4급 암모늄염을 함유한 마이크로에멀젼의 제조 및 안정성

Preparation and Stability of Microemulsion Containing Quaternary Ammonium Salt

We studied on the preparation and evaluation of O/W type microemulsion containing wax, liquid paraffine and quaternary ammonium salt . And also it was obtained to stability of microemulsions by mono ethylene glycol(MEG) addition. The microemulsions were generally prepared at 96sim97^circC by the phase inversion method. We used polyoxyethylene(20) sorbitan monooleate(POE(20)SMO) and distearyl dimethyl ammonium chloride(D.D.A.C.) as the emulsifiers at microemulsion preparation. From the results, we could get best condition for microemulsion preparation, in case of oil phase, montanic ester wax ; 1.1wt%, paraffine wax ; 1.1wt%, liquid paraffine ; 3.1wt%, propylene glycol ; 0.6wt% and ethylene glycol monobutyl ether ; 0.6wt%, when the ratio(wt%) of D.D.A.C. and POE(20)SMO were 2 : 3. And also we could obtained that the distributed particle size of the final microemulsions were about 8pm1.5nm and the mean particle size was 7pm0.5nm. We got following results from final microemulsions that the percent of transmittance; 96sim98% at 700nm. And the microemulsion blended with MEG of 5sim15wt% showed smaller particle size and more stable distribution than non-containing MEG.