Method for preparing paraffin dispersion liquid and paraffin microspheres using polymer microspheres as stabilizer
A technology of dispersion and polymer, applied in the field of Pickering emulsion preparation, can solve the problems of lengthy process, high amount of stabilizer, complex system, etc., and achieve the effect of clean ingredients, short time required, and simple experimental process
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Embodiment 1
[0045] Preparation of polymer microspheres by precipitation polymerization: first add 98.0 g of water / ethanol mixed solvent with a mass ratio of 10 / 90 to a 120 mL glass reaction bottle at room temperature, and then add 1.4 g of dodecene and 0.6 g of trimethylol Propane triacrylate and 0.04 g of azobisisobutyronitrile were shaken evenly, and the reaction bottle was sealed and placed in a constant temperature water bath shaker at 70° C., and reacted at a vibration frequency of 120 osc / min for 4 hours. The product was centrifuged with a high-speed centrifuge at 8,000 rpm for 5 min, and the microspheres were washed twice with ethanol, and then dried in an oven at 100° C. for 5 h to obtain polymer microspheres. The scanning electron micrographs of the obtained polymers are shown in figure 1 , the particle size of the microspheres thus measured was 1.3 μm, and the particle size polydispersity coefficient was 1.010.
[0046] Preparation of paraffin dispersion and paraffin microspher...
Embodiment 2
[0048] Polymer microspheres were prepared according to the method described in Example 1.
[0049] Preparation of paraffin wax dispersion and paraffin wax microspheres: Add 0.2 g of polymer microspheres, 10 g of solid paraffin with a melting point of 45 °C and 40 g of water / ethanol mixed solvent with a mass ratio of 20 / 80 into a 100 mL glass bottle at room temperature, After sealing the glass bottle, place it in a constant temperature water bath shaker at 50°C, and vibrate at a vibration frequency of 240osc / min for 30min to obtain a paraffin wax dispersion. Keep the vibration frequency constant, add room temperature water to the constant temperature water bath oscillator to solidify the paraffin droplet. Then the system was left to stand at room temperature for 2 hours, the upper liquid was removed after the system was separated, and the lower solid was dried at 40° C. to obtain paraffin microspheres. The optical microscope photograph of gained paraffin microsphere sees ima...
Embodiment 3
[0051] Polymer microspheres were prepared according to the method described in Example 1.
[0052] Preparation of paraffin wax dispersion and paraffin wax microspheres: Add 0.5 g of polymer microspheres, 12.5 g of solid paraffin with a melting point of 55 °C and 37.5 g of water / ethanol with a mass ratio of 30 / 70 into a 100 mL glass bottle at room temperature For the solvent, seal the glass bottle and place it in a constant temperature water bath shaker at 60°C, shake it at a vibration frequency of 200osc / min for 60min to obtain a paraffin wax dispersion. Keep the vibration frequency constant, add room temperature water to the constant temperature water bath oscillator to solidify the paraffin droplet. Then the system was left to stand at room temperature for 2 hours. After the system was separated, the upper layer liquid was removed, and the lower layer solid was dried at 50° C. to obtain paraffin microspheres. The particle size of the obtained paraffin microspheres was 287 μ...
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