Magnetoactive liquid crystal elastomer nanocomposites
Magnetoactive liquid crystal elastomer nanocomposites
复制标题
DOI：
10.1039/b813120c
复制
发表时间：
2009-01-01
影响因子：
--
通讯作者：
Schmidt, Annette M.
中科院分区：
文献类型：
--
作者：
Kaiser, Andreas;Winkler, Moritz;Schmidt, Annette M.
我们提出了含有超顺磁性纳米颗粒的液晶弹性体(LCE)纳米复合材料，这些纳米颗粒在电磁场照射下执行局部散热。在弹性体的向列相-各向同性转变温度处，观察到快速的局部温升导致明显的收缩。这种材料表现出高达原始长度27%的收缩，响应时间短。我们找到了产热率和换热系数，这是决定最大收缩速率的参数。
We present liquid crystal elastomer (LCE) nanocomposites containing superparamagnetic nanoparticles that perform local heat dissipation upon irradiation with electromagnetic fields. A fast local temperature rise is observed that leads to a distinct contraction at the nematic-isotropic transition temperature of the elastomer. The materials exhibit contractions up to 27% of the original length with short response times. We found the heat production rate and the heat transfer coefficient the parameters that determine the maximum contraction rate.