A kind of preparation method of carbon nanotube/polymer composite material
A technology of carbon nanotubes and composite materials, which is applied in the field of preparation of carbon nanotubes/polymer composites, can solve the problem of affecting the comprehensive performance of composite materials, increasing carbon tubes, and failing to meet the requirements of preparing high-quality carbon nanotubes and polymer composites and other issues, to achieve the effect of excellent mechanical properties and thermal conductivity
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[0024] The invention provides a kind of preparation method of carbon nanotube / polymer composite material, comprises the following steps:
[0025] The porous polymer is coated with nano-silicon oxide film on the surface through vacuum coating technology;
[0026] Deposit nano metal catalyst film on nano silicon oxide film by vacuum sputtering;
[0027] In-situ growth of arrayed carbon nanotubes on the surface of porous polymers by plasma-enhanced chemical vapor deposition to obtain carbon nanotube / polymer porous composites;
[0028] The carbon nanotube / polymer porous composite material is impregnated with polymer and solidified to obtain the carbon nanotube / polymer composite material.
[0029] The polymer of the porous polymer material is preferably one or more of high temperature resistant polymers such as polyimide, phenolic resin, epoxy resin, polybenzimidazole and polyamide.
[0030] The above-mentioned porous polymer material is preferably prepared according to the follo...
Embodiment 1
[0048] (1) Weigh 3,3,4,4-biphenyldianhydride (BPDA) and 4,4'-diaminodiphenyl ether (ODA) in dimethylacetamide (DMAC) according to the molar ratio of 1:1 , reacted below 0° C. for 5 hours, and then added 1,3,5-triaminophenoxybenzene (TAB) for chemical crosslinking to prepare a polyamic acid (PAA) stock solution with a solid content of 15%. Then, an oligomer fiber mat was prepared by electrospinning technology, and finally imidized at 350° C. to obtain a porous polyimide fiber mat. Scanning electron microscope image of porous polyimide figure 2 shown.
[0049] (2) The prepared porous polyimide material is coated with a 10nm thick silicon oxide film on its surface by vacuum coating technology, and then a layer of 2nm thick silicon oxide film is sputtered on the polyimide by vacuum sputtering. Nickel (or iron, cobalt) thin film, as a catalyst for growing carbon nanotubes. The scanning electron microscope image of the prepared catalyst-loaded polyimide material is shown in im...
Embodiment 2
[0054] (1) Weigh 3,3,4,4-biphenyldianhydride (BPDA) and 4,4'-diaminodiphenyl ether (ODA) in dimethylacetamide (DMAC) according to the molar ratio of 1:1 , reacted below 0° C. for 5 hours, and then added 1,3,5-triaminophenoxybenzene (TAB) for chemical crosslinking to prepare a polyamic acid (PAA) stock solution with a solid content of 15%. Then using freeze-drying technology, the prepared gel was frozen in liquid nitrogen, the solvent was removed by freeze-drying technology, and finally imidized at 350°C to obtain a porous polyimide material.
[0055] (2) The prepared porous polyimide material is coated with a 20nm thick silicon oxide film on its surface by vacuum coating technology, and then a layer of 10nm thick silicon oxide film is sputtered on the polyimide by vacuum sputtering. Nickel (or iron, cobalt) thin film, as a catalyst for growing carbon nanotubes.
[0056] (3) Place the porous polyimide with the catalyst in the PECVD furnace; vacuumize the furnace tube so that t...
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