Novel modified nano silicon dioxide and composite coating prepared from same

A nano-silica, composite coating technology, applied in the direction of dyeing polymer organic compound treatment, coating, fibrous filler, etc., to achieve the effect of good dispersibility, improved scrub resistance, and improved comprehensive performance

Inactive Publication Date: 2012-06-20
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

At present, the literature on the preparation and modification of inorganic nano-silica using PAMAM as a template has not been reported. According to the research, it has been found that PAMAM has more than 4 generations and almost becomes a spherical structure with a large volume of cavities inside. Contains more functional groups, such as carbonyl (C=O), imide hydrogen (-NH), these active functional groups are the prerequisites for adsorption modification of nano powder silica

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  • Novel modified nano silicon dioxide and composite coating prepared from same
  • Novel modified nano silicon dioxide and composite coating prepared from same
  • Novel modified nano silicon dioxide and composite coating prepared from same

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Embodiment Construction

[0027] The technical solution of the present invention will be described in detail below through specific implementation steps.

[0028] Modified nano silica preparation method of the present invention is as follows:

[0029] Step 1: Preparation of PAMAM template

[0030] (1) Preparation of 0.5 generation PAMAM: put 120g of methyl acrylate and 10g of methanol in a 400mL volumetric flask, stir magnetically at 5°C, pass He protection for 1h, add 10.5g of ethylenediamine and 27.5g of methanol dropwise with a dropping funnel The mixture of g was added dropwise for 1h and passed through He. After the dropwise addition was completed, the reaction was carried out at room temperature for 36h. Use a rotary evaporator to distill under reduced pressure (about 140 Pa, 40° C.) to remove unreacted methyl acrylate and methanol to obtain a slightly yellowish viscous liquid.

[0031] (2) Preparation of 1.0-generation PAMAM: Put 84g of ethylenediamine and 11g of methanol in a 500mL volumetric...

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Abstract

The invention discloses modified nano silicon dioxide and a composite coating prepared from the same. The modified nano silicon dioxide is prepared by mixing G4.0 polyamide-polyamidoaminedendrimer with nano SiO2 powder according to a weight proportion of 25: 12, carrying out magnetic agitation and ultrasonic oscillation under the protection of inert gas, and then modifying. The composite coating is prepared by adding various addition agents into fillers including the modified nano silicon dioxide, titanium dioxide, calcium carbonate and the like and grinding, and then adding emulsion. According to the invention, PAMAM (Polyamidoamine) is used as a template to carry out dry-method modification on nano silicon dioxide to cover one layer of carbon-nitrogen molecules on the surface of the nano silicon dioxide, so that the compatibility between the nano silicon dioxide and a film-forming base material is increased and the dispersity is better; and compared with wet-method modification, certain cost is saved, the process is simple and the modification effect is obvious.

Description

technical field [0001] The invention relates to the modification and application of nanometer powder, in particular to the preparation of water-based nanometer functional paint. Background technique [0002] In recent years, a large number of foreign "high-end paint" products have poured into the Chinese market, which has severely impacted my country's paint industry. Through the detection of such imported "high-end paints", our scientific and technical personnel found that different types of nano-materials were added to them. The small size effect, quantum size effect and surface interface effect greatly improve the scratch resistance, anti-aging, water washing resistance, antistatic, smoothness, contrast ratio, surface hardness and self-cleaning ability of coating products. . For example: foreign countries have successfully developed scratch-resistant, UV-resistant and chemical-resistant transparent automotive topcoat organic / inorganic hybrid resin-based coatings (the si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/10C09D7/12C09D5/02C08K9/04C08K3/36
Inventor 靳涛曾荣昌刘欣张芬
Owner SHANDONG UNIV OF SCI & TECH
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