Functionalized nanometer silica with ultraviolet ray absorption function group grafted on surface, and preparation method thereof

A technology of nano-silica and surface grafting, which is applied in the treatment of dyed organic silicon compounds, dyed low-molecular organic compounds, and fibrous fillers. It can solve the problems of easy loss, poor extraction resistance, and easy migration. Good dispersibility, solving intolerance to extraction, and improving the effect of comprehensive mechanical properties

Active Publication Date: 2014-06-11
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This functionalized nano-silica as an inorganic nano-filler can not only improve the dispersion of silica in the polymer and the comprehensive mechanical properties of the polymer, but also improve the photo-ox

Method used

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  • Functionalized nanometer silica with ultraviolet ray absorption function group grafted on surface, and preparation method thereof
  • Functionalized nanometer silica with ultraviolet ray absorption function group grafted on surface, and preparation method thereof
  • Functionalized nanometer silica with ultraviolet ray absorption function group grafted on surface, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Aminosilane coupling agent chemical grafting treatment of nano-silica particles: Weigh 10 grams of nano-silica particles (A-200) and disperse them in about 150 ml of toluene and stir to form a stable suspension of silica particles; Then add 5 grams of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, heat, stir and react under toluene reflux for 24 hours and then filter, and the filter is washed three times with toluene and ethanol respectively. To remove the unreacted residue of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, the amount of solvent used for each washing is 150 ml. The washed nano-silica particles grafted with N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane were placed in a vacuum oven and dried at 100° C. for 6 hours. Depend on figure 1 B in figure 2 B in and Figure 3A It can be seen that N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane has been chemically grafted onto the nano-silica particles.

[0042] Preparation of o-hydroxybenzoyl chloride: Weigh ...

Embodiment 2

[0046] The specific technical scheme is basically the same as in Example 1, except that the nano-silica particles (A-200) used are 10 grams, and the N-(β-aminoethyl)-γ-aminopropyltriethoxysilane used is 10 grams, the preparation of o-hydroxybenzoyl chloride is enlarged by 4 times, and the tertiary amine catalyst adopts 0.2 milliliters of triethylamine, and the time for the normal temperature stirring reaction of the functionalized nano-silicon dioxide whose surface is grafted with ultraviolet-absorbing functional groups is 12 Hours, the prepared functionalized nano-silica grafted with UV-absorbing functional groups on the surface is grafted by N-(β-aminoethyl)-γ-aminopropyltriethoxysilane as a bridge to act as a UV The absorber group is o-hydroxybenzoyl, wherein the N-(β-aminoethyl)-γ-aminopropyltriethoxysilane accounts for the function of the surface grafted with ultraviolet absorbing functional groups 11.2% of the total weight of nano silicon dioxide, and the described o-hyd...

Embodiment 3

[0048] The specific technical scheme is basically the same as in Example 1, except that 10 grams of nano-silica particles (A-200) are used, 0.6 grams of gamma-aminopropyl triethoxysilane is used, and 0.35 grams of o-hydroxybenzoyl chloride is used. The reaction of salicylic acid with 8 milliliters of thionyl chloride is prepared, and the organic solvent of functionalized nano silicon dioxide grafted with ultraviolet absorbing functional groups on the surface adopts N, N-dimethylformamide, and the prepared The functionalized nano-silica grafted with ultraviolet absorbing functional groups on the surface is o-hydroxybenzoyl grafted as ultraviolet absorber groups through gamma-aminopropyltriethoxysilane as a bridge, wherein the γ-aminopropyltriethoxysilane accounts for 3.11% of the total weight of the functionalized nano-silica with ultraviolet absorbing functional groups grafted on the surface, and the 2.14% of the total weight of the o-hydroxybenzoyl .

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Abstract

The invention belongs to the field of functionalized nanometer silica, and particularly relates to functionalized nanometer silica with an ultraviolet ray absorption function group grafted on the surface, and a preparation method thereof. According to the present invention, and an amino silane coupling agent is adopted as bridging, and a o-hydroxybenzoyl group adopted as an ultraviolet ray absorption agent group is chemically grafted on nanometer silica particles, wherein the amino silane coupling agent about accounts for 3-12% of the total weight of the functionalized nanometer silica with the ultraviolet ray absorption function group grafted on the surface, and the o-hydroxybenzoyl about accounts for 2-20% of the total weight. The functionalized nanometer silica with the ultraviolet ray absorption function group grafted on the surface has characteristics of excellent ultraviolet ray absorption capacity and good dispersibility, and can be provided for improving the light oxidation aging resistance of the polymer during the use process and increasing the comprehensive mechanical property of the polymer material when the functionalized nanometer silica is adopted as the polymer auxiliary agent.

Description

technical field [0001] The invention belongs to the field of functionalized nano silicon dioxide, in particular to functionalized nano silicon dioxide grafted with ultraviolet absorbing functional groups on the surface and a preparation method thereof. Background technique [0002] In order to reduce the cost of using polymer materials and improve performance, the addition of inorganic fillers and organic functional additives is generally essential. For example, in order to improve the stability of polymer materials during processing and use, and prolong the service life of polymer material products, it is necessary to add various anti-aging agents and other additives. [0003] Adding nano-inorganic fillers such as nano-calcium carbonate, nano-talc powder, nano-montmorillonite, and nano-silica to polymer materials is an important direction for the development of polymer composite materials. Due to their unique small size effect, surface effect and quantum tunneling effect, ...

Claims

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Application Information

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IPC IPC(8): C09C1/28C09C3/12C09C3/08
Inventor 阳明书刘鹏张世民王峰丁艳芬文斌高冲
Owner INST OF CHEM CHINESE ACAD OF SCI
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