With the development of various gel-based flexible sensors, novel gels with multiple integrated and efficient properties, particularly recyclability, have been developed. Herein, a starch-based ADM (amylopectin (AP)–poly(3-[dimethyl-[2-(2-methylprop-2- enoyloxy)ethyl]azaniumyl]propane-1-sulfonate) (PDMAPS)–MXene) gel is prepared by a facile “cooking” strategy accompanying the gelatinization of AP and polymerization reaction of zwitterionic monomers. Reversible crosslinking in the gel occurs through hydrogen bonding and electrostatic interactions. The ADM gel exhibits high stretchability (≈2700%, after one month), swift self-healing performance, self-adhesive properties, favorable freezing resistance, and satisfactory moisturizing properties (≥30 days). Interestingly, the ADM gel can be recycled and reused by a “kneading” method and “dissolution–dialysis” process, respectively. Furthermore, the ADM gel can be assembled as a strain sensor with a broad working strain range (≈800%) and quick response time (response time 211 ms and recovery time 253 ms, under 10% strain) to detect various macro- and micro-human-motions, even under harsh conditions such as pronunciation and handwriting. The ADM gel can also be used as a humidity sensor to investigate humidity and human respiratory status, suggesting its practical application in personal health management. This study provides a novel strategy for the preparation of high-performance recycled gels and flexible sensors.

中文翻译：

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具有多种功能的超高拉伸性和可回收淀粉基凝胶

随着各种基于凝胶的柔性传感器的发展，具有多种集成和高效特性（特别是可回收性）的新型凝胶已被开发出来。本文中，基于淀粉的 ADM（支链淀粉 (AP)–聚(3-[二甲基-[2-(2-甲基丙-2-烯酰氧基)乙基]氮杂基]丙烷-1-磺酸酯) (PDMAPS)–MXene) 凝胶是通过简单的“烹饪”策略，伴随AP的糊化和两性离子单体的聚合反应来制备。凝胶中的可逆交联通过氢键和静电相互作用发生。ADM凝胶具有高拉伸性（约2700%，1个月后）、快速自愈性能、自粘性能、良好的抗冻性和令人满意的保湿性能（≥30天）。有趣的是，ADM凝胶可以分别通过“捏合”方法和“溶解-透析”过程回收和再利用。此外，ADM凝胶可以组装成应变传感器，具有宽工作应变范围（约800％）和快速响应时间（10％应变下响应时间211毫秒和恢复时间253毫秒），以检测各种宏观和微观应变。 -人类动作，即使在发音和手写等恶劣条件下。ADM凝胶还可以用作湿度传感器来研究湿度和人体呼吸状态，表明其在个人健康管理中的实际应用。这项研究为制备高性能回收凝胶和柔性传感器提供了一种新策略。