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Water repelling soliquoid of nano TiO2 and its prepn.

A technology of nano-titanium dioxide and suspension, which is applied in the field of nanotechnology applications and can solve problems such as poor stability

Inactive Publication Date: 2006-09-20
HUANGHAI HI TECH MATERIALS JILIN PROV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a nano-titanium dioxide hydrophobic suspension and a preparation method thereof, which solves the problem of poor stability of conventional nano-dispersion systems and can be well applied in fields such as textiles, coatings, ceramics, and environmental protection.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 5 grams of nano-titanium dioxide powder was stirred and completely wetted with 12 ml of 5% sodium methylene dinaphthalene sulfonate aqueous solution, added 8 ml of sodium polyacrylate, and then diluted to 200 ml with distilled water and stirred and dispersed for 30 minutes with a FLUKO high-shear disperser. Prepare nano-titanium dioxide hydrophobic suspension. Poured into a 200ml settling cylinder, no precipitation occurred after 24 hours.

Embodiment 2

[0015] Wet 4 grams of nano-titanium dioxide powder with 25ml of 0.6% sodium methylene dinaphthalene sulfonate aqueous solution, add 1.8ml of 25% sodium lignosulfonate aqueous solution, add distilled water to 200ml, and stir with a FLUKO high-shear disperser Disperse for 30 minutes to prepare nano titanium dioxide hydrophobic suspension. Poured into a 200ml settling cylinder, no precipitation occurred after 24 hours.

Embodiment 3

[0017] Wet 6 grams of nano titanium dioxide powder with 5.0% sodium methylene dinaphthalene sulfonate aqueous solution 30ml, add sodium polyacrylate 3ml and 25% lignosulfonate aqueous solution 2ml, add distilled water to 200ml, and use FLUKO high shear Stir and disperse with a disperser for 30 minutes to obtain a stable hydrophobic suspension. Poured into a 200ml settling cylinder, no precipitation occurred after 24 hours.

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PUM

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Abstract

This invention discloses a method for preparing a hydrophobic suspension of titanium dioxide nanoparticles. In the method sodium methylene dinaphthalene sulfonate is used as a high-efficiency wetting agent to adsorb on the surface of titanium dioxide nanoparticles, and acts as a polymer dielectric medium in water to facilitate the infiltration and diffusion of water molecules into the nanoparticles until complete wetting. Moreover, a high-shear dispersing mulser is used, and a composite dispersing system composed of polyacrylate, sodium methylene dinaphthalene sulfonate and lignosulfonate is added. During the dispersing process, new surface formed by nanoparticle separation can be covered by the dispersant in time to form double electric layer and obtain a stable hydrophobic suspension of titanium dioxide nanoparticles. The method can solve the problem of poor stability faced by conventional nanoscale dispersing systems, and facilitate wide applications of nanotechnology in such fields as textile, coating, ceramics and environmental protection.

Description

Technical field: [0001] The invention relates to a nano powder suspension, specifically discloses a nano titanium dioxide hydrophobic suspension, and also provides a preparation method thereof, belonging to the field of nanotechnology application. Background technique [0002] The nano-titanium dioxide involved in the present invention is strictly limited to the particle size range of 1-100 nanometers, but in fact, slightly larger particles (100-300 nanometers) also belong to the scope of the present invention. Since the application of nano-titanium dioxide in the fields of textiles, papermaking, and coatings mostly uses aqueous media, how to disperse it in the aqueous phase is an urgent problem to be solved. Due to the small particle size, large surface area and high free energy of titanium dioxide, the system is in a thermodynamically unstable state, and the particles themselves have a strong tendency to aggregate and flocculate. Therefore, the stability of the nano-dispe...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/00
Inventor 周大凡姜华
Owner HUANGHAI HI TECH MATERIALS JILIN PROV
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