Design of Highly Conductive, Intrinsically Stretchable, and 3D Printable PEDOT:PSS Hydrogels via PSS-Chain Engineering for Bioelectronics
Design of Highly Conductive, Intrinsically Stretchable, and 3D Printable PEDOT:PSS Hydrogels via PSS-Chain Engineering for Bioelectronics
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DOI：
10.1021/acs.chemmater.3c00844
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发表时间：
2023-07
影响因子：
8.6
通讯作者：
Jiawen Yu;Fajuan Tian;Wen Wang;Rongtai Wan;Jie Cao;Cheng Chen;Dianbo Zhao;Jingcheng Liu;Jiang Zhong;Fucheng Wang;Qi Liu;Jingkun Xu;Baoyang Lu
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文献类型：
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作者：
Jiawen Yu;Fajuan Tian;Wen Wang;Rongtai Wan;Jie Cao;Cheng Chen;Dianbo Zhao;Jingcheng Liu;Jiang Zhong;Fucheng Wang;Qi Liu;Jingkun Xu;Baoyang Lu
聚（3，4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）基水凝胶由于其有趣的电学、力学和生物学性质而成为生物电子学的理想界面材料。然而，开发高性能PEDOT：PSS基水凝胶同时实现高导电性、稳健的机械性能和先进制造技术的可及性仍然是进一步推动此类材料走向实际应用的关键挑战。在此，我们开发了一种高导电性，本质上柔软，坚韧但可拉伸的PEDOT：PSS基水凝胶通过一个简单的PSS链工程策略，引入热交联的N-（羟甲基）丙烯酰胺片段。所得PEDOT：PSS水凝胶表现出高电导率（1850 S m-1）、高拉伸性（>50%）、低杨氏模量（4 MPa）和上级韧性（400 kJ m-3），满足实际生物电子应用的多种性能要求。基于这种材料，我们进一步开发了一种新型的PEDOT：PSS墨水，具有上级3D打印适性，可用于直接墨水书写3D打印，使我们能够通过多材料3D打印轻松制造生物电子设备，如与商业产品相当的柔软皮肤电极。
Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)-based hydrogels have emerged as ideal interfacing materials for bioelectronics because of their intriguing electrical, mechanical, and biological properties. However, the development of high-performance PEDOT:PSS-based hydrogels simultaneously achieving high conductivity, robust mechanical properties, and accessibility for advanced manufacturing technologies remains a critical challenge for further advancing such materials toward practical applications. Herein, we develop a highly conductive, intrinsically soft, tough yet stretchable PEDOT:PSS-based hydrogel via a simple PSS-chain engineering strategy of introducing thermally cross-linkableN-(hydroxymethyl)acrylamide segments. The resultant PEDOT:PSS hydrogel exhibits high electrical conductivity (1850 S m–1), high stretchability (>50%), low Young’s modulus (4 MPa), and superior toughness (400 kJ m–3), satisfying multiple property requirements for practical bioelectronic applications. Based on this material, we further develop a novel PEDOT:PSS ink with superior 3D printability for direct ink writing 3D printing, enabling us to facilely fabricate bioelectronic devices like soft skin electrodes comparable to commercial products via multi-material 3D printing.