Fu Dong, Xie Yang, Zhou Lili, Zhang Lili, Zheng Ting, Shen Jun
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China; Heilongjiang Academy of Sciences, Institute of Advanced Technology, Harbin 150029, PR China.
Heilongjiang Academy of Sciences, Institute of Advanced Technology, Harbin 150029, PR China.
Carbohydr Polym. 2024 Feb 1;325:121572. doi: 10.1016/j.carbpol.2023.121572. Epub 2023 Nov 11.
A novel triple physical cross-linking poly(ionic liquid) hydrogel, composed of poly(acrylamide-co-dodecyl methacrylate-co-1-vinyl-3-methyluracil-imidazolium chloride)/cellulose nanofibers-Ca (PADV/CNFs-Ca), was synthesized through micellar-copolymerization followed by a solvent-soaked procedure. The synergistic interactions in polymer network (i.e. the hydrophobic association of dodecyl methacrylate moiety in surfactant micelles, the hydrogen bondings between imidazolium monomer segments and other monomer segments in polymers, and the ionic coordination between Ca and -COO on cellulose nanofibers surface) endowed the hydrogel with excellent mechanical properties, including high strength (754 kPa of tensile strength and 1905 kPa of compressive strength), outstanding stretchability (1963 %), elastic modulus (56.5 kPa) and remarkable mechanical durability (200 cycles with 500 % deformations and 100 cycles at 50 % compression strain). Besides, this hydrogel exhibited other advantages, such as satisfied conductivity (28.7 mS/cm), high strain/pressure/temperature-sensitive behavior, precise and stable signal transmission, varying degrees of antibacterial activity, and biocompatibility. Owing to the exceptional comprehensive performance, the hydrogel was then assembled as a multifunctional sensor to monitor the joint motion, vocal cord vibration, tactile sensation and body temperature with remarkable sensitivity in real time. This work offered a new strategy for the fabrication of durable, biocompatible, antibacterial and conductive materials for wearable multifunctional electronic devices.
一种新型的三重物理交联聚（离子液体）水凝胶，由聚（丙烯酰胺 - 共 - 甲基丙烯酸十二酯 - 共 - 1 - 乙烯基 - 3 - 甲基尿嘧啶 - 咪唑氯化物）/纤维素纳米纤维 - 钙（PADV/CNFs - Ca）组成，通过胶束共聚然后溶剂浸泡法合成。聚合物网络中的协同相互作用（即表面活性剂胶束中甲基丙烯酸十二酯部分的疏水缔合、聚合物中咪唑单体片段与其他单体片段之间的氢键以及纤维素纳米纤维表面钙与 -COO 之间的离子配位）赋予水凝胶优异的机械性能，包括高强度（拉伸强度 754 kPa 和压缩强度 1905 kPa）、出色的拉伸性（1963%）、弹性模量（56.5 kPa）和显著的机械耐久性（500%变形下 200 次循环和 50%压缩应变下 100 次循环）。此外，这种水凝胶还表现出其他优点，如令人满意的导电性（28.7 mS/cm）、高应变/压力/温度敏感行为、精确稳定的信号传输、不同程度的抗菌活性和生物相容性。由于其卓越的综合性能，该水凝胶随后被组装成多功能传感器，能够实时以高灵敏度监测关节运动、声带振动、触觉和体温。这项工作为制造用于可穿戴多功能电子设备的耐用、生物相容、抗菌和导电材料提供了一种新策略。
