Adhesive, stretchable and antibacterial hydrogel with external/self-power for flexible sensitive sensor used as human motion detection

Published on Sep 1, 2021in Composites Part B-engineering7.635
· DOI :10.1016/J.COMPOSITESB.2021.108984
Zixuan Zhou (Tongji University), Zhirui He (Tongji University)+ 2 AuthorsWeizhong Yuan29
Estimated H-index: 29
(Tongji University)
Abstract Conductive, flexible and stretchable hydrogel sensors have attracted a lot of interest in human-machine interfaces, medical monitoring, and soft robotics. However, there are still have great challenges in the preparation of conductive hydrogels with self-adhesive, self-power and antibacterial properties. In order to meet the requirements of high sensitivity, convenient carrying and anti-allergic, so as to overcome the problems of traditional sensors, such as non-stickiness, absolute dependence on external power supply and skin irritation, the prepared poly(vinylalcohol)/poly(acrylamide-co-[2-(methacryloyloxy) ethyl] dimethyl-(3-sulfo-propyl) ammonium hydroxide) (PVA/P(AM-co-SBMA), PPS) hydrogel was obtained by UV crosslinking and freeze-thaw cycles. The PPS hydrogel has good mechanical properties (the elongation was 700% and the breaking strength was 370 kPa), high adhesion to various substrates, antibacterial properties (~99%) and wide sensory sensitivity. And the self-power sensor can be achieved by using hydrogel as the conductive medium to assemble primary battery with zinc foil and copper foil, the open circuit voltage of this self-powered system can reach 0.86 V. Furthermore, the assembled strain sensor can also convert chemical energy into electrical energy, and transform the resistance changes caused by stretching or compression into voltage signals for output. It can be used as effective wearable power supply for human motion detection. This kind of self-adhesive and antibacterial self-powered strain sensor was expected to play a great role in flexible bioelectronics.
#1Shuxiang Bao (ZSTU: Zhejiang Sci-Tech University)H-Index: 2
#2Junting Gao (ZSTU: Zhejiang Sci-Tech University)H-Index: 1
Last. Wangyang Lu (ZSTU: Zhejiang Sci-Tech University)H-Index: 25
view all 6 authors...
Abstract Due to their excellent flexibility and high sensitivity, conductive hydrogel flexible sensors have got more and more attention in the wearable electronic devices field. However, for conductive hydrogel flexible sensors, the integration of conductive hydrogels key features (strength, stretchability, anti-freezing, antibacterial properties and large linear sensing range) is very necessary for their practical application. In this work, we creatively used soft 1D silk nanofibers (SNFs) and ...
1 CitationsSource
#1Long Biao Huang (SZU: Shenzhen University)H-Index: 2
#1Long-Biao Huang (SZU: Shenzhen University)H-Index: 20
Last. Jianhua Hao (PolyU: Hong Kong Polytechnic University)H-Index: 73
view all 10 authors...
Abstract Triboelectric nanogenerator (TENG), a promising energy harvesting technique, has attracted intense research interests in recent years for its applicability in portable and wearable electronics. Self-powered sensors with high sensitivity based on TENG have been widely reported. However, for practical applications, the survivability of TENG in harsh working environments is a vital issue which must be addressed. Herein, we report a hydrophobic, icephobic, and ultrafast self-healing TENG wi...
4 CitationsSource
Conductive elastomers (CEs) with strong mechanical properties have been fabricated and used in flexible electronics. However, the development of CEs with both super-high mechanical strength and extreme stretchability remains challenging. This paper reports on the development of a series of mechanically strong and tough CEs based on photopolymerizable deep eutectic solvents (PDESs) with dense hydrogen bonding interactions. One of these CEs exhibits the highest reported mechanical performance for ...
#1Huimin He (HKU: University of Hong Kong)H-Index: 1
#2Yanran Li (HKU: University of Hong Kong)H-Index: 1
Last. Lizhi Xu (HKU: University of Hong Kong)H-Index: 12
view all 6 authors...
Recent research on conductive hydrogels has revealed their potential for building advanced soft bioelectronic devices. Their mechanical flexibility, water content, and porosity approach those of biological tissues, providing a compliant interface between the human body and electronic hardware. Conductive hydrogels could be utilized in many soft tools such as neural electrodes, tactile interfaces, soft actuators, and other electroactive devices. However, most of the available conductive hydrogels...
#1Jin Xiaoqiang (ZJU: Zhejiang University)H-Index: 4
#2Jiang Huihong (ZJU: Zhejiang University)H-Index: 5
Last. Qiaoling Hu (ZJU: Zhejiang University)H-Index: 7
view all 7 authors...
2 CitationsSource
#1Huijun Li (NTU: Nanyang Technological University)H-Index: 6
#2Han Zheng (NTU: Nanyang Technological University)H-Index: 4
Last. Kun Zhou (NTU: Nanyang Technological University)H-Index: 61
view all 5 authors...
The weak mechanical properties of hydrogels due to the inefficient dissipation of energy in the intrinsic structures limit their practical applications. Here, a double-network (DN) hydrogel has been developed by integrating an ionically cross-linked agar network, a covalently cross-linked acrylic acid (AAC) network, and the dynamic and reversible ionically cross-linked coordination between the AAC chains and Fe3+ ions. The proposed model reveals the mechanisms of the improved mechanical performa...
2 CitationsSource
#1Xiaojin Zhang (China University of Geosciences)H-Index: 19
#2Kang Wang (China University of Geosciences)H-Index: 4
Last. Fan Xia (China University of Geosciences)H-Index: 3
view all 6 authors...
Calcium ions (Ca2+) are extremely important for efficiently improving the mechanical properties of alginate dual-crosslinked hydrogels through the synergy of crack bridging of covalent crosslinking and hysteresis of ionic crosslinking, but it is hard to achieve a high content of Ca2+ (>5 wt%) in these hydrogels for the following reasons. The low solubility and poor dispersion of CaSO4 in the gelling solution lead to a low Ca2+ content (<0.1 wt%). The rapid formation of an alginate–Ca2+ “egg-box”...
2 CitationsSource
#1Sanwei Hao (BFU: Beijing Forestry University)H-Index: 2
#2Changyou Shao (BFU: Beijing Forestry University)H-Index: 9
Last. Jun Yang (BFU: Beijing Forestry University)H-Index: 109
view all 6 authors...
The application of conductive hydrogels in intelligent biomimetic electronics is a hot topic in recent years, but it is still a great challenge to develop the conductive hydrogels through a rapid fabrication process at ambient temperature. In this work, a versatile poly(acrylamide) @cellulose nanocrystal/tannic acid-silver nanocomposite (NC) hydrogel integrated with excellent stretchability, repeatable self-adhesion, high strain sensitivity, and antibacterial property, was synthesized via radica...
3 CitationsSource
#1Guorong Gao (CAS: Chinese Academy of Sciences)H-Index: 18
#2Fangjian Yang (University of Electronic Science and Technology of China)H-Index: 1
Last. Zhong Lin Wang (CAS: Chinese Academy of Sciences)H-Index: 264
view all 10 authors...
There is an increasing interest to develop a next generation of touch pads that require stretchability and biocompatibility to allow their integration with a human body, and even to mimic the self-healing behavior with fast functionality recovery upon damage. However, most touch pads are developed based on stiff and brittle electrodes with the lack of the important nature of self-healing. Polyzwitterion-clay nanocomposite hydrogels as a soft, stretchable, and transparent ionic conductor with tra...
6 CitationsSource
#1Dawei Hua (NFU: Nanjing Forestry University)H-Index: 9
#2Shuting Gao (NFU: Nanjing Forestry University)H-Index: 6
Last. Chaobo Huang (NFU: Nanjing Forestry University)H-Index: 38
view all 5 authors...
Abstract Tough and conductive hydrogels are promising materials for various applications. However, it remains a great challenge to develop an integrated hydrogel combining outstanding mechanical, conductive, and self-healing performances. Herein, we prepared a conductive, self-healing, and tough hydrogel by constructing synergistic multiple interaction among montmorillonite (MMT), Poly (acrylamide-co-acrylonitrile) (P(AAm-co-AN)), xanthan gum (XG) and ferric ion (Fe3+). The obtained xanthan gum/...
5 CitationsSource
Cited By0