Highly Conductive, Stretchable, Adhesive, and Self‐Healing Polymer Hydrogels for Strain and Pressure Sensor,Macromolecular Materials and Engineering

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Highly Conductive, Stretchable, Adhesive, and Self‐Healing Polymer Hydrogels for Strain and Pressure Sensor
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-10-27 , DOI: 10.1002/mame.202000479
Chunying Yang ₁ , Jialin Yin ₁ , Zhuo Chen ₁ , Haishun Du ₂ , Minghua Tian ₁ , Miaomiao Zhang ₂ , Jinxin Zheng ₁ , Lan Ding ₁ , Pengfei Zhang ₁ , Xinyu Zhang ₂ , Kuilin Deng ₁

Affiliation

Retractable, self‐healing, and conductive hydrogels are widely used as adjustable and wearable sensing materials. Herein, using polyfunctional trypan blue (TB) as a crosslinking agent for both poly(acrylic acid) (PAA) and polypyrrole (PPy), a retractable and self‐healing PAA‐TB‐PPy hydrogel is prepared. The introduction of TB not only improves the water retention capacity of the hydrogel but also helps form a highly interconnected conductive path. It is found that PAA‐TB‐PPy hydrogel shows a high electrical conductivity (15 S m⁻¹) which is almost equivalent to the pure PPy hydrogel. Due to the high stability of the semi‐interpenetrating network structure, the elongation at break of PAA‐TB‐PPy hydrogel is more than 750%, along with high mechanical strength and strong adhesion to a variety of solid surfaces. In addition, the hydrogel exhibits high strain and pressure sensitivity with prominent linearity. Importantly, the as‐prepared hydrogel sensor can reliably detect both repetitive large strain and subtle vibration, which makes it a great candidate as wearable electronics for human motion monitoring.

中文翻译：

用于应变和压力传感器的高导电，可拉伸，粘性和自修复聚合物水凝胶

可伸缩，自修复和导电水凝胶被广泛用作可调节和可穿戴的传感材料。在此，使用多官能台盼蓝（TB）作为聚丙烯酸（PAA）和聚吡咯（PPy）的交联剂，制备了可伸缩且自愈的PAA-TB-PPy水凝胶。TB的引入不仅提高了水凝胶的保水能力，而且还有助于形成高度互连的导电路径。发现PAA‐TB‐PPy水凝胶显示出高电导率（15 S m ^-1）几乎等同于纯PPy水凝胶。由于半互穿网络结构的高度稳定性，PAA-TB-PPy水凝胶的断裂伸长率超过750％，同时还具有较高的机械强度和对各种固体表面的强粘合性。另外，水凝胶表现出高的应变和压力敏感性以及突出的线性。重要的是，所制备的水凝胶传感器可以可靠地检测出重复的大应变和微妙的振动，这使其成为人体运动监测的可穿戴电子设备的理想之选。

更新日期：2020-12-15

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