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Process for in-situ preparation of nano silicon dioxide and boron modified phenol-formaldehyde resin nano composites

A nano-composite material and nano-silica technology, which is applied in the field of in-situ preparation of nano-silica/boron-modified phenolic resin nanocomposites, can solve the problems of high brittleness, poor toughness, and poor heat resistance of phenolic resin. The effect of achieving excellent thermal performance

Inactive Publication Date: 2006-10-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of industry, especially the development of aerospace and other cutting-edge defense technologies, the shortcomings of traditional unmodified phenolic resins such as high brittleness, poor toughness and poor heat resistance limit the development of high-performance materials.

Method used

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  • Process for in-situ preparation of nano silicon dioxide and boron modified phenol-formaldehyde resin nano composites
  • Process for in-situ preparation of nano silicon dioxide and boron modified phenol-formaldehyde resin nano composites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step (1): According to the molar ratio of boric acid / phenol=1 / 3, 28.2g of phenol and 40ml of toluene solution were added into a four-necked flask equipped with a condenser, a thermometer, an electric stirrer and a thermocouple. Raise the temperature to 90°C, then add 6.2g of boric acid, and at the same time adjust the pH value of the solution in the four-neck flask with 0.1mol / L NaOH solution. Dehydration under vacuum. Stop pumping when the liquid is clear and slightly orange, and when there is no water after pumping for a long time;

[0025] Step (2): Dissolve 1 g of surface treatment agent KH570 with 50 ml of toluene solvent. Then add 1.4g gas-phase method nano-SiO to the solution 2 (average diameter 12nm), disperse for 10 minutes under the action of 200kHz ultrasonic waves, and make surface-treated nano-SiO after separating the solvent 2 ; The surface-treated nano-SiO 2 Add to the borate solution prepared in step (1), and disperse for 10 minutes under the action ...

Embodiment 2

[0031] Step (1): According to the molar ratio of boric acid / phenol=1 / 2, 18.8g of phenol and 80ml of ethanol solution are added to a four-necked flask equipped with a condenser, a thermometer, an electric stirrer and a thermocouple. Raise the temperature to 75°C, then add 6.2g of boric acid, and at the same time adjust the pH value of the solution in the four-neck flask with 0.1mol / L KOH solution, when the pH=8, make the solution react at a temperature range of 95°C, while Dehydration under vacuum. Stop pumping when the liquid is clear and slightly orange, and when there is no water after pumping for a long time;

[0032] Step (2): Dissolve 1 g of surface treatment agent KH550 with 100 ml of ethanol solvent. Add 1.59g gas-phase method nano-SiO to the solution again 2 (average diameter 20nm), disperse for 30 minutes under the action of 100kHz ultrasonic waves, and make surface-treated nano-SiO after separating the solvent 2 ; The surface-treated nano-SiO 2 Add to the borate ...

Embodiment 3

[0036] Step (1): According to the molar ratio of boric acid / phenol=2 / 1, 9.4g of phenol and 20ml of isobutanol solution were added to a four-necked flask equipped with a condenser, a thermometer, an electric stirrer and a thermocouple. Heat up to 120°C, then add 12.4g of boric acid, while using 0.1mol / L of Ca(OH) 2 The solution adjusts the pH value of the solution in the four-necked flask, and when the pH value is between 6, the solution is reacted at a temperature range of 130° C. and dehydrated under vacuum at the same time. Stop pumping when the liquid is clear and slightly orange, and when there is no water after pumping for a long time;

[0037] Step (2): Dissolve 1 g of surface treatment agent NDZ201 with 200 ml of n-butanol solvent. Then add 1.75g ​​precipitation method nano-SiO to the solution 2 (average diameter 35nm), disperse for 30 minutes under the action of 40kHz ultrasonic waves, and make surface-treated nano-SiO after separating the solvent 2 ; The surface-tr...

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Abstract

This invention is nano recombination material. Exactly speaking, it's about original position preparation of nanometer silica dioxide / modified alkyd resin. In this invention, we adopt original position polymerization and supersonic auxiliatary decentralization to make sure we get nano powder disseminate at the level of nano. After procession, nano SiO2's surface could form a good interface with modified alkyd resin. It could take advantages of both silica dioxide and modified alkyd resin. So it could be vastly used in high-temperature brake materials, corrosion resistant material, special material and flame-resistant materials.

Description

technical field [0001] The invention belongs to the technical field of nano composite materials, and in particular relates to an in-situ preparation method of nano silicon dioxide / boron modified phenolic resin nano composite materials. technical background [0002] In recent years, polymer and inorganic nanocomposites, as a newcomer in material science, have attracted people's attention greatly. This type of material has the advantages of both polymers and inorganic nanomaterials. Because the interface area between the inorganic nanomaterials and the polymer is very large, and there is a chemical bond between the polymer and the inorganic filler interface, it has ideal bonding properties. It can eliminate the mismatch of thermal expansion coefficient between inorganic substances and polymer matrix, and can give full play to the excellent mechanical properties and high heat resistance of inorganic nanomaterials, and thus produce many excellent in mechanics, optics, electricit...

Claims

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Application Information

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IPC IPC(8): C08G8/28C08K9/00C08K3/38C08K3/36
Inventor 邱军王国建
Owner TONGJI UNIV
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