Method for preparing nano hollow inorganic microsphere
A hollow and inorganic technology, which is applied in the field of preparing nano-hollow inorganic microspheres, can solve the problems of large diameter of hollow microspheres and difficulty in preparing nano-scale dispersed hollow microspheres, and achieve the effect of low strength
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Embodiment 1
[0072] 5 parts of nonionic silane emulsifier-1 (the nonionic silane emulsifier is trimethoxysilane and undecyl polyethylene glycol methyl ether methacrylate under the catalysis of hexachloroplatinic acid at 120 ° C (prepared by silicon addition reaction) was dissolved in 100 parts of toluene, and 5 parts of distilled water was added dropwise under stirring to obtain an inverse microemulsion. Add 10 parts of tetraethyl orthosilicate dropwise to the microemulsion under stirring, and stir at room temperature for 72 hours under the action of stirring, so that most of the tetraethyl orthosilicate is adsorbed on the oil / water phase interface, hydrolyzed and polycondensed at room temperature React for 72 hours, mature at 110°C for 24 hours, filter, and vacuum dry at 60°C to obtain hollow nano-silica microspheres. The particle size and particle size distribution of the silane emulsifier and the obtained hollow microspheres are shown in Table 1. Particle size and particle size distrib...
Embodiment 2
[0074] 2 parts of non-ionic silane emulsifier-2 (the non-ionic emulsifier is prepared in the same way as in Example 1, and is prepared at 100° C. by hydrosilylation reaction with trimethoxysilane and glycol methacrylate) Dissolve 8 parts of Span-80 in 100 parts of hydrogenated kerosene, and add 6 parts of distilled water and 0.05 parts of triethylamine dropwise into the above liquid under stirring until it becomes a translucent stable inverse emulsion. Under vigorous stirring, slowly add 10 parts of tetraethyl orthosilicate (TEOS) dropwise to the emulsion, continue to stir for 48 hours after the dropwise addition, then ripen, wash with water several times, remove the Span emulsifier, and vacuum dry to obtain Hollow silica microspheres. The structure of the nonionic silane emulsifier and the particle size and distribution of the obtained hollow particles are shown in Table 1.
Embodiment 3
[0076] Dissolve 10 parts of silane emulsifier-1 in Example 1 in 100 parts of toluene, add 5 parts of distilled water and 0.02 parts of hydrochloric acid dropwise into the above liquid under stirring, and stir vigorously until a transparent stable reaction is obtained. Phase emulsion, under stirring, slowly add 10 parts of n-butyl titanate dropwise to the emulsion, after the dropwise addition is complete, continue to stir for 2 days, then ripen, filter, and vacuum dry at 60°C for 24 hours to obtain hollow nano-titanium dioxide Microspheres. The average particle diameter of the silane emulsifier and the obtained hollow microspheres are shown in Table 1.
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