카이스트 분자공학실험 Theory of analysis about molecular engineering 결과 보고서
- 최초 등록일
- 2015.10.10
- 최종 저작일
- 2013.09
- 5페이지/
한컴오피스
- 가격 2,000원
목차
1. Objectives
2. Theoretical background
3. Experimental Procedure
4. Experimental materials and tools
5. Results and discussion
1) Explain the basic term
2) Expain the dirt removing mechanism of using detergent in a washing machine
3) When pins are dropped one by one into the cup, there is no overflow. why not?
4) Explain the ring method which is invented by Du Nouy. Derive the equation.
5. Reference
본문내용
Materials having both a hydrophilic and hydrophobic group in a molecule are called surfactants. These surface -active properties appear not only in single molecules, but also block copolymers. These amphiphilic molecules are adsorbed into the interface between water and oil, water and air, oil and air, and they reduce the surface tension or interfacial tension. They can construct many types of super -molecules in water, such as spherical micelles, cylindrical micelles, and vesicles. In this experiment, we examine the representative spherical micelle in super-molecules formed by amphiphilic molecules in water. We vary the concentration of amphiphilic molecules and measure the formation of the micelle, the size of the micelle, and the size distribution of the micelle using dynamic light scattering (DLS) and measure CMC of surfactant.
<중 략>
Surface tension : It is a contractive tendency of the surface of a liquid that allows it to resist an external force. The cohesive forces amon
참고 자료
CBE201 Molecular Engineering Laboratory, KAIST, 2013
du Noüy, Pierre Lecomte (1925). "An Interfacial Tensiometer for Universal Use". The Journal of General Physiology 7 (5): 625–633. doi:10.1085/jgp.7.5.625.
Surface tension, Dr. Pallab Ghosh,Department of Chemical Engineering IIT Guwahati, Guwahati–81039 India
DU NOUY "An apparatus for measuring surface tension.", J. Gen. Physiol., 1, 521.
JOHLIN. "The ring method for surface tension measurement." Qid., 64,93
Philipus J. Patty and Barbara J. Frisken, Direct determination of the number-weighted mean radius and polydispersity from dynamic light-scattering data
