Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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The Effects of HLB Value of the Surfactants Added in the Silicon Oil Emulsion Antifoamer on the Antifoaming Ability

실리콘오일 에멀젼 소포제 조성에 있어서 유화제의 HLB가 소포성능에 미치는 영향

  • Kim, Young-Ho (Division of Chemical Engineering, Hankyong National University)
  • Received : 2010.05.10
  • Accepted : 2010.09.15
  • Published : 2010.09.30
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Abstract

The effects of HLB value of nonionic mixed surfactants on the stability and antifoaming ability for silicon oil type emulsions were studied. To obtain a stable silicone emulsions, a higher HLB values and higher content of surfactants were preferred. To obtain a good antifoaming ability, however, a lower HLB value (more hydrophobic) and a lower content of the surfactants were preferred. It was observed, at lower HLB values(8 or 9), that the silicone oil drops were spreaded on the foam surface and effectively reduced the surface tension. And the spreading phenomena presumably acted as an antifoaming mechanism. Therefore, a higher hydrophobicity of the silicone oil emulsion resulted in a higher ability of antifoaming action.

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