Authors: S.H. Hwang
Affilation: Daegu Gyeonbuk Institure of Science and Technology, Korea
Pages: 437 - 440
Keywords: heat insulating material, nanofiller
In this work, we have synthesized Titanate nanotube(TiNT) and Layered Double Hydroxide(LDH) nanoparticles and studied about their applicable properties as inorganic filler due to their high porous structure. The synthetic parameters affecting the particle size and morphology have been investigated on the basis of crystal growth mechanism. In addition, we would intend to apply this technology, in more industrial point of view, to the fabrication process of vermiculite-TiNT/LDH filler composites, where nano-sized TiNT and LDHs were dispersed in exfoliated vermiculites. Well-dispersed TiNT/LDH-vermiculite composites were obtained by wet-chemical mixing method considering surface charges of two components. The thermal characteristics such as thermal conductivity and so on. were investigated by using the laser flash apparatus. The changes in thermal conductivity of heat insulating composites was compared according to the type and amount of inorganic filler. The thermal conductivities were confirmed to be reduced in proportion with the amount of inorganic nanofillers, which led to more effective heat insulating properties. Especially, the trends were observed more obviouly in TiNT with more porous structure. These results were discussed upon the basis of the morphology and surface area of nano fillers.