Preparation of inorganic molecularly imprinted polymers based on Sulfamethazine by sol–gel process

• Main Authors: Chun-li Peng, 彭均莉
• Other Authors: Hui Chen
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/46277860714743083156

碩士 === 國立中央大學 === 化學工程與材料工程研究所 === 96 === Inorganic molecularly imprinted polymer (IMIP) based on tetramethoxysilane (TMOS) and methyltrimethoxysilane (MTMOS) by sol-gel process has been developed. The conditions of preparation, the ratio of water to monomers (R), pH value of competition solution, calcination temperature, the ratio of TMOS to monomers (TMOS ratio), amount of hydrochloric acid and the reaction temperature were investigated. The competition experiment of the IMIP for template (sulfamethazine, SMZ) and analogue(sulfamethoxazole, SMO) were analyzed by High-Performance Liquid Chromatography (HPLC). The results showed that the higher selectivity of IMIP was obtained when pH value of competition solution was set to the pKa2 of SMZ. In addition, the adsorption of SMZ was increased with increase of the R value and the 2nd step calcination temperature. The crosslink and flexible of network were affected by TMOS ratio. Finally, amount of hydrochloric acid and the reaction temperature were also adjusted appropriately. The results showed that the best selectivity (α=21.8) of IMIP were obtained with R=10, the pH value of competition solution = 7.4, TMOS ratio = 1, amount of hydrochloric acid was 750 μl, the reaction temperature = 80℃ and the 2nd step calcination temperature =375°C. The IMIP (AdSMZ=2.18 μmol/g, α=21.8) was obtained the more efficiency than non-imprinted polymer (AdSMZ=1.62 μmol/g, α=6.23).