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In this work, styrene-ethylene-butylene-styrene (SEBS) rubber was used as the base material, and dodecyl benzene sulfonate anion (DBSA)-doped polyaniline (PANI) was used as filler to fabricate a hybrid composite conducting film. The maleic anhydride group of the SEBS Rubber and DBSA, the anion of the polyaniline dopant, make a very stable dispersion in Toluene and form a free-standing stretchable film by solution casting. DBSA-doped polyaniline increased the conductivity and dielectric constant of the dielectric film, resulting in a significant enhancement in the capacitance of the EAP-based strain sensor. The sensor presented in this article exhibits capacitance values ranging from 24.7 to 100 \u00b5F for strain levels ranging from 0 to 100%, and sensitivity was measured 3 at 100% strain level.<\/jats:p>","DOI":"10.3390\/s23239400","type":"journal-article","created":{"date-parts":[[2023,11,27]],"date-time":"2023-11-27T03:48:17Z","timestamp":1701056897000},"page":"9400","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Enhancement in Capacitance of Ionic Type of EAP-Based Strain Sensors"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6368-8437","authenticated-orcid":false,"given":"Nitin Kumar","family":"Singh","sequence":"first","affiliation":[{"name":"Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu Campus, Kitakyushu 808-0196, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3304-4443","authenticated-orcid":false,"given":"Kazuto","family":"Takashima","sequence":"additional","affiliation":[{"name":"Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu Campus, Kitakyushu 808-0196, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8102-1003","authenticated-orcid":false,"given":"Shyam S.","family":"Pandey","sequence":"additional","affiliation":[{"name":"Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu Campus, Kitakyushu 808-0196, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,11,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1145\/3311972","article-title":"Deformation capture via soft and stretchable sensor arrays","volume":"38","author":"Glauser","year":"2019","journal-title":"ACM Trans. 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