Patterning of a Surface Immobilized ATRP Initiator with an Inkjet Printer
Patterning of a Surface Immobilized ATRP Initiator with an Inkjet Printer
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DOI：
10.1021/ma902836n
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发表时间：
2010-05
期刊：
影响因子：
5.5
通讯作者：
S. Emmerling;Laura B. N. Langer;Sascha A. Pihan;P. Lellig;J. Gutmann
中科院分区：
文献类型：
--
作者：
S. Emmerling;Laura B. N. Langer;Sascha A. Pihan;P. Lellig;J. Gutmann
采用喷墨打印机将酸滴沉积在原子转移自由基聚合（ATRP）的表面固定化引发剂上，开发了一种微米级聚合物刷的图案化新技术。酸在皂化反应中裂解ATRP引发剂中的酯键。结果，ATRP启动器处于非活动状态。为了控制去功能化程度，从叔醇中得到了一种含有弱酯键的引发剂。与已有的由伯醇衍生的ATRP引发剂相比，该引发剂具有更高的去功能化效率。控制反应时间可以使引发剂分子部分失能，从而控制所述图案内的接枝密度。
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.