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Fabrication of aerogel blankets using Chopped-fiber
송봉관,홍창국 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
Silica aerogel is nanostructured-material with high surface area, high porosity, and ultralow thermal conductivity. It caused by nanoporous structure, so it has a number of applications such as thermal insulator, acoustic absorbent. However, the silica aerogel have poor mechanical properties owing to its nanoporous structure. One of the good methods to strengthen aerogel is the composition of aerogel and fiber matrix. In general, silica aerogel blankets have been synthesized by ambient drying technique using non-chopped fiber as the reinforced material. But this preparation method is vulnerable to poor dispersion of silica aerogel into the blanket. To improve the degree of dispersion of silica aerogel, chopped-fiber was employed to prepare well-dispersed silica aerogel blankets. To evaluate degree of dispersion of aerogel in the blanket, thermal conductivity and dispersity was investigated by scanning electron microscope images.
Fabrication of chopped fiber-reinforced aerogel blankets
송봉관,홍창국 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
Silica aerogel is a nanostructured-material with high surface area, high porosity, and ultralow thermal conductivity. However, the silica aerogels generally have poor mechanical stability owing to its nanoporous structure and high porosity. One of the good methods to strengthen aerogels is the compositon of aerogel and fiber matrix. In general, silica aerogel blankets have been synthesized by ambient drying technique using non-chopped fiber as the reinforced material. But this preparation method is vulnerable to poor dispersion of silica aerogel into the blanket. To improve the degree of dispersion of silica aerogel, chopped-fiber was employed to prepare well-dispersed silica aerogel blankets. To evaluate degree of dispersion of aerogel, thermal conductivity and stability of aerogel blanket was investigated by scanning electron microscope images, hot wire method and TGA.
2P-270 Fabrication of well-dispersed aerogel blanket by ambient drying method
송봉관,홍창국 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Silica aerogel is a nanostructured-porous materials with high surface area, high porosity. Due to this properties, it has a number of applications such as thermal insulator, acoustic absorbent, catalytic supports. However, silica aerogel generally have poor mechanical property and stability owing to its structure. Fiber-reinforced aerogel blanket is one of the most famous method to make aerogel composites. But this preparation method has poor dispersion of aerogel in the blanket. To improve the dispersity of aerogel in blanket, non-woven fiber and surface modified silica aerogel was dispersed in solution. Dispersity of aerogel in blanket, scanning electron microscope images was employed.
The advantage of VARTM process to fabricate hydrophobic silica aerogel blanket
송봉관,홍창국 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
In general, Silica aerogel blankets were synthesized by using ambient drying method. But this method was vulnerable to poor impregnation of silica aerogel in the blaket. To improve the degree of impregnation of silica aerogel, vacuum assisted resin transfer molding(VARTM) process was employed to prepare well-impregnated blankets. Vacuum Assisted Resin Transfer Molding(VARTM) is a process where resin is driven by a vacuum to fill the mold. To study the effects on VARTM process, the silica aerogel blankets were fabricated by each solvent of n-hexane and toluene through the VARTM process and ambient drying method. The prepared samples were characterized by scanning electron miceroscope.
송봉관,홍창국 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Silica aerogel/unsaturated polyester composites were fabricated by room temperature forming of silica aerogel powders and unsaturated polyester resin. Due to the porous structure, silica aerogel showed extremely low thermal conductivity. But owing to the attraction of aerogel and polymer resin, aerogel pores isn’t preserved. Polymer resin tend to decrease of mobility at low temperature conditions. A new process was designed to preserve pores between hydrophobic silica aerogels and unsaturated polyester composites using room temperature forming. Well-preserved aerogel pores were observed in the silica aerogel/unsaturated polyester composites using scanning electron microscope and Heat insulation property was indicated thermal conductivity.And it was measured by the plating method.
송봉관,홍창국 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Silica aerogel/unsaturated polyester composites were fabricated by decompression forming of silica aerogel powders and unsaturated polyester resin. Due to the porous structure, silica aerogel showed extremely low thermal conductivity. But owing to the infiltration of unsaturated polyester resin into aerogel pores, aerogel pores isn’t preserved.A new process was designed to dilate aerogel pores between silica aerogels and unsaturated polyester resin using decompression forming. Well-preserved aerogel pores were observed in the silica aerogel/unsaturated polyester composites using scanning electron microscope and Heat insulation property was indicated thermal conductivity.And it was measured by the plating method.
송봉관,홍창국 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Silica aerogel is a porous-structured material with low thermal conductivity. Due to this thermal property, silica aerogel has attracted attention for their wide range of applications such as thermal insulator, wave adsorption. However, from the point of view of applications, aerogel has poor mechanical property and it makes they cannot be easily handled. Therefore, fiber-reinforced aerogel blanket has been prepared as an alternative to improve mechanical property. In this study, ceramic fiber reinforced silica aerogel blankets for insulation were prepared under ambient drying using sodium silicate as a source of silica and TMCS as a surface modification agent. The ceramic fiber as a supporting skeleton. To increase thermal insulation property of silica aerogel blanket, its surface treated with acid to enhance compatibility between fiber and aerogel. The silica aerogel blanket is characterized by scanning electron microscope, Fourier transform infrared spectroscopy.