Preparation method of novel nanoscale fire retardant
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A nano-scale, flame retardant technology, applied in the field of coatings, can solve the problems of decreased mechanical properties of materials, easy agglomeration compatibility, affecting the flame retardant properties of materials, etc., to enhance stability, improve flame retardant properties, and improve poor dispersion. Effect
Active Publication Date: 2016-02-24
SHENYANG SHUNFENG NEW MATERIAL CO LTD
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[0003] However, in order to achieve the ideal flame retardant effect, it is usually necessary to add a large amount of intumescent flame retardant, which will cause a significant decrease in the mechanical properties of the material
At the same time, due to the fact that traditional intumescent flame retardants are easy to agglomerate in the material matrix and have poor compatibility with the material matrix, it will lead to uneven dispersion of the flame retardant in the material matrix, easy migration to the surface of the matrix, and poor thermal stability. , which greatly affects the flame retardant performance of the material
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Embodiment 1
[0016] see figure 1 , figure 2 , this embodiment provides a preparation method of a novel nanoscale flame retardant, including the following steps.
[0017] Step 1. Add 1g of p-aminobenzoic acid and 0.3g of sodium hydroxide to the reaction vessel, and add 80ml of distilled water; then slowly add 0.5g of sodium nitrite and 5ml of 20% HCl at 5°C, and stir for 50min; Add 0.4g of reduced graphene after ultrasonication into the solution, and stir at 5°C for 3h; adjust the pH value of the resulting solution to 2-3, and dialyze 3 times with a dialysis membrane, and then wash the resulting product into the medium with an organic solvent properties, that is, benzoic acid functionalized graphene.
[0018] Step 2. Take 1g of benzoic acid-functionalized graphene, and then ultrasonically disperse it in 100ml of tetrahydrofuran, then pour the solution into a 500ml three-necked flask filled with nitrogen; then add 10.82g of triethylamine under ice bath conditions and stir 1.5h, then add ...
Embodiment 2
[0021] This embodiment provides a method for preparing a novel nanoscale flame retardant, which includes the following steps.
[0022] Step 1. Add 2g of p-aminobenzoic acid and 0.4g of sodium hydroxide to the reaction vessel, and add 100ml of distilled water; then slowly add 0.8g of sodium nitrite and 10ml of 20% HCl at 5°C, and stir for 55min; Add 0.5g of reduced graphene after ultrasonication into the solution, and stir at 5°C for 3.5h; adjust the pH value of the resulting solution to 2-3, and dialyze twice with a dialysis membrane, and then wash the resulting product with an organic solvent to Neutral, that is, benzoic acid functionalized graphene.
[0023] Step 2. Take 2g of benzoic acid-functionalized graphene, and then ultrasonically disperse it in 100ml of tetrahydrofuran, and then pour the solution into a 500ml three-necked flask filled with nitrogen. Then add 11g triethylamine under ice bath condition and stir for 2h, then add 4g hexachlorocyclotriphosphazene and sti...
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Abstract
A preparation method of a novel nanoscale fire retardant comprises the following steps: first, performing reduction on oxidized graphene; then, grafting para aminobenzoic acid on graphene to functionalize reduced graphene oxide; finally, grafting phosphonitrilic chloride trimer to further enhance the stability, and grafting chlorine element and phosphorus element on graphene, that is, combining a graphene flame retardant, a phosphorus flame retardant and a halogen flame retardant to prepare the nanoscale flame retardant. Base materials into which the novel nanoscale flame retardant can be added comprise natural rubber, EPDM (Ethylene Propylene Diene Monomer), butadiene styrene rubber and polypropene plastics. Compared with a traditional intumescent flame retardant and a traditional halogen flame retardant, the novel nanoscale flame retardant prepared by the preparation method can effectively solve the problems that the traditional flame retardant is poor in dispersity in material base bodies, weak in surface migration resisting capability, large in addition amount, poor in compatibility, un-ideal in flame-retardant effect, weak in carbon forming capability and the like, so that the flame retardant property of the composite and the compatibility between the flame retardant and the material base body are greatly improved.
Description
technical field [0001] The invention relates to the technical field of coatings, in particular to a preparation method of a novel nanoscale flame retardant. Background technique [0002] With the rapid development of science and technology, the means of human beings to prevent fires emerge in endlessly. Fire-fighting technologies such as smoke detectors and sprinklers play an important role in fire rescue and are widely praised by people. As a major invention of human fire protection technology, flame retardants are the second largest plastic additives after plasticizers, and are widely used in electronics, furniture fabrics, building materials, vehicles and other fields. It is actually very close to us, and it is found in mobile phones, computers, TVs, dormitories, classrooms, subways, and high-speed rails. It silently builds a firewall for us to prevent or slow down the occurrence or spread of fire. Halogen flame retardants are the first flame retardants to be discovere...
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