论文标题
活性脉冲凝胶：从化学微反应器到聚合物执行器
Active pulsatile gels: from chemical microreactor to polymeric actuator
论文作者
论文摘要
我们报告了活性脉冲Belousov-Zhabotinsky（BZ）水凝胶的合成方案，实验表征和理论建模。我们的两步合成技术允许独立优化BZ凝胶的几何形状和机械性能。我们确定了周围培养基化学和凝胶半径在通过Damkohler数量量化的BZ凝胶振荡中的作用，化学反应与扩散速率的比率。调整BZ凝胶尺寸以最大化其化学力学振荡振幅，我们发现其振荡性应变振幅受到相对于化学振荡期的凝胶肿胀时间限制的限制。我们的实验发现与BZ化学的货车 - ePstein模型和田中菲尔莫尔凝胶肿胀动力学理论非常吻合。
We report on a synthesis protocol, experimental characterization and theoretical modeling of active pulsatile Belousov-Zhabotinsky (BZ) hydrogels. Our two-step synthesis technique allows independent optimization of the geometry, the chemical, and the mechanical properties of BZ gels. We identify the role of the surrounding medium chemistry and gel radius for the occurrence of BZ gel oscillations, quantified by the Damkohler number, ratio of chemical reaction to diffusion rates. Tuning the BZ gel size to maximize its chemomechanical oscillation amplitude, we find that its oscillatory strain amplitude is limited by the timescale of gel swelling relative to the chemical oscillation period. Our experimental findings are in good agreement with a Vanag-Epstein model of BZ chemistry and a Tanaka Fillmore theory of gel swelling dynamics.
