Demulsification Performance and Mechanism of Demulsification of a Dendritic Polyamidoamine


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Abstract

The process of synthesis of 1st-, 2nd- and 3rd-generation dendritic polyamidoamines (PAMAM), using ammonia and ethylenediamine, is described. It is shown that the oil drops disintegration rate constant and the degree of breakdown of a stable oil–water emulsion increase with each subsequent generation of the dendrimer and with its increasing concentration. The maximally attained degree of separation of water containing 68 mg/L of oil was 84.6% with the addition of 20 mg/L of 3rd-generation PAMAM. The demulsification mechanism is shown to be associated with the spherical shape of the dendritic PAMAM macromolecules and the presence of a large number of polar amino functional groups on the surface of these spheres.

About the authors

Yang Xinliang

Northeast Petroleum University

Author for correspondence.
Email: yangdagang2012@163.com
China, Daqing

Ai Chi

Northeast Petroleum University

Email: yangdagang2012@163.com
China, Daqing

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