Generation of electron accepting surface sites in carbon blacks by peracetic acid oxidation

✍ Scribed by John R. Harbour; Mary Jane Walzak; William Limburg; Jack Yanus

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 509 KB
• Volume: 24
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(86)90181-8

✦ Synopsis

Surface oxidation

of three different carbon blacks was carried out using peracetic acid. An electron spin resonance investigation of these oxidized blacks revealed that a ~i~nific~~nt number of surface sites were generated. These surface sites were in equilibrium with the hulk conduction electrons as evidenced by the large deviation from the Curie Law. Electrochemical reduction of these blacks also resulted in electron transfer to these surface sites if5 evidenced by ESR. The ESR results on the reduced and oxidized carbon blacks correlated with the measured contact potentials. This is consistent vvith a mechanism of electron acceptance hy surface sites during contact electrification in a xerographic developer system.