Red phosphorus/polyimide covalent organic framework composite material with excellent flame retardant property and preparation method of red phosphorus/polyimide covalent organic framework composite material

A covalent organic framework and polyimide technology, which is applied in the field of preparation of red phosphorus/covalent organic framework composite materials, can solve the problem of high flame retardant performance of red phosphorus/covalent organic framework composite materials. It can solve problems such as public reports of agents, and achieve the effects of better machining performance, simple and easy-to-obtain raw materials, and improved hygroscopicity.

Active Publication Date: 2020-06-23
YANCHENG SHENYUAN PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there have been no public reports of red phosphorus / covalent organic framework composites with high flame retardant properties, their preparation methods, and their use as flame retardants

Method used

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  • Red phosphorus/polyimide covalent organic framework composite material with excellent flame retardant property and preparation method of red phosphorus/polyimide covalent organic framework composite material
  • Red phosphorus/polyimide covalent organic framework composite material with excellent flame retardant property and preparation method of red phosphorus/polyimide covalent organic framework composite material

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Experimental program
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Effect test

Embodiment 1

[0030] Preparation of Red Phosphorus / Polyimide Covalent Organic Framework Composites

[0031] First, 5g of red phosphorus is added to the concentration of 200mL in the isopropanol dispersion of the polyimide covalent organic framework material of 1g / L, after stirring evenly, the above-mentioned dispersion is placed in a constant temperature ultrasonic water bath for ultrasonication for 5 hours ( The ultrasonic power is 200W), and the temperature is maintained at 40°C during the ultrasonic treatment. Subsequently, the solution after ultrasonic treatment was centrifuged at a rate of 5000r / min, filtered to obtain a dark red powder, and the obtained dark red powder was washed three times with isopropanol, and then dried at 50°C for 10 hours in a blast drying oven. The red phosphorus / polyimide covalent organic framework composite material with a red phosphorus content of 1% by weight can be obtained by naturally cooling to room temperature.

Embodiment 2

[0033] First, 5g red phosphorus is added to the concentration of 200mL in the isopropanol dispersion of the polyimide covalent organic framework material of 5g / L, after stirring evenly, the above-mentioned dispersion is placed in a constant temperature ultrasonic water bath for ultrasonication for 5 hours ( The ultrasonic power is 200W), and the temperature is maintained at 40 degrees during the ultrasonic treatment. Subsequently, the ultrasonically treated solution was centrifuged at a rate of 5000r / min, filtered to obtain a dark red powder, washed three times with isopropanol to the obtained dark red powder, dried in a blast drying oven at 50°C for 10 hours, and cooled naturally The red phosphorus / polyimide covalent organic framework composite material with a red phosphorus weight content of 5% can be obtained at room temperature.

Embodiment 3

[0035] First, 5g of red phosphorus (5nm in size) was added to 200mL of the isopropanol dispersion of polyimide covalent organic framework material (5nm in pore size) with a concentration of 10g / L, and the above-mentioned disperse The solution was placed in a constant temperature ultrasonic water bath for 5 hours (ultrasonic power: 200W), and the temperature was maintained at 40°C during the ultrasonic treatment. Subsequently, the ultrasonically treated solution was centrifuged at a rate of 5000r / min, filtered to obtain a dark red powder, washed three times with isopropanol to the obtained dark red powder, dried in a blast drying oven at 50°C for 10 hours, and cooled naturally The red phosphorus / polyimide covalent organic framework composite material with a red phosphorus content of 10% by weight can be obtained at room temperature.

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Abstract

The invention provides a red phosphorus/polyimide covalent organic framework composite material with excellent flame retardant property and a preparation method thereof. The red phosphorus is improvedby utilizing the unique porous structure of the polyimide covalent organic framework material, and the interior of the red phosphorus-loaded porous polyimide covalent organic framework material is coated. The red phosphorus/polyimide covalent organic framework composite material has excellent flame retardant property, can be used as a flame retardant modified polymer organic material, does not generate molten drops in the combustion process, and has obviously higher flame retardant effect than pure red phosphorus. Furthermore, a feasible way is provided for preparing the red phosphorus flame-retardant material, and the preparation method is high in repeatability and simple in process.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to the preparation and application of a high-efficiency flame-retardant red phosphorus / covalent organic framework composite material. Background technique [0002] Covalent organic framework (COF) is a rapidly developing new direction in the research field of polymer materials. It is a crystalline porous polymer synthesized by a bottom-up approach, and its covalently linked molecular building blocks can be pre-designed on the secondary and tertiary structures, enabling the synthesis of highly ordered rigid porous structures that can be fine-tuned its chemical and physical properties. At present, covalent organic framework materials are generally prepared by thermodynamically reversible reactions, and the synthesis methods mainly include solvothermal method, ionothermal method, microwave radiation method and mechanochemical grinding method. The currently reported reaction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K3/02C08J3/21C08J3/28
CPCC08K3/02C08J3/212C08J3/28C08K2003/026C08L2201/02C08J2379/08C08L79/08Y02E60/10
Inventor 张向阳胡伟达袁柳淑陈根霞
Owner YANCHENG SHENYUAN PLASTIC
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