Manufacturing and post-engineering strategies of hydrogel actuators and sensors: From materials to interfaces

Zhao, Yiming; Cui, Jiuyu; Qiu, Xiaoyong; Yan, Yonggan; Zhang, Zekai; Fang, Kezhong; Yu, Yang; Zhang, Xiaolai; Huang, Jun

doi:10.1016/j.cis.2022.102749

Cited by 21 publications

(12 citation statements)

References 181 publications

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“…In addition, the rich functional groups of hydrogel cross‐linked network molecules bring convenience to the modification of hydrogels. [ 70 ] Moreover, the molecular cross‐linking action can solidify the water‐soluble substances, which in turn provides the possibility of hydrogel composite preparation. [ 71 ] It was found that the composite of hydrogel and MXenes can effectively enhance the stability of MXenes materials.…”

Section: Substrate Materials For Flexible Sensorsmentioning

confidence: 99%

MXene‐Based Flexible Sensors: Materials, Preparation, and Applications

Han

Yan

et al. 2023

Adv Materials Technologies

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The rational design and applications of MXene-based materials have yielded remarkable progress in flexible sensors, including wearable devices, soft robots, and smart medical equipment. The emerging MXene and substrate materials can be precisely engineered to improve the mechanical properties and sensing sensitivity of the sensors, opening up a wider range of application possibilities for MXene-based sensors. Therefore, a systematic and comprehensive review summarizing the progress of MXene-based sensor research based on these backgrounds is necessary. First, we discuss the basic structure of MXene materials and introduce the flexible substrate materials for MXene-based flexible sensors in detail. Then, we also discuss the different preparation methods of MXene-based sensors, describe the classifications, and highlight the applications of MXene-based flexible sensors in various scenarios. Finally, we identify the challenges that need to be overcome to accelerate the development of MXene-based materials in flexible sensing. This review provides a comprehensive and systematic insight into MXene-based flexible sensors and it is expected that this review will contribute to the development of higher performance MXene-based flexible sensors.

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Section: Substrate Materials For Flexible Sensorsmentioning

confidence: 99%

MXene‐Based Flexible Sensors: Materials, Preparation, and Applications

Han

Yan

et al. 2023

Adv Materials Technologies

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“…Hydrogels are three-dimensional polymer networks that have received great attention because of their high-water contents and good flexibility [ 1 ]. Composite hydrogels with tunable chemical and physical properties are excellent candidates for bio-medical research [ 2 , 3 ], oil production [ 4 ], adsorbents for removing hazardous pollutants [ 5 , 6 ] underwater adhesive [ 7 ], and other engineering applications [ 8 , 9 ]. Polyethyleneimine (PEI) is a positively charged polymer with a repetition of the ethyleneimine motif in the molecule structure [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Kneading-Dough-Inspired Quickly Dispersing of Hydrophobic Particles into Aqueous Solutions for Designing Functional Hydrogels

Huang

Wang

Liu

et al. 2023

Gels

Self Cite

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Hydrogels containing hydrophobic materials have attracted great attention for their potential applications in drug delivery and biosensors. This work presents a kneading-dough-inspired method for dispersing hydrophobic particles (HPs) into water. The kneading process can quickly mix HPs with polyethyleneimine (PEI) polymer solution to form “dough”, which facilitates the formation of stable suspensions in aqueous solutions. Combining with photo or thermal curing processes, one type of HPs incorporated PEI-polyacrylamide (PEI/PAM) composite hydrogel exhibiting good self-healing ability, tunable mechanical property is synthesized. The incorporating of HPs into the gel network results in the decrease in the swelling ratio, as well as the enhancement of the compressive modulus by more than five times. Moreover, the stable mechanism of polyethyleneimine-modified particles has been investigated using surface force apparatus, where the pure repulsion during approaching contributes to the good stability of the suspension. The stabilization time of the suspension is dependent on the molecular weight of PEI: the higher the molecular weight is, the better the stability of the suspension will be. Overall, this work demonstrates a useful strategy to introduce HPs into functional hydrogel networks. Future research can be focused on understanding the strengthening mechanism of HPs in the gel networks.

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“…Scaffaro et al [ 19 ] provided the most recent achievements in high-performance ionic tactile sensors applied to intelligent systems. Zhao et al [ 20 ] summarized post-treatment techniques and the development of appropriate electrical and mechanically durable interfaces of hydrogel sensors. Ying et al [ 11 ] reviewed cutting-edge skin-like hydrogel technologies for wearable electronics, soft robotics, and energy harvesting.…”

Section: Introductionmentioning

confidence: 99%

Recent Development of Self-Powered Tactile Sensors Based on Ionic Hydrogels

Zhao

Liu

et al. 2023

Gels

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Hydrogels are three-dimensional polymer networks with excellent flexibility. In recent years, ionic hydrogels have attracted extensive attention in the development of tactile sensors owing to their unique properties, such as ionic conductivity and mechanical properties. These features enable ionic hydrogel-based tactile sensors with exceptional performance in detecting human body movement and identifying external stimuli. Currently, there is a pressing demand for the development of self-powered tactile sensors that integrate ionic conductors and portable power sources into a single device for practical applications. In this paper, we introduce the basic properties of ionic hydrogels and highlight their application in self-powered sensors working in triboelectric, piezoionic, ionic diode, battery, and thermoelectric modes. We also summarize the current difficulty and prospect the future development of ionic hydrogel self-powered sensors.

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Manufacturing and post-engineering strategies of hydrogel actuators and sensors: From materials to interfaces

Cited by 21 publications

References 181 publications

MXene‐Based Flexible Sensors: Materials, Preparation, and Applications

MXene‐Based Flexible Sensors: Materials, Preparation, and Applications

Kneading-Dough-Inspired Quickly Dispersing of Hydrophobic Particles into Aqueous Solutions for Designing Functional Hydrogels

Recent Development of Self-Powered Tactile Sensors Based on Ionic Hydrogels

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