| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.578 |
| 발표분야 | 고분자 가공/블렌드 |
| 제목 | Preparation of poly(vinyl alcohol) nanoparticles by homogenization |
| 초록 | Most nanoparticles produced by homogenization are characterized by an average particle diameter below 500 ㎚ and low microparticle content. Lower pressure homogenization may not be able to reach the energy threshold necessary to break these clusters apart. high-pressure homogenization is also expected to increase the surface activity of the emulsifying molecules, it may improve the efficiency of the product.1-3 At first, to prepare high molecular weight (HMW) atactic (a-) poly(vinyl alcohol) (PVA) used in this study, vinyl acetate was suspension polymerized using 2,2’-azobis (2,4-dimethylvaleronitrile). W/O emulsion system using high pressure homogenizer was used to prepare HMW a-PVA nanoparticles. A-PVA nanoparticles in the size range of 0.15-20 ㎛ were prepared by the emulsification at different homogenizer speeds, PVA concentrations, and volume ratios of two phases. As the agitation speed increased, the droplet size distribution shifts to smaller diameters since the turbulent kinetic energy associated with the drop breakage process increased. It is concluded that the droplet sizes shifted to smaller values with increasing agitation speeds and with increasing PVA concentration. References 1. J. Floury, A. Desrumaux, and Lardieres, Inn Food Sci & Emerg Tech, 1, 127-134 (2000). 2. A. Wiacek, and E. Chibowski, Colloid Surface A, 159, 253-261 (1999). 3. w. S. Lyoo, J. Blackwell, and H. D. Ghim, Macromolecules, 31, 4253 (1998). |
| 저자 | 조수혁, 노석균, 류원석 |
| 소속 | 영남대 |
| 키워드 | poly(vinyl alcohol); nanopartilcle; homogenization |
