FIBERS AND POLYMERS
·
2018
·Vol. 19
·期 11
·2344-2350
·
IF 1.353
Chen Zeqi,Wei Chengzhuo,Rao Weida,Fan Lingling,Xu Jie
An electrothermochromic fabric triggered by electric voltages was prepared by combining the electric heating feature of conductive polypyrrole (PPy) and the temperature-response color-changing feature of thermochromic inks. PPy was deposited selectively on the carbon-coated side of the sailcloth fabric via electrochemical polymerization. Thermochromic inks were painted on the reverse side with white color. The obtained fabric could be heated to about 48 °C and change its color significantly under an applied voltage of 3 V.
研究领域:
材料科学
·
纺织工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2022
·
IF 7.188
Qiaoqi Yu,Min Guo,Wanxuan Xu,Xiaodi Shi,Ying Ma,Jianyong Yu,Bin Ding
Smart windows for adaptive solar modulation have attracted considerable attention because of their broad prospects in energy-saving buildings. Herein, energy-saving smart windows are fabricated by the high-efficiency spray assembly of thermoplasmonic gold nanoparticles (Au NPs). First, the adsorption kinetics of the Au NPs in the spray assembly are investigated based on a pseudo-first-order kinetics equation, which exhibit a spray-pressure dependency. The amount of adsorbed Au NPs after spraying at 30 psi for 20 s is up to ∼80% the saturation adsorption amount, demonstrating the high-speed characteristic of the spray assembly. The spray-assembled Au NP coating, as a solar heating surface, is used to construct smart windows for adaptive solar modulation with the thermochromic poly(N-isopropylacrylamide) hydrogel. The obtained smart window shields 76.6% of the total solar irradiation in the range 300–2500 nm and allows 80.3% of the visible light to enter indoors before optical switching by the hydrogel ensures visual comfort. The cooling performance of the smart window is determined to be ∼13.9 °C by a model house test under a stimulated solar irradiation of 2.8 kW·m −2 (2.8 suns). Moreover, the fabrication method is suitable for flexible substrates to prepare bendable smart windows. This work provides a speed-up fabrication strategy for the large-scale manufacturing of energy-saving smart windows.
研究领域:
材料科学
·
能源工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiahui Tao,Shouqin Tian,Bin Li,Tingfeng Ma,Longxiao Zhou,Xiujian Zhao
Thermochromic hydrogel-based smart windows (SWs) have received wide attention due to their high solar energy modulation efficiency by switching transparent and opaque state in the visible region. However, SWs are opaque to visible light rather than near-infrared (NIR) light at high temperatures, and the very limited NIR modulation greatly limits their energy-saving effect and practicality. Herein, we propose a reversible photo-thermochromic hybrid smart window (SW) consisting of photochromic W 18 O 49 and thermochromic polyacrylamide-poly (N-isopropylacrylamide) (PAM-PNIPAM) hydrogel to address above issues. It enables graded and dual-band sunlight regulation. In the initial state, the SW is transparent to visible and NIR light with luminous transmittance ( T lum ) of 79.49 %. As solar irradiation increases, it gradually blocks near-infrared light and maintains T lum due to the ultraviolet (UV)-triggered photochromic effect of W 18 O 49 . The increase in indoor temperature is delayed. When the solar irradiation reaches the maximum, the increase in ambient temperature and the photothermal effect of colored W 18 O 49 trigger the thermochromism of the hydrogel, thus the full-band sunlight is blocked and the sunlight transmittance is 0 %. The SW can reduce indoor temperature by 8.5 °C. This work sheds light on saving energy by fully utilizing solar energy through muti-mode switching in hybrid SW.
研究领域:
材料科学
·
能源工程
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 42
·20015-20023
·
IF 6.97
Pan Wu,Xiuqing Shen,Christian G. Schäfer,Jian Pan,Jia Guo,Changchun Wang
Shape memory photonic crystals (SMPCs) combining the main characteristics of shape memory materials and photonic crystals have drawn increasing research interest. In sharp contrast to traditional responsive photonic crystals, the temporary shape of SMPCs can be “frozen” and photonic configurations can be modulated by temperature. However, the large-scale fabrication of SMPCs still remains a big challenge, making the practical application difficult. Herein novel scalable SMPC films with both mechanochromic and thermochromic properties are reported. Unlike traditional template-based methods resulting in only a small size, SMPC films are fabricated by a facile hot-pressing method and post-photocuring technology to give large-area freestanding polymer films. The films are mechanically robust and flexible, featuring an excellent structural color which can be changed upon stretching, similar to the color change process of chameleons in response to the environment. The blue-shift of the reflection peak up to 120 nm can be observed when the film is stretched. The films can be reversibly stretched and recovered in 25 cycles without obvious changes in reflection spectra. The temporary shape accompanied by tremendous color changes in the corresponding SMPC films after mechanical stress induced hot programming could be simply fixed by cooling the structure below the glass transition temperature of the polymer matrix. Incorporated programmed optical properties could afterwards be erased by temperature, and initial optical properties could be fully restored. Based on the fully reversible programmable shape as well as optical properties, the investigated SMPC films are expected to be promising candidates for various potential applications, such as smart monitoring, sensors, anti-counterfeiting, and displays.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Zixi Hu,Luyao Zhan,Yingying Zhang,Luping Sun,Xingchi Wang,Yongkun Liu,Haitao Ma,Mei Wang,Bin Ding,Ying Ma,Jianyong Yu
Electrochromic fibers adept at miniaturization and seamless integration with the soft and dynamically deformed human body, emerge as promising frontrunners in smart displays as a new form of wearable visual output devices. However, it remains a huge challenge to simultaneously achieve conformal smart fibers with various colors, desirable color-changing performance, reliable mechanical properties, and a simple preparation procedure for intelligent display of complex information during a human-machine interface. Herein, full-color electro-thermochromic fluorescent fibers with fast response (<1 s), off–on switching luminescence, good reversibility (>50 cycles), and programmable control, are developed on the basis of self-crystallinity phase changes and Förster resonance energy transfer; and performed self-adaptive intelligent display (≈2 s) of multi-targets in dynamic environments with the assistance of deep learning, by using a wearable textile display system as an example implementation. The work unifies deep learning and smart fibers to make it possible for bio-inspired self-adaptive ability, in which the dynamic targets encompass a diverse array of morphological entities, extending even to stimuli like light, scent, temperature, and humidity. This self-adaptive intelligent display fiber presents unprecedented opportunities for next-generation wearable electronics and systems, fostering seamless communication and adaptability within dynamic environments.
研究领域:
材料科学
·
人工智能
·
纺织工程
·
生物启发技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Minghan Duan,Xingchi Wang,Wanxuan Xu,Ying Ma,Jianyong Yu
Smart textiles with tunable luminescence have received special attention due to their great potential in various advanced photonic applications. Particularly, the development of one-dimensional, on-demand, responsive fluorescence fibers with excellent adaptability is of great significance. Herein, we propose electro-thermochromic fluorescence fibers regulated by a self-crystallinity phase change; that is, their tunable luminescence properties are derived from the reversible conversion of the dispersion state and fluorescence emission of fluorophore molecules during the crystallization/melting processes of phase-change materials. First results obtained with an alginate wet-spinning system demonstrate that the self-crystallinity phase change can produce polymeric fibers with thermochromic fluorescence behavior, which are prepared using microemulsion particles containing a phase-change fatty acid and coumarin fluorescent dyes. These thermochromic fluorescence fibers possess a fast response speed, high emission contrast, and good reversibility (>100 cycles). Particularly, the thermochromic fluorescent fibers can gain an electrotriggered capability by means of electric heating materials, and their great potential in precision operation applications is demonstrated. It is easy to adjust the switching point of the electro-thermochromic fluorescence fibers, highlighting their potential use in a diverse range of applications, the designs of which can be personalized. This work offers a simple yet versatile strategy for constructing electro-thermochromic fluorescence fibers for advanced smart textiles.
研究领域:
材料科学
·
纺织工程
·
光学材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）