Block Copolymer Nanocomposites in Electric Fields: Kinetics of Alignment.
Block Copolymer Nanocomposites in Electric Fields: Kinetics of Alignment.
复制标题
DOI：
10.1021/mz3005132
复制
发表时间：
2013-01
影响因子：
5.8
通讯作者：
Clemens Liedel;Christian W. Pester;M. Ruppel;C. Lewin;Mariela J. Pavan;V. Urban;R. Shenhar;P. Bösecke;A. Böker
中科院分区：
文献类型：
--
作者：
Clemens Liedel;Christian W. Pester;M. Ruppel;C. Lewin;Mariela J. Pavan;V. Urban;R. Shenhar;P. Bösecke;A. Böker
利用原位小角X射线散射法研究了电场作用下嵌段共聚物/纳米粒子复合取向的动力学。以不同金纳米粒子含量的聚苯乙烯-嵌段-聚(2-乙烯基吡啶)嵌段共聚物为模型体系，在溶剂蒸气退火条件下，在厚膜中形成片层。虽然随着纳米颗粒含量的增加，排列情况会有所改善，但动力学过程会变慢。这可以用相分离度和粘度的变化来解释。我们的发现为纳米复合材料排列的基础提供了更广泛的见解。
We investigate the kinetics of block copolymer/nanoparticle composite alignment in an electric field using in situ transmission small-angle X-ray scattering. As a model system, we employ a lamellae forming polystyrene-block-poly(2-vinyl pyridine) block copolymer with different contents of gold nanoparticles in thick films under solvent vapor annealing. While the alignment improves with increasing nanoparticle fraction, the kinetics slows down. This is explained by changes in the degree of phase separation and viscosity. Our findings provide extended insights into the basics of nanocomposite alignment.