论文标题
弹性应力反向奥斯特瓦尔德成熟
Elastic stresses reverse Ostwald ripening
论文作者
论文摘要
当液滴在聚合物网络中成核并生长时，压缩应力可以显着增加其内部压力，达到远远超过拉普拉斯压力的值。当液滴在具有刚度梯度的聚合物网络中生长时，网络相对刚性区域的液滴倾向于溶解，有利于较软的区域中的液滴生长。在这里，我们表明这种弹性成熟可以足够强大以扭转奥斯特瓦尔德成熟的方向：大液滴可以收缩以喂养较小的液体的生长。为了对这些实验进行数字建模，我们将弹性成熟的理论推广，以说明溶解度与机械刚度的梯度以及梯度。
When liquid droplets nucleate and grow in a polymer network, compressive stresses can significantly increase their internal pressure, reaching values that far exceed the Laplace pressure. When droplets have grown in a polymer network with a stiffness gradient, droplets in relatively stiff regions of the network tend to dissolve, favoring growth of droplets in softer regions. Here, we show that this elastic ripening can be strong enough to reverse the direction of Ostwald ripening: large droplets can shrink to feed the growth of smaller ones. To numerically model these experiments, we generalize the theory of elastic ripening to account for gradients in solubility alongside gradients in mechanical stiffness.
