Modified polyimide foam material and preparation method thereof
A technology of foam material and polyimide, which is applied in the field of modified polyimide foam material and its preparation, can solve the problems of unsatisfactory flame retardancy of polyimide foam, and achieve uniform cell size and low density , the effect of excellent flame retardant performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0050] The preparation of the Fe-MOF-74@PS includes: dispersing sulfonated polystyrene spheres in a solvent, adding 2,5-dihydroxyterephthalic acid and iron salt, reacting, and the reaction is completed, washing the reaction mixture, After drying, the template agent with Fe-MOF-74 growing on the surface of polystyrene microspheres was obtained, which was recorded as Fe-MOF-74@PS.
[0051] The iron salt is ferrous chloride or ferrous sulfate.
[0052] In some embodiments, the molar ratio of the 2,5-dihydroxyterephthalic acid to the iron salt is 1:2.
[0053] The reaction temperature is 100-150°C, and the reaction time is 12-48h. In some embodiments, the temperature of the reaction is 120° C., and the reaction time is 24 hours.
[0054] In some embodiments, the solvent is a mixed solvent of absolute ethanol, deionized water, and N,N-dimethylformamide (DMF), and the volume ratio of the three is 1:1:1.
[0055] In some embodiments, the mass ratio of the sulfonated polystyrene sp...
Embodiment approach
[0083] According to the embodiment provided by the invention, the preparation method of the modified polyimide foam material comprises:
[0084] (1) Stir and dissolve the aromatic dianhydride in a polar solvent at 80-100°C, then add fatty alcohol to reflux at 60-80°C to obtain a solution;
[0085] (2) Add deionized water, foam stabilizer and catalyst to the above solution, stir and disperse at 50-80°C, then add flame retardant, continue stirring and mixing to obtain a suspension;
[0086] (3) Adding polyisocyanate to the suspension, stirring to obtain a mixed slurry, pouring the mixed slurry into a mold for free foaming to obtain a foam precursor;
[0087] (4) heating and foaming the above-mentioned foam precursor at 150-200° C., and then performing imidization at 250-300° C. to obtain a modified polyimide foam material.
[0088] The consumption of each component is as follows:
[0089]
[0090] In some embodiments, the preparation method specifically includes:
[0091] ...
Embodiment 1
[0097] 1. Preparation of hollow iron oxide / nickel oxide composites coated with flame retardant nitrogen-doped graphite carbon
[0098] (i) Disperse sulfonated polystyrene spheres (with a particle size of 2 μm) in a mixed solvent of absolute ethanol, deionized water, and DMF at a volume ratio of 1:1:1, and add 2 ,5-Dihydroxyterephthalic acid and FeSO 4 , reacted at 120°C for 24h, after the reaction was completed, the reaction mixture was washed and dried to obtain a template agent with Fe-MOF-74 on the surface of polystyrene microspheres, denoted as Fe-MOF-74@PS, in which sulfonated polystyrene The mass ratio of spheres to Fe-MOF-74 is 1:3.
[0099] (ii) 1.5 mol / L nickel sulfate aqueous solution, 8 mol / L sodium hydroxide solution, and 20% ammonia water were continuously added to the reaction kettle containing Fe-MOF-74@PS at the same time, and the reaction temperature was controlled at 50°C , pH=11, and the ammonia content is 0.3mol / L to react until the particle size of the p...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Particle size | aaaaa | aaaaa |
| Particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More