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However, the development of eutectogels with robust mechanical strength, high stretchability, excellent transparency, and desirable conductivity remains a challenge. Herein, a covalently cross-linked eutectogel was prepared by exploiting the high solubility of oligoethylene glycol in a polymerizable deep eutectic solvent (DES) form of acrylic acid (AA) and choline chloride (ChCl). The resulting eutectogel exhibited high transparency (90%), robust mechanical strength (up to 1.5 MPa), high stretchability (up to 962%), and desirable ionic conductivity (up to 1.22 mS\u2009cm\u22121). The resistive strain sensor fabricated from the eutectogel exhibits desirable linear sensitivity (GF: 1.66), wide response range (1\u2013200%), and reliable stability (over 1000 cycles), enabling accurate monitoring of human motions (fingers, wrists, and footsteps). We believe that our DES-based eutectogel has great potential for applications in wearable strain sensors with high sensitivity and reliability.<\/jats:p>","DOI":"10.3390\/polym16192761","type":"journal-article","created":{"date-parts":[[2024,9,30]],"date-time":"2024-09-30T04:57:28Z","timestamp":1727672248000},"page":"2761","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Highly Transparent, Mechanically Robust, and Conductive Eutectogel Based on Oligoethylene Glycol and Deep Eutectic Solvent for Reliable Human Motions Sensing"],"prefix":"10.3390","volume":"16","author":[{"given":"Zhenkai","family":"Huang","sequence":"first","affiliation":[{"name":"School of Materials and Energy, Foshan University, Foshan 528000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiahuan","family":"Xie","sequence":"additional","affiliation":[{"name":"School of Materials and Energy, Foshan University, Foshan 528000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tonggen","family":"Li","sequence":"additional","affiliation":[{"name":"School of Materials and Energy, Foshan University, Foshan 528000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3426-6208","authenticated-orcid":false,"given":"Liguo","family":"Xu","sequence":"additional","affiliation":[{"name":"College of Light Chemical Industry and Materials Engineering, Shunde Polytechnic, Foshan 528333, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peijiang","family":"Liu","sequence":"additional","affiliation":[{"name":"Reliability Physics and Application Technology of Electronic Component Key Laboratory, The 5th Electronics Research Institute of the Ministry of Industry and Information Technology, Guangzhou 510610, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianping","family":"Peng","sequence":"additional","affiliation":[{"name":"School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,9,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"984","DOI":"10.1126\/science.1240228","article-title":"Stretchable, Transparent, Ionic Conductors","volume":"341","author":"Keplinger","year":"2013","journal-title":"Science"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"4082","DOI":"10.1038\/s41467-021-24382-4","article-title":"Skin-like mechanoresponsive self-healing ionic elastomer from supramolecular zwitterionic network","volume":"12","author":"Zhang","year":"2021","journal-title":"Nat. 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