Dielectric elastomer (DE) is a kind of electrically driven flexible intelligent polymer material, the middle is an elastomer, the two sides are coated with flexible electrodes, after the driving voltage is applied on both sides, under the action of Maxwell stress, the elastomer will become thinner, the volume will be extruded and deformed, and the electrical energy will be converted into the mechanical energy of the dielectric elastomer doing external work and the elastic potential energy of the elastomer deformation. The elastomer material is typically polyacrylate, and unmodified acrylates typically have a low dielectric constant, requiring a higher drive voltage. In this study, polyacrylate (CN 9021NS) was used as the research object, and ZnO nanoparticles were added to polyacrylate (CN 9021NS) to study the effect of nano-ZnO particles on the dielectric properties of composites, and the frequency dependence of dielectric constant and dielectric loss was analyzed. The results show that the addition of ZnO nanoparticles to polyacrylate can effectively increase the dielectric constant of the composites, but it will also lead to an increase in dielectric loss. When the nano-ZnO particle content is 10 wt%, although it will lead to an increase in dielectric loss, the dielectric constant is the highest, which is 13.9, which is 1.94 times that of the elastomer prepared by the original CN 9021NS. The dielectric loss reaches 0.103, which is 1.69 times that of the original CN 9021NS elastomer. Due to the small base of dielectric losses, the dielectric losses of both nanoparticles are relatively low.

Wenyi Liu, Tian He. Effect of adding different contents of nano-ZnO particles on the dielectric properties of polyacrylate composites. Academic Journal of Engineering and Technology Science (2024) Vol. 7, Issue 2: 150-156. https://doi.org/10.25236/AJETS.2024.070222.

[1] Alcaide J O, Pearson L, Rentschler M E. Design, modeling and control of a SMA-actuated biomimetic robot with novel functional skin [J]. 2017 IEEE International Conference on Robotics and Automation (ICRA), 2017, 12(11): 4338-45.

[2] Chen T, Bilal O R, Shea K, et al. Harnessing bistability for directional propulsion of soft, untethered robots [J]. Proceedings of the National Academy of Sciences, 2018, 115(22): 5698-702.

[3] Kodaira A, Asaka K, Horiuchi T, et al. IPMC Monolithic Thin Film Robots Fabricated Using a Multi-Layer Casting Process [J]. IEEE Robotics and Automation Letters, 2019, 4(11): 1335-42.

[4] Suzumori, Koichi. Flexible microactuator. (2nd Report, Dynamic characteristics of 3 DOF actuator) [J]. Transactions of the Japan Society of Mechanical Engineers, 1990, 56(527): 1887-93.

[5] Yuan C, Roach D J, Dunn C K, et al. 3D printed reversible shape changing soft actuators assisted by liquid crystal elastomers [J]. Soft Matter, 2017, 13(33): 5558-68.

[6] She Y, Chen J, Shi H, et al. Modeling and Validation of a Novel Bending Actuator for Soft Robotics Applications [J]. Soft robotics, 2016, 3(21): 71-81.

[7] H.F.Fei, Y.Yu, Z.J.Zhang. Research progress of silicone rubber dielectric elastomer [J]. Silicone material, 2023, 37(5): 12-9.

[8] Ning N, Ma Q, Liu S, et al. Tailoring Dielectric and Actuated Properties of Elastomer Composites by Bioinspired Poly(dopamine) Encapsulated Graphene Oxide [J]. Acs Applied Materials & Interfaces, 2015, 7(20): 22-8.

[9] Sun H, Jiang C, Ning N, et al. Homogeneous dielectric elastomers with dramatically improved actuated strain by grafting dipoles onto SBS using thiol–ene click chemistry [J]. Polymer Chemistry, 2016, 7(24): 4072-80.

[10] Tian M, Yan H, Sun H, et al. Largely Improved Electromechanical Properties of Thermoplastic Dielectric Elastomers By Grafting Carboxyl Onto SBS Through Thiol-Ene Click Chemistry [J]. Rsc Advances, 2016, 10(2):1039.

[11] Yang D, Zhang L, Ning N, et al. Large increase in actuated strain of HNBR dielectric elastomer by controlling molecular interaction and dielectric filler network [J]. Rsc Advances, 2013, 3(21): 31-3.

[12] Liu H, Zhang L, Yang D, et al. Mechanical, Dielectric, and Actuated Strain of Silicone Elastomer Filled with Various Types of TiO2 [J]. Soft Materials, 2013, 11(1-4): 363-70.

[13] T T Xu, Q Liu. Preparation and Properties of Modified TiO_(2)/ Silicone Rubber Dielectric Elastomer [J]. Polymer bulletin, 2022, 21(7): 21.

[14] Yamada T, Ueda T, Kitayama T. Piezoelectricity of a high‐content lead zirconate titanate/polymer composite [J]. Journal of Applied Physics, 1982, 53(12): 4328-32.

[15] Panda M, Srinivas V, Thakur A. Surface and interfacial effect of filler particle on electrical properties of polyvinyledene fluoride/nickel composites [J]. Applied Physics Letters, 2008, 93(1): (242908-9).

[16] Yang C, Lin Y, Nan C W. Modified carbon nanotube composites with high dielectric constant, low dielectric loss and large energy density [J]. Carbon, 2009, 47(4): 1096-101.

[17] Molberg M, Crespy D, Rupper P, et al. High Breakdown Field Dielectric Elastomer Actuators Using Encapsulated Polyaniline as High Dielectric Constant Filler [J]. Advanced Functional Materials, 2010, 20(19): 3280-91.

[18] X.S.Zhang, X.Y.Chen. Preparation of BZT 25 Nanopowders and Dielectric Properties of PVDF/BZT 25 Nanocomposites [J]. Experimental science and technology, 2021, 19(1): 12-6.

[19] C.Z.Gao, X.F.Dong, M.Qi. Electric field dependence of dynamic viscoelasticity of TiO _ 2/silicone rubber composite dielectric elastomer [J]. function materials, 2019, 50(7): 22-7.

[20] M.L.Wang, Y.Nan, J.Zhang, et al. Preparation and properties of graphene oxide core-shell hybrid particles/silicone rubber dielectric elastomer composites [J]. acta materiae compositae sinica, 2016, 33(6): 64-9.