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China Surfactant Detergent & Cosmetics ›› 2018, Vol. 48 ›› Issue (5): 260-265.doi: 10.13218/j.cnki.csdc.2018.05.004

• Development and application • Previous Articles     Next Articles

Study on the modification of chitosan and its CO2/N2-switchable emulsification

REN Dong-yin, SHANG Zhi-xin, WANG Qi-bao   

  1. School of Chemical and Environmental Engineering,China University of Mining and Technology,Beijing,Beijing 100083,China
  • Received:2018-01-06 Published:2019-03-18

Abstract: 2-(Dimethylamino) ethyl methacrylate (DMAEMA) was grafted onto the molecular structure of chitosan by chemical reaction.FT-IR and 1H NMR were used to characterize the structure of the modified product (CTS-g-DMAEMA).The appearance,conductivity and transmittance of the dispersion of CTS-g-DMAEMA aggregates are repeatedly changed in the stimulation of CO2 and N2,which shows the CO2/N2-switchable behavior of CTS-g-DMAEMA.The emulsification experiment of water-liquid paraffin illustrates that the CTS-g-DMAEMA shows better emulsification capability than the raw chitosan.Moreover,under the action of CO2/N2,the emulsion prepared by CTS-g-DMAEMA can be demulsified and re-emulsified circularly.

Key words: chitosan, 2-(dimethylamino) ethyl methacrylate, grafting modification, CO2/N2-switchable emulsifier

CLC Number: 

  • TQ423.92