양이온 에스테르형 계면활성제인 N-2-hydroxy-3-(2-hydroxyacetoxy)proply-N,N-dimethyl dodecylaminium chloride (HPDA)를 합성하였고, FT-IR 과 ¹H-NMR 분석으로 확인하였다. 합성화합물의 묽은 수용액에 대하여 표면장력을 측정하고, 임계미셀농도를 산정하였다. 표면장력은 10-³∼10-² mol/L 농도 범위에서 33～34 dyne/cm 이었고, 표면장력법에 의해 산정한 임계미셀농도는 8.5 ×10-³ mol/L 이었다. 합성 계면활성제인 HPDA와 SLS, TTAB의 유화특성을 시험하였다. 그 결과 HPDA가 우수한 유화제로 확인되었다. 그리고 Ross-Miles 방법으로 기포력과 기포안정성도 측정하였다.

A cationic ester type surfactant, namely N-2-hydroxy-3-(2-hydroxyacetoxy) proply-N,N-dimethyldodecylaminium chloride(HPDA) was synthesized and confirmed by FT-IR and ¹H-NMR spectroscopy. Surface tensions on the diluted aqueous solutions of the synthetic compounds were measured and evaluated critical micelle concentration. Surface tension was 33～34 dyne/cm in the range of 10-³∼10-² mol/L and critical micelle concentration(c.m.c) value was 8.5×10-³mol/L by surface tension method. Emulsifying properties of the synthetic surfactant(HPDA) and Sodium lauryl sulfate (SLS), tetradecyl trimethyl ammonium bromide (TTAB) was tested. As results, synthetic glycolic acid ester type compounds(HPDA) has been confirmed as a good emulsifier. The foaming power and stability of synthesized ester type surfactant was measured by Ross-Miles method,

• 박종권(충북대학교 공과대학 공업화학과) | Jong-Kwun Park
• 정노희(충북대학교 공과대학 공업화학과) | Noh-Hee Jeong Corresponding author