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Preparation method and application of a dumbbell-shaped fluorine-containing polyphosphazene modified halloysite nanotube

A technology of halloysite nanotubes and fluorine-containing polyphosphazene, which is applied in the field of flame-retardant materials, can solve problems such as poor hydrophobicity, poor heat resistance, and performance defects, achieve good hydrophobicity and mechanical reinforcement, and improve mechanical properties , reducing the effect of mass and energy transfer

Active Publication Date: 2021-06-01
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For most polymers, although they are widely used, they often have performance defects, which limit their applications
For example, although epoxy resin has a wide range of uses, its application in high-performance fields such as electronics and aerospace vehicles is limited due to its shortcomings such as extremely flammable, poor heat resistance, and poor hydrophobicity.

Method used

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  • Preparation method and application of a dumbbell-shaped fluorine-containing polyphosphazene modified halloysite nanotube
  • Preparation method and application of a dumbbell-shaped fluorine-containing polyphosphazene modified halloysite nanotube
  • Preparation method and application of a dumbbell-shaped fluorine-containing polyphosphazene modified halloysite nanotube

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Preparation of dumbbell-shaped fluorine-containing polyphosphazene-modified halloysite nanotubes: Polyphosphazene polymer is polycondensed at both ends of the halloysite nanotubes, such as figure 1 As shown, specifically: ①Add 0.1-0.5g halloysite nanotubes into the reaction vessel and ultrasonically disperse them in acetonitrile solvent to obtain a dispersion solution; ②Add double-terminal hydroxyl groups to the dispersion solution of halloysite nanotubes fluorine-containing substances, ultrasonically disperse for 30min-1h; ③Slowly drop the acetonitrile solution dissolved in hexachlorocyclotriphosphazene into the above solution, the dropping time is controlled at 30min-50min, and then ultrasonic again for 30min-1h. ④Add an appropriate amount of triethylamine to the above reaction system as an acid-binding agent, and stir at 60-80°C for condensation polymerization for 6-24h; Under the condition of 40-80° C., vacuum drying is carried out to a constant weight to obtain...

Embodiment 2

[0041] (1) Preparation of pure epoxy resin: Weigh 20g of E51 type bisphenol A epoxy resin, heat up to 80°C, add 5g of curing agent 4,4'-diaminodiphenylmethane, stir evenly and vacuumize to remove air bubbles Pour it into the preheated mold, and program the temperature according to the following temperature and time: 120°C / 4h, 140°C / 2h, 180°C / 2h.

[0042] (2) Utilize the dumbbell-shaped fluorine-containing polyphosphazene-modified halloysite nanotubes prepared in Example 1 to modify the epoxy resin: take 20g of E51 type bisphenol A epoxy resin, heat up to 80°C, Weigh 0.2g of dumbbell-shaped fluorine-containing polyphosphazene modified halloysite nanotubes, use acetone for ultrasonic dispersion for 30min, then slowly add to E51 type bisphenol A epoxy resin, remove the solvent under vacuum, and add 5g of curing agent 4,4'-diaminodiphenylmethane, stirred evenly, poured into the mold, and solidified with gradient temperature rise (120°C / 4h, 140°C / 2h and 180°C / 5h in sequence), and f...

Embodiment 3

[0050] (1) Preparation of pure polylactic acid: Dry 100g PLA in an air-blast drying oven at 80°C for 6h, banbury for 10min at a temperature of 175°C and a speed of 100r / min, and mix the samples at 185°C The flat vulcanizing machine is molded into a 3.2mm thick plate and cut into standard splines for later use.

[0051] (2) Utilize the dumbbell-shaped fluorine-containing polyphosphazene-modified halloysite nanotubes prepared in Example 1 to modify polylactic acid: 100g PLA, 5g dumbbell-type fluorine-containing polyphosphazene-modified halloysite nanotubes The preparation of the tube is dried in a blast drying oven at 80°C for 6 hours. After the two materials are mixed, they are banburyed for 10 minutes at a temperature of 175°C and a speed of 100r / min. Molded by a vulcanizing machine into a 3.2 mm thick plate and cut into standard splines for later use to obtain flame-retardant polylactic acid, wherein the content of the dumbbell-shaped fluorine-containing polyphosphazene-modif...

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Abstract

The invention discloses a preparation method and application of dumbbell-shaped fluorine-containing polyphosphazene modified halloysite nanotubes. The heat-stable halloysite and fluorine-containing polyphosphazene have a flame-retardant effect on polymer materials, and the It designs and synthesizes a multifunctional hybrid flame retardant with a special "dumbbell-shaped" structure. The raw material of the dumbbell-shaped fluorine-containing polyphosphazene modified halloysite nanotube is cheap and easy to obtain, and the synthesis and preparation are simple. As the fluorine-containing polyphosphazene polymer of the pipe plug, the organic phosphine nitrogen system can fully capture free radicals, inhibit combustion and promote char formation and dilute gas during combustion.

Description

technical field [0001] The invention belongs to the technical field of flame retardant materials, and in particular relates to a preparation method and application of a dumbbell-shaped fluorine-containing polyphosphazene modified halloysite nanotube. Background technique [0002] With the rapid development of new materials, the demand for multifunctional materials in aerospace, military manufacturing, marine diving, and electronic packaging is increasing, such as light weight, high strength, and good heat resistance. For most polymers, although they are widely used, they often have performance defects, which limit their applications. For example, although epoxy resin has a wide range of uses, its application in high-performance fields such as electronics and aerospace vehicles is limited due to its shortcomings such as extremely flammable, poor heat resistance, and poor hydrophobicity. Therefore, the preparation of multifunctional flame retardants is an inevitable trend in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04C08K7/26C08L63/02C08L67/04C08L75/04
CPCC08K7/26C08K9/08C08K2201/011C08L2201/02C08L63/00C08L67/04
Inventor 戴李宗洪静王秀陈婷武彤鹿振武陈国荣罗伟昂许一婷
Owner XIAMEN UNIV
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