Preparation method of silicon dioxide microsphere/polyformaldehyde composite material

[0014] Specific embodiment one: the preparation method of a kind of silicon dioxide microsphere / polyoxymethylene composite material of this embodiment is carried out according to the following steps:

[0015] 1. Synthesis of monodisperse silica spheres: a. Add ammonia water and ethanol with a mass percentage of 25% to a three-neck flask, then add silica seed solution, and stir evenly at 220 rpm; b. Keep 25 ℃ constant temperature water bath and 220rpm stirring speed, drop mixed solution A and mixed solution B at the same time, wherein the dropping rate of mixed solution A is 0.10mL / min, the dropping rate of mixed solution B is 0.05mL / min, react for 8 to 10h, get Reaction solution; then the reaction solution is centrifuged to collect the solid phase; c, the solid phase is cleaned with a mass percentage of 99.7% ethanol solution, and then centrifuged to collect the solid phase; d, repeat step c operation 3 ~5 times; then the solid phase was placed in a 60°C oven for drying to

[0018] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the silicon dioxide seed solution described in step 1 is prepared according to the following steps: 364mg L-arginine is added to 276mL distilled water, and after dissolving, add 18mL of cyclohexane, heated to 60°C in a water bath, then stirred with a polytetrafluoroethylene paddle at a speed of about 300rpm, then added 22mL of distilled tetraethyl orthosilicate, and stirred at constant temperature for 20h to obtain a silica seed solution. Others are the same as the first embodiment.

[0019] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the reaction 8h described in step b. Others are the same as those in Embodiment 1 or 2.