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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

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pp. 2493-2501
S&M2985 Research Paper of Special Issue

Actuator Membrane Comprising Natural Rubber Filled with Activated Carbon

Darika Jaaoh

(Received December 6, 2021; Accepted May 31, 2022)

Keywords: natural rubber, actuators, activated carbon, electrostriction

Natural rubber (NR) is an electrostrictive polymer that responds to electrical fields. The permittivity of NR may be increased by doping it with conductive particles. In this study, activated carbon was employed to increase the amount of free space charges and interphase charges between a rubber and a filler. Activated carbon was combined in the rubber phase in ratios of 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 parts per hundred rubber (phr). The morphology of the NR membranes with activated carbon was investigated. In addition, the mechanical, electrical, and electrical response properties were assessed. A proposed method was compared with the conventional method. The results demonstrated that the activated carbon particles blended into the NR by the proposed method were distributed homogeneously. When the amount of activated carbon was increased, the dielectric constant increased but the modulus decreased. The maximum electrostriction coefficient (M33) of the NR membrane with 3.0 phr activated carbon prepared by the proposed method was 3.51×10−15 m2/V2. This value was greater than that obtained by the conventional method and close to that of polyurethane, a synthetic polymer material commonly used in actuators.

Corresponding author: Darika Jaaoh




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