Structure and universal property of nonionic surfactant and phospholipid mixed micelle in the semidilute regime = Semidilute영역에서의 중성계면활성제와 인지질이 결합된 마이셀 구조와 보편적 특성

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On the mixed system of nonionic surfactant $C_{12}E_5$ (Pentaethyleneglycol mono n-dodecylether) and phospholipids molecules DMPC (DL-a-phosphatidylcholine Dimyristoyl) in the semidilute regime, we found that dilute-semidilute transition concentration $(c^*)$ decreased as increasing DMPC`s quantities. In spite of having different transition point, their viscosity and correlation length followed the scaling law $(η-η_o)~(c/c^*)^{1.91+/-0.03}$ and $(ξ/ξ^*)~ (c/c^*)^{0.585+/-0.005}$ in the viscosity measurements and DLS (Dynamic Light Scattering) experiment when scaled using solvent viscosity $(η_o)$ and concentration $(c^*)$ and correlation length $(ξ^*)$ at transition point. These are different from wormlike micellar solution with counterions in which exponent values of the viscosity and correlation length change according to salt`s quantities. These exponents in the experiments are almost same as $η ~ c^2$ and $ξ ~ c^{-0.5}$ that are results from the mean field theory applied to the branched wormlike micelle system with the sliding effect. As the result, the semidilute regime of nonionic surfactant /phospholipids mixed systems is expected to be the network structure. Though transition point is controlled by DMPC`s quantities, their properties are all influenced by the sliding and break-recombination effect.
Advisors
Kim, Mahn-Wonresearcher김만원researcher
Description
한국과학기술원 : 물리학과,
Publisher
한국과학기술원
Issue Date
2004
Identifier
237795/325007  / 020023530
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 물리학과, 2004.2, [ 37 p. ]

Keywords

micelle; 세미다일루트영역; 중성계면활성제; 보편적 특성; 인지질; semidilute regime; Nonionic Surfactant; Phospholipid; Universal Property; 마이셀

URI
http://hdl.handle.net/10203/48663
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=237795&flag=dissertation
Appears in Collection
PH-Theses_Master(석사논문)
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