Method for preparing high-thermal conductivity polyimide/magnesium oxide composite film
The technology of polyimide and composite film is applied in the field of preparation of high thermal conductivity polyimide/magnesium oxide composite film, and can solve the problems of difficulty in realizing large-scale production, poor reliability and durability, and high equipment requirements. Achieve the effect of enhanced bonding, low cost, and improved security
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Embodiment 1
[0029] Add 1000ml DMAc solution in the synthesis reactor, 80.096g4,4'-diaminodiphenyl ether (ODA) is added wherein, stir to make it dissolve completely, then add the PMDA reagent of same molar amount wherein, add 5.0203g via The surface-treated nano-thermal conductive material MgO, the selected MgO particle size is 10nm, 200nm, 1500nm respectively, and the mixing volume ratio of the three is 1:2:3. After using a high-speed shear disperser to fully mix the system; control the mixed system to react at 45°C for about 7 hours, and synthesize polyamic acid resin (PAA) doped with nano-thermal conductive materials.
[0030] After the defoaming treatment, the obtained PAA resin was cast on a stainless steel belt, dried at 120°C for 1 hour to form a film, and then baked at 140°C, 180°C, 220°C, 260°C, and 380°C for 1 hour, and then It was placed in an environment of 350°C for imidization treatment, and a polyimide / magnesia composite film (PI / MgO) with high thermal conductivity was prepa...
Embodiment 2
[0033] Add 1000ml NMP solution to the synthesis reactor, add 80.096g ODA to it, stir to make it completely dissolved, then add the same molar amount of PMDA reagent to it, and add 10.0407g of surface-treated nano-thermal conductive material MgO at the same time, the selected MgO particles The diameters are 10nm, 200nm, and 1500nm, respectively, and the mixing volume ratio of the three is 1:2:4. After using a high-speed shear disperser to fully mix the system; control the mixed system to react at 50°C for about 8 hours, and synthesize polyamic acid resin (PAA) doped with nano-thermal conductive materials.
[0034] After the defoaming treatment, the obtained PAA resin was cast on a stainless steel belt, dried at 130°C for 1 hour to form a film, and then baked at 140°C, 180°C, 220°C, 260°C, and 380°C for 1 hour, and then It was placed in a 400°C environment for imidization treatment to prepare a polyimide / magnesia composite film (PI / MgO) with high thermal conductivity. During th...
Embodiment 3
[0037] Add 1000ml DMF solution to the synthesis reactor, add 80.096g ODA therein, stir to make it dissolve completely, then add the same molar amount of PMDA reagent to it, and add 15.061g of nano thermal conductive material MgO through surface treatment at the same time, the selected MgO particles The diameters are 10nm, 200nm, and 1500nm respectively, and the mixing ratio of the three is 1:2:4.5. After using a high-speed shear disperser to fully mix the system; control the mixed system to react at 55°C for about 9 hours, and synthesize polyamic acid resin (PAA) doped with nano-thermal conductive materials.
[0038]After defoaming treatment, the obtained PAA resin was cast on a stainless steel belt, dried at 140°C for 1 hour to form a film, and then baked at 140°C, 180°C, 220°C, 260°C, and 380°C for 1 hour, and then It was placed in a 400°C environment for imidization treatment to prepare a polyimide / magnesia composite film (PI / MgO) with high thermal conductivity. During the...
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