Recently, development and application of the new material where an interest was based on an increasing nano-material are progressing in an industrial field extensively. In these process, correct measurement technology about nano-material must be accompanied, because nano-material specific surface ar...
Recently, development and application of the new material where an interest was based on an increasing nano-material are progressing in an industrial field extensively. In these process, correct measurement technology about nano-material must be accompanied, because nano-material specific surface area and pore size, amount, distribution, formation, etc. is contributes to properties of the surface in solid. The adsorption-desorption of a gas by solid can, in principle, be made to yield valuable information as to the surface area and pore structure of the solid. In practice the range of suitable adsorptives is quite narrow, by far the most commonly used on being nitrogen at its boiling point, 77 K. Adsorption-desorption in solid surface are affected by a kind of solid, state, a properties of gas, temperature, pressure, etc. and can make adsorption-desorption according to increase-decrease of temperature and pressure repeatedly. If maintain fixed temperature, adsorption-desorption amount is related to change of pressure. Therefore, be obtainable isotherm of nano-material, measuring adsorption amount while continuously giving pressure. And analyzes it, can know an adsorption process and surface area and analogies of nano-material properties from calculating size of pore or particle. Manufacture did the experiment system which can measure a change of gas adsorption amount with volumetric in liquid nitrogen temperature, the system is designed to be operated automatically for reliable measurement a long time and maintain identical conditions for each measurement. Subsequently, evaluated performance about this system and experimented an gas adsorption of the ACF(Activated Carbon Fiber), Aerogel, Silica-Alumina which was nano-material.
Recently, development and application of the new material where an interest was based on an increasing nano-material are progressing in an industrial field extensively. In these process, correct measurement technology about nano-material must be accompanied, because nano-material specific surface area and pore size, amount, distribution, formation, etc. is contributes to properties of the surface in solid. The adsorption-desorption of a gas by solid can, in principle, be made to yield valuable information as to the surface area and pore structure of the solid. In practice the range of suitable adsorptives is quite narrow, by far the most commonly used on being nitrogen at its boiling point, 77 K. Adsorption-desorption in solid surface are affected by a kind of solid, state, a properties of gas, temperature, pressure, etc. and can make adsorption-desorption according to increase-decrease of temperature and pressure repeatedly. If maintain fixed temperature, adsorption-desorption amount is related to change of pressure. Therefore, be obtainable isotherm of nano-material, measuring adsorption amount while continuously giving pressure. And analyzes it, can know an adsorption process and surface area and analogies of nano-material properties from calculating size of pore or particle. Manufacture did the experiment system which can measure a change of gas adsorption amount with volumetric in liquid nitrogen temperature, the system is designed to be operated automatically for reliable measurement a long time and maintain identical conditions for each measurement. Subsequently, evaluated performance about this system and experimented an gas adsorption of the ACF(Activated Carbon Fiber), Aerogel, Silica-Alumina which was nano-material.
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