Solid suspension monodisperse emulsion and emulsifying method thereof
A solid suspension, single-distribution technology, used in chemical instruments and methods, mixing methods, dissolution, etc., can solve the problem of unpredictable emulsification effect, and achieve the effect of excellent emulsification effect, good uniformity, and single and stable particle size distribution.
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Embodiment 1
[0030] This example is an example of preparing a solid suspension monodistribution emulsion with a particle size distribution of 8-15 μm
[0031] 1) Preparation of solid suspension: Take an appropriate amount of oily magnesium oxide (MgO) powder (particle size 50-300nm) and disperse it in toluene, and ultrasonicate for 30 minutes to prepare a uniformly dispersed solid suspension with a mass content of MgO of 18.76wt%.
[0032] 2) Prepare the continuous phase: Take an appropriate amount of emulsifier PVA (polyvinyl alcohol, alcoholysis degree 88%, number average molecular weight 55000) into a 500mL beaker, add an appropriate amount of distilled water, and stir magnetically at 30°C for 30 minutes to completely swell the PVA Then, the temperature was raised to 60° C. and stirred for 1 h to obtain a PVA solution with an emulsifier mass content of 3 wt %.
[0033] 3) Emulsification: at 40°C, according to the volume ratio of solid suspension to PVA solution of 1:5 quantity Inject ...
Embodiment 2
[0035] Example 2 (preparation of a solid suspension monodistribution emulsion with a particle size distribution of 20-25 μm):
[0036] 1) Preparation of solid suspension: add an appropriate amount of aqueous titanium dioxide (TiO 2 ) powder (particle size 0.1~3μm) dispersed in deionized water, ultrasonic 30min, prepared TiO 2 A uniformly dispersed solid suspension with a mass content of 9.1 wt%.
[0037] 2) Continuous phase preparation: Take an appropriate amount of emulsifier glyceryl monostearate (molecular formula: C 21 h 42 o 4 ) into an appropriate amount of petroleum ether, and magnetically stirred at 30°C for 1 hour to prepare a glyceryl monostearate solution with an emulsifier mass content of 2 wt%.
[0038] 3) Emulsification: At 30°C, inject the solid suspension into a stainless steel sealed tank according to the volume ratio of the solid suspension to the glycerol monostearate solution of 1:8 (see attached figure 1 , there is a pipeline with a valve at the botto...
Embodiment 3
[0040] Example 3 (preparation of a solid suspension monodistribution emulsion with a particle size distribution of 38-45 μm):
[0041] 1) Preparation of solid suspension: mix oily magnesium oxide (MgO) powder (particle size 50-100nm) and surface-modified ferroferric oxide (Fe 3 o 4 , the surface is organically coated or grafted to be lipophilic, the particle size is 50-100nm) dispersed in n-heptane, and ultrasonicated for 2 hours to obtain a uniformly dispersed solid suspension with a mass content of solid particles of 22.7wt%.
[0042] 2) Continuous phase preparation: Add gelatin and gum arabic at a mass ratio of 1:1 to a 200mL beaker, add an appropriate amount of distilled water, and stir mechanically at 40°C for 1 hour to prepare a gelatin-gum arabic solution with an emulsifier mass content of 3 wt%.
[0043] 3) Emulsification: At 40°C, inject the solid suspension into a stainless steel sealed tank according to the volume ratio of the solid suspension to the gelatin gum ar...
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