Despite the current progress in multistimuli-responsive ionic conductive hydrogels, it is still a significant challenge to develop superior multistimuli-responsive ionic conductive hydrogels with satisfactory mechanical property, antibacterial and self-healing capability to meet the practical applications. In this study, a novel inherently antibacterial ionic conductive hydrogel (PCNAT-Fe) with excellent flexible, fatigue resistant, self-recovery ability, temperature/pH-responsive ability and tensile strain/temperature/pH-sensitive conductivity was fabricated via one step copolymerization of acrylic acid (AA) and -isopropylacrylamide (NIPAM) in the presence with carboxymethyl chitosan (CMCS), Tunicate cellulose nanocrystals (TCNCs) and FeCl. Benefiting from the synergy of TCNCs, FeCl and thermos/pH-sensitive materials, the hydrogel is concurrently endowed with excellent stretchability (1237.2 %), high conductivity (6.62S/m), biocompatibility, anti-drying capability, excellent mechanical and conductive repeatability. More importantly, the PCNAT-Fe hydrogel can ingeniously perceive large/subtle deformation (GF: 0.75 in the strain range of 0–50 %, 1.02 in the strain range of 50–150 %, response time 0.96 s and 2.81 in the strain range of 150–350 %, 3.40 in the strain range of 350–700 %), external temperature (TCR: −1.452 %/C in 25–37 °C, responsive time 3.3 s and −1.062 %/C in 37–75 °C) and pH values via the changes of relative resistance within fast responsive time, which can be applied as human–computer interfaces to interactively monitor human motions, ambient temperature and pH values in real time.

中文翻译：

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被囊类纤维素纳米晶增强导电多响应水凝胶具有超柔韧、抗疲劳和自修复能力，用于抗菌柔性传感器


尽管目前在多刺激响应离子导电水凝胶方面取得了进展，但开发具有令人满意的机械性能、抗菌和自修复能力的优质多刺激响应离子导电水凝胶以满足实际应用仍然是一个重大挑战。本研究通过一步共聚制备了一种新型固有抗菌离子导电水凝胶（PCNAT-Fe），该水凝胶具有优异的柔韧性、抗疲劳性、自恢复能力、温度/pH响应能力以及拉伸应变/温度/pH敏感电导率丙烯酸 (AA) 和异丙基丙烯酰胺 (NIPAM) 在羧甲基壳聚糖 (CMCS)、被囊类纤维素纳米晶体 (TCNC) 和 FeCl 存在下的反应。受益于TCNCs、FeCl和热/pH敏感材料的协同作用，水凝胶同时具有优异的拉伸性（1237.2%）、高电导率（6.62S/m）、生物相容性、抗干燥能力、优异的机械和导电重复性。更重要的是，PCNAT-Fe水凝胶可以巧妙地感知大/细微的变形（GF：在0-50%应变范围内为0.75，在50-150%应变范围内为1.02，响应时间为0.96秒，在应变范围内为2.81 150–350%，应变范围 350–700% 时为 3.40），外部温度（TCR：25–37°C 时为 -1.452%/C，响应时间为 3.3 秒，37–75° 时为 -1.062%/C） C) 和 pH 值，通过快速响应时间内相对电阻的变化来测量，可作为人机界面，实时交互式监测人体运动、环境温度和 pH 值。