蛋白质结晶介导的高性能可打印导电有机水凝胶的自强化,ACS Nano

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蛋白质结晶介导的高性能可打印导电有机水凝胶的自强化
ACS Nano ( IF 15.8 ) Pub Date : 2022-09-22 , DOI: 10.1021/acsnano.2c07823
Jupen Liu ₁ , Bo Zhang ₂ , Ping Zhang ₁ , Keqi Zhao ₃ , Zhe Lu ₁ , Hongqiu Wei ₁ , Zijian Zheng ₄ , Rusen Yang ₃ , You Yu ₁

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导电聚合物有许多先进的应用，但仍然有一个重要的目标是开发一种通用且直接的策略，以使用典型的导电聚合物，例如聚吡咯、聚苯胺或聚 (3,4-乙烯二氧噻吩）。在这里，我们报告了一种蛋白质结晶介导的自强化策略，结合合理的光化学设计来制造可打印的导电有机水凝胶。这种有机水凝胶是通过吡咯和明胶蛋白在几十秒内快速和正交可控的光聚合一步制备的。通过荫罩光刻和 3D 挤出技术，将制备好的导电有机水凝胶图案化并印刷成复杂的结构。温和的光催化体系使过渡金属碳化物/氮化物（MXene）组分在氧化制备过程和储存过程中具有高稳定性。控制水分蒸发可促进所制备的有机水凝胶中的明胶结晶，从而在不引入客体功能材料的情况下显着增强其在广泛温度范围内的机械性能和稳定性以及对连续摩擦处理的耐久性。此外，这些有机水凝胶具有商业电磁屏蔽、导热性能以及温度和光响应性。为了进一步证明这种简单策略和制备的有机水凝胶的优点，打印了棱镜阵列作为概念验证，并将其应用于制造可穿戴摩擦纳米发电机。

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Protein Crystallization-Mediated Self-Strengthening of High-Performance Printable Conducting Organohydrogels

Conductive polymers have many advanced applications, but there is still an important target in developing a general and straightforward strategy for printable, mechanically stable, and durable organohydrogels with typical conducting polymers of, for example, polypyrrole, polyaniline, or poly(3,4-ethylenedioxythiophene). Here we report a protein crystallization-mediated self-strengthening strategy to fabricate printable conducting organohydrogels with the combination of rational photochemistry design. Such organohydrogels are one-step prepared via rapidly and orthogonally controllable photopolymerizations of pyrroles and gelatin protein in tens of seconds. As-prepared conducting organohydrogels are patterned and printed to complicated structures via shadow-mask lithography and 3D extrusion technology. The mild photocatalytic system gives the transition metal carbide/nitride (MXene) component high stability during the oxidative preparation process and storage. Controlling water evaporation promotes gelatin crystallization in the as-prepared organohydrogels that significantly self-strengthens their mechanical property and stability in a broad temperature range and durability against continuous friction treatment without introducing guest functional materials. Also, these organohydrogels have commercially electromagnetic shielding, thermal conducting properties, and temperature- and light-responsibility. To further demonstrate the merits of this simple strategy and as-prepared organohydrogels, prism arrays, as proofs-of-concept, are printed and applied to make wearable triboelectric nanogenerators. This self-strengthening process and 3D-printability can greatly improve their voltage, charge, and current output performances compared to the undried and flat samples.

更新日期：2022-09-22

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