Patterning of a Surface Immobilized ATRP Initiator with an Inkjet Printer

详细信息    查看全文

• 作者：Sebastian G. J. Emmerling ; Laura B. N. Langer ; Sascha A. Pihan ; Philipp Lellig ; Jochen S. Gutmann
• 刊名：Macromolecules
• 出版年：2010
• 出版时间：June 8, 2010
• 年：2010
• 卷：43
• 期：11
• 页码：5033-5042
• 全文大小：987K
• 年卷期：v.43,no.11(June 8, 2010)
• ISSN：1520-5835

文摘

A new technique for patterning polymer brushes on the micrometer scale has been developed in which an inkjet printer was used to deposit droplets of acid on a surface-immobilized initiator for atom transfer radical polymerization (ATRP). The acid cleaved an ester bond in the ATRP initiator in a saponification reaction. As a result, the ATRP initiator was rendered inactive. To control the degree of defunctionalization, a new initiator containing a weak ester bond was derived from a tertiary alcohol. Comparison to an established ATRP initiator, derived from a primary alcohol, showed that the novel initiator was defunctionalized with a higher efficiency. Control of the reaction time allowed to partially defunctionalize the initiator molecules, leading to control of grafting densities within the written patterns.