Programmable, UV-printable dielectric elastomers actuate at low voltage without prestretch and supporting frames was written by Borayek, Ramadan;Zhang, Pengpeng;Willy, Habimana J.;Zedan, Mostafa;Zhu, Jian;Ding, Jun. And the article was included in ACS Applied Electronic Materials in 2020.Application In Synthesis of 2,5-Bis(5-(tert-butyl)benzo[d]oxazol-2-yl)thiophene This article mentions the following:
Dielec. elastomers are soft and perfect insulator polymers able to produce large strains with high energy d. under the effect of applied high voltage. However, their use in practical applications is hindered by the need for high voltage to actuate. Also, they need prestretching between rigid frames to produce out-of-plane shape changes, which may reduce their lifetime. Here, we synthesized a set of elastomers with high permittivity (from 20 to reach 60 at 103 Hz), controllable thermal properties (Tg vary from -15 to -50°), and good mech. properties (Young’s modulus values between 0.48 and 0.2 MPa at 20% strain). Due to the high permittivity, an actuator made of the material was able to respond to a low voltage of 700 V and produce a 6.5% area strain for more than 10,000 cycles. Moreover, the elastomers were found to produce giant free-end bending displacements with prespecified bending direction (bend to the side of the pos. electrode) under a low elec. field, which we called programmable dielec. elastomers (PDE). Besides the aforementioned characteristics and performance, the formulated elastomers are suitable for UV-based three-dimensional (3D) printing. The printability of the elastomers allows fabricating programmable complex geometries to produce high deformations under relatively low elec. fields. In the experiment, the researchers used many compounds, for example, 2,5-Bis(5-(tert-butyl)benzo[d]oxazol-2-yl)thiophene (cas: 7128-64-5Application In Synthesis of 2,5-Bis(5-(tert-butyl)benzo[d]oxazol-2-yl)thiophene).
2,5-Bis(5-(tert-butyl)benzo[d]oxazol-2-yl)thiophene (cas: 7128-64-5) belongs to benzothiophene derivatives. Benzothiophene is a fused ring compound of thiophene ring and benzene ring, which is an important class of heterocycles with advantageous structures. It is found within the chemical structures of pharmaceutical drugs such as raloxifene, zileuton, sertaconazole, and also BTCP.Application In Synthesis of 2,5-Bis(5-(tert-butyl)benzo[d]oxazol-2-yl)thiophene
Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem