Nanometer composite polyamide/clay material and its prepn and use
A nanocomposite material and polyamide technology, which is applied in the field of exfoliated polyamide/clay nanocomposite materials and its preparation, can solve the problems of insufficient exfoliation of clay sheets, low thermal decomposition temperature of alkylammonium salts, and impact toughness of composite materials. Improve impact toughness, maintain impact toughness, and improve performance
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Embodiment 1
[0038] (1) Add 50.0 g of montmorillonite with a total capacity of cation exchange of 100 meq / 100 g, a particle size of 200 mesh, and 4 g of trimethyl phosphate into 2000 g of deionized water, and stir at high speed for 0.5 hours to obtain an aqueous suspension A of montmorillonite. (2) 10.0 g of aminocaproic acid, 40.0 g of cationic polyacrylamide, and 10.2 g of phosphoric acid were dissolved in 4000 g of deionized water to obtain organic solution B. (3) Add B dropwise to A under stirring, keep the temperature at 80° C., stir and react for 4 hours, cool to room temperature naturally, centrifuge and wash to obtain about 150 g of a filter cake containing 200% water. (4) Then, mix the filter cake, 1800g caprolactam, 54g adipic acid and 36g heat stabilizer at 90°C and stir for 3 hours, continue to heat up to 260°C, the pressure of the kettle is 0.4MPa, and the pressure is maintained for 2 hours. Relieve the pressure to zero, and then start distillation at the same temperature to c...
Embodiment 2
[0041] (1) Add 50.0 g of attapulgite with a cation exchange capacity of 40 meq / 100 g, a particle size of 200 mesh, and 4 g of triphenyl phosphate into 2000 g of ethanol, and stir at a high speed for 0.5 hours to obtain an alcohol suspension A of attapulgite. (2) 5.0 g of caprolactam, 20.0 g of polyvinylpyrrolidone, and 4.5 g of hydrochloric acid were dissolved in 4000 g of deionized water to obtain organic solution B. (3) Add B dropwise to A under stirring, keep the temperature at 80° C., stir for 4 hours, cool to room temperature naturally, centrifuge and wash to obtain about 90 g of a filter cake containing 80% water and ethanol. (4) Then, mix the filter cake, 1800g caprolactam, 18g adipic acid and 36g heat stabilizer and stir at 90°C for 3 hours, then continue to heat up to 260°C, the pressure of the kettle is 1.5MPa, and the pressure is kept for 4 hours. Relieve the pressure to zero, then start distillation at the same temperature and continue the reaction for 6 hours, pre...
Embodiment 3
[0043] (1) Add 25.0 g of montmorillonite 25.0 g of 100 meq / 100 g of cation exchange capacity, 25.0 g of kaolinite of 20 meq / 100 g and 4 g of trimethyl phosphate into 2000 g of deionized water, and stir at high speed for 0.5 hour to obtain a water suspension of clay Liquid A. (2) 6.0 g of undecyl amino acid, 30.0 g of methacrylamide, and 8.6 g of sulfuric acid were dissolved in 4000 g of deionized water to obtain organic solution B. (3) Add B dropwise to A under stirring, keep the temperature at 80° C., stir for 4 hours, cool to room temperature naturally, centrifuge and wash to obtain about 100 g of a filter cake containing 100% water. (4) Then, mix the filter cake, 1800g caprolactam, 36g adipic acid and 18g heat stabilizer at 90°C and stir for 3 hours, then continue to heat up to 260°C, the pressure of the kettle is 1.5MPa, and the pressure is maintained for 2 hours. Relieve the pressure to zero, and then start distillation at the same temperature to continue the reaction fo...
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