CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chunlin Liu,Yukun Mao,Le Jiang,Qin Hu,Yingge Zhang,Fenglin Zhao,Enchong Zhang,Xiaodan Sun
Traditional information-transmission systems are poorly suited for rapid underwater communication because of their large size, high cost, and low flexibility, thereby inspiring the development of conductive hydrogel-based alternatives. However, the low extensibility and non-tissue-like flexibility of common hydrogels limit their applications in wearable devices for underwater use. As such, a self-healing double-network hydrogel with a large maximal strain (>1200 %), high conductivity (3.61 S m −1 ) and fatigue resistance, and tissue-like Young’s modulus (<20.4 kPa) was prepared by freeze–thaw and solvent-replacement methods using polyvinyl alcohol and sodium alginate as the raw materials. In addition, the suitability of the resulting self-healing hydrogel for land and underwater applications, including sensing, communication, and energy collection, was demonstrated. The developed material enabled the (i) effective monitoring of multiple human physiological activities on land and (ii) highly consistent real-time underwater information transmission based on the use of the international Morse code at reasonable water temperatures (0–25 °C) and frequencies (1–5 Hz). Thus, this study presents a strategy for the development of soft materials as components of intelligent underwater electronic devices.
研究领域:
材料科学
·
生物医学工程
·
软物质物理
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Yu Zhao,Qi-Yao Feng,Ya-Kun Xie,Zi-Li Zhang,Li-Juan Yin,Zhi-Min Dang
Dielectric elastomers (DEs) are widely studied as artificial muscles due to their large actuation strain and fast electromechanical response. Currently, the commonly used acrylate DEs require high prestretching and are subjected to a high actuation electric field to achieve excellent actuation performance. In this work, we prepared DEs with very simple prescriptions by UV curing method. The prepared DEs have very low mechanical losses (<4%) and high dielectric constants (≥5.67) and obtain a large actuation strain (30.2%) under a relatively low electric field (31.6 kV/mm) with non-prestretching. This is because the soft butyl acrylate (BA) can guarantee the DEs with low Young‘s modulus and increase the dielectric constant by its polar functional group (-COO-), besides controlling the content of the cross-linker urethane acrylate (TR-U201XS) to regulate the cross-link density of the DEs and further influence its electromechanical properties, which are positive for improving the DEs’ actuation performance. And the DEs can be used to fabricate a fishtail-type device, which obtains a large swing range of about 90° in air and can overcome the resistance of water to work in water.
研究领域:
材料科学
·
智能材料
✓ 已验证
DOI
高影响因子
Engineering Research Express
·
2023
·Vol. 5
·期 1
·015080
·
IF 1.7
Kunpeng Gao,Qianjin Wang,Junqi Tang,Yingkai Liu
Resistive-type strain sensors have been widely studied because of their high precision and convenient measurement. But the high sensitivity and large strain range of this kind of sensor conflict with each other. It is difficult to prepare a sensor with high sensitivity and a large tensile range at the same time. Here, we propose a method to use AgNWs/Ag microparticles (AgMPs) and PDMS to simultaneously manufacture two strain sensors with different principles, a crack-based sensor and a composite-based sensor. On the one hand, the crack-based sensor has a low detection limit of 0.5% strain and high sensitivity of GF ≈ 90 at the strain of 0 ∼ 50%. It is suitable for the detection of small strains and can detect throat vibration when speaking. On the other hand, the composite-based sensor has a large strain range of 0 ∼ 240% and excellent stability. After 1000 cycles of stretching-releasing at 50% strain, the resistance change rate remains unchanged. It is suitable for the detection of large strains. Moreover, the sensitivity and working range of the composite-based sensor can be adjusted by changing the ratio and total amount of AgNWs/AgMPs composites. It can accurately monitor the different bending angles of the elbow joint and a people's walking status and pace. The strain sensor prepared by this method has great practical value in wearable devices and electronic skin.
研究领域:
材料科学
·
生物医学工程
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 31
·e202402076
·
IF 1.9
Hengyi Cheng,Xun Zhang,Tao Zhang,Yixiang Chen,Dan Yu,Wei Wang
Graphical The figure shows the preparation process of TPU/PDA/MXene composite fibers. TPU fibers were first prepared by dissolving TPU particles in a certain amount of DMF solution, but since TPU fibers are inherently non-conductive, it was necessary to surface modify the TPU fibers. PDA was polymerized in situ on the fiber surface and then placed in MXene solution for ultrasonication to obtain composite fibers. With the development of the ageing society, wearable strain sensors have great application prospects in the fields of health detection, artificial intelligence, and motion recognition. However, traditional forms of film-like strain sensors suffer from low sensitivity, adhesion, and impermeability during use, which severely limit their practical applications. To overcome these problems, we propose a strategy to fabricate polyurethane/polydopamine/MXene (TPU/PDA/MXene) composite fibers by wet spinning. Furthermore, the outside is wrapped with (PDMS), giving mechanical strength and chemical resistance. Through a simple and low-cost wet spinning process, TPU/PDA/MXene fibers are achieved in the preparation of flexible strain sensors, and they can be woven into various forms with good flexibility and comfort according to practical needs. The results indicated that the prepared flexible strain sensor exhibits a high gauge factor (GF) of 57.15 over a large strain range (300 %), which are superior to those of many fiber-based sensors. Their application properties were also measured by attaching them to fingers, wrists and knees, showing high sensitivity, mechanical durability and chemical stability, and has great potential for wearable strain sensors and flexible strain sensors in complex environments.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
npj Flexible Electronics
·
2024
·Vol. 8
·期 1
·1-10
·
IF 12.3
Tang Lixue,Wang Huayi,Ren Jifeng,Jiang Xingyu
Stretchable electronic circuits can seamlessly conform to irregular and dynamic surfaces with high integration. However, current stretchable configurations typically have limited stretchability due to the lack of robust connections between soft interconnects and rigid electronics. Here, we printed highly stretchable metal–polymer conductors on thermoplastic elastomers as interconnects. We developed electronic vests with porous surfaces for rigid electronics and introduced polyester hot-melt adhesives to strengthen connections between soft interconnects and rigid electronics. After thermal bonding, the adhesive penetrates the porous surface of electronic vests, creating a mechanical interlock and providing an adhesion force of 8.34 N/cm for the connection (3× higher than conductive adhesives). Thus, rigid electronics of different sizes and different pin counts can form strong connections to soft interconnects, achieving a maximum strain tolerance of ~700% (10× higher than conductive adhesives). We achieved highly integrated ultra-stretchable displays that can withstand stretching up to 220% without dead pixels.
研究领域:
材料科学
·
电子工程
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhaoru Xue,Denghui Jiang,Yihang Li,Hongyu Yang,Linzhuang Xing,Zhimin Li
Lead-based piezoelectric ceramics hold a prominent share in commercial piezoelectric actuators, but their low strain has not been well resolved. Herein, a ternary piezoelectric ceramic x (Bi 0.25 Na 0.25 Ce 0.5 )(Zn 0.5 Ti 0.5 )O 3 -PbZrO 3 -PbTiO 3 ( x BNCZT-PZ-PT) was designed through the co-doping method at A and B sites, with the aim of enhancing the intrinsic response to strain characteristic. Results indicate that the incorporation of aliovalent cations facilitate the formation of the tetragonal phase by promoting lattice distortion which leads to the enhancement of tetragonality, thereby strengthening the piezoelectric response. Meanwhile, the defect dipoles are successfully created which establishes an internal bias field along the [001] direction, enhancing the stretching of the lattice under the electric field and contributing to the strain. When x = 0.04, the intrinsic response reaches a maximum, and a unipolar strain of 0.44 % is achieved at 60 kV/cm. The findings demonstrate the effectiveness to increase the strain in PZ-PT-based piezoelectric ceramics from the perspective of strain sources.
研究领域:
材料科学
·
陶瓷学
·
固态物理学
·
电陶瓷
·
功能材料
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Yu Zhao,Yan Wang,Zi-Li Zhang,San-Ni Zhao,Li-Juan Yin,Zhi-Min Dang
As a new type of electroactive material, the dielectric elastomer (DE) is widely used in applications such as actuators and sensors. However, since DEs typically have a low dielectric constant ( ε r ) and high stiffness, the dielectric elastomer actuator (DEA) requires a high driving field strength to achieve high performance. In this work, a new kind of DE with a molecular-level hybridized network structure (silicone rubber-polyurethane-acrylate) was designed to obtain high driving performance. The introduction of polar carbamate groups was intended to obtain a high ε r , and the formation of a linear polymer chain by modulating the ratio of hydroxyl to isocyanate groups resulted in an adjustable Young's modulus ( Y ). Finally, the prepared new DE-Acry-PU3 exhibited a maximum actuation strain of 28 % at a very low driving field strength of 15 kV/mm. In addition, Acry-PU3 has good driving durability and low loss, and the linear DEA based on Acry-PU3 can achieve a large displacement of 0.55 mm and a high output force of 92 mN/g at a low driving field strength of 15 kV/mm.
研究领域:
材料科学
·
高分子科学
·
机电驱动
·
智能材料
·
柔性机器人
✓ 已验证
产品关联
DOI
高影响因子
Science China-Materials
·
2023
·Vol. 66
·期 10
·4054-4061
·
IF 8.1
Teng Peicheng,Wang Zhao,Kang Yu,Zhang Yikai,Wang Shutao
Multilayer elastic printed circuit boards (E-PCBs) have emerged as advanced configurations for integrating electronic components on elastomer substrates. However, weak inter-layer adhesion in elastic substrates can result in deformation-induced cracks and delamination in real-world applications. In this study, we present a novel approach to address this challenge by developing supramolecular sandwiched elastomers with high-adhesion skin and mechanically strong cores. This is achieved by precisely regulating the coordination bonds between different metal ions and the ethylenediamine groups within the aminated polydimethylsiloxane. The resulting sandwiched elastomer exhibits strong adhesion between layers (adhesion strength of 0.80 MPa), breaking strength of 0.81 MPa, Young’s modulus of 0.49 MPa, and maximum strain exceeding 500%. Leveraging these properties, the multilayered configuration of E-PCBs can be efficiently and securely assembled using the designed sandwiched elastomers through a simple layer-mounting method. This study offers a promising avenue for the simple and effective fabrication of mechanically stable multilayer flexible devices, eliminating the need for additional adhesive layers and complex structural constructions.
研究领域:
材料科学
·
电子工程
·
高分子化学
✓ 已验证
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Xinke Zhong,Yihu Song,Qiang Zheng
Rubber nanocomposites exhibit strain softening under large-amplitude oscillation shear and large-strain cyclic tension while the mechanisms remain unresolved. Herein we systematically investigate the Payne effect and Mullins effect of unfilled and silica filled butadiene rubber (BR) vulcanizates to clarify the impacts of crosslinking density, sol fractions, and filler content. During large-amplitude oscillation shear, the critical strain amplitude for the onset of Payne effect is closely related to storage modulus in the linear viscoelastic region. During cyclic tension deformations, the recovery hysteresis energy and accumulating softening energy are involved in the local deformation of the rubber matrix, which is promoted by the filler phase. These findings are illuminative for optimizing performance of rubber nanocomposite products by controlling the nonideal network structure of viscoelastic rubber matrix.
研究领域:
材料科学
·
高分子科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）