Department of Mechanical Engineering, Hanyang University, Seoul 133-791, Korea.
Macromol Rapid Commun. 2012 Aug 14;33(15):1256-61. doi: 10.1002/marc.201200073. Epub 2012 Apr 23.
A microfluidic technique was employed to fabricate polydiacetylene (PDA)-embedded hydrogel microfibers. By taking advantage of calcium ion-induced insoluble hydrogel formation, supramolecularly assembled diacetylene (DA)-surfactant complexes were successfully immobilized in the calcium alginate fibers. Thus, instantaneous microfiber formation was observed when the core flow of DA supramolecules-containing alginate solution met the sheath flow of calcium ions. UV irradiation of the resulting fibers afforded blue colored PDAs, and the formation of a conjugated polymer was confirmed by heat-induced phase transition and by Raman spectroscopy. By adjusting the core and sheath flow rates, PDA-embedded hydrogel fibers of various sizes were obtained.
采用微流控技术制备了嵌入聚二乙炔（PDA）的水凝胶微纤维。利用钙离子诱导的不溶性水凝胶形成，超分子组装的二乙炔（DA）-表面活性剂复合物成功地固定在海藻酸钠纤维中。因此，当含有 DA 超分子的海藻酸钠溶液的芯流与钙离子的鞘流相遇时，观察到瞬时微纤维形成。对所得纤维进行紫外线照射，得到蓝色的 PDAs，并通过热诱导相变和拉曼光谱证实了共轭聚合物的形成。通过调整芯流和鞘流速率，可以得到各种尺寸的嵌入 PDA 的水凝胶纤维。
