합성마그네타이트를 이용한 유상자성유체의 제조 및 분산특성

Preparation and Dispersion Characteristics of Oil-based Magnetic Fluids with Synthesized Magnetite

  • 조명호 (삼성종합기술원 광미디어연구실) ;
  • 김만 (㈜고합 신소재팀) ;
  • 민동준 (연세대학교 금속공학과) ;
  • 오재현 (연세대학교 금속공학과)
  • 발행 : 1996.08.01

초록

The oil-based magnetic fluids were prepared with synthesized ultrafine magnette by allowing surfactactants such as sodium oleate and aliquat 336 to adsorb on the surface of magnetite particles. The dispersion ratio of oil-based magnetic fluids was higher than 90% when the amount of sodium oleate and aliqua 336 were more than 2.63$\times$10-2 mol and 6.56$\times$10-3 mol for 20g of magnetite respectively. The dispersion ratio of oil-based magnetic fluids with the amount of secondary surfactant addition was higher than 90% when oil-based magnetic fluids were prepared with aliquat 336 of cationic type. However oil-based magnetic fluids prepared with surfactants of anionic and nonionic type showed lower dispersion than whose with cationic surfac-tants.

키워드

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