Environment-friendly base oil nano-scale stable emulsion and preparation method thereof
An environment-friendly, base oil technology, applied in the petroleum industry, lubricating compositions, etc., to achieve the effect of simple device, narrow dispersion, and small friction coefficient
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Embodiment 1
[0028] 10 mL of mineral oil nanoemulsion (containing 0.5 mL of mineral oil and 60 mg of amphiphilic block copolymer mPEG- b -PLGA as emulsifier).
[0029] Take 0.5 mL mineral oil and 60 mg mPEG- b -PLGA was dissolved in 4.2 mL of acetone and 0.3 mL of THF. Dissolve mineral oil and mPEG- b - The organic solution of PLGA was mixed with 5 mL of water by a high-speed jet, the Reynolds number was about 7000, and the cavity volume was about 30 uL to obtain a mineral oil nanoemulsion. Emulsifier mPEG- b -PLGA is about 0.1 times the volume of kerosene by volume. The size and distribution of the emulsion droplets were measured by a dynamic light scattering instrument, and the droplet size distribution was as follows: figure 1 shown, the mean diameter d I = 67nm, polydispersity index PDI = 0.10, and stable for at least one week.
Embodiment 2
[0031] Preparation of kerosene nanoemulsions by microcavity high-speed jet mixing using mPEG- b - PLGA as emulsifier formula.
[0032] Take 160 mg mPEG- b -PLGA was dissolved in 3.8 mL of acetone and 0.7 mL of THF, and 0.5 mL of kerosene was added respectively, the dissolved kerosene and mPEG- b - The organic solution of PLGA was mixed with 5 mL of water by high-speed jet, the Reynolds number was about 7000, and the cavity volume was about 30 uL to obtain 10 mL of kerosene nanoemulsion. Emulsion droplet size and time stability within two weeks were tested using a dynamic light scattering instrument, such as figure 2 As shown, it can be seen that the emulsifier mPEG- b -PLGA is about 0.3 times the volume of kerosene by volume, that is, 16.0 mg / mL, and the resulting emulsion has a particle size of less than 200 nm and is stable for at least 1-2 weeks.
Embodiment 3
[0034] Preparation of kerosene nanoemulsion by microcavity high-speed jet mixing, using Tween 80 as emulsifier formulation optimization.
[0035]Dissolve 0.33, 0.25, 0.1 mL kerosene and 0.17, 0.25, 0.4 mL Tween 80 in 3.8 mL acetone and 0.7 mL THF respectively. The organic solution dissolved in kerosene and Tween 80 was mixed with 5 mL of water by high-speed jet flow, the Reynolds number was about 7000, and the cavity volume was about 30 uL to obtain 10 mL of kerosene nanoemulsion. Emulsion droplet size and time stability within a week were tested using a dynamic light scattering instrument, such as image 3 As shown, it can be seen that in the kerosene emulsion formula, the volume of Tween is controlled to be greater than 0.5 times the volume of kerosene and less than 4 times the volume of kerosene, and the particle size of the obtained emulsion is less than 200 nm and is stable for at least one week.
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