Modified hollow microsphere and application thereof
A hollow microsphere and hollow microbead technology, which is applied in the preparation of microspheres, microcapsule preparations, coatings, etc., can solve the problems of high areal density and narrow absorption band.
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Embodiment 1
[0025] Embodiment 1: A kind of aluminum modified hollow microsphere composite coating
[0026] (1) Preparation of Aluminum Modified Hollow Microspheres
[0027] 1) Pretreatment of hollow microspheres: 20 g of hollow ceramic microspheres were placed in a mixed cleaning reagent, washed at room temperature for 2 hours, rinsed repeatedly with deionized water, and then dried. Add the cleaned hollow ceramic microbeads into 5% hydrofluoric acid solution to roughen them for 5 minutes, then filter them with suction, wash them repeatedly with deionized water, and dry them. The mixed cleaning reagent is: every liter of mixed cleaning reagent contains 50g NaOH, 15g NaOH 2 CO 3 , 15g Na 3 PO 4 and 5g Na 2 SiO 3 , and the balance is water.
[0028] 2) Modification of the hollow microspheres: soak 5 g of the pretreated hollow microspheres obtained in step 1) in 200 mL of distilled water, add 200 ml of 0.25 mol / L aluminum sulfate solution at a constant rate, adjust the pH of the soluti...
Embodiment 2
[0041] Embodiment 2: A kind of aluminum modified hollow microsphere composite coating
[0042] (1) Preparation of Aluminum Modified Hollow Microspheres
[0043] 1) Pretreatment of hollow microspheres: 20 g of hollow ceramic microspheres were placed in a cleaning reagent (50 g / L NaOH solution), washed at room temperature for 2 hours, rinsed repeatedly with deionized water, and then dried. Add the cleaned hollow ceramic microbeads into 5% hydrofluoric acid solution to roughen them for 5 minutes, then filter them with suction, wash them repeatedly with deionized water, and dry them.
[0044] 2) Modification of hollow microspheres: soak 5 g of the pretreated hollow microspheres obtained in step 1) in 200 mL of distilled water, add 0.25 mol / L aluminum sulfate and 0.5 mol / L sodium silicate solution (aluminum sulfate mixed with sodium silicate to obtain an aluminum silicate solution), the pH of the solution was adjusted to 4 with ammonia water, and the stirring was continued for 2 h...
Embodiment 3
[0055] Embodiment 3: A kind of zinc modified hollow microsphere composite coating
[0056] (1) Preparation of zinc-modified hollow microspheres
[0057] 1) Pretreatment of hollow microspheres: 20 g of hollow glass microspheres and hollow ceramic microspheres were placed in a mixed cleaning reagent, washed at room temperature for 2 hours, rinsed repeatedly with deionized water, and then dried. Add the cleaned hollow ceramic microbeads to 5% hydrofluoric acid solution to roughen them for 1 min, then filter them with suction, rinse them repeatedly with deionized water, and dry them. The mixed cleaning reagent is: every liter of mixed cleaning reagent contains 50g NaOH and 15g NaOH 2 CO 3 , and the balance is water.
[0058] 2) Modification of the hollow microspheres: soak 5 g of the pretreated hollow microspheres obtained in step 1) in 200 mL of distilled water, add 200 ml of 0.25 mol / L zinc nitrate solution at a constant rate, and adjust the pH of the solution with urea to be...
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