作者:Chao Xing、Zhekun Shi、Jiliang Tian、Jing Sun、Zhibo Li
DOI:10.1021/acs.biomac.8b00240
日期:2018.6.11
Stimuli-responsive polymers have received increasing interest for a variety of applications. Here, we report a series of unique charge-determined thermoresponsive polypeptoids synthesized by a combination of ring-opening polymerization and click chemistry. The LCST-type and UCST-type behavior is mainly dominated by the charge state on the side chain. Further, the phase transition temperature highly depends on the degree of polymerization, the side-chain architecture, the pH value, and so on. The obtained polypeptoid solutions exhibit good stability against temperature and salt concentration. To our knowledge, this report presents the first charge-determined LCST/UCST-type polymer from identical homopolymer backbone that displays a wide range of tunable cloudy points in aqueous media. We propose the hydrogen-bonding interaction plays a critical part on the solution behavior. These features make polypeptoids ideal candidates for highly designable stimuli-responsive polymeric materials.
刺激响应型聚合物在各种应用领域受到越来越多的关注。在此,我们报告了一系列独特的电荷决定热响应性多肽,它们是通过开环聚合和点击化学结合合成的。LCST 型和 UCST 型行为主要由侧链上的电荷状态主导。此外,相变温度在很大程度上取决于聚合度、侧链结构和 pH 值等因素。所获得的多肽溶液对温度和盐浓度具有良好的稳定性。据我们所知,本报告首次提出了由电荷决定的 LCST/UCST 型聚合物,它们来自相同的均聚物骨架,在水介质中显示出广泛的可调浊点。我们认为氢键相互作用对溶液行为起着关键作用。这些特点使聚肽成为高度可设计的刺激响应型聚合物材料的理想候选材料。