Dendritic flame-retardant layered silicate and preparation method thereof
A dendritic and flame-retardant layer technology is applied in the field of dendritic flame-retardant layered silicate and its preparation, which can solve the problem that the flame-retardant effect of the layered silicate is not significant, and achieve improved flame-retardant and mechanical properties. Effect
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Embodiment 1
[0030] Weigh 75 g of inorganic montmorillonite and 25 mL of 1-butyl-3-methylimidazole hexafluorophosphate into a three-necked flask, and add 50 mL of ethanol with a volume concentration of 40%, heat to about 75°C, and stir for 4 h , Then solid-liquid separation, washing, and vacuum drying at 70°C to obtain organic montmorillonite.
[0031] Weigh 40 g of organic montmorillonite, 1 mol of butanediamine, 2 mol of acrylonitrile and 0.2 mol of iron in a four-necked flask, and stir at 70°C for 8 h under the protection of nitrogen, and then vacuum to remove unreacted monomers. A viscous substance containing grafted organic montmorillonite and ungrafted polymer is obtained. The product was washed with methanol, centrifuged to precipitate, the precipitate was washed with methanol and then centrifuged, and the above steps were repeated until no unreacted substances and polymers were detected in the washing solution. The precipitate was vacuum dried at 30°C for 8 hours to obtain dendritic ...
Embodiment 2
[0034] Weigh 60g of inorganic montmorillonite and 36mL of dialkylimidazole hexafluorophosphate into a three-necked flask, and add 60mL of 50% ethanol aqueous solution with volume concentration, heat to about 78℃, stir for 3h, then separate solid and liquid, and wash , Dried in vacuum at 80°C to obtain organic montmorillonite.
[0035] Weigh 50g of organic montmorillonite, 1 mol of butanediamine, 2.5 mol of acrylonitrile and 0.3 mol of cobalt in a four-necked flask, stir at 80°C for 6 h under nitrogen protection, and then vacuum to remove unreacted monomers. A viscous substance containing grafted organic montmorillonite and ungrafted polymer is obtained. The product was washed with methanol, centrifuged to precipitate, the precipitate was washed with ethanol and then centrifuged, and the above steps were repeated until no unreacted substances and polymers were detected in the washing solution. The precipitate was vacuum dried at 40°C for 7 h to obtain dendritic organic montmorill...
Embodiment 3
[0038] Weigh 35 g of inorganic montmorillonite and 49 mL of 1-(2-hydroxyethyl)-3-methylimidazolium chloride into a three-necked flask, and add 70 mL of ethanol with a volume concentration of 60%, and heat to 80 Stir at about ℃ for 2 h, then separate solid and liquid, wash, and dry in vacuum at 90 ℃ to obtain organic montmorillonite.
[0039] Weigh 60g of organic montmorillonite, 1 mol of butanediamine, 3 mol of acrylonitrile and 0.4 mol of iron in a four-necked flask, and stir at 90°C for 5 h under the protection of nitrogen, and then vacuum to remove unreacted monomers. A viscous substance containing grafted organic montmorillonite and ungrafted polymer is obtained. The product was washed with methanol, centrifuged to precipitate, and the precipitate was washed with isopropanol and then centrifuged. Repeat the above steps until no unreacted substances and polymers were detected in the washing solution. The precipitate was vacuum dried at 50°C for 6 h to obtain dendritic organic...
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