Li Jiefu, Wang Zhiliang, Wen Lingang, Nie Jing, Yang Shuguang, Xu Jian, Cheng Stephen Z D
Center for Advanced Low-dimension Materials, Donghua University, Shanghai 201620, China.
Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
ACS Macro Lett. 2016 Jul 19;5(7):814-818. doi: 10.1021/acsmacrolett.6b00346. Epub 2016 Jun 23.
In this letter, we put forward an approach to prepare hydrogen-bonded complex fibers. First, a spinnable fluid is obtained by restricting hydrogen bonds, and then it is extruded through a spinneret into a coagulation bath where hydrogen bonds are built to induce fiber formation. The hydrogen-bonded poly(acrylic acid)/poly(ethylene oxide) (PAA/PEO) complex was prepared into fibers. PAA/PEO fiber shows excellent elastic behavior and can be drawn to more than 12× its original length without breaking, which is much higher than Spandex fiber or natural rubber fiber. In the fiber, PAA and PEO are miscible in the molecular level. Dynamic hydrogen bonding between PAA and PEO restricts the crystallization of PEO, retains flexibility of polymer chains, and also provides recovery forces when removing stress.
在这封信中，我们提出了一种制备氢键复合纤维的方法。首先，通过限制氢键获得可纺流体，然后将其通过喷丝头挤出到凝固浴中，在凝固浴中形成氢键以诱导纤维形成。制备了氢键聚（丙烯酸）/聚（环氧乙烷）（PAA/PEO）复合纤维。PAA/PEO纤维表现出优异的弹性行为，可拉伸至其原始长度的12倍以上而不断裂，这远高于氨纶纤维或天然橡胶纤维。在纤维中，PAA和PEO在分子水平上互溶。PAA和PEO之间的动态氢键限制了PEO的结晶，保持了聚合物链的柔韧性，并且在去除应力时还提供恢复力。
