Method for preparing mesoporous nano particle-enhanced nylon composite material

A nylon composite material and nanoparticle technology are applied in the field of preparation of nano-inorganic particle reinforced nylon composite materials to achieve excellent effects, unique mesoporous structure, and ultra-high specific surface area.

Active Publication Date: 2012-05-30
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the synthesis of nylon-based nanocomposites using this method

Method used

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  • Method for preparing mesoporous nano particle-enhanced nylon composite material
  • Method for preparing mesoporous nano particle-enhanced nylon composite material
  • Method for preparing mesoporous nano particle-enhanced nylon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The inorganic materials involved in the present invention include silicon dioxide, titanium dioxide, etc. In order to better illustrate the present invention, the following is an example in detail with the mesoporous nanometer silicon dioxide / nylon 6 system. The silicon dioxide content of the example product is: 3% wt.

[0021] The first step: hydrolysis of tetraethyl orthosilicate

[0022] Disperse 1 mol of tetraethyl orthosilicate in 1000 ml of water, adjust the pH value of the solution to 3 with phosphoric acid, and react at 80° C. for 2 hours under stirring to form a hydrosol.

[0023] The response is as follows:

[0024] The second step: material mixing

[0025] After mixing 2000 grams of caprolactam and 20 grams of benzoic acid with the hydrosol, they were added to an autoclave. The oxygen in the polymerization tank was evacuated by first vacuuming and then filling with nitrogen. Pre-polymerize under the conditions of 230°C and 2.0MPa for 8 hours, then reduc...

Embodiment 2

[0032] The first step: hydrolysis of tetraethyl titanate

[0033] Disperse 2 mol of tetraethyl orthosilicate in 4500 ml of water, adjust the pH of the solution to 2.1 with phosphoric acid, and react at 45° C. for 4 hours under stirring to form a hydrosol.

[0034] The second step: material mixing

[0035] After mixing 3,000 grams of laurolactam, 36 grams of adipic acid and the hydrosol, they were added to the high-pressure polymerization kettle, and the oxygen in the polymerization kettle was evacuated by first vacuuming and then filling with nitrogen. Pre-polymerize at 270°C and 3.2MPa for 14 hours, then reduce the pressure in the kettle to normal pressure by venting water vapor, control the temperature in the kettle at 235-250°C during the exhaust process, and continue to react at normal pressure for 4 hours , and then perform post-decompression polycondensation to increase the degree of reaction. The temperature of decompression polycondensation is 220°C and the pressure i...

Embodiment 3

[0037] The first step: hydrolysis of aluminate

[0038] Disperse 1 mol of aluminate in 4500 ml of water, use phosphoric acid to adjust the pH value of the solution to 5, and react at 100° C. for 4 hours under stirring to form a hydrosol.

[0039] The second step: material mixing

[0040] After mixing 10,000 grams of nylon 66 salt, 20 grams of adipic acid and the hydrosol, they are added to the high-pressure polymerization kettle, and the oxygen in the polymerization kettle is evacuated by first vacuuming and then filling with nitrogen. Pre-polymerize at 200°C and 0.2MPa for 2 hours, then reduce the pressure in the kettle to normal pressure by venting water vapor, control the temperature in the kettle at 235-250°C during the exhaust process, and continue to react at normal pressure for 1 hour , and then carry out post-decompression polycondensation to increase the degree of reaction. The temperature of decompression polycondensation is 300 ° C, and the pressure is 200 Pa until...

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Abstract

The invention relates to a method for preparing a mesoporous nano particle-enhanced nylon composite material, comprising the following steps: hydrolyzing precursors of inorganic particles in phosphoric acid aqueous solution with pH value of 2-4 to develop hydrosol, mixing the hydrosol, nylon monomer and a molecular weight regulator; and carrying out high-pressure prepolymerization, exhaust depressurization, ordinary polymerization, decompression post polymerization and the like on the mixture in a high-pressure polymerizer to directly obtain the mesoporous nano particle-enhanced nylon composite material in-situ. In the invention, the double in-situ polymerization technology is adopted, and inorganic nano particles and polymer are synchronously generated by in-situ polycondensation, so that the nano particles are in homodisperse with mesoporous structure and superhigh specific surface area, thereby enabling the nano particles to show better enhancing effect.

Description

technical field [0001] The invention relates to a method for preparing a nano-inorganic particle reinforced nylon composite material, in particular to a method for preparing a nylon / mesoporous nanoparticle composite material by double in-situ polymerization. Background technique [0002] Mesoporous materials refer to porous materials with a pore diameter of 2 to 50 nanometers. Because of their unique mesoporous structure, mesoporous materials have an ultra-high specific surface area. In addition to being used as a catalyst carrier, adsorption and separation of organic macromolecules, it can also be used to strengthen polymer materials. Under the premise of good interfacial interaction with polymers, mesoporous materials often show a very obvious reinforcement effect. [0003] The sol-gel method is the most commonly used method for preparing mesoporous materials. Generally, the precursor such as tetraethyl orthosilicate is hydrolyzed in an aqueous solution, and the silicic a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/00C08K7/24C08G69/04
Inventor 李兰杰杨桂生
Owner HEFEI GENIUS NEW MATERIALS
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