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Microelectrode technique in molecular assemblies

Author: XuJianXin
Tutor: GuoRong;LiuTianQing
School: Yangzhou University
Course: Physical and chemical
Keywords: Microelectrode technique Organized molecular Diffusion coefficient Lamellar liquid crystal Combination Surfactant system Microemulsion Increasing the content of Mass ratio Triton
CLC: O657.1
Type: Master's thesis
Year: 2003
Downloads: 71
Quote: 1
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Abstract


Platinum microelectrode voltammetry determination of three typical surfactants (SDS, CTAB, Triton X-100) in the diffusion coefficient of the micelles and lamellar liquid crystal microemulsion surfactant molecule diffusion coefficient. The results show that the in constant mass specific surface active agent / alcohol, with the increase of the water content in the system, the diffusion coefficient of the surfactant in the microemulsion, lamellar liquid crystals were increased; constant mass specific surface-active agent / water With the increase in the alcohol content, the diffusion coefficient of the surfactant in the microemulsion, lamellar liquid crystal are increased; at constant mass ratio of water / alcohol, along with the increase of the surfactant content, the surface active agent in the micro emulsion lamellar liquid crystal in the diffusion coefficient decreases. O / W micro-emulsion droplet diffusion coefficient than the diffusion coefficient of the W / O microemulsion droplets is about two orders of magnitude, is about four orders of magnitude than the diffusion coefficient of the lamellar liquid crystal surfactant molecules. The diffusion coefficient of CTAB molecules the> the SDS molecular diffusion coefficient> Triton X-100 molecular diffusion coefficient. The platinum microelectrode voltammetry determination of methylene blue (MB), the nC of bovine serum albumin (BSA) in the three typical surfactant systems (SDS / 5 H 11 OH / H 2 O, CTAB / nC 5 H 11 OH / H 2 O, Triton X -100/nC 10 H 21 OH / H 2 O) of Electrochemical the microemulsion and lamellar liquid crystal diffusion coefficient. The results show that the in constant mass specific surface active agent / alcohol, with the increase of the water content in the system, the diffusion coefficient of the MB in the microemulsion, lamellar liquid crystal are increased; in constant mass specific surface-active agent / water, with with alcohol content increases, the diffusion coefficient of the MB in the microemulsion, lamellar liquid crystal are increased; at constant mass ratio of water / alcohol, along with the increase of the surfactant content in the microemulsion, lamellar liquid crystal, MB diffusion coefficient decreases. MB diffusion coefficient in the CTAB lamellar liquid crystal the diffusion coefficient of Triton X-100 lamellar liquid crystal> MB> MB SDS lamellar liquid crystal in the diffusion coefficient. In constant mass specific surface active agent / alcohol, with the increase of the water content in the system, the diffusion coefficient of the BSA in the lamellar liquid crystal increases; in constant mass specific surface-active agent / water, with the increase of the alcohol content, BSA The increase in the diffusion coefficient in the lamellar liquid crystal; constant mass ratio of water / alcohol BSA lamellar liquid crystal diffusion coefficient decreases with increasing surfactant content. BSA diffusion coefficient> SDS lamellar liquid crystal diffusion coefficient of BSA in the lamellar liquid crystal TritonX-100> BSA CTAB lamellar liquid crystal diffusion coefficient. Yangzhou University master's thesis of SDs / n-CsHllOH Eight Kings 20 and HZO system of SDS Ecuador A knife in the ultrasound so micelle microemulsion droplet dispersion, ultrasound is stopped immediately after the determination of the micelle, microemulsion droplet formation process of the current the rate constants measured by voltammetry and the rate constants measured by conductivity and conductivity, is basically the same. As the water content and n-pentyl drunk content increases, the SDS the peak current increases, the micelle, microemulsion droplets return to balance the time required are reduced. With SDS content increases, the the SDS peak current is reduced, micelle, microemulsion droplet recovery increased to balance the time required.

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CLC: > Mathematical sciences and chemical > Chemistry > Analytical Chemistry > Instrument analysis ( physics and physical chemistry ) > Electrochemical analysis
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