Department of Chemical and Materials Engineering, Tamkang University, 151 Ying-chuan Road, Tamsui, Taipei 25137, Taiwan.
Nanotechnology. 2009 Nov 25;20(47):475606. doi: 10.1088/0957-4484/20/47/475606. Epub 2009 Oct 29.
We propose a new method for preparing polymeric nanocomposites and porous materials using self-assembled templates formed by 1,3:2,4-dibenzylidene sorbitol (DBS) organogels. DBS is capable of self-assembling into a 3D nanofibrillar network at relatively low concentrations in some organic solvents to produce organogels. In this study, we induced the formation of such physical cross-linked networks in styrene. Subsequently, we polymerized the styrene in the presence of chemical cross-linkers, divinyl benzene (DVB), with different amounts of DBS using thermal-initiated polymerization. The resulting materials were transparent, homogeneous polystyrene (PS) nanocomposites with both physical and chemical cross-links. The porous polymeric materials were obtained by solvent extraction of the DBS nanofibrils from the PS. Brunauer-Emmett-Teller (BET) measurements show that the amounts of DBS and DVB influenced the specific surface area after the removal of the DBS fibrils.
我们提出了一种使用 1,3:2,4-二苄叉山梨醇（DBS）有机凝胶形成的自组装模板来制备聚合物纳米复合材料和多孔材料的新方法。DBS 能够在某些有机溶剂中以相对较低的浓度自组装成 3D 纳米纤维网络，从而产生有机凝胶。在本研究中，我们在苯乙烯中诱导形成这种物理交联网络。随后，我们使用热引发聚合，在不同量的 DBS 存在下，用化学交联剂二乙烯基苯（DVB）聚合苯乙烯。得到的材料是透明的、均匀的聚苯乙烯（PS）纳米复合材料，具有物理和化学交联。通过从 PS 中萃取 DBS 纳米纤维，得到多孔聚合物材料。BET 测量表明，DBS 和 DVB 的量影响了去除 DBS 纤维后的比表面积。
