The influence of nanoparticle fillers on the morphology of a spin-cast thin film polymer blend
The influence of nanoparticle fillers on the morphology of a spin-cast thin film polymer blend
复制标题
纳米颗粒填料对旋涂薄膜聚合物共混物形态的影响
DOI：
10.1007/s00396-005-1406-2
复制
发表时间：
2006
影响因子：
2.4
通讯作者：
M. Liley
中科院分区：
文献类型：
--
作者：
C. Minelli;C. Frommen;C. Hinderling;R. Pugin;H. Heinzelmann;M. Liley
聚合物/纳米粒子复合薄膜由于其在超薄电子和光学器件中的潜在应用而受到越来越多的关注。聚合物共混物分层已被证明是一种合适的技术，用于聚合物薄膜的结构化和纳米粒子（NP）的图案化。在这项工作中，我们表明，薄的聚合物薄膜的形态通过旋转浇铸的聚合物共混物溶液中含有NP填料的表面上强烈依赖于NP填料的浓度。更具体地说，聚苯乙烯/聚甲基丙烯酸甲酯（PS/PMMA）薄膜形成的甲苯溶液，并分层以下的成核和生长机制，进行了研究。结果表明，随着CoPt：Cu纳米粒子浓度的增加，PMMA微畴的高度和面密度均增加。我们发现，类似的效果诱导在NP-自由PS/PMMA分层膜后，增加PS分子的分子量。这表明在某些条件下，共混物中的NP和聚合物分子不表现为单独的物质，而是形成聚集体。
Polymer/nanoparticle composite films are receiving growing attention thanks to their potential for application in ultra-thin electronic and optical devices. Polymer blend demixing has been shown to be a suitable technique for the structuring of polymer thin films and the patterning of nanoparticles (NP) within them. In this work we show that the morphology of thin polymer films made by spin-casting a polymer blend solution containing NP fillers on a surface depends strongly on the concentration of NP fillers. More specifically, polystyrene/polymethylmethacrylate (PS/PMMA) films formed from a toluene solution, and which demix following a nucleation and growth mechanism, were studied. It was found that both the height and the surface density of PMMA domains increased as the concentration of CoPt:Cu NPs in the film was increased. We find that similar effects are induced in a NP-free PS/PMMA demixed film upon increasing the molecular weight of the PS molecules. This suggests that under certain conditions the NPs and the polymer molecules in the blend do not behave as separate species but form aggregates.