Preparation method of nitrogen, phosphorus and silicon modified graphene/shape memory polyurethane flame-retardant composite material
A flame-retardant composite material, graphene technology, applied in the field of intelligent coating and packaging, can solve the problems of no flame-retardant components, no flame-retardant function, dispersion, etc., to achieve good flame retardancy and shape memory function, excellent Flame retardant and shape memory function, effect of improving flame retardant performance
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Embodiment 1
[0016] Example 1: Disperse 500 g of graphene oxide in deionized water (1 mg / mL) in a single-necked flask, slowly add 1 g of polyethyleneimine (M n ≈600), nitrogen protection, reaction at room temperature for 24 h, centrifugation, and drying to obtain nitrogen-modified graphene; disperse 250 mg nitrogen-modified graphene in butanone (3 mg / mL), add 1.08 g of 9,10-dihydro -9-oxa-10-phosphaphenanthrene-10-oxide, 0.53 g triethylamine and 0.77 g carbon tetrachloride, under nitrogen protection, reacted at room temperature for 24 h, centrifuged and dried to obtain nitrogen-phosphorus-modified graphene; 200 1 g of nitrogen-phosphorus-modified graphene was dispersed in methyl ethyl ketone (3 mg / mL), 2 g of isocyanate-propyltrimethoxysilane was added, under nitrogen protection, and reacted at 80 °C for 24 h. After centrifugation, nitrogen-phosphorus-silicon-modified graphene was obtained. spare. 10 g polycaprolactone (M n =1000) was placed in a three-necked flask equipped with a stirre...
Embodiment 2
[0017] Example 2: Disperse 500 g of graphene oxide in deionized water (1 mg / mL) in a single-necked flask, and slowly add 3.33 g of polyethyleneimine (M n≈2000), nitrogen protection, reaction at room temperature for 24 h, centrifugation, and drying to obtain nitrogen-modified graphene; disperse 250 mg nitrogen-modified graphene in butanone (3 mg / mL), add 1.08 g of 9,10-dihydro -9-oxa-10-phosphaphenanthrene-10-oxide, 0.53 g triethylamine and 0.77 g carbon tetrachloride, under nitrogen protection, reacted at room temperature for 24 hours, centrifuged and dried to obtain nitrogen-phosphorus-modified graphene; 200 g Nitrogen-phosphorus-modified graphene was dispersed in methyl ethyl ketone (3 mg / mL), 2 g of isocyanate-propyltriethoxysilane was added, under nitrogen protection, reacted at 80 °C for 24 h, centrifuged to obtain nitrogen-phosphorus-silicon-modified graphene, and set aside . 10 g polybutylene adipate (M n =1000) was placed in a three-necked flask equipped with a stirr...
Embodiment 3
[0018] Example 3: Disperse 500 g of graphene oxide in deionized water (1 mg / mL) in a single-necked flask, and slowly add 3.33 g of polyethyleneimine (M n ≈2000), nitrogen protection, reaction at room temperature for 24 h, centrifugation, and drying to obtain nitrogen-modified graphene; disperse 250 mg nitrogen-modified graphene in butanone (3 mg / mL), add 1.08 g of 9,10-dihydro -9-oxa-10-phosphaphenanthrene-10-oxide, 0.53 g triethylamine and 0.77 g carbon tetrachloride, under nitrogen protection, reacted at room temperature for 24 hours, centrifuged and dried to obtain nitrogen-phosphorus-modified graphene; 200 g Nitrogen-phosphorus-modified graphene was dispersed in methyl ethyl ketone (3 mg / mL), 2 g of isocyanate-propyltriethoxysilane was added, under nitrogen protection, reacted at 80 °C for 24 h, centrifuged to obtain nitrogen-phosphorus-silicon-modified graphene, and set aside . 10 g polybutylene adipate (M n =2000) in a three-necked flask equipped with a stirrer, a ther...
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