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Nano silicon dioxide modified PVB material and preparation method thereof

A nano-silica and modification technology, which is applied in the composite field of polymers and nanoparticles, can solve problems such as the inability to guarantee the strength of glass interlayers, damage to personnel and objects, etc., and achieve the effect of tight combination, increased strength, and close connection

Inactive Publication Date: 2022-02-11
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing PVB film in the middle layer of automobiles cannot guarantee the strength of the glass interlayer well, and it is easy to cause damage to personnel and objects in the event of a collision accident. Therefore, it is necessary to further improve the PVB film in the middle layer of automobiles.

Method used

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  • Nano silicon dioxide modified PVB material and preparation method thereof
  • Nano silicon dioxide modified PVB material and preparation method thereof
  • Nano silicon dioxide modified PVB material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A nano-silica modified PVB material is prepared by introducing nano-silica into the PVB material in situ, and its preparation method comprises the following steps:

[0031] 1) Weigh 25g of polyvinyl alcohol and 200g of deionized water, add 0.1g of antioxidant under the action of mechanical stirring, raise the temperature to 95°C and keep it for 1 hour to ensure that the PVA is completely dissolved; in this example, the antioxidant is β- (3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate;

[0032] 2) Cool down to 25°C, add 0.1g of emulsifier, add 0.1g of nano-silicon dioxide, homogeneously emulsify for 1 hour, add 15g of n-butyraldehyde, continue to cool down to 10°C, add 20g of hydrochloric acid (the concentration of hydrochloric acid is 7wt%), keep Keep the temperature unchanged for 1h; in the present embodiment, the emulsifier is sodium diisooctyl sulfonate;

[0033] 3) Raise the temperature to 70°C at a constant speed, keep it warm for 2 hours, add sodium hydr...

Embodiment 2

[0035] A nano-silica modified PVB material is prepared by introducing nano-silica into the PVB material in situ, and its preparation method comprises the following steps:

[0036] 1) Weigh 20g of polyvinyl alcohol and 250g of deionized water, add 0.05g of antioxidant under the action of mechanical stirring, heat up to 90°C for 2 hours to ensure that PVA is completely dissolved; in this example, the antioxidant is β- (3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate;

[0037] 2) Cool down to 20°C, add 0.05g of emulsifier, add 1g of nano-silicon dioxide, homogeneously emulsify for 1.5h, add 10g of n-butyraldehyde, continue to cool down to 20°C, add 30g of hydrochloric acid (the concentration of hydrochloric acid is 10wt%), keep Keep the temperature unchanged for 2 hours; the emulsifier is sodium diisooctyl sulfonate;

[0038] 3) Raise the temperature to 75°C at a uniform speed, keep it warm for 1 hour, add sodium hydroxide to adjust the pH to 4.5, maintain it for 2 hours...

Embodiment 3

[0040] A nano-silica modified PVB material is prepared by introducing nano-silica into the PVB material in situ, and its preparation method comprises the following steps:

[0041] 1) Weigh 30g of polyvinyl alcohol and 250g of deionized water, add 0.1g of antioxidant under the action of mechanical stirring, raise the temperature to 100°C and keep it for 1 hour to ensure that the PVA is completely dissolved; in this example, in other examples, Antioxidant can also choose β-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, in other embodiments, you can also choose bis(3,5-di-tert-butyl One of the pentaerythritol diphosphites;

[0042] 2) Cool down to 30°C, add 0.05g of emulsifier, add 1g of nano-silicon dioxide, homogeneously emulsify for 1.2h, add 20g of n-butyraldehyde, continue to cool down to 15°C, add 25g of hydrochloric acid (the concentration of hydrochloric acid is 7wt%), keep The temperature remains unchanged for 1.5h; in this embodiment, the emulsifier is sodiu...

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Abstract

The invention provides a nano silicon dioxide modified PVB material and a preparation method thereof. The nano silicon dioxide modified PVB material is prepared by the following steps: 1) weighing polyvinyl alcohol and deionized water, and dissolving an antioxidant under the action of mechanical stirring; 2) cooling, adding an emulsifier and nano silicon dioxide, emulsifying, adding n-butyraldehyde, continuously cooling, adding hydrochloric acid, keeping the temperature unchanged for 1-2 hours, heating to 70-75 DEG C at a constant speed, keeping the temperature for 1-2 hours, adding sodium hydroxide to adjust the pH value to be 4-4.5, keeping the temperature for 1-2 hours, washing, adding sodium hydroxide to the washed sample to adjust the pH value to be 13-14, magnetically stirring for 1-2 hours, washing with water to be neutral, and centrifugally drying; and 3) re-dissolving the dried sample in the ethanol solvent, stirring for 2-3 hours, and then pouring the mixture into a mold for drying. The method is an improvement on the PVB film of the middle layer of the automobile, so that the original glass interlayer has better strength, and the injury to personnel and articles when an impact accident occurs is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of compounding polymers and nanoparticles, and in particular relates to a nano silicon dioxide modified PVB material and a preparation method thereof. Background technique [0002] PVB glass interlayer film is a polymer material formed by polyvinyl butyral resin, plasticized and extruded by a plasticizer. The thickness of PVB glass interlayer film is generally 0.38mm and 0.76mm. It has good adhesion to inorganic glass, and has the characteristics of transparency, heat resistance, cold resistance, moisture resistance, and high mechanical strength. [0003] PVB film is mainly used for laminated glass, which is a special glass made by inserting a layer of PVB film between two pieces of glass, compounding and heating under high pressure. PVB laminated glass is widely used in construction, automobile, photovoltaic and other industries due to its multiple functions such as safety, heat preservation, noise control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/14C08K3/36C08J5/18
CPCC08J5/18C08K2201/011C08J2329/04C08K3/36
Inventor 张嘉良刘应良徐慎刚曹少魁
Owner ZHENGZHOU UNIV
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