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Citation: GAO Mang-Lai, CHEN Gang. On the Kinetics of Molecular Deposition of Poly(styrenesulfonate)/Poly(diallyldimethylammonium choloride) Films[J]. Chinese Journal of Applied Chemistry, ;2003, 20(10): 972-976. shu

On the Kinetics of Molecular Deposition of Poly(styrenesulfonate)/Poly(diallyldimethylammonium choloride) Films

GAO Mang-Lai ^, ,
CHEN Gang

1.
Faculty of Chemical Engineering, University of Petroleum, Beijing 102249

Corresponding author: GAO Mang-Lai,
Received Date: 22 January 2003
Available Online: 25 June 2003
Fund Project: 重质油加工国家重点实验室开放课题(200205) (200205)

The kinetics of molecular deposition(MD) of poly (styrenesulfonate)(PSS)/poly(diallyldimethylammonium choloride)(PDDA) films was examined. The kinetics results of molecular adsorption reveal the micromechanism of polyelectrolyte MD film. The linear relationship between UV-Vis absorbance of PSS/PDDA and the number of MD film layers confirms alternative deposition of PSS and PDDA layers as that carried out in deposition process. The great variation of contact angle and UV-Vis absorbance with depositing time indicates that the film formation process of the two polymeric molecules comprises two stages:diffusion controlled rapid langmuir adsorption and relative slow rearrangement of molecules on the surface. For the 6^th PSS and 7^th PDDA film, the time of adsorption equilibrium is 35 min and 25 min respectively. The adsorption rate constants for PSS and PDDA are found to be 0.604 mL/(g·s) and 1.231 mL/(g·s), respectively.
- poly(styrenesulfonate),
- poly(diallyldimethylammonium choloride),
- molecular deposition film,
- kinetics
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