A preparation method of a synergistic beauty mask for improving blood circulation
A technology for improving blood circulation and facial mask, applied in skin care preparations, medical preparations containing active ingredients, pharmaceutical formulas, etc. Reduces the risk of skin irritation, avoids cooling of the facial skin, and reduces the effect of use
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Embodiment 1
[0038] Embodiment one: the synthesis of lanthanum boride
[0039] Dissolve sodium borohydride in a sufficient amount of tetrahydrofuran (THF) in a ball mill jar to form a saturated solution, then weigh lanthanum hydroxide (0.19 g) and sodium borohydride (0.227g) powders are added to a ball mill jar, and after ball milling at 400 rpm for 2 hours, a paste is formed, placed in a reactor, heated at 120° C. for 30 minutes to evaporate the solvent THF, to obtain lanthanum hydroxide and A mechanical mixture of sodium borohydride, heating at a rate of 2°C / min, heating to 500°C and holding for 2 hours, releasing hydrogen, cooling to room temperature and then washing with water. During washing, sodium oxide reacts with water to form sodium hydroxide, which dissolves in water , centrifuged, and vacuum-dried at 80°C to obtain nano single-crystal lanthanum boride.
Embodiment 2
[0040] Example 2: Synthesis of thin-walled silica-coated nano single crystal lanthanum boride
[0041]In 90 milliliters of ethanol, add 1 milliliter of ammoniacal liquor (mass concentration is 30wt%) successively and continue stirring for 30 minutes to form a homogeneous solution, then dropwise add 0.1 gram of tetraethyl orthosilicate, and ultrasonically disperse for 40 minutes to form A solution; 10 milliliters of ammoniacal liquor ( Mass concentration is 30wt%) to 20 milliliters of ethanol, then add 10 milliliters of deionized water and 2 grams of monocrystalline lanthanum boride obtained in Example 1 to form a suspension; A solution is added dropwise to the suspension , carry out silica coating; stir for 12 hours, the coating is completed, and centrifuge to obtain thin-walled silica-coated nano single-crystal lanthanum boride.
Embodiment 3
[0042] Example 3: Synthesis of thickened silicon dioxide-coated nano single crystal lanthanum boride
[0043] In 90 milliliters of ethanol, add 2.5 milliliters of ammoniacal liquor (mass concentration is 30wt%) successively and continue to stir for 30min to form a homogeneous solution, then dropwise add 0.25 grams of tetraethyl orthosilicate, ultrasonic dispersion 40 minutes, form A solution; 10 milliliters of ammoniacal liquor ( Mass concentration is 30wt%) to 20 milliliters of ethanol, then add 10 milliliters of deionized water and 2 grams of monocrystalline lanthanum boride obtained in Example 1 to form a suspension; A solution is added dropwise to the suspension , carry out silica coating; stir for 12 hours, the coating is completed, and centrifuge to obtain thickened silica-coated nano single-crystal lanthanum boride.
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