Waterproof and ultrasensitive paper-based wearable strain/pressure sensor from carbon black/multilayer graphene/carboxymethyl cellulose composite

Yun, Tongtong; Ji, Xingxiang; Tao, Yehan; Cheng, Yi; Lv, Yanna; Lu, Jie; Wang, Haisong

doi:10.1016/j.carbpol.2023.120898

Cited by 26 publications

(3 citation statements)

References 43 publications

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“…This actuator is capable of accurately detecting the different pressure signals when humans write different numbers The above actuators did not consider the water resistance of the sensors. Yun et al [125] developed a superhydrophobic and highly sensitive cellulose paper-based actuator (PB) that can quickly detect and perceive the bending of a finger. Impressively, the continuous dripping of water does not affect the sensing performance, which is advantageous for applications in wet or rainy conditions, as shown in Figure 16c.…”

Section: Flexible Electronic Equipmentmentioning

confidence: 99%

Cellulose-Based Intelligent Responsive Materials: A Review

Chang,

Weng,

Zhang

et al. 2023

Polymers

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Due to the rapid development of intelligent technology and the pursuit of green environmental protection, responsive materials with single response and actuation can no longer meet the requirements of modern technology for intelligence, diversification, and environmental friendliness. Therefore, intelligent responsive materials have received much attention. In recent years, with the development of new materials and technologies, cellulose materials have become increasingly used as responsive materials due to their advantages of sustainability and renewability. This review summarizes the relevant research on cellulose-based intelligent responsive materials in recent years. According to the stimuli responses, they are divided into temperature-, light-, electrical-, magnetic-, and humidity-responsive types. The response mechanism, application status, and development trend of cellulose-based intelligent responsive materials are summarized. Finally, the future perspectives on the preparation and applications of cellulose-based intelligent responsive materials are presented for future research directions.

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Section: Flexible Electronic Equipmentmentioning

confidence: 99%

Cellulose-Based Intelligent Responsive Materials: A Review

Chang,

Weng,

Zhang

et al. 2023

Polymers

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“…On the one hand, elastic materials, such as polydimethylsiloxane (PDMS) [35][36][37][38], silicon rubber (SR) [39,[40][41][42], polyurethane [43], and polyethylene [44], are selected to serve as the substrates of flexible force sensors in the past several years, largely improving the suppleness of the device, establishing conformal attachments to skins or object surfaces. On the other hand, nanomaterials with satisfying conductivity, including carbon black (CB) [44,45] and nanoparticles [46,47], carbon nanotubes (CNTs) [48][49][50], and nanowires (e.g. silver nanowires) [51], two-dimensional graphene and transition metal sulfide [52] come into our mind at the mere mention of conductive materials that utilized in flexible electrodes.…”

Section: Introductionmentioning

confidence: 99%

River valley-inspired, high-sensitivity, and rapid-response capacitive three-dimensional force tactile sensor based on U-shaped groove structure

Xu,

Hong,

et al. 2024

Smart Mater. Struct.

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High-performance three-dimensional force (3D-force) tactile sensors with the capability of distinguishing normal and tangential forces in sync play a vital role in emerging wearable devices and smart electronics. And there is an urgent need for 3D-force tactile sensors with fast response and high flexibility. Herein, we design a capacitive 3D-force tactile sensors inspired by the U-shaped river valley surface morphology, which has satisfactory performance in terms of rapid response/recovery time (∼36 ms/∼ 36 ms), low hysteresis (4.2%), and high sensitivity (0.487 N−1). A theoretical model of general value for congener sensors is also proposed, obtaining a higher sensitivity through optimizing parameters. To verify the application potential of our device in actual scenarios, the robustness testing and gripping gamepad application were carried out. And it can recognize different motions in humans. Furthermore, principal component analysis is also conducted to demonstrate the distinct classification of different motions. Therefore, our work is eligible for the applications in wearable electronics, human–machine interaction, and soft intelligent robots.

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“…In this regard, constructing a supramolecular structure is considered to be one of the important means to improve the mechanical properties of ionic hydrogels by properly introducing complex cross-linked networks, which can effectively broaden the strain detection range of hydrogel i-skin, and better identify the signals generated by large limb movements. , Carboxymethyl cellulose sodium (denoted as CMC-Na) is a natural polysaccharide derivative formed by the D-dehydrated glucose unit linked by β-(1–4)-glucoside bonds, which possesses abundant hydroxyl and carboxyl groups. These structural features enable CMC-Na to be used as the building unit to construct the supramolecular structure for effectively boosting the mechanical properties of hydrogels. − In addition, the introduction of functional polymer chains or components (e.g., adhesive and antifreeze) and various interactions (e.g., hydrogen bonds and ionic interactions) can further enhance the adhesion and tolerance of the ionic hydrogels under harsh environments. For instance, Lai et al prepared an antifreeze supramolecular ionic hydrogel by mixing poly(lipoic acid) with supramolecular cross-linkers of Fe 3+ and phytic acid (PA) .…”

Section: Introductionmentioning

confidence: 99%

Wireless Sensor System Based on Organohydrogel Ionic Skin for Physiological Activity Monitoring

Yang,

Ji,

Guo

et al. 2024

ACS Appl. Mater. Interfaces

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Supermolecular hydrogel ionic skin (i-skin) linked with smartphones has attracted widespread attention in physiological activity detection due to its good stability in complex scenarios. However, the low ionic conductivity, inferior mechanical properties, poor contact adhesion, and insufficient freeze resistance of most used hydrogels limit their practical application in flexible electronics. Herein, a novel multifunctional poly(vinyl alcohol)-based conductive organohydrogel (PCEL 5.0% ) with a supermolecular structure was constructed by innovatively employing sodium carboxymethyl cellulose (CMC-Na) as reinforcement material, ethylene glycol as antifreeze, and lithium chloride as a water retaining agent. Thanks to the synergistic effect of these components, the PCEL 5.0% organohydrogel shows excellent performance in terms of ionic conductivity (1.61 S m −1 ), mechanical properties (tensile strength of 70.38 kPa and elongation at break of 537.84%), interfacial adhesion (1.06 kPa to pig skin), frost resistance (−50.4 °C), water retention (67.1% at 22% relative humidity), and remoldability. The resultant PCEL 5.0% -based i-skin delivers satisfactory sensitivity (GF = 1.38) with fast response (348 ms) and high precision under different deformations and low temperature (−25 °C). Significantly, the wireless sensor system based on the PCEL 5.0% organohydrogel i-skin can transmit signals from physiological activities and sign language to a smartphone by Bluetooth technology and dynamically displays the status of these movements. The organohydrogel i-skin shows great potential in diverse fields of physiological activity detection, human−computer interaction, and rehabilitation medicine.

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Waterproof and ultrasensitive paper-based wearable strain/pressure sensor from carbon black/multilayer graphene/carboxymethyl cellulose composite

Cited by 26 publications

References 43 publications

Cellulose-Based Intelligent Responsive Materials: A Review

Cellulose-Based Intelligent Responsive Materials: A Review

River valley-inspired, high-sensitivity, and rapid-response capacitive three-dimensional force tactile sensor based on U-shaped groove structure

Wireless Sensor System Based on Organohydrogel Ionic Skin for Physiological Activity Monitoring

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