Table 3.
Physical characterisations of MSKE-loaded microemulsion formulations.
| Formulations | σ a,b (μS/cm) |
pH a,b | RI a,b | η at 1000 s−1
a,b (mPas) |
z-ave a,b (nm) |
PDI a,b |
|---|---|---|---|---|---|---|
| 1% w/w MSKE-loaded w/o microemulsions | ||||||
| 1. Absolute EtOH | 0(0) | 6.98(0.00) | 1.4385(0.0000) | 50.26(0.49) | 16(0) | 0.43(0.01) |
| 2. 96.3% EtOH | 0(0) | 6.96(0.00) | 1.4362(0.0000) | 51.23(0.38) | 17(0) | 0.44(0.01) |
| 3. 1-PA | 0(0) | 6.98(0.00) | 1.4378(0.0000) | 41.00(0.15) | 10(0) | 0.43(0.01) |
| 4. 2-PA | 0(0) | 6.98(0.00) | 1.4371(0.0000) | 46.44(0.46) | 9(0) | 0.42(0.01) |
| 5. 1,2-PA * | 0(0) | 6.84(0.00) | 1.4385(0.0000) | 97.87(0.58) | 11(0) | 0.42(0.02) |
| 6. 1,2-PA ** | 0(0) | 6.70(0.00) | 1.4358(0.0000) | 135.75(1.21) | 70(1) | 0.27(0.01) |
| 1% w/w MSKE-loaded o/w microemulsions | ||||||
| 1. Absolute EtOH | 30(0) | 6.85(0.00) | 1.4256(0.0000) | 41.77(0.13) | 21(0) | 0.30(0.00) |
| 2. 96.3% EtOH | 30(0) | 6.74(0.00) | 1.4248(0.0000) | 36.71(0.12) | 33(0) | 0.17(0.03) |
| 3. 1-PA | 20(0) | 6.78(0.00) | 1.4283(0.0000) | 34.33(0.09) | 25(0) | 0.29(0.00) |
| 4. 2-PA | 20(0) | 6.68(0.00) | 1.4280(0.0000) | 33.61(0.32) | 36(0) | 0.20(0.01) |
a The mean of triplicate experiments; b The experiments were performed at 25 ± 1 °C; () = SD of triplicate experiments, σ = electrical conductivity, RI = refractive index, η = apparent viscosity, z-ave = mean particle size, PDI = polydispersity index; * = MSKE-loaded w/o microemulsion containing IPM (44.55%) and aqueous phase of 1,2-PA (14.85%); ** = MSKE-loaded w/o microemulsion containing IPM (29.70%) and aqueous phase of 1,2-PA (29.70%).