A kind of sea urchin-shaped double-shell hollow microsphere and its preparation method

A double-shell, sea urchin-like technology, applied in the field of nanomaterials, achieves the effects of regular morphology, good barrier properties and uniform size

Active Publication Date: 2019-04-12
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a single reflective coating or barrier coating has limitations in practical applications
Some researchers obtain barrier and reflective insulation materials by combining multiple materials, but such methods are prone to compatibility problems

Method used

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  • A kind of sea urchin-shaped double-shell hollow microsphere and its preparation method
  • A kind of sea urchin-shaped double-shell hollow microsphere and its preparation method
  • A kind of sea urchin-shaped double-shell hollow microsphere and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Measure 15mL polystyrene microsphere emulsion, dilute it with 18mL distilled water and 75mL isopropanol, then adjust the pH value to 9.5 with ammonia water, add 1g tetraethyl orthosilicate dropwise with a rubber dropper, and drop it for about 2 minutes , then mechanically stirred at 40°C and 300r / min for 5h, the product was centrifuged, washed with isopropanol for 1 to 3 times, and dried in an oven at 50°C for 4h to obtain polystyrene / dioxide with a particle size of 50nm to 500nm Silicon core-shell particles.

[0031] (2) Weigh 0.03g of polystyrene / silica core-shell particles, disperse them in 15mL of absolute ethanol by ultrasonic (the power of ultrasonic is 500W, and the time is 10min), and then add 24mL of titanium with a mass concentration of 1%. After the addition of tetrabutyl ester in absolute ethanol, react at 300r / min and 75°C for 4h, centrifuge the product, and wash it with absolute ethanol for 1 to 3 times to obtain polystyrene / silicon dioxide / titanium di...

Embodiment 2

[0034] (1) Measure 22mL polystyrene microsphere emulsion, dilute it with 21mL distilled water and 81mL isopropanol, then adjust the pH value to 10.0 with ammonia water, add 1.4g tetraethyl orthosilicate dropwise with a rubber dropper for about 2 minutes After completion, mechanically stir at 50°C and 300r / min for 5h, centrifuge the product and wash it with isopropanol for 1 to 3 times, and dry it in an oven at 40°C for 6h to obtain polystyrene / dicarbonate with a particle size of 50nm to 500nm. Silica core-shell particles.

[0035](2) Weigh 0.09g of polystyrene / silica core-shell particles, disperse them in 18mL of absolute ethanol by ultrasonic (the power of ultrasonic is 200W, and the time is 20min), and then add 24mL of titanium with a mass concentration of 1%. After the addition of tetrabutyl ester in absolute ethanol, react at 300r / min and 75°C for 3h, centrifuge the product and wash it with absolute ethanol for 1 to 3 times to obtain polystyrene / silicon dioxide / titanium di...

Embodiment 3

[0038] (1) Measure 24mL polystyrene microsphere emulsion, dilute it with 22mL distilled water and 82mL isopropanol, then adjust the pH value to 10.1 with ammonia water, add 1.8g tetraethyl orthosilicate dropwise with a rubber dropper for about 3 minutes After completion, mechanically stir at 60°C and 300r / min for 6h, centrifuge the product, wash with isopropanol for 1 to 3 times, and dry in an oven at 60°C for 4h to obtain polystyrene / dicarbonate with a particle size of 50nm to 500nm. Silica core-shell particles.

[0039] (2) Weigh 0.07g of polystyrene / silica core-shell particles, disperse them in 21mL of absolute ethanol by ultrasonic (the power of ultrasonic is 300W, and the time is 15min), and then add 24mL of titanium with a mass concentration of 1%. After the addition of tetrabutyl ester in absolute ethanol, react at 300r / min and 80°C for 3h, centrifuge the product and wash it with absolute ethanol for 1-3 times to obtain polystyrene / silicon dioxide / titanium dioxide For ...

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Abstract

The invention relates to urchin-like double-shell hollow microspheres and a preparation method thereof. The preparation method comprises the following steps: carrying out ultrasonic dispersion on polystyrene / silicon dioxide core-shell particles in anhydrous ethanol, dropwisely adding a tetrabutyl titanate anhydrous ethanol solution, and reacting at 75-85 DEG C for 2-4 hours to obtain polystyrene / silicon dioxide / titanium dioxide multi-core-shell particles; calcining the polystyrene / silicon dioxide / titanium dioxide multi-core-shell particles to obtain double-shell hollow silicon dioxide / titanium dioxide microspheres; and carrying out ultrasonic dispersion on the double-shell hollow silicon dioxide / titanium dioxide microspheres in a glycerol-anhydrous ethanol mixed solution, adding tetrabutyl titanate, stirring uniformly, transferring the mixture into a reaction kettle, and reacting at 140-220 DEG C for 7-12 hours, thereby obtaining the urchin-like double-shell hollow microspheres. The urchin-like double-shell hollow microspheres have lower heat conductivity coefficient, and have excellent absorption effects on UVA and UVB in UV light.

Description

technical field [0001] The invention belongs to the field of nanometer materials, in particular to a sea urchin-shaped double-shell hollow microsphere and a preparation method thereof. Background technique [0002] Insulation materials are divided into barrier type, reflection type and radiation type according to their insulation mechanism. At present, thermal insulation materials mainly use inorganic particles to shield and reflect ultraviolet light and near-infrared light to achieve heat insulation effects, that is, reflective coatings; in addition, there are some that use airgel or hollow glass beads, etc. Barrier coatings that can store air and other substances with low thermal conductivity for thermal insulation. However, a single reflective coating or barrier coating has limitations in practical applications. Some researchers have obtained barrier and reflective insulation materials by combining multiple materials, but such methods are prone to compatibility problems...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18C01G23/053C01G23/08C09K5/14
CPCC01B33/18C01G23/053C01G23/08C01P2004/03C01P2004/34C01P2004/82C01P2006/32C01P2006/60C09K5/14
Inventor 鲍艳康巧玲高敏马建中
Owner SHAANXI UNIV OF SCI & TECH
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