Highly compressible hydrogel sensors with synergistic long-lasting moisture, extreme temperature tolerance and strain-sensitivity properties,Materials Chemistry Frontiers

当前位置： X-MOL 学术 › Mater. Chem. Front. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Highly compressible hydrogel sensors with synergistic long-lasting moisture, extreme temperature tolerance and strain-sensitivity properties
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020-09-16 , DOI: 10.1039/d0qm00566e
Zhenzhen Liu _{1,

2,

3,

4,

5} , Jing Liu _{1,

2,

3,

4,

5} , Junmei Zhang _{1,

2,

3,

4,

5} , Bixia Zheng _{1,

2,

3,

4,

5} , Xinle Ren _{1,

2,

3,

4,

5} , Yanjun Long _{1,

2,

3,

4,

5} , Liming Fang _{5,

6,

7,

8,

9} , Rongxian Ou _{1,

2,

3,

4,

5} , Tao Liu _{1,

2,

3,

4,

5} , Qingwen Wang _{1,

2,

3,

4,

5}

Affiliation

With increasing interest and demand for wearable electronic skin sensors for human–machine interactions or personal health detection, fabricating a mechanically stiff, long-lasting moisture, high ionic conductivity, and extreme-temperature tolerant hydrogel electrolyte that maximally mimics the human skin is necessary, but remains a challenge. In this work, a dual-crosslinked hydrogel electrolyte was fabricated by simply immersing a photo-crosslinked polyvinyl alcohol (PVA-W) hydrogel into a tannic acid (TA)/NaCl/glycerin/H₂O solvent. The utilization of a glycerin/H₂O binary solvent not only significantly promotes the free diffusion of TA into the PVA-W hydrogel network, which could generate a high-mechanical-strength, homogeneous, and transparent hydrogel, but also effectively prevents the crystallization and evaporation of free water owing to the strong hydrogen bonding interactions. The constructed hydrogel electrolyte, named PT-GW, exhibits variable compressive stress from 0.37 to 9.85 MPa upon adjusting the TA concentration, and high compressibility and fatigue resistance over a wide temperature range from −20 to 60 °C, while retaining 90% of the original weight at 60 °C. The ionic conductivity of the PT100-GW hydrogel electrolyte retains a high value of 1.13 S m⁻¹ at 60 °C and 0.12 S m⁻¹ at −20 °C. Furthermore, this hydrogel sensor could precisely detect human joint motion and displays strain-dependence properties even in harsh environments. It is envisioned that this easily-prepared, low-cost and high-performance hydrogel electrolyte could a candidate for application in fields requiring multifunctional flexible electronic materials, such as biosensors, energy storage devices, and wearable devices.

中文翻译：

高度可压缩的水凝胶传感器，具有协同作用的持久水分，极高的温度耐受性和应变敏感性

随着人们对用于人机交互或个人健康检测的可穿戴电子皮肤传感器的兴趣和需求不断增长，有必要制造一种机械刚性强，持久的水分，高离子电导率和最大程度模仿人类皮肤的耐高温水凝胶电解质，但仍然是一个挑战。在这项工作中，通过将光交联的聚乙烯醇（PVA-W）水凝胶简单地浸入丹宁酸（TA）/ NaCl /甘油/ H ₂ O溶剂中，制造了双交联的水凝胶电解质。甘油/ H ₂的利用O二元溶剂不仅显着促进了TA到PVA-W水凝胶网络中的自由扩散，可以生成高机械强度，均匀且透明的水凝胶，还可以有效地防止游离水的结晶和蒸发。强烈的氢键相互作用。所构建的名为PT-GW的水凝胶电解质在调节TA浓度后表现出0.37至9.85 MPa的可变压应力，在-20至60°C的宽温度范围内具有高压缩性和抗疲劳性，同时保留了90％的60°C时的原始重量。PT100-GW水凝胶电解质的离子电导率在60°C时保持1.13 S m ^-1的高值，而在0.12 S m ^-1时保持高的值。在-20°C下。此外，即使在恶劣的环境下，这种水凝胶传感器也可以精确地检测人体关节运动并显示出应变依赖性。可以预见的是，这种易于制备的，低成本和高性能的水凝胶电解质可以候选用于需要多功能柔性电子材料的领域，例如生物传感器，能量存储设备和可穿戴设备。

更新日期：2020-09-30

点击分享查看原文

点击收藏

阅读更多本刊最新论文