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방승훈,김정안,권난현,김형철,Abu Bakkar Siddique,강호중,이재열,김주훈,김세훈 한국고분자학회 2014 Macromolecular Research Vol.22 No.4
Versatile and direct synthesis of water-dispersible titanium dioxide (TiO2) nanoparticles in the presenceof functionalized poly(ethylene oxide)s (PEO) having carboxylic acid groups is presented. The functionalized PEOs,such as PEO-folate conjugate and PEO-b-poly(maleic acid) (PEO-b-PMAc) as polymeric surfactants, were employedfor in situ synthesis of TiO2 nanoparticles through hydrolytic sol-gel process of titanium tetrachloride as a precursorin eco-friendly alcoholic media at a relatively low temperature. Both of the two polymers were found to be very effectivefor stabilizing TiO2 nanocrystals, exhibiting not only fairly good photocatalytic activities but also water-dispersibleproperty. The core TiO2 crystallites in the size range of 8~11 nm could be readily controlled in ethanol at a relativelylow reaction temperature (70 oC), irrespective of the incipient reaction condition, which showed mixed polymorphs. The TiO2 nanoparticles consist of a few percentages (<10%) of brookite and mostly anatase phases. This processprovides a simple and useful in situ preparative route to obtain water-dispersible TiO2 nanoparticles.
방승훈,장동일,장규섭 한국산업식품공학회 2003 산업 식품공학 Vol.7 No.1
A circular-type dryer was designed for automatizing red ginseng manufacturing and developing of a process for manufacturing the best quality red ginseng. The drying system was designed that it can measure temperature and humidity, connected with computer, and control Temperature, humidity and air flow rate as desired. The operating capacity of drying system was designed for 30 roots of green ginseng per batch. The experiment of red ginseng manufacturing was accomplished by the circular-type dryer for automatized red ginseng manufacturing developed. The average yield of Heaven and Earth Grade red ginseng manufactured was 18.9%.