Arikawa Yuuya, Serizawa Takeshi, Mukose Takashi, Kimura Yoshiharu, Akashi Mitsuru
Department of Molecular Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita 565-0871, Japan.
J Nanosci Nanotechnol. 2006 Dec;6(12):3863-6. doi: 10.1166/jnn.2006.625.
Poly(lactide)s stereocomplex ultrathin film with controlled structure at a molecular level was able to be prepared by stepwise assembly using the stereocomplex interaction. Pure stereocomplex crystal can be easily obtained by using this technique. When the substrates pre-coated with the stereocomplex assembly were immersed into solution of poly(L-lactide) or poly(D-lactide) for a long time, each polymer was homogeneously deposited on the substrates. The enantiomer was epitaxially crystallized on the stereocomplex film. The XRD pattern of the films showed similar characteristic peaks of the stereocomplex, indicating that the crystallization was influenced by conformation of polymer at the substrate. This is the first case of the epitaxially growth of polymers on the structurally regulated surface. These films had high degree of crystallinity although the assemblies did not undergo a crystallization process. This method was considered to be a general method that can be applied to other polymers, which able to form stereocomplex.
通过利用立体复合相互作用的逐步组装，能够制备在分子水平上具有可控结构的聚丙交酯立体复合超薄膜。使用该技术可以轻松获得纯立体复合晶体。当将预涂有立体复合组装体的基材长时间浸入聚（L-丙交酯）或聚（D-丙交酯）溶液中时，每种聚合物都会均匀地沉积在基材上。对映体在立体复合膜上外延结晶。薄膜的X射线衍射图谱显示出与立体复合物相似的特征峰，表明结晶受到基材上聚合物构象的影响。这是聚合物在结构规整表面上外延生长的首例情况。尽管组装体未经历结晶过程，但这些薄膜具有高度的结晶度。该方法被认为是一种可应用于其他能够形成立体复合物的聚合物的通用方法。
