Highly Stretchable Conductive Covalent Coacervate Gels for Electronic Skin.
Highly Stretchable Conductive Covalent Coacervate Gels for Electronic Skin.
复制标题
DOI：
10.1021/acs.biomac.1c01660
复制
发表时间：
2022-03-14
影响因子：
6.2
通讯作者：
Saunders, Brian R.
中科院分区：
文献类型：
--
作者：
Nguyen, Nam T.;Jennings, James;Milani, Amir H.;Martino, Chiara D. S.;Nguyen, Linh T. B.;Wu, Shanglin;Mokhtar, Muhamad Z.;Saunders, Jennifer M.;Gautrot, Julien E.;Armes, Steven P.;Saunders, Brian R.
近年来，高可拉伸导电水凝胶在应变和压力传感、电子皮肤和植入式生物电子器件等方面的应用得到了广泛的研究。在此，我们提出了一种新的交联复合凝聚方法来制备高拉伸和高压缩的导电水凝胶。凝胶涉及羧基化纳米凝胶和支链聚（乙烯亚胺）之间的复杂凝聚，其中后者由聚（乙二醇）二缩水甘油醚（PEGDGE）共价交联。石墨烯纳米片（Gnp）的内含物为水凝胶提供了导电性以及拉伸和压缩应变传感能力。我们证明，明智地选择PEGDGE交联剂的分子量可以调整这些水凝胶的机械性能。事实上，PEGDGE分子量为6000 g/mol的凝胶违背了韧性随强度增加而降低的一般规律。导电水凝胶的抗压强度可达25mpa，拉伸率可达1500%。这些新型凝胶既具有粘性又具有保形性。它们提供了一种自我修复的电子电路，对人体运动反应迅速，可以作为应变依赖的传感器，同时表现出低细胞毒性。我们的导电凝胶制备新方法是高效的，只涉及预制组件，并且是可扩展的。
Highly stretchable electrically conductive hydrogels have been extensively researched in recent years, especially for applications in strain and pressure sensing, electronic skin, and implantable bioelectronic devices. Herein, we present a new cross-linked complex coacervate approach to prepare conductive hydrogels that are both highly stretchable and compressive. The gels involve a complex coacervate between carboxylated nanogels and branched poly(ethylene imine), whereby the latter is covalently cross-linked by poly(ethylene glycol) diglycidyl ether (PEGDGE). Inclusion of graphene nanoplatelets (Gnp) provides electrical conductivity as well as tensile and compressive strain-sensing capability to the hydrogels. We demonstrate that judicious selection of the molecular weight of the PEGDGE cross-linker enables the mechanical properties of these hydrogels to be tuned. Indeed, the gels prepared with a PEGDGE molecular weight of 6000 g/mol defy the general rule that toughness decreases as strength increases. The conductive hydrogels achieve a compressive strength of 25 MPa and a stretchability of up to 1500%. These new gels are both adhesive and conformal. They provide a self-healable electronic circuit, respond rapidly to human motion, and can act as strain-dependent sensors while exhibiting low cytotoxicity. Our new approach to conductive gel preparation is efficient, involves only preformed components, and is scalable.
登录
查看更多内容
影响因子：
19
作者：
Ryplida, Benny;Lee, Kang Dae;Park, Sung Young
通讯作者：
Park, Sung Young
影响因子：
19
作者：
Kim, Yong Min;Moon, Hong Chul
通讯作者：
Moon, Hong Chul
碳纳米管/疏水缔合水凝胶作为超可拉伸、高灵敏度、稳定的应变和压力传感器
影响因子：
9.5
作者：
Qin, Zhihui;Sun, Xia;Li, Junjie
通讯作者：
Li, Junjie
影响因子：
56.9
作者：
Kim, Dae-Hyeong;Lu, Nanshu;Rogers, John A.
通讯作者：
Rogers, John A.
影响因子：
5.5
作者：
Hu, Jian;Kurokawa, Takayuki;Gong, Jian Ping
通讯作者：
Gong, Jian Ping