Mun Mu Kyeom, Jang Yun Jong, Kim Ju Eun, Yeom Geun Young, Kim Dong Woo
Department of Materials Science and Engineering, Sungkyunkwan University Suwon Kyunggi-do South Korea 440-746
SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University Suwon Kyunggi-do South Korea 440-746.
RSC Adv. 2019 Apr 25;9(23):12814-12822. doi: 10.1039/c8ra10391g.
By using DBD-type atmospheric pressure plasmas and a dopamine solution mist formed by a piezoelectric module, the possibility of depositing functional polymer films showing the physical and chemical characteristics of polydopamine without breaking the functional group of the dopamine has been investigated for different plasma voltages. The higher DBD voltages up to 3.0 kV decreased the functional groups such as catechol and amine (N/C ratio) relative to dopamine in the deposited polymer by increasing the dissociation of dopamine into atoms and small molecules due to higher electron energies. In contrast, the lower DBD voltages up to 1.5 kV increased the functional group and N/C ratio of dopamine in the deposited polymer by keeping the molecular structures of the dopamine due to lower electron energies. Therefore, the polymer deposited at the lower DBD voltages showed lower contact angles and higher metal absorption properties which are some of the surface modification characteristics of polydopamine. When the metal absorption properties of the polydopamine-like film deposited using the atmospheric pressure plasma of a low DBD voltage with a dopamine solution mist were compared with other metal absorbers for Cu, As, and Cr, the polydopamine-like film exhibited superior metal absorption properties. It is believed that this atmospheric pressure plasma process can be also applied to the plasma polymerization of other monomers without breaking the functional groups of the monomers.
通过使用介质阻挡放电（DBD）型大气压等离子体和由压电模块形成的多巴胺溶液雾，研究了在不同等离子体电压下沉积具有聚多巴胺物理和化学特性且不破坏多巴胺官能团的功能聚合物薄膜的可能性。高达3.0 kV的较高DBD电压会使沉积聚合物中相对于多巴胺的儿茶酚和胺等官能团（N/C比）减少，这是因为较高的电子能量会使多巴胺分解为原子和小分子。相反，高达1.5 kV的较低DBD电压由于电子能量较低而保持多巴胺的分子结构，从而增加了沉积聚合物中多巴胺的官能团和N/C比。因此，在较低DBD电压下沉积的聚合物表现出较低的接触角和较高的金属吸收性能，这些都是聚多巴胺的一些表面改性特性。当将使用低DBD电压的大气压等离子体与多巴胺溶液雾沉积的类聚多巴胺薄膜的金属吸收性能与其他用于铜、砷和铬的金属吸收剂进行比较时，类聚多巴胺薄膜表现出优异的金属吸收性能。据信，这种大气压等离子体工艺也可应用于其他单体的等离子体聚合，而不会破坏单体的官能团。
