Weng, Chun-YunChun-YunWengVo, Trung HieuTrung HieuVoTsao, Heng-KwongHeng-KwongTsaoYU-JANE SHENG2025-08-282025-08-282025-1118761070https://www.scopus.com/record/display.uri?eid=2-s2.0-105012633021&origin=resultslisthttps://scholars.lib.ntu.edu.tw/handle/123456789/731675Background: In this work, physical granular eutectogels were fabricated by incorporating Carbopol microgels into a deep eutectic solvent (DES) without a polymer network. Methods: The DES consists of choline chloride as the hydrogen bond acceptor and citric acid as the hydrogen bond donor. Eutectogels with >5 wt% Carbopol concentration are capable of undergoing tensile and lap shear testing, demonstrate sticky surfaces, and exhibit ionic conductivity. Significant findings: As the Carbopol concentration increases, the tensile strength rises, but the adhesive strength and ionic conductivity decrease. Specifically, a eutectogel containing 10 wt% Carbopol showcases outstanding physical properties, including a tensile strength of 45.3 kPa, stretchability exceeding 1000 % strain, an adhesive strength of 4.66 kPa, and an ionic conductivity of 0.43 mS/cm. IR spectroscopy analysis reveals that DES acts as a physical crosslinker between microgels through multiple hydrogen bonds, facilitating the formation of granular eutectogels. Consequently, these eutectogels demonstrate self-healing and recyclability properties. Furthermore, they produce stable and consistent electrical resistance signals when subjected to repeated deformation, enabling their application in strain sensing.falseDESEutectogelMicrogelSelf-healingStrain sensingjournal article10.1016/j.jtice.2025.1063432-s2.0-105012633021