A method for preparing micron-sized monodisperse polymer microspheres at room temperature
A monodisperse microsphere, micron-scale technology, applied in the direction of microsphere preparation, microcapsule preparation, etc., can solve the problems of limited application and difficult removal, and achieve the effect of simple and reliable method, short time consumption and high yield of microspheres
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Embodiment 1
[0030] 1560 μL of toluene diisocyanate and 2365 μL of trimethylolpropane tris(3-mercaptopropionate) were added to 10 mL of triethylamine in acetonitrile solution at a concentration of 0.00158 g / L, and mixed well; then the two parts of the solution Put it in a reaction container and mix it evenly, seal it; let it stand at room temperature for 2 hours to react; the obtained product is washed successively with acetone and n-hexane, centrifugally precipitated, and vacuum-dried to obtain monodisperse microspheres. The average particle size of the obtained product is 2.259 μm, the polydispersity coefficient is 1.049, and the yield of microspheres is 98.7% ( figure 1 ).
Embodiment 2
[0032] 1025 μL of toluene diisocyanate and 1580 μL of trimethylolpropane tris(3-mercaptopropionate) were added to 10 mL of triethylamine in acetonitrile solution at a concentration of 0.00105 g / L, and mixed well; then the two parts of the solution Put it in a reaction container and mix it evenly, seal it; let it stand at room temperature for 2 hours to react; the obtained product is washed successively with acetone and n-hexane, centrifugally precipitated, and vacuum-dried to obtain monodisperse microspheres. The average particle size of the obtained product was 2.259 μm, the polydispersity coefficient was 1.023, and the yield of microspheres was 96.6%.
Embodiment 3
[0034] 1085 μL of toluene diisocyanate and 1517 μL of trimethylolpropane tris(3-mercaptopropionate) were added to 10 mL of triethylamine in acetonitrile solution at a concentration of 0.00107 g / L, and mixed well; then the two parts of the solution Put it in a reaction container and mix it evenly, seal it; let it stand at room temperature for 2 hours to react; the obtained product is washed successively with acetone and n-hexane, centrifugally precipitated, and vacuum-dried to obtain monodisperse microspheres. The average particle size of the obtained product was 2.263 μm, the polydispersity coefficient was 1.034, and the yield of microspheres was 97.2%.
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