NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 43
·20900-20908
·
IF 3.925
Jiawen Zheng,Yong Sun,Shuliang Yang,Zheng Li,Xing Tang,Xianhai Zeng,Lu Lin
Hydrogels have been considered one of the most promising materials for high-sensitivity sensors to instantaneously detect human physiological activities. However, fabricating a flexible hydrogel combining toughness, ionic conductivity, and anti-freezing capability is still a challenge. In this work, new interpenetrating polymer network (IPN)-structured hydrogels with stretchable, tough, and conductive properties were fabricated based on chemical cross-linked poly(acrylic acid) and physically cross-linked poly(vinyl alcohol). The introduction of cellulose nanocrystal (CNC) chains significantly enhanced the tensile strength and toughness. In particular, the introduction of the ethylene/water binary solvent maintained its original flexibility even after 24 hours of freezing at −20 °C. In addition, the developed hydrogel-based sensor was capable of differentiating accurately large and small movements of the human body, such as limb rotation, finger bending, and heartbeat.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Xue Jing,Wei Fu,Shan Xia,Guanghui Gao
Ionic conductive hydrogels have attracted extensive attention in the field of wearable sensing due to their excellent performance. However, most wearable sensors based on ionic conductive hydrogels focus on the detection of a single form of the human signal such as strain and pressure detection. To realize the comprehensive detection of human signals, the thermosensitive materials N-isopropylacrylamide (NIPAM) and acrylamide (AAm) were chemically cross-linked, and gelatin (GA) and tannic acid (TA) were introduced to construct a double-network structure hydrogel with tensile and temperature-sensing capabilities close to those of human skin. By adjusting the content of hydrophilic and hydrophobic segments of NIPAM and AAm in the first network of the hydrogel, the phase transition temperature could be controlled to realize real-time human temperature monitoring. The introduction of gelatin GA as the second network and TA as the hydrogen bond physical cross-linking center endow the hydrogel skin-like tensile strength (43 kPa) and toughness (33 kJ/m3) to adapt to the external strain changes in wearable sensing applications. Based on the skin-matching mechanical properties and good conductivity, the epidermal electrode assembled by the hydrogel had low interface impedance and excellent stability, which could be used for real-time collection of dynamic electrocardiogram (ECG) and electromyogram (EMG) physiological signals. It is believed that this hydrogel will provide new ideas for the design and manufacture of wearable devices for comprehensive health monitoring and telemedicine.
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
Materials
·
2025
·Vol. 18
·期 3
·664
·
IF 3.2
Zhuofang Huang,Anmin Li,Wendi Zhou,Jinjin Li,Jinkai Zhang
The effects of red mud on the microstructures and high-temperature tensile properties of the ZL109 aluminum alloy have been investigated. Red mud/ZL109-based composite materials with added red mud (a major byproduct of the aluminum industry), which has been coated with nickel by chemical deposition, have been prepared through gravity casting. The results show that the addition of red mud promotes the alloy’s microstructure and helps to uniformly distribute the eutectic silicon. It also increases the content of heat-resistant phases, such as the Q-Al5Cu2Mg8Si6and γ-Al7Cu4Ni phases. These changes significantly enhance the alloy’s high-temperature tensile properties. The alloy with 1% (wt.%) red mud exhibits the best tensile strength at both room temperature and 350 °C, reaching 295.4 MPa and 143.3 MPa, respectively. The alloy with 1.5% (wt.%) red mud demonstrates excellent performance at 400 °C, achieving a tensile strength of 86.2 MPa through the cut-through method and Orowan mechanism. As a reinforcing material, red mud not only improves the high-temperature resistance of the aluminum alloy but also provides a way to recycle industrial waste. This study offers a new way to address the red mud waste problem and helps develop high-performance, heat-resistant aluminum alloys. It shows the potential of these alloys in high-temperature applications.
研究领域:
材料科学
·
冶金工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Haidong Zhao,Xiangfei Xiao,Hao Xing,Xin Jia,Shuping Jin
Intelligent wearable strain sensors are indispensable for monitoring human locomotion and human–machine interactions. Herein, we present a nanocomposite ionogel film (thickness of 0.2 mm) prepared using polyvinylpyrrolidone (PVP), polyurethane (TPU), 1-butyl-3-methylimidazolium hexafluorophosphate, and black phosphorus (BP) in a dimethylformamide solution, referred to as BP@PVP/TPU, using the electrostatic spinning. While the ionogel film exhibited exceptional properties, including excellent self-adhesiveness, high tensile strength (1866 %), and high fracture strength (0.59 MPa), at room temperature, it displayed high tensile strength (940 %) and high fracture strength (3.01 MPa) even when stored at −35 °C for up to 15 days. Subsequently, a self-adhesive strain sensor was fabricated from the BP@PVP/TPU ionogel using copper wire. After 1000 pull-up cycles under 30 % strain, the sensing signal remained essentially unchanged, and the sensor exhibited satisfactory adhesion to different substrates (e.g., an impressive adhesion strength of up to 299 kPa to iron sheets). The excellent performance of the BP@PVP/TPU ionogel enabled the developed sensor to monitor various human body movements in real time. This approach is both economical and convenient and provides an innovative avenue for developing next-generation wearable strain sensors.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2025
·
IF 9.8
Zhaohui Lu,Wenxing Chen,Yinfu Luo,Lei Kong,Huawei Zou,Shengtai Zhou
Silicone rubber composites are widely used in the aerospace industry. However, ablation induced fracture limits their application under complex coupled mechanical-thermal-oxidative (MTO) conditions. In this study, 3D-knitted fabric was used to concurrently improve the tensile and ablative properties of silicone rubber composites. The 3D-knitted fabric was implemented in both 0° and 90° directions, and its efficacy in improving the ablative performance of corresponding composites was investigated. In addition, the tensile and ablative behavior of 3D-knitted fabric reinforced composites was studied using micro-CT and macroscale modeling strategy. The use of 3D-knitted fabric was found instrumental in enhancing the mechanical and ablative properties during ablation under the coupled MTO conditions. Moreover, the ablative performance was further improved by reducing defects through enhancing the interfacial interaction between carbon fiber fabric and the rubber matrix. To conclude, a facile and effective strategy was proposed to improve the ablative and tensile properties of silicone rubber composites under coupled MTO conditions, which exhibits potential application in the aerospace and fire protection sectors among others.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Zhouping Sun,Yong Dong,Wei Zhang,Yanyan Liu,Xingyou Tian,Hua Wang
While the enhancement of elastomer properties through nanofiller addition has been widely explored, developing high-performance elastomers for electrically insulating electromagnetic interference (EMI) shielding materials using a simple approach remains crucial. In this study, high-performance composite silicone rubber (SR) elastomers were fabricated through a combination of straightforward physical mixing and chemical grafting approach. Specifically, the incorporation of components aluminum trioxide nanoparticles (n-Al 2 O 3 ) and reactive small molecule 2-isocyanoethyl acrylate (ICA) and 2-Amino-4‑hydroxy-6-methylpyrimidine (UPY) into SR significantly improved both the mechanical strength and thermal resistance of the composites due to the synergistic effects of nanoparticles and hydrogen bonding. In addition, as flexible electronics become more complex and miniaturised, there is an increasing demand for stretchable electrically insulating EMI shielding materials. Liquid metal (LM) with extreme fluidity is ideal for the preparation of stretchable EMI shielding materials. By introducing LM, we prepared a stretchable electrically insulating EMI shielding material with a sandwich structure using a simple mechanical sintering and lamination process, and the EMI shielding properties of the material remained stable before and after stretching. The modified insulating layer has excellent elasticity and thermal stability, which ensures the normal use of the composite EMI shielding material under high temperatures and mechanical deformation conditions. This research provides valuable insights into the development of shielding materials with high-performance electrical insulation and strain-invariant EMI shielding behavior.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Fangya Qi,Yulu Tang,Chen Zhao,Zhaoqiang Zheng,Xiaoteng Jia,Yonggang Min
Two-dimensional transition-metal carbide (MXene) Ti3C2Tx possesses advantages of high conductivity and high volumetric capacitance, making it an ideal electrode material for high-performance supercapacitors. However, the high stiffness impedes its direct implementation in stretchable supercapacitors for integrated wearable electronics. Here, we demonstrate a stretchable supercapacitor based on Ti3C2Tx electrodes through a device-scaled controlled crumpling strategy. An ultrathin supercapacitor with a thickness of about 45 μm is assembled with gold foil gilded ultrathin preservative membrane as a current collector, drop cast Ti3C2Tx as an active material, and poly(vinyl alcohol)-H3PO4 as a polymer gel electrolyte. The ultrathin supercapacitor with optimized electrodes exhibits an areal specific capacitance of 10.2 mF cm–2 at 5 mV s–1 with excellent mechanical flexibility. The controlled adhesion of the ultrathin supercapacitor on a prestretched latex substrate and the elastic deformation of the substrate induce local displacements on the ultrathin supercapacitor to create periodic crumples. Stretching the crumpled supercapacitor only causes the amplitude and wavelength changes of the crumples, leading to a high level of stretchability (up to 100%). Also, the crumpled supercapacitor can sustain 1000 stretching cycles at a maximum strain of 100%. Moreover, it can provide sufficient power to drive α-In2Se3 nanoflake-based photodetector at 100% strain. This device-scaled controlled crumpling method provides a facile and effective way to design stretchable energy devices with high stretching durability for stretchable devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Jin Xu,Yanfei Chen,Yuanfang Tian,Zhaojie Yang,Zhixin Zhao,Wenhao Du,Xi Zhang
As a promising biodegradable resin, poly (butylene succinate) (PBS) is often blended with starch to reduce the cost. In this paper, 1-buyl-3-methylimidazolium halide pre-plasticized corn starch (CS) was blended with PBS to prepare PBS/corn starch blend material modified by ionic liquid (PBS/CS-IL). Ionic liquid (IL) acted as plasticizer and compatibilizer, and the effects of 1-butyl-3-methylimidazolium halide with different halogen anion on PBS/Starch blends were explored. The effects of IL on the structure and tensile property of PBS/Starch blends were evaluated by FTIR, SEM, DSC , TGA and XRD, respectively. Test results showed that the addition of IL significantly reduced the crystallinity of PBS/Starch blends, and the size of starch particles in the PBS matrix was also effectively reduced. IL also acted as a compatibilizer of starch and PBS, and induced the morphology of the blends to change from “sea-island” structure to homogeneous phase. The results of the tensile test showed that compared with the PBS/Starch blend without IL, the elongation at break of PBS/CS-IL increased from 22% to 93%. This study provided a simple and feasible method for the preparation of low-cost PBS bio-composite materials, and provided theoretical support for future industrial production.
研究领域:
材料科学
·
生物降解材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2024
·
IF 4.1
Jie Liu,Xiaoqian Guo,Rongyang Zhai,Peng Sun,Jianyun Ding,Zhaoyang Wei,Weiwei Lei,Dean Shi
Disulfide bond has unique advantages in the preparation of recyclable rubbers since it not only shows similar sulfur structure to the crosslinks of traditional sulfide rubber systems but also can rearrange and exchange itself under mild external conditions. However, the reported disulfide bond-crosslinked rubbers often exhibit weak tensile strength or poor elongation because of the inappropriate disulfide bond content. Although some disulfide bond incorporated dual-crosslinked rubbers can combine good tensile strength with high elongation, the dual-crosslinked design always requires multi-step chemical modification in the solvent, which is complex and difficult for industrial operation. In this work, aromatic disulfide bonds are introduced into epoxidized natural rubber (ENR) as the vulcanizing agent by a simple one-step method. It is found that the elongation of rubbers can be more than 1100 % with the tensile strength up to 7 MPa when 2.1 phr of 2,2′-dithiosalicylic acid is added. The quantitative relationship between the content of aromatic disulfide bonds and the mechanical properties of ENR is systematically studied, as well as the exchangeable behaviors of disulfide bonds. The research results of this work will not only provide a facile route for preparing rubbers with easily industrial operation and high stretchability, but also contribute to the in-depth understanding of the mechanism of disulfide bonds.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Xiaoxuan Pang,Yajiang Xian,Wei Wang,Pengcheng Zhang
Aluminum matrix Boron carbide composites is an important thermal neutron shielding material. In order to prepare 12 wt% B 4 C/6061Al composite with higher mechanical properties by powder metallurgy method, the new composite reinforced by Nano-Al 2 O 3 particles was fabricated by hot isostatic pressing in the semi-solid temperature range. The tensile properties and strengthening effects of the composite were investigated in this research. The tensile stress-strain curve of the composites was tested by material testing machine, and the microstructure and tensile fracture morphology of composites were analyzed by scanning electron microscopy (SEM) and transmission electron microscopes (TEM). The results indicated that the tensile strength of the composite was greatly improved by the addition of Nano-Al 2 O 3 , but the elongation decreased obviously. Nano-Al 2 O 3 particles had seriously affected the microstructure and fracture morphology of the composite and lead to the more obvious brittle fracture characteristics . Strengthening mechanisms of Nano-Al 2 O 3 particles reinforced 6061Al/B 4 C composite have been discussed, which reveals that grain boundary strengthening mainly plays the most important role.
研究领域:
材料科学
·
力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Fuping Li,Zhuoli Xu,Kang Zhao,Yufei Tang
ZrB 2 -ZrC composite nanofibers were fabricated by electrospinning and carbothermal reduction. The morphology, phase composition and interface were characterized. The fabricated ZrB 2 -ZrC composite nanofibers are uniform and the diameter is about 100 nm. The effects of heat-treatment temperature, n(B)/n(Zr) and n(C)/n(Zr) on the microstructure and phase composition of composite nanofibers were systematically investigated. The results shows heat-treatment temperature has influence on the phase composition and grain size of the ZrB 2 -ZrC composite nanofibers. The content of ZrC in the ZrB 2 -ZrC composite nanofibers can be adjusted by the value of n(B)/n(Zr) in the precursors. As n(B)/n(Zr) equal to 3.5, the mass ratio between ZrB 2 and ZrC is about 48:52 which is very close to the eutectic composition of ZrB 2 -ZrC composites. The value of n(C)/n(Zr) also affects the phase composition of composite nanofibers. Reaction process and phase evolution during heat-treatment were studied based on analysis of reaction thermodynamics. The value of n(B)/n(Zr) influences the phase evolution during fabrication of ZrB 2 -ZrC composite nanofibers. The tensile mechanical properties were tested, indicating that the addition of ZrC has the ability to improve the plasticity of ZrB 2 .
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2017
·
IF 2.124
Jianjun Li,Chujun Nie,Beibei Duan,Xu Zhao,Haibao Lu,Weilong Yin,Yibin Li,Xiaodong He
To understand the relationship between mechanical behavior and fiber assembly in electrospun ceramic-based fibrous mats, the tensile performance of silica , silica/polydimethylsiloxane and silica/polymethyl methacrylate hybrid fibrous mats was investigated. Elastic-plastic behavior as a whole was confirmed in the silica-based fibrous mats. The initial isotropy and disordered networks with point contact between the randomly oriented fibers before the tensile test and the highly oriented fibrous bundles with side contact between the aligned fibers after the tensile test were observed using scanning electron microscopy.
研究领域:
材料科学
·
力学
✓ 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）