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China Surfactant Detergent & Cosmetics ›› 2019, Vol. 49 ›› Issue (12): 769-773.doi: 10.3969/j.issn.1001-1803.2019.12.001

• Basic research •     Next Articles

Influence of alkali metal counterions on the complexation of polyvinylpyrrolidone with dodecyl sulfates

CHEN Miao-miao,FENG Rui-qin,FANG Yun()   

  1. Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
  • Received:2019-03-25 Revised:2019-11-26 Online:2019-12-22 Published:2019-12-24
  • Contact: Yun FANG E-mail:yunfang@126.com

Abstract:

The complexation between polyvinylpyrrolidone(PVP)and dodecyl sulfates with different alkali metal counterions(Li +, Na + and K +)was studied by tensiometry, conductometry and capillary electrophoresis(CE). The effects of these alkali metal counterions with different hydration radii on the pseudo-polyelectrolyte types and electrolyte strength of PVP-dodecyl sulfate complexes were also investigated. The experimental results of tensiometry and conductometry showed that, the association between PVP and dodecyl sulfates and the bridging degree of counterions both increase with the decrease of hydration radii of alkali metal counterions(Li +>Na +>K +). The CE results showed that, the complexation between PVP and dodecyl sulfates has formed pseudo-polyanions no matter what alkali metal counterion is, but the polyanion properties become strong with the decreasing hydration radii of alkali metal counterions.

Key words: polyvinylpyrrolidone, dodecyl sulfate, alkali metal counterion, pseudo-polyanion

CLC Number: 

  • O647.2