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Development of an elastomeric resin for digital light processing printing

Journal Article


Abstract


  • Soft pneumatic actuators are ideal for soft robotic applications due to their innate compliance and high power-weight ratios, but their design is limited by the lack of suitable stretchable materials. In this study, a new highly elastic resin for digital light projection 3D printers, designated ElastAMBER, is prepared from a di-functional polyether urethane acrylate oligomer, and a blend of two different diluent monomers. ElastAMBER exhibits a viscosity of 1000 mPa s at 40°C, outperforming previously synthesized elastic resins and allowing easy printing at near room temperatures. The 3D-printed components present an elastomeric behavior with a maximum extension ratio (λ) of 4.02 ± 0.06, ultimate tensile strength of 1.23 ± 0.09 MPa, low hysteresis, and negligible viscoelastic relaxation. Its application in linear soft pneumatic actuators has been demonstrated using a bellows-like construction. ElastAMBER shows promise for creating intrinsically capacitive sensing actuators, displaying a strong correlation between actuator displacement and capacitance. The developed 3D printable ElastAMBER can find potential applications in sensors and actuators for many soft robotic and human-machine interface applications.

Publication Date


  • 2022

Citation


  • Drury, R., Sencadas, V., & Alici, G. (2022). Development of an elastomeric resin for digital light processing printing. Journal of Applied Polymer Science, 139(19). doi:10.1002/app.52123

Scopus Eid


  • 2-s2.0-85122685672

Volume


  • 139

Issue


  • 19

Abstract


  • Soft pneumatic actuators are ideal for soft robotic applications due to their innate compliance and high power-weight ratios, but their design is limited by the lack of suitable stretchable materials. In this study, a new highly elastic resin for digital light projection 3D printers, designated ElastAMBER, is prepared from a di-functional polyether urethane acrylate oligomer, and a blend of two different diluent monomers. ElastAMBER exhibits a viscosity of 1000 mPa s at 40°C, outperforming previously synthesized elastic resins and allowing easy printing at near room temperatures. The 3D-printed components present an elastomeric behavior with a maximum extension ratio (λ) of 4.02 ± 0.06, ultimate tensile strength of 1.23 ± 0.09 MPa, low hysteresis, and negligible viscoelastic relaxation. Its application in linear soft pneumatic actuators has been demonstrated using a bellows-like construction. ElastAMBER shows promise for creating intrinsically capacitive sensing actuators, displaying a strong correlation between actuator displacement and capacitance. The developed 3D printable ElastAMBER can find potential applications in sensors and actuators for many soft robotic and human-machine interface applications.

Publication Date


  • 2022

Citation


  • Drury, R., Sencadas, V., & Alici, G. (2022). Development of an elastomeric resin for digital light processing printing. Journal of Applied Polymer Science, 139(19). doi:10.1002/app.52123

Scopus Eid


  • 2-s2.0-85122685672

Volume


  • 139

Issue


  • 19