Preparation of Nano-Magnetic Particles in Inverse Microemulsions

• Main Authors: Seng-Feng Wu, 吳昇峰
• Other Authors: Chao-Kuang Chen
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/01270174757069639866

碩士 === 國立成功大學 === 機械工程學系碩博士班 === 92 === In this dissertation, i has used inverse microemulsions technique to synthesize nano-magnetic particles . This method made nanometer sized cages formed by dissolving surfactant molecules in an apolar organic solvent. The chemical reactions were carried out inside the cages to synthesize nanoparticles. Because the growth of the naoparticles are limited in the cages, the particles were nanometer sized particles. The preparation of cabalt nanoparticles by the reduction of Cobalt(II) chloride hexahydrate with Sodium borohydride in the reverse microemulsion solutions of water/ Didodecyldimethylammonium bromie/ toluene was investigated. i changed the Cobalt(II) chloride hexahydrate concentration in the Didodecyldimethylammonium bromie/ toluene system to analysis the particle size. i also changed the reactive speed to study the effect of nanoparticle growth. The size, structure, and composition distribution of the resultant nanoparticles were caharacterized by employing TEM,DLS, XRD, SAED, TGA, and EDS. TEM photographs showed that the obtained cobalt nanoparticles were about 2.8~3.6nm. XRD, SAED, TGA, and EDS pattern that cobalt nanoparticles were exited.