Process for extracting nano silicon oxide in natural quartz sand and painting thereof

A nano-silica, natural quartz technology, applied in the field of nano-materials, can solve the problems of distrust of nano-technology, inability to propose application methods of nano-materials, etc., and achieve the effect of improving mechanical strength and chemical stability

Inactive Publication Date: 2009-12-23
贺平
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The vast majority of Chinese researchers paid little attention to nanodispersion technology and were unable to pro

Method used

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  • Process for extracting nano silicon oxide in natural quartz sand and painting thereof
  • Process for extracting nano silicon oxide in natural quartz sand and painting thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Soak the washed Hainan Wenchang quartz sand in water, use hydrosulfite to reduce the ferrous ions in the quartz sand to trivalent, dissolve the ferric ions in water with hydrochloric acid, and get a purity of more than 99% after repeated washing of silica-quartz sand. At the same time, with the removal of iron, the sand particles also become smaller from a few millimeters to tens of microns. This phenomenon is considered to be that iron oxide acts as a bonding agent between quartz particles. After three times of crushing, the particle size of the sand is reduced from 50 microns to 1-5 microns.

[0029] Weigh 2 kg of 1-5 micron quartz sand and 18 kg of water, put them into a ball mill, add sodium polyacrylate (60 g) as a dispersant, and ball mill for 48 hours to obtain a 100 nm-sized nano-silica aqueous dispersion.

Embodiment 2

[0030] Embodiment 2: the step of preparing a batch weight part coating process is: a adds polymer polyacrylic acid amine and water in the nano silicon oxide dispersion obtained in the fourth step of claim 1, b at 5000 rpm Under the action of a separate high-speed shear emulsifier, slowly add water-based polyurethane resin emulsion to obtain nano-quartz sand coating.

[0031] The coating method is carried out according to the following weight ratio and components:

[0032] water 10%

[0033] Polyacrylamine 0.5%

[0034] Resin 5%

[0035] Nano silica dispersion 84.5%

Embodiment 3

[0037] The coating method is carried out according to the following weight ratio and components:

[0038] water 30%

[0039] Polyacrylamide 0.55%

[0040] Resin 9.45%

[0041] Nano silica dispersion 60%

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Abstract

The invention discloses a process for extracting nano silicon oxide in natural quartz sand and painting thereof. The process comprises the following extraction steps: 1, washing the quartz sand by water to remove soil; 2, washing the quartz sand by acid to remove iron impurity to obtain more than 99 percent high-purity silicon oxide quartz sand; 3, crushing the quartz sand to obtain powder of 1 to 5 micrometers; 4, soaking the powder quartz sand into the water, adding dispersant into the water, and then applying high shearing force to the water dispersion solution containing the powder quartz sand to form nano silicon oxide dispersion solution within 100 nanometers; and 5, dynamically removing moisture from the nano silicon oxide dispersion solution to obtain loose nano silicon oxide powder. The painting method is carried out by mixing the following components in percentage by weight: 10 to 50 percent of the water, 0.1 to 1 percent of polyacrylamide, 5 to 15 percent of resin, and 34 to 84.9 percent of the nano silicon oxide dispersion solution. The process solves the problem of interface compatibility of the nano quartz sand and organic resin, and greatly improves the mechanical strength and chemical stability of a membranous layer under the condition of the same appearance as the pure resin.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to an extraction and coating process of nanometer silicon oxide in natural quartz sand. Background technique [0002] Nanomaterials are widely recognized for their high surface properties and the transformation of materials science. Governments of various countries have invested a lot of manpower and financial resources in this field. Western developed countries, especially Japan, have achieved a lot of research results and entered people's daily lives. [0003] For a long time, nanomaterials have been obtained through artificial synthesis, which has low yield and high cost, and the discharge of waste liquid and waste gas during the manufacturing process also pollutes the environment. [0004] Natural nanopowders are usually in a highly agglomerated state, with a large number of surfaces superimposed on each other and cannot be exposed, thus showing physical and chemical...

Claims

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Application Information

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IPC IPC(8): C01B33/12C09D175/04
Inventor 贺平
Owner 贺平
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