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Preparation and application of silicane functionalized high-water-solubility silicon dioxide nano particles

A technology of silica and nanoparticles, applied in the field of nanomaterials, can solve the problems of poor water solubility of nano-SiO and achieve good water solubility

Inactive Publication Date: 2011-11-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing highly water-soluble silica nanoparticles of silane functionalization, which overcomes the problem of silane-modified nano-SiO 2 The problem of poor water solubility, and successfully functionalized nano-SiO 2 Particles as multifunctional cross-linking agents to prepare nanocomposite hydrogels

Method used

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  • Preparation and application of silicane functionalized high-water-solubility silicon dioxide nano particles
  • Preparation and application of silicane functionalized high-water-solubility silicon dioxide nano particles
  • Preparation and application of silicane functionalized high-water-solubility silicon dioxide nano particles

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preparation example Construction

[0033] refer to figure 1 , showing a method for preparing highly water-soluble silica nanoparticles functionalized by silane in the present invention, which may specifically include the following steps:

[0034] Step 101, adding the silane coupling agent, hydrochloric acid solution with pH=1-5 6 times the mass of the silane coupling agent, and absolute ethanol into the reaction vessel, and ultrasonically hydrolyzing the silane coupling agent completely;

[0035] Step 102, hydrolyzed silane coupling agent, nano-SiO 2 The solution and deionized water are reacted in a liquid bath for 1-4 hours, and the temperature is controlled at 40-80°C;

[0036] Step 103, add an organic solvent for extraction, and then disperse the lower solid obtained after centrifugation into deionized water; wherein, the organic solvent for extraction is one or a mixture of tetrahydrofuran, ether, acetone, methanol, and ethanol; preferably, The mass ratio of the organic solvent used for extraction to the ...

example 1

[0049] Add 0.5g of vinyltriethoxysilane, 2ml of absolute ethanol, and 3g of hydrochloric acid solution with pH=2 into a 50ml reaction bottle, ultrasonicate for 30 minutes to completely hydrolyze the silane, and mix the hydrolyzed silane with 10g of 30% nano SiO 2 solution, 17g of deionized water was added to a round bottom flask, stirred in a water bath at 80°C for 1 hour, after the stirring was completed, the reaction solution was transferred to a beaker, 180g of tetrahydrofuran was added, stirred vigorously, the solution was loaded into a centrifuge tube, and the Centrifuge at 7000r / min for 10min, redisperse the obtained lower solid in deionized water, put the aqueous solution into a dialysis bag for dialysis for 1 week, and change the water every 24 hours to obtain water-soluble functionalized nano-SiO 2 The solution was concentrated to a concentration of 10% using a rotary evaporator

[0050] 9.5g of functionalized nano-SiO 2 Add the solution into a 30ml vial, pass nitro...

example 2

[0053] Add 1g of vinyltriethoxysilane, 4ml of absolute ethanol, and 6g of hydrochloric acid solution with pH=4 into a 50ml reaction flask, and ultrasonicate for 30 minutes to completely hydrolyze the silane, and mix the hydrolyzed silane with 20g of 30% nano-SiO 2 solution, 14g of deionized water was added to the round bottom flask, stirred in a water bath at 60°C for 2 hours, and after the stirring was completed, the reaction solution was transferred to a beaker, and 200g of methanol and ethanol mixed solution (mass ratio 1: 1) was added, and vigorously Stir, put the solution into a centrifuge tube, centrifuge at 7000r / min for 10min, redisperse the obtained lower layer solid in deionized water, put the aqueous solution into a dialysis bag for dialysis for 1 week, change the water every 24 hours, and obtain the water-soluble function Nano-SiO 2 The solution was concentrated to a concentration of 15% using a rotary evaporator

[0054] 9.5g of functionalized nano-SiO 2 Add the...

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Abstract

The invention belongs to the field of nano materials and discloses a preparation method of silicane functionalized high-water-solubility silicon dioxide nano particles and an application thereof. The preparation method comprises the following steps of: (1) hydrolyzing a silicane coupling agent with a hydrochloric acid solution with pH of 1-5, adding an acidic nano SiO2 solution and the hydrolyzedsilicane coupling agent into a round bottomed flask, stirring for 1-4 hours in a water bath at the temperature of 40-80 DEG C, extracting reaction liquid with an organic solvent and dispersing the reaction liquid into deionized water, dialyzing for one week with the deionized water to obtain a high-water-solubility functionalized nano SiO2 solution; and (2) preparing the functionalized nano SiO2 solution obtained by the step (1) into a solution with the mass fraction of 5-25%, mixing with vinyl monomers and a catalyst to form a uniform aqueous solution, adding an initiator, and carrying out free radical polymerization at room temperature to obtain the high-strength SiO2-based nano compound hydrogel.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to the preparation and application of highly water-soluble silicon dioxide nanoparticles functionalized with silane. Background technique [0002] Nanomaterials are a hot spot in the field of scientific research in the 21st century. Due to their small size effects, surface and interface effects, quantum size effects and macroscopic quantum tunneling effects, nanoparticles have singular physical and chemical properties. [0003] Nano silicon dioxide (SiO 2 ) has excellent stability, reinforcement, thickening and thixotropy, and at the same time has the advantages of easy-to-obtain material sources, low price, low processing energy consumption, and little environmental pollution, so it is very useful in polymer filling and modification. Wide range of applications. Due to nano-SiO 2 The particles are small, the specific surface area is large, and it has a hydrophilic group (-OH), which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K3/36B82Y40/00C08F120/56C08F120/54C08F120/58
Inventor 李欢军许波陈程
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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