当前位置: X-MOL 学术ACS Appl. Polym. Mater. › 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.)
Nanocomposite Grafted Stretchable and Conductive Ionic Hydrogels for Use as Soft Electrode in a Wearable Electrocardiogram Monitoring Device
ACS Applied Polymer Materials ( IF 5 ) Pub Date : 2020-01-03 , DOI: 10.1021/acsapm.9b00988
Subhankar Mandal , Anant Seth , Vikas Yadav , Srishti Kumari , Milan Kumar , Umaprasana Ojha

Hydrogels possessing stretchability, toughness, and conductivity together are promising candidates for soft electronics applications. In this report, ionic grafting of poly(acryloyl hydrazide) (PAHz)–silver (Ag) nanocomposites (NC) is used to improve the mechanical properties and conductivity of poly(acrylamidopropanesulfonic acid) (PAMPS) hydrogels. PAHz–Ag NCs possessing different sizes of Ag NPs (3–40 nm) are grafted in the PAMPS hydrogel matrix via −CONHNH3+---O3S ionic linkage. The resulting PAHz–Ag NC grafted hydrogels at ∼62 wt % water content exhibited ultimate tensile strength (UTS) and fracture energy up to ∼1.14 MPa and ∼1600 J/m2, respectively. The UTS of hydrogels was dependent on the size of Ag NP in PAHz–Ag NCs, and the value increased from 0.70 to 1.14 MPa with the decrease in Ag NP size from ∼40 to 5 nm. The hydrogel samples exhibited adequate skin adhesiveness (tack adhesive strength ≈10.8 kPa), conductivity (50.5 mS/cm), and strain sensing ability (gauge factor ≈0.9), suggesting these samples are potentially useful for various soft electronics applications. As a proof of concept, the hydrogels were employed as soft electrode in an electrocardiogram (ECG) device, and the efficiency was monitored under real-time conditions. The data exhibited noise-free reproducible patterns of ECG with defined P, Q, R, S, and T peaks under different locomotion of the body, suggesting the viability of developed hydrogels for the ECG sensing applications.

中文翻译:

纳米复合接枝的可拉伸和导电离子水凝胶,用作可穿戴心电图监测设备中的软电极

同时具有可拉伸性,韧性和导电性的水凝胶是软电子应用的有前途的候选者。在本报告中,聚丙烯酰肼(PAHz)-银(Ag)纳米复合材料(NC)的离子接枝用于改善聚(丙烯酰胺基丙烷磺酸)(PAMPS)水凝胶的机械性能和电导率。PAHz银NC的具有银纳米颗粒(3-40纳米)的不同尺寸的接枝在PAMPS水凝胶基质经由-CONHNH 3 + --- - Ö 3 š离子键。含水量约62 wt%的PAHz-Ag NC接枝水凝胶表现出极限拉伸强度(UTS)和断裂能,最高约1.14 MPa和约1600 J / m 2。, 分别。水凝胶的UTS取决于PAHz-Ag NCs中Ag NP的大小,该值从0.70 MPa增加到1.14 MPa,而Ag NP的大小从约40 nm减小到5 nm。水凝胶样品表现出足够的皮肤粘合性(粘性粘合强度≈10.8kPa),电导率(50.5 mS / cm)和应变感测能力(应变系数≈0.9),表明这些样品潜在地可用于各种软电子应用。作为概念的证明,将水凝胶用作心电图(ECG)设备中的软电极,并在实时条件下监测效率。数据显示出在不同运动状态下具有定义的P,Q,R,S和T峰的ECG的无噪声可重现模式,表明开发的水凝胶在ECG传感应用中的可行性。
更新日期:2020-01-04
down
wechat
bug