Paper-based electromagnetic shielding composite material with flame retardant property as well as preparation method and application thereof
A technology of electromagnetic shielding and composite materials, which is applied in the fields of magnetic field/electric field shielding, synthetic cellulose/non-cellulose material pulp/paper, paper coating, etc. It can solve problems such as easy agglomeration of wave-absorbing fillers and poor paper-making performance of PI fibers , to achieve the effect of improving surface inertia, good heat resistance and electromagnetic shielding performance, and high production efficiency
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Embodiment 1
[0058] Disperse 3.0g of PI fiber (3mm, purchased from Jiangsu Aoshen New Material Co., Ltd.) in water evenly, then add 2.0g of dopamine hydrochloride and 2.4g of trishydroxymethylaminomethane, react at room temperature for 6 hours, then add 0.4g The carbon nanotubes were stirred and reacted for 12 hours, and finally filtered, washed, and dried at 105° C. to obtain PI fibers modified by carbon nanotubes. Disperse 1.32g of modified PI fibers and 0.56g of aramid pulp (moisture content 84.2%, degree of beating 27°SR, 0.3-0.6mm, purchased from Shenzhen Fiber Valley Co., Ltd.) in water, and finally use Wet papermaking technology sheets, pressed at 0.4MPa for 5 minutes, and then dried at 105°C for 5 minutes to obtain carbon nanotube / PI fiber paper;
[0059] Add 0.035 g of nickel acetate, 0.005 g of cobalt acetate, and 0.050 g of 2,3,6,7,10,11-hexahydroxytriphenylene into 20 mL of water, followed by 10 cm × 10 cm of carbon nanotube / PI fiber paper (0.6 g) , react at 85°C for 12h, and ...
Embodiment 2
[0062] By adjusting the amount of carbon nanotubes, the mass ratio of dopamine and PI fibers in Example 1, and keeping other parameters consistent with Example 1, a paper-based electromagnetic shielding composite material with flame-retardant properties was obtained.
[0063] The performance test of the obtained paper-based electromagnetic shielding composite material with flame-retardant properties was carried out, and the test results are shown in Table 1. As can be seen from Table 1, when the mass ratio of the amount of carbon nanotubes, dopamine hydrochloride, and PI fibers is 2:10:15 (embodiment 1), from the analysis of mechanical properties, electrical conductivity, temperature resistance and electromagnetic shielding properties, The comprehensive properties of the prepared paper-based electromagnetic shielding composite material with flame retardant properties are better.
[0064] Table 1 Performance test results of paper-based electromagnetic shielding composite materi...
Embodiment 3
[0067] Adjust the mass ratio of Example 12, 3, 6, 7, 10, 11-hexahydroxytriphenylene, dopamine, and PI fiber paper, and keep other parameters consistent with Example 1 to obtain an electromagnetic shielding paper-based composite material with flame retardant properties .
[0068] The performance test of the obtained paper-based electromagnetic shielding composite material with flame-retardant properties was carried out, and the test results are shown in Table 2. As can be seen from Table 2, when the mass ratio of 2,3,6,7,10,11-hexahydroxytriphenylene, dopamine hydrochloride, and PI fiber paper is 1:40:12 (embodiment 1), from mechanical properties, electrical conductivity Performance, temperature resistance and electromagnetic shielding performance analysis, the comprehensive performance of the prepared paper-based electromagnetic shielding composite material with flame retardant properties is better.
[0069] Table 2 Performance test results of paper-based electromagnetic shie...
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