Endowing Carbon Black Pigment Particles with Primary Amino Groups

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• 作者：Doreen Piasta ; Cornelia Bellmann ; Stefan Spange ; Frank Simon
• 刊名：Langmuir
• 出版年：2009
• 出版时间：August 18, 2009
• 年：2009
• 卷：25
• 期：16
• 页码：9071-9077
• 全文大小：842K
• 年卷期：v.25,no.16(August 18, 2009)
• ISSN：1520-5827

文摘

A readily synthetic route to endow the surface of hydrophobic carbon black (CB) particles with primary amino groups has been developed. The adsorption of the water-borne polyelectrolyte copolymer poly(vinyl amine-co-vinyl amide) (PVAm) on CB was studied as function of pH and polyelectrolyte concentration. The amino-functionalization process of CB with PVAm strongly depends on pH. As shown by electrokinetic measurement as function of pH, the content of accessible primary amino groups on the surface of CB increases with increasing the OH⁻ concentration. The alternative functionalization of the CB surface with an anionic polyelectrolyte is demonstrated for the adsorption of poly(ethylene-alt-maleic anhydride) (PEMSA). About 50 mg of PVAm can be adsorbed on 1.0 g of CB, which is sufficient to completely alter the surface net charge. The aim of the introduced functional amino groups is their ability to act as anchoring groups for subsequent surface reactions improving the CB’s process ability, compatibility, and adhesion properties.