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Synthesis, Properties and Application Study of Fluorocarbon Surfactants

Author: HanZuoZuo
Tutor: ZhangYongMing
School: Shanghai Jiaotong University
Course: Materials Science
Keywords: Fluorocarbon surfactant Synthesis Surface tension Performance Application
CLC: TQ423
Type: Master's thesis
Year: 2009
Downloads: 562
Quote: 1
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Abstract


Fluorocarbon surfactant is very important varieties of specialty surfactants, \The unique properties. Widely used in synthetic detergents, cosmetics, food, rubber, plastics, photographic materials, ink and many other industries. The fluorocarbon surfactant can be used in hydrocarbon surfactants incapable occasions, thus opening up the field of application of the surfactant. Synthesized a series of new fluorocarbon surfactant system and its surface tension, critical micelle concentration of the surfactant molecules in the adsorbed state of the gas / liquid interface and the possible arrangement, thermal stability, decontamination capability and preliminary investigation of modified polyurethane coatings. Four hexafluoro propylene oxide gathered material type fluorocarbon surfactant synthesized by the esterification reaction: CF 3 CF 2 CF 2 OCF (CF 3 ) CF 2 OCF (CF 3 ) COOCnH 2n 1 , n = 8, 12 , 16, 18, and UV, IR, NMR identification of the structure of the product. Four fluorocarbon surfactant hydrophilic-lipophilic balance (HLB value) is measured and calculated with the number of turbidity method. Determination of the surfactant itself and in the common organic solvents, the surface tension with a platinum plate method. The results show that such surfactants having excellent surface properties and can reduce the surface tension of the part of the organic solvent to the original 40% to 80%. Determination of the four surfactants in cyclohexane in the critical micelle concentration (cmc), and obtained by calculating the effective cross-sectional area of ??the saturation adsorption amount of molecules and molecular Further discussion of the fluorocarbon surfactant in an organic solvent arrangement. TG curve that this series is the fluorocarbon surfactant has good thermal stability, especially CF 3 CF 2 CF 2 OCF (CF 3 ) CF 2 OCF (CF 3 ) COOC 1 6H 3 3 and the CF 3 CF 2 CF 2 OCF-, (CF 3 ) CF 2 < / sub> OCF (CF 3 ) COOC 1 8H 3 7, in a high temperature of approximately 200 ° C is stable. Conductivity Method of the fluorocarbon surfactant decontamination capacity. Compared with hydrocarbon surfactants, such surfactants have good detergency. By measuring the delay of the fluorocarbon surfactant ether volatile, its inhibition performance of volatile ether. The surface modification of the fluorocarbon surfactant on the polyurethane film. Four fluorocarbon-based surfactant was added in the oily polyurethane coating mass concentration of 1%, the contact angle of water on the surface of the polyurethane film, respectively increase of 8.8 °, 9.0 °, 11.4 °, 16.6 °, significantly improves the hydrophobic polyurethane film.

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CLC: > Industrial Technology > Chemical Industry > Reagents and the production of pure chemicals > Surfactant
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