Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 17
·6553-6558
·
IF 6.482
Jin-Cheng Shu,Si-Qi Zhu,Wen-Qiang Cao,Mao-Sheng Cao
A multi-functional electromagnetic (EM) device is an important pillar for promoting the progress of an intelligent society. Herein, a ZIF-67 nanoneedle array assembled on a nickel substrate is used as a precursor to construct a C/Co3O4 nanoarray via a simple thermal treatment approach, integrating the two functions of EM and thermal shielding. Its unique three-dimensional porous structure and integrated components endow this material with an average shielding efficiency of 99.62% and a maximum temperature difference of about 25 K. In addition, this skeleton structure features light weight, low density and small cost, which can be utilized to construct wearable devices to protect human beings from EM and thermal radiation. This study furnishes a novel horizon for the design and construction of multi-functional and wearable EM devices, and promotes the development of the EM field and the progress of multi-disciplinary technologies.
研究领域:
材料科学
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电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Yongji Yao,Liangmiao Zhang,Zhang Chen,Chuanxiang Cao,Yanfeng Gao,Hongjie Luo
A simple two-step route is developed to fabricate hexagonal Cs x WO 3 nanoparticles . The core of this route is the preparation of the precursor by drying the mixture of WO 3 sol and CsCl , which leads to a higher Cs/W (0.32) ratio at low temperature in a short time. During reaction, oleic acid, used as a solvent, can be adsorbed on the surface of Cs x WO 3 nanoparticles, which results in small particle size (20 nm × 10 nm) and mild agglomeration. In addition, oleic acid also plays a role as a reducing agent in forming Cs x WO 3 nanoparticles without any further post-treatment. Furthermore, the film prepared from as-synthesized Cs 0.32 WO 3 nanoparticles shows excellent NIR-shielding properties (approximately 99% of the near-infrared radiation is cut off over a wavelength range of 780–2600 nm and the visible-light transmittance at 465 nm is 78.9%) when covering on an ordinary sheet of glass. A model which simulates the real environment is applied to evaluate heat-shielding performance of the Cs 0.32 WO 3 film while comparing with that of ordinary glass and commercial ITO glass (10 Ω □ −1 ). Results revealed that the Cs 0.32 WO 3 film showed superior performance than others.
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
SYNTHETIC METALS
·
2024
·
IF 4
Mengjie Li,Wei Jiang,Yun Lin,Changhui Li,Xue Liu,Qiongzhen Liu,Wenwen Wang,Liyan Yang,Yuedan Wang,Dong Wang
Electrochromic fabric was formed by interfacial polymerization of polyaniline (PANI) and multi-walled carbon nanotubes (MWCNTs) on the surface of cotton cloth. The morphology and properties of the composite films were controlled by changing the content of multi-walled carbon nanotubes. The electrochromic properties of the fabric and its application in the field of near-infrared thermal shielding were studied. It is found that the electrochromic fabrics with MWCNTs have better electrochemical and color-changing properties. Electrochromic fabrics achieve color changes from light yellow to yellow-green to dark green in the voltage range of −1.0–1.2 V, and maintain a fast color switching time (2.15 s for coloring, 1.89 s for bleaching) after 600 cycles. The reflection contrast (ΔR) at 500 nm is 23.01 %. Moreover, the electrochromic devices are assembled with fabrics. The device has obvious discoloration and good bending stability. In addition, the thermal shielding is realized by using their reflection characteristics in the visual-near-infrared region. The results show that the electrochromic device has a low surface temperature at different environmental condition, and the thermal reduction from the original state to the bleached state is up to 3.8 ° C, indicating the potential application of the device in thermal regulation.
研究领域:
材料科学
·
电化学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2022
·
IF 6.206
Xin-Yi Ouyang,Wei Wu,Rui-Fang Wang,Qing-Shan Duan,Chong-Xing Huang,Yang Liu,Robert K.Y. Li,Hui Zhao
Infrared and heat shielding materials have a wide range of applications in military infrared invisibility and thermal insulation for energy saving, but mechanical damage during use may reduce the service life. In this study, waterborne polyurethanes/gallium tin oxide (WPU/GTO) composites with good infrared and thermal shielding capabilities were fabricated after the introduction of GTO nanoparticles into the thermal driven self-healing WPU matrix. The results showed that the WPU/GTO composite films can show good healing efficiency through thermally reversible DA reactions, with a self-healing efficiency of 80 % in 30 min at 120 °C. In addition, the presence of GTO gives the composite good thermal shielding properties without affecting its thermal stability. Due to free carrier absorption and plasma reflection, the resulting composite films containing 1 wt% GTO could shield from approximately 95 % of infrared light, with an insulation temperature difference of 15 °C when compared to pure polyurethane. This work provides a feasible solution for the preparation of infrared and heat shielding materials with self-healing capabilities.
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
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Bin Yang,Lin Wang,Junfan Zhao,Ruixue Pang,Baolong Yuan,Jiaojun Tan,Shunxi Song,Jingyi Nie,Meiyun Zhang
Pressure sensors with desirable flexibility, robustness, and versatility are urgently needed for complicated smart wearable devices. However, developing an ideal multifunctional flexible sensor is still challenging. In this work, a composite aerogel film sensor with an internal three-dimensional (3D) microporous and hierarchical structure is successfully fabricated by the self-assembly of aramid nanofiber (ANF) and conductive MXene by vacuum-assisted filtration and ice crystal growth. The resultant MXene/ANF aerogel film with a mass ratio of 3/7 (30% MAAF) presents high robustness with an outstanding tensile strength of 14.1 MPa and a modulus of 455 MPa while retaining appealing flexibility and sensitive characteristics due to the 3D microstructure. Accompanied by superior electric conductivity, the MAAF sensor performs noticeably in human motion and microexpression detection with a fast response time of 100 ms and a high sensitivity of 37.4 kPa–1. In addition, MAAF exhibits considerable thermal shielding performance based on the excellent thermostability. Moreover, it possesses prominent electrothermal property with a wide heating temperature range (32.7–242 °C) in a fast thermal response time (5 s) due to the Joule effect. Additionally, a hydrophobic SiO2 coating is introduced on the surface of MAAF to further broaden the sensing application, and the obtained MAAF@SiO2 sensor shows distinguished sensing capability underwater, which can be accurately applied to swimming monitoring. Therefore, this work provides a highly flexible, lightweight, robust, and multifunctional aerogel film sensor, showing promising potential in smart wearable sensing and healthcare devices, intelligent robots, and underwater detection.
研究领域:
材料科学
·
传感器技术
·
智能穿戴设备
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Ning Li,Xueyun Gao,Haikuan Fan,Yangqin Gao,Lei Ge
Effective and suitable utilization of solar energy was achieved using a full-spectrum-response photocatalyst AgBr/Cs x WO 3 , applied in the photocatalytic and photochromic field. Benefitting from near-infrared (NIR) absorption ability of Cs x WO 3 , AgBr/Cs x WO 3 exhibits enhanced visible-near-infrared (Vis-NIR) driven photocatalytic activity. Based on X-ray photoelectron spectroscopy (XPS), photoluminescence spectra (PL), and the photoelectrochemical analysis, AgBr and Cs x WO 3 formed a Z-scheme system at the interface to efficiently separate and transfer photo-induced electrons at a fast rate. The quenching experiment and the electron spin resonance (ESR) tests indicated that the photocatalytic reaction is activated by the production of superoxide radicals. Furthermore, the photochromic analysis to different light exhibits the AgBr/Cs x WO 3 heterostructure is stable under visible light with negligible photodeposition of AgBr, and has excellent double photochromic activity with visible-shielding effect of AgBr to Ag 0 and infrared-blocking effect of Cs x WO 3 under ultraviolet light. This research provides new insights into the manufacture of energy-efficient and environmentally friendly materials that provide excellent performance in both thermal insulation and decontamination.
研究领域:
材料科学
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物理化学
·
纳米催化
·
光化学
·
功能材料
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环境净化
·
能源材料
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Hua Su,Pengcheng Lin,Hao Lu,Xi Zhao,Xinxin Sheng,Ying Chen
Thermal comfort is of great significance to maintain people’s healthy state in physics, physiology, and psychology. Personal thermal management (PTM) that passively regulates the immediate environment around the human body has been proposed as a promising strategy to realize on-demand human thermal comfort. In this work, we propose a one-stop solution for the state of the art PTM by combining thermal shielding and thermal energy storage in a Janus-type wearable device, which is named a Janus-type hydroxyapatite-incorporated Kevlar aerogel@Kevlar aerogel supported phase-change material gel (HKA@KPG). The lower HKA with an ultralow thermal conductivity directly attached on the skin can effectively hinder heat transfer from the external environment to human skin. The upper KPG possessing a superior form stability and high energy storage capacity can absorb the heat generated by the human body to regulate the skin temperature. Both the HKA and KPG also demonstrate excellent biocompatibility. Due to its synergistic effect in thermal energy regulation, the Janus HKA@KPG has been applied in wearable PTM in static and dynamic modes to meet the thermal comfort requirements. It is anticipated that the one-stop thermal comfort solution for thermal shielding, thermal energy storage, self-supporting characteristics, wearability, and biosafety offers new possibilities for the next generation of wearable PTMs.
研究领域:
材料科学
·
热工程
·
纳米技术
·
生物医学工程
·
可穿戴技术
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Electronic Materials
·
2025
·
IF 4.7
Tianran Zhao,Fan Wu,Yi’na Yang,Liyang Zhao,Long Yu,Jiarong Zhang,Ya’nan Zhao,Chunna Yu,Chang Zhao,Guangjian Xing
The subpar mechanical and electrical properties of traditional conductive hydrogels limit their applicability in flexible pressure sensors for the stable and real-time monitoring of human activities. In this study, we synthesized a double-network poly(vinyl alcohol)/polyacrylamide/Ta4C3TX hydrogel using a one-pot polymerization method in the presence of CaCl2. This hydrogel benefits from the coexistence of metal coordination bonds, hydrogen bonds, and ionic interactions, contributing to its desirable mechanical properties and good compressibility. Furthermore, the incorporation of Ta4C3TX MXene significantly enhances the conductivity of the hydrogel compared to the pristine poly(vinyl alcohol)/polyacrylamide variant. The piezoresistive sensors constructed from this hydrogel demonstrate a high sensitivity of 2.67 kPa–1, a low detection limit of 38 Pa, a rapid response time of 69.1 ms, and a short-term recovery time of 39.75 ms, all while maintaining good stability. Notably, the sensors retain excellent sensing performance even after 90 days. Given these outstanding characteristics, the sensors hold promise for monitoring physiological signals, such as those from human limbs and speech, and can be utilized in the fields of detecting robotic movement and wireless wearable sensing. Additionally, the hydrogel demonstrates exceptional thermal shielding properties. This high-performance hydrogel developed in this study paves the way for advanced flexible wearable electronic devices.
研究领域:
材料科学
·
传感器技术
·
柔性电子学
·
生物医学工程
·
纳米技术
✓ 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）