>3</SUB> molar ratio in the final product ranges from 2.2 to 5.8 as determined by EDS. FTIR studies confirmed the formation of Si-O-Al bond. Nitrogen physisorption studies were done to examine the surface area and porosity of the final product. The SAS samples examined have bulk density greater than 2.5g/cm<SUP>3</SUP>, pore volume up to 0.85cm<SUP>3</SUP>/g, and the pore diameters between 13 to 20nm. The BET surface area ranges from 80 to 318m<SUP>2</SUP>/g, and oil absorption from 75 to 200ml/100g. The products obtained have desirable properties and are expected to be a potential low-cost alternative as functional fillers for paper and paint industries.
Synthesis of mesoporous silica with superior properties suitable for green tire
Hilonga, A.,Kim, J.K.,Sarawade, P.B.,Quang, D.V.,Shao, G.N.,Elineema, G.,Kim, H.T. Korean Society of Industrial and Engineering Chemi 2012 Journal of industrial and engineering chemistry Vol.18 No.5
In this article we report synthesis of mesoporous silica with superior properties for application in green tire (environmentally friendly tire) as filler. The synthesis was done using a newly innovated apparatus which produce mesoporous silica with superior properties. The desired superior properties are big pore size, optimum BET, large pore volume, uniform properties, and improved performance in real application as tire filler. Mesoporous silica was characterized by BET method and final product with a pore diameter of up to 37nm was obtained without using surfactants. This is unprecedented step toward synthesis of silica that is suitable for tire industry.
Synthesis of mesoporous silica with superior properties suitable for green tire
Askwar Hilonga,Jong-Kil Kim,Pradip B. Sarawade,Dang Viet Quang,Godlisten N. Shao,Gideon Elineema,김희택 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.5
In this article we report synthesis of mesoporous silica with superior properties for application in green tire (environmentally friendly tire) as filler. The synthesis was done using a newly innovated apparatus which produce mesoporous silica with superior properties. The desired superior properties are big pore size, optimum BET, large pore volume, uniform properties, and improved performance in real application as tire filler. Mesoporous silica was characterized by BET method and final product with a pore diameter of up to 37 nm was obtained without using surfactants. This is unprecedented step toward synthesis of silica that is suitable for tire industry.
Two-step rapid synthesis of mesoporous silica for green tire
Askwar Hilonga,김희택,Jong-Kil Kim,Pradip Bhikaji Sarawade,Dang Viet Quang,Godlisten Namwel Shao,Gideon Elineema 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.11
We report a two-step rapid route of synthesizing inexpensive mesoporous silica using the waste material (hexafluorosilicic acid, H2SiF6) of phosphate fertilizer industry and sodium silicate (Na2O·SiO2). The reaction was performed in a newly innovated manufacturing apparatus. This apparatus produces mesoporous silica with uniform properties through controlled mixing of source materials at predetermined equivalent ratio. The precursors are rapidly mixed within the nozzles to enable uniform control of physical properties of the final product. The obtained mesoporous silica was characterized using N2 physisorption studies, scanning electron microscope (SEM), and EDS. The final product was found to have superior properties that are suitable for green tire (environmentally friendly tire) as inorganic filler. The process reported in this study may significantly reduce the release of hazardous materials into the environment and it might confer economic benefits to the responsible industries. A project on innovative industrial application of our products for the tire industry is in progress.