Lu Huiwan, Yang Dan
College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
College of New Materials and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
Polymers (Basel). 2022 Oct 8;14(19):4218. doi: 10.3390/polym14194218.
Dielectric elastomer actuators (DEAs), similar to artificial muscles, are widely applied in the fields of robotics and biomedical devices. In this work, 3-mercaptopropyl ethyoxyl di(tridecyl-pentaethoxy) silane (Si747)-modified BaTiO (BTO) nanoparticles (denoted as Si747@BTO) were utilized as dielectric filler to improve the dielectric constant while epoxy soybean oil (ESO) was employed as a plasticizer to decrease the elastic modulus, with the aim of improving the actuation performance of epoxy natural rubber (ENR) composites. The participation of Si747 in the vulcanization reaction of ENR led to the formation of covalent bonds between BTO and ENR chains, resulting in a uniform dispersion of BTO nanoparticles in the ENR matrix. Among obtained composites, the 50 phr ESO/Si747@BTO/ENR exhibited a relatively high actuated strain of 8.89% at 22 kV/mm, which is a value about 5.1-fold higher than that of pure ENR (1.45%) under the same electric field.
介电弹性体驱动器（DEAs）类似于人造肌肉，广泛应用于机器人技术和生物医学设备领域。在这项工作中，3-巯基丙基乙氧基二（十三烷基-五乙氧基）硅烷（Si747）改性的钛酸钡（BTO）纳米颗粒（表示为Si747@BTO）被用作介电填料以提高介电常数，而环氧大豆油（ESO）被用作增塑剂以降低弹性模量，目的是改善环氧天然橡胶（ENR）复合材料的驱动性能。Si747参与ENR的硫化反应导致BTO与ENR链之间形成共价键，从而使BTO纳米颗粒在ENR基体中均匀分散。在所制备的复合材料中，50 phr ESO/Si747@BTO/ENR在22 kV/mm下表现出相对较高的8.89%的驱动应变，该值比相同电场下纯ENR（1.45%）的值高约5.1倍。
