Stimulated Transitions of Directed Nonequilibrium Self‐Assemblies
Stimulated Transitions of Directed Nonequilibrium Self‐Assemblies
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DOI：
10.1002/adma.201703495
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发表时间：
2017-10
影响因子：
29.4
通讯作者：
A. Steinschulte;A. Scotti;K. Rahimi;Oleksii Nevskyi;A. Oppermann;S. Schneider;Steffen Bochenek;M. F. Schulte;Karen Geisel;Felicitas Jansen;A. Jung;Sabrina Mallmann;R. Winter;W. Richtering;D. Wöll;R. Schweins;N. Warren;F. Plamper
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文献类型：
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作者：
A. Steinschulte;A. Scotti;K. Rahimi;Oleksii Nevskyi;A. Oppermann;S. Schneider;Steffen Bochenek;M. F. Schulte;Karen Geisel;Felicitas Jansen;A. Jung;Sabrina Mallmann;R. Winter;W. Richtering;D. Wöll;R. Schweins;N. Warren;F. Plamper
近平衡刺激响应聚合物已被广泛用于引入依赖于适应条件的形态变化。在恒定条件下的触发转换远没有得到很好的研究。这需要亚稳态的参与，亚稳态要么能够在偏离亚稳态后接近平衡态，要么可以在从非平衡态返回平衡态时冻结。这种功能性非平衡大分子系统对按需转化具有很大的希望，这导致其材料性质发生实质性变化，如触发凝胶化所见。在此，引入了由亲水性嵌段和对压力和温度均敏感的嵌段组成的二嵌段共聚物体系。该物种表现出各种胶束转变后离开平衡/非平衡状态，这是由温度偏转或流体静压的临时应用程序触发。
Near‐equilibrium stimulus‐responsive polymers have been used extensively to introduce morphological variations in dependence of adaptable conditions. Far‐less‐well studied are triggered transformations at constant conditions. These require the involvement of metastable states, which are either able to approach the equilibrium state after deviation from metastability or can be frozen on returning from nonequilibrium to equilibrium. Such functional nonequilibrium macromolecular systems hold great promise for on‐demand transformations, which result in substantial changes in their material properties, as seen for triggered gelations. Herein, a diblock copolymer system consisting of a hydrophilic block and a block that is responsive to both pressure and temperature, is introduced. This species demonstrates various micellar transformations upon leaving equilibrium/nonequilibrium states, which are triggered by a temperature deflection or a temporary application of hydrostatic pressure.