Dwivedi Sumant, Nag Aniruddha, Sakamoto Shigeki, Funahashi Yasuyoshi, Harimoto Toyohiro, Takada Kenji, Kaneko Tatsuo
Graduate School of Advanced Science and Technology, Energy and Environment Area, Japan Advanced Institute of Science and Technology 1-1 Asahidai Nomi Ishikawa 923 1292 Japan
School of Polymer Science and Engineering, The University of Southern Mississippi 118 College Drive #5050 Hattiesburg MS 39406 USA.
RSC Adv. 2020 Oct 15;10(62):38069-38074. doi: 10.1039/d0ra06620f. eCollection 2020 Oct 12.
High-performance water-soluble polymers have a wide range of applications from engineering materials to biomedical plastics. However, existing materials are either natural polymers that lack high thermostability or rigid synthetic polymers. Therefore, we design an amino acid-derived building block, 4,4'-diamino-α-truxillate dianion (4ATA), that induces water solubility in high-performance polymers. Polyimides containing 4ATA units are intrinsically water-soluble and are processed into films cast from an aqueous solution. The resulting polyimide films exhibit exceptional transparency and extremely high thermal stability. In addition, the films can be made insoluble in water by simple post-treatment using weak acid or multivalent metal ions such as calcium. The synthesized polyimide's derived from bio-based resources are useful for yielding waterborne polymeric high-performance applications.
高性能水溶性聚合物有着从工程材料到生物医学塑料等广泛的应用。然而，现有的材料要么是缺乏高热稳定性的天然聚合物，要么是刚性合成聚合物。因此，我们设计了一种氨基酸衍生的结构单元，4,4'-二氨基-α-吐昔酸二价阴离子（4ATA），它能使高性能聚合物具有水溶性。含有4ATA单元的聚酰亚胺本质上是水溶性的，并且可以加工成从水溶液中浇铸而成的薄膜。所得的聚酰亚胺薄膜具有出色的透明度和极高的热稳定性。此外，通过使用弱酸或多价金属离子（如钙）进行简单的后处理，这些薄膜可以变得不溶于水。源自生物基资源的合成聚酰亚胺可用于产生水性聚合物高性能应用。
