Harris Rachel D, Auletta Jeffrey T, Motlagh S Amin Mohaghegh, Lawless Matthew J, Perri Nicholas M, Saxena Sunil, Weiland Lisa M, Waldeck David H, Clark William W, Meyer Tara Y
Department of Chemistry, ‡Department of Mechanical Engineering and Materials Science, and §Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States.
Department of Chemistry, Department of Mechanical Engineering and Materials Science, and §Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States.
ACS Macro Lett. 2013 Dec 17;2(12):1095-1099. doi: 10.1021/mz4004997. Epub 2013 Dec 3.
Inspiration for the design of new synthetic polymers can be found in the natural world, where materials often exhibit complex properties that change depending on external stimuli. A new synthetic electroplastic elastomer hydrogel (EPEH) that undergoes changes in mechanical properties in response to both chemical and electrochemical stimuli has been prepared based on these precedents. In addition to having the capability to switch between hard and soft states, the presence of both permanent covalent and dynamic copper-based cross links also allows this stimuli-responsive material to exhibit a striking shape memory capability. The density of temporary cross links and the mechanical properties are controlled by reversible switching between the +1 and +2 oxidation states.
新型合成聚合物的设计灵感可源于自然界，在自然界中，材料往往展现出随外部刺激而变化的复杂特性。基于这些先例，制备出了一种新型合成电塑性弹性体水凝胶（EPEH），它能响应化学和电化学刺激而发生机械性能变化。除了具备在硬态和软态之间切换的能力外，永久性共价交联和动态铜基交联的存在还使这种刺激响应材料展现出显著的形状记忆能力。临时交联的密度和机械性能通过 +1 和 +2 氧化态之间的可逆切换来控制。
