Yoshida Hiroaki, Yanagisawa Kazuhiro
Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan.
Polymers (Basel). 2018 Oct 31;10(11):1212. doi: 10.3390/polym10111212.
From the viewpoint of green chemistry and environmental chemistry, an important challenge in the field of superhydrophobic materials is to create them with only bio-based molecules. We developed superhydrophobic and chemically stable poly(L-phenylalanine) (PolyPhe) nonwovens by electrospinning. PolyPhe was selected because, due to its very rigid chemical structure, it is one of the toughest and most hydrophobic polymers among polymers composed only of amino acids. The water contact angle on the nonwovens is a maximum of 160°, and the droplets are stably adhered and remain still on the nonwoven surface even if it is turned over, thereby suggesting a petal-type superhydrophobicity. The nonwovens show a good chemical stability, and their weight remains unchanged after 5 days immersion in acidic (pH 2) and basic (pH 12) conditions. In addition, the superhydrophobic property is not lost even after the alkali treatment. Such tough superhydrophobic materials are intriguing for further biomedical and environmental applications.
从绿色化学和环境化学的角度来看，超疏水材料领域的一个重要挑战是仅用生物基分子来制备它们。我们通过静电纺丝制备了超疏水且化学稳定的聚（L-苯丙氨酸）（聚苯丙氨酸）无纺布。选择聚苯丙氨酸是因为，由于其非常刚性的化学结构，它是仅由氨基酸组成的聚合物中最坚韧且最疏水的聚合物之一。无纺布上的水接触角最大为160°，即使将其翻转，液滴也能稳定地附着并静止在无纺布表面，从而呈现出花瓣型超疏水性。该无纺布具有良好的化学稳定性，在酸性（pH 2）和碱性（pH 12）条件下浸泡5天后其重量保持不变。此外，即使经过碱处理，超疏水性能也不会丧失。这种坚韧的超疏水材料对于进一步的生物医学和环境应用具有吸引力。
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