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A dual-phase organic-inorganic hybrid silica sol and its preparation method and application

A hybrid silica sol and inorganic technology, which is applied in the fields of material synthesis and cultural relics protection, can solve the problems of incomplete polymerization, difficult control of penetration speed, toxicity, etc., and achieve the effects of reducing energy consumption, high weather resistance, and energy saving

Active Publication Date: 2021-10-12
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymerized monomer is toxic, and it is easy to be incompletely polymerized, and the penetration rate is also difficult to control.
The above-mentioned reinforcing agents can play the role of reinforcement and protection to a certain extent, but they all have certain deficiencies.

Method used

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  • A dual-phase organic-inorganic hybrid silica sol and its preparation method and application
  • A dual-phase organic-inorganic hybrid silica sol and its preparation method and application
  • A dual-phase organic-inorganic hybrid silica sol and its preparation method and application

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preparation example Construction

[0056] The present invention starts from the preparation of siloxane, and introduces organic components through hydrolysis and polycondensation of siloxane monomers containing organic functional groups and orthosilicates. The introduction of organic components improves the film-forming properties of traditional silica sols and reduces The brittleness of the film increases the bonding performance, compactness, mechanical properties and corrosion resistance. Compared with the traditional particle-based silica gel without chemical bonds (obtained only by physical mixing), the organic chain introduced by copolymerization has a more uniform composition and achieves mixing at the molecular level, which improves the shortcomings of phase separation of traditional composite materials; The introduction of stable Si-C and C-C bonds under hydrolysis conditions, these stable bonds are part of the bonding matrix, which will improve the reinforcement of organic-inorganic hybrid silica gel ba...

Embodiment 1

[0060] The preparation of a dual-phase organic-inorganic hybrid silica sol and its application in the permanent reinforcement of fragile silicate materials comprises the following steps:

[0061] Add 90 g of 1,2-bis(triethoxysilyl)ethane, 140 g of TEOS and 150 g of absolute ethanol into a three-necked round bottom flask, and stir evenly. Use a constant pressure funnel to add 36g of pure water into the three-necked flask, then add two drops of concentrated hydrochloric acid, transfer the three-necked flask to a constant temperature water bath at 70°C, react for 12h, then keep the temperature at 40°C, and distill under reduced pressure at 15kpa for 30min to remove methanol and part of ethanol to get hybrid silica sol as phase A. Take another three-neck round bottom flask and add 34.17g (KH550), rinse with 30g of absolute ethanol, add 1.50g of deionized water dropwise using a constant pressure funnel, and react at 70°C for 1h as Phase B.

[0062] will m A Phase: m B Phase = 9:...

Embodiment 2

[0064] The preparation of a dual-phase organic-inorganic hybrid silica sol and its application in the permanent reinforcement of fragile silicate materials comprises the following steps:

[0065] Add 90 g of 1,2-bis(triethoxysilyl)ethane, 140 g of TEOS and 150 g of absolute ethanol into a three-necked round bottom flask, and stir evenly. Use a constant pressure funnel to add 36g of pure water into the three-necked flask, then add two drops of concentrated hydrochloric acid, transfer the three-necked flask to a constant temperature water bath at 70°C, react for 12h, then keep the temperature at 40°C, and distill under reduced pressure at 15kpa for 30min to remove methanol and part of ethanol to get hybrid silica sol as phase A. Take another three-neck round bottom flask and add 34.17g (KH550), rinse with 30g of absolute ethanol, add 1.50g of deionized water dropwise using a constant pressure funnel, and react at 70°C for 1h as Phase B.

[0066] Mix the mA phase:mB phase=9:1 an...

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Abstract

The invention discloses a dual-phase organic-inorganic hybrid silica sol, a preparation method and application thereof. The two-phase organic-inorganic hybrid silica sol includes organic-inorganic hybrid silica sol and amino silica sol, and the organic-inorganic hybrid silica sol contains a compound of formula I: wherein, x, y, and m are all integers in the formula , R 1 , R 2 , R 4 All are alkyl groups and may be the same or different.

Description

technical field [0001] The invention belongs to the field of material synthesis and cultural relics protection, and specifically relates to the preparation of a dual-phase organic-inorganic hybrid silica sol and its application in the permanent reinforcement of fragile silicates. Background technique [0002] Fragile silicate cultural relics include murals, earthen ruins, broken pottery tires and some fossils. Fragility Silicate cultural relics are under the action of various environmental factors (temperature, humidity, moisture, soluble salts, gas pollutants, mold, animals and plants, etc.), the binding force between the microscopically combined particles is weakened or Disappearance, resulting in increased particle spacing and even falling off, thinning the surface, changing the shape, and even pulverizing the matrix, resulting in the destruction of the fragile silicate that carries cultural information. Therefore, it is particularly important to use suitable materials t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B12/04C04B28/24C04B41/50
CPCC04B12/04C04B28/24C04B41/009C04B41/5089C04B2111/00482C04B2111/00732C04B14/00
Inventor 马西飞彭小红黄晓罗宏杰
Owner SHANGHAI UNIV
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