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Mechanical nano sealant and preparation method thereof

A sealant and nanotechnology, applied in the field of sealants, can solve the problems of poor UV resistance and water resistance, and achieve the effects of improving viscosity and flame retardancy, improving mechanical properties and thixotropic properties, and having broad application prospects.

Pending Publication Date: 2022-05-17
HUNAN JINJIAN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Mechanical nano sealant and preparation method thereof
  • Mechanical nano sealant and preparation method thereof
  • Mechanical nano sealant and preparation method thereof

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Embodiment 1

[0047] This embodiment provides a method for preparing a mechanical nano-sealant, which specifically includes the following steps:

[0048] S1. Preparation of the water phase: adding polyethylene glycol octyl phenyl ether to the calcium hydroxide saturated solution to obtain a water phase; wherein, the content of the polyethylene glycol octyl phenyl ether is 1 wt %;

[0049] S2. Preparation of porous nano-calcium carbonate hollow spheres: add 50 parts by weight of the aqueous phase prepared in step S1 to 100 parts by weight of toluene containing 3wt% octenyl succinate starch, emulsify, and the emulsification speed is 11000r / min, emulsify The time is 5 minutes, carbon dioxide gas is passed into the obtained emulsion, the time of passing carbon dioxide is 10 minutes, the ventilation rate is 5L / min, repeat the emulsification and ventilation steps 3 times, centrifuge at 3000r / min for 15min, and dry at 70°C for 2h to obtain a porous Nano calcium carbonate hollow microspheres;

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Embodiment 2

[0058] This embodiment provides a method for preparing a mechanical nano-sealant, which specifically includes the following steps:

[0059] S1. Preparation of the water phase: adding polyoxyethylene sorbitan fatty acid ester to the calcium hydroxide saturated solution to obtain a water phase; wherein, the content of the polyoxyethylene sorbitan fatty acid ester is 3 wt %;

[0060]S2. Preparation of porous nano-calcium carbonate hollow spheres: adding 50 parts by weight of the aqueous phase prepared in step S1 to 100 parts by weight of cyclohexane containing 6 wt% glyceryl monostearate, emulsifying, the emulsifying speed is 13000r / min, The emulsification time is 10 minutes, carbon dioxide gas is passed into the obtained emulsion, the time of passing carbon dioxide is 15 minutes, the ventilation rate is 10L / min, the emulsification and ventilation steps are repeated 7 times, centrifuged at 3000r / min for 15min, and dried at 70°C for 2h to obtain Porous nano calcium carbonate hollo...

Embodiment 3

[0069] This embodiment provides a method for preparing a mechanical nano-sealant, which specifically includes the following steps:

[0070] S1. Preparation of the water phase: adding polyoxyethylene sorbitan fatty acid ester to the calcium hydroxide saturated solution to obtain a water phase; wherein, the content of the polyoxyethylene sorbitan fatty acid ester is 2 wt %;

[0071] S2. Preparation of porous nano-calcium carbonate hollow spheres: add 50 parts by weight of the aqueous phase prepared in step S1 to 100 parts by weight of petroleum ether containing 4.5wt% Span-80, emulsify, the emulsification speed is 12000r / min, and the emulsification time For 7 minutes, carbon dioxide gas was passed into the obtained emulsion. The time of passing carbon dioxide was 12 minutes, and the ventilation rate was 7L / min. Calcium carbonate hollow microspheres;

[0072] S3. Preparation of catalyst solution: Cobalt chloride is dissolved in the Tris-HCl buffer solution with a pH value of 8.2...

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Abstract

The invention provides a mechanical nano sealant and a preparation method thereof, and belongs to the technical field of sealants. Comprising the following steps: S1, preparing a water phase; s2, preparing porous nano calcium carbonate hollow spheres; s3, preparing a catalyst solution; s4, preparation of spiny polydopamine-calcium carbonate composite hollow spheres; s5, preparing a silicon dioxide composite spiny polydopamine-calcium carbonate composite hollow sphere; s6, preparing a modified silicon dioxide composite spiny polydopamine-calcium carbonate composite hollow sphere; and S7, preparing the mechanical nano sealant. The prepared mechanical nano sealant is a silicone sealant, the thixotropic property, the mechanical property, the viscosity and the flame retardance of the sealant are obviously improved by adding the modified silicon dioxide composite thorn-shaped polydopamine-calcium carbonate composite hollow spheres, and meanwhile, the mechanical property of the sealant can be further enhanced by adding the nanofiber-shaped reinforcing agent, so that the mechanical property of the sealant is improved. Wide application prospects are realized.

Description

technical field [0001] The invention relates to the technical field of sealant, in particular to a mechanical nano sealant and a preparation method thereof. Background technique [0002] The full name of silicone sealant is condensation type room temperature vulcanizing silicone rubber (RTV). Excellent weather resistance, aging resistance and high and low temperature resistance performance, widely used in machinery, construction, automobiles, electronic appliances and other fields. Silicone glue has excellent comprehensive properties unmatched by other organic sealants, but its low mechanical properties limit its application in a wider range of fields. [0003] At present, the most effective way to improve the mechanical properties of silicone rubber is filler reinforcement. There are mainly nano-calcium carbonate and fumed silica. Both nano-calcium carbonate and fumed silica have a spherical structure. The reinforcement principle is powder surface adsorption. That is, the...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J11/04
CPCC09J183/04C09J11/04C08K2201/011C08K9/08C08K7/24C08K3/36C08K7/06C08K3/041C08K7/14C08K9/06C08K9/04Y02P20/141
Inventor 文经建
Owner HUNAN JINJIAN NEW MATERIAL TECH
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