Method for preparing thermal conducting filler of carbon black coated carbon nano tube
A technology of carbon nanotubes and thermally conductive fillers, applied in fibrous fillers, chemical instruments and methods, inorganic pigment treatment, etc., can solve problems such as difficult dispersion and large agglomeration of carbon nanotubes, and achieve improved dispersion performance, improved dispersion effect, Expand the effect of the application
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Embodiment 1
[0027] Reflux the carbon black and carbon nanotubes with concentrated nitric acid for 9 hours, filter with deionized water until neutral, and dry for later use. The carboxylated carbon black and KH540 were placed in a water bath for 2 hours under nitrogen protection at 65°C, and then filtered with deionized water until neutral. Hydrolyze the carbon black grafted with KH540 in a diluted ethanol solution, and after drying, react with carboxylated carbon nanotubes in toluene at 60°C for 4 hours, then filter the product with deionized water and xylene until neutral, remove Coated particles were prepared from unreacted carbon black and carbon nanotubes, the coating length was about 700nm, and the coating effect was good.
Embodiment 2
[0029] Reflux the carbon black and carbon nanotubes with concentrated sulfuric acid for 12 hours, filter with deionized water until neutral, and dry for later use. The carboxylated carbon black and KH540 were placed in a water bath for 3 hours under nitrogen protection at 80°C, and then filtered with deionized water until neutral. The carbon black grafted with KH540 was hydrolyzed in a diluted ethanol solution, and after drying, it was reacted with carboxylated carbon nanotubes in tetrahydrofuran at 70°C for 4 hours, and the product was filtered with deionized water and xylene until it was neutral and removed The reacted carbon black and carbon nanotubes are used to prepare coated particles with a coating length of about 1600nm and a good coating effect.
Embodiment 3
[0031] Reflux the carbon black and carbon nanotubes with concentrated hydrochloric acid for 6 hours, filter with deionized water until neutral, and dry for later use. The carboxylated carbon black and KH550 were placed in a water bath at 70°C under nitrogen protection for 2 hours, and then filtered with deionized water until neutral. The carbon black grafted with KH550 was hydrolyzed in a diluted ethanol solution, and after drying, it was reacted with carboxylated carbon nanotubes in toluene at 60°C for 6 hours. The reacted carbon black and carbon nanotubes are used to prepare coated particles with a coating length of about 900nm and a good coating effect.
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