Study On Preparation Of Grafted Carbon Black And Dispersion Stability

Carbon black is a special kind of carbonaceous material on the microstructure, particle configuration and surface behavior. It has good chemical stability, resistance to light and heat, and weatherability.It is a perfect black pigment for its excellent bepainted quality. Based on the principle of acid-base reaction, the automatic electrometric titration has been used for the quantitative determination of the oxygenic functional groups, such as carboxyl, hydroxyl, lactone and total acidity.In this thesis, hydroxymethyl was introduced onto the surface of carbon black, which had experienced oxidization and hydroxymethylation. Then, butyl acrylate (BA) was initiated and grafted onto the surface of carbon black in the presence of Cerium ion. The dispersibility of the grafted carbon black in the absolute alcohol was improved a lot. The dispersion of the carbon black grafted by butyl acrylate shows high resistance to high temperature.The ultrasonic field was applied to the preparation of grafted carbon black.The particles can be separated effectively.Polyvinyl alcoholwas introduced onto the surface of carbon black.Then the grafed carbon black reacted with formaldehyde in order to synthesis polyvinyl butyral which was introduced onto the surface of carbon black. The dispersibility of the grafted carbon black in the absolute acetone was improved a lot. The dispersion of the carbon black grafted by polyvinyl butyral shows high resistance to high temperature.Cu-coated carbon black was first prepared by electroless plating. In addition, the grafted carbon black was characterized by IR spectrum ,TEM,XRD and so on.