A route of alkylated carbon black with hydrophobicity, high dispersibility and efficient thermal conductivity

High dispersibility of carbon black (CB) is a great significance to its interfacial compatibility with organic or inorganic materials. We reported a type of alkyl-carbon black (aCB) nanoparticles with hydrophobic and lipophilic properties which were modified by Octadecyl isocyanate. The water contact angle of aCB was changed from 34.3°/38.9° to 102 ° , which exhibited excellent dispersion ability in organic solutions. Covalent modification of aCB was confirmed by the increase of particle size from 474 nm to 499 nm and the loss of organic groups at temperatures from 30 °C to 800 °C. After reaction between CB and Octadecyl isocyanate, the characteristic band of isocyanate ( N C O) disappeared and formed new amide groups or carbamate, the decrease of O 1 s and C 1 s and the increase of N 1 s confirmed the alkyl chain grafted to the surface of CB. aCB showed an organic-inorganic hybrid and multi-layer substance with disordered and high crystallization capacity.