Hoffmann Frank, Wolff Thomas
Physikalische Chemie, Technische Universität Dresden, 01062 Dresden, Germany.
J Colloid Interface Sci. 2008 Jun 15;322(2):434-47. doi: 10.1016/j.jcis.2008.02.036. Epub 2008 Feb 29.
Polymer brushes consisting of hydrophilic and hydrophobic polymer components (poly-4-vinylpyridine, polymethacrylic acid and polystyrene, respectively) change their surface properties (as revealed by contact angles) when they are exposed to various solvents. In brushes prepared via grafting-from methods (using a specific surface initiator) layer thicknesses up to 300 nm were obtained. Copolymerization of the brush component monomers with 2-(4'-styryl)-indene yielded photo-cross-linkable brushes, which were used to fix the brushes in either the hydrophilic or hydrophobic state. Structural patterns differing in surface properties were produced and fixed by photo-cross-linking the hydrophobic component in that samples were irradiated through a mask. The patterns turned out most stable in moderately thick layers. AFM pictures confirm the contact angle results but reveal micro-domains of the two immiscible polymers in the grafted layers.
由亲水性和疏水性聚合物组分（分别为聚4-乙烯基吡啶、聚甲基丙烯酸和聚苯乙烯）组成的聚合物刷在暴露于各种溶剂时会改变其表面性质（通过接触角揭示）。在通过从特定表面引发剂进行接枝法制备的刷子中，获得了厚度达300纳米的层。刷子组分单体与2-(4'-苯乙烯基)-茚的共聚产生了可光交联的刷子，这些刷子被用于将刷子固定在亲水性或疏水性状态。通过对疏水性组分进行光交联产生并固定了表面性质不同的结构图案，即通过掩膜对样品进行辐照。这些图案在中等厚度的层中最为稳定。原子力显微镜图片证实了接触角结果，但揭示了接枝层中两种不相容聚合物的微区。
