Hemicellulose-based intumescent flame retardant and preparation method thereof
An intumescent flame retardant and hemicellulose technology, which is applied in the field of flame retardant materials to achieve the effects of excellent thermal stability, significant economic and environmental benefits, and high promotion and application value
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Embodiment 1
[0063] The embodiment of the present invention provides a hemicellulose-based intumescent flame retardant, and the preparation method includes the following steps:
[0064] Step a, preparation of hemicellulose phytate:
[0065] Weigh 0.6g of hemicellulose and 30g of distilled water into a beaker, heat to 80°C to dissolve completely, add 30g of N,N-dimethylformamide, mix well, then transfer the above solution to a rotary evaporation flask, and at 50 ℃, the vacuum degree is 0.1MPa, and then the water is removed by rotary distillation, and then transferred to a four-necked bottle, and heated to 85 ℃ for standby use;
[0066] 8.8g of 70% phytic acid solution was added to the above-mentioned four-necked flask at 50° C. with a vacuum degree of 0.1MPa after the water was removed by rotary distillation, then 0.3g of anhydrous lithium chloride and 0.2g of p-dimethylaminopyridine were added, and the mixture was stirred. The reaction was carried out for 3 hours, the reaction solution wa...
Embodiment 2
[0075] The embodiment of the present invention provides a hemicellulose-based intumescent flame retardant, and the preparation method includes the following steps:
[0076] Step a, preparation of hemicellulose phytate:
[0077] Weigh 0.6g of hemicellulose and 30g of distilled water into a beaker, heat to 80°C to dissolve completely, add 30g of N,N-dimethylformamide, mix well, then transfer the above solution to a rotary evaporation flask, and at 50 ℃, the vacuum degree is 0.1MPa, and then the water is removed by rotary distillation, and then transferred to a four-necked bottle, and heated to 85 ℃ for standby use;
[0078] 11.3g of 70% phytic acid solution was added to the above-mentioned four-necked flask at 50° C. with a vacuum degree of 0.1MPa after the water was removed by rotary evaporation, and then 0.33g of anhydrous lithium chloride and 0.25g of p-dimethylaminopyridine were added, and stirred. The reaction was carried out for 3 hours. After cooling, the reaction soluti...
Embodiment 3
[0087] The embodiment of the present invention provides a hemicellulose-based intumescent flame retardant, and the preparation method includes the following steps:
[0088] Step a, preparation of hemicellulose phytate:
[0089] Weigh 0.6g of hemicellulose and 30g of distilled water into a beaker, heat to 80°C to dissolve completely, add 30g of N,N-dimethylformamide, mix well, then transfer the above solution to a rotary evaporation flask, and at 50 ℃, the vacuum degree is 0.1MPa, and then the water is removed by rotary distillation, and then transferred to a four-necked bottle, and heated to 85 ℃ for standby use;
[0090] 7.54g of 70% phytic acid solution was added to the above-mentioned four-necked flask at 50° C. with a vacuum degree of 0.1MPa after the water was removed by rotary distillation, then 0.3g of anhydrous lithium chloride and 0.2g of p-dimethylaminopyridine were added, and the mixture was stirred. The reaction was carried out for 3 hours, and the reaction soluti...
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