Materials
·
2021
·Vol. 14
·期 6
·1406
·
IF 3.623
Chenglong Lv,Mei Zu,Dongjin Xie,Haifeng Cheng
The emulation of the reflectance of green leaf in the solar spectral band (300–2500 nm) has garnered increasing attention from researchers. Currently, various materials have been proposed and investigated as potential bionic leaves. However, the problems such as poor weather durability, heavy metal pollution, and complex preparation technology still persist. Herein, a bionic leaf is prepared from an ultramarine green pigment as the functional material, polyvinylidene fluoride (PVDF) as the film-forming material, and LiCl as the humidizer. To prepare the ultramarine green pigment, the sulfur anion is added into the β cage of the 4A zeolite. The mechanisms and properties were discussed based on X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, and spectroscopic methods. The results show that the as-fabricated bionic leaf based on the 4A zeolite-derived ultramarine green pigment was able to demonstrate a high spectral similarity coefficient of 0.91 with the green leaf. Furthermore, the spectral similarity coefficient was increased to 0.94 after being subjected to a simulated rainforest environment for 48 h, which indicated its high weather durability.Keywords:bionic leaf;green pigment;solar reflectance;4A zeolite;ultramarine green
研究领域:
材料科学
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光谱学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Junhua Chen,Guo Feng,Feng Jiang,Li Yin,Qianqian Zhao,Shanfang Lan,XiaoJun Zhang,Jianmin Liu,Qing Hu,Weihui Jiang
Novel Ni-doped Al 2 TiO 5 emerald green ceramic pigments were successfully synthesized for the first time. Several characterization techniques (XRD, XPS , SEM, TEM, UV–Vis, and automatic colorimeters) were used to determine the phase composition and stability of the pigments, as well as the valence state of the doped nickel ion . The results show that nickel ion replaces the Al 3+ in the aluminum titanate lattice in the form of Ni 2+ , which reduces the distortion of the octahedral structure. Ni-doping of the aluminum titanate lattice produces an excellent coloring effect and significantly promotes the synthesis and stabilization of aluminum titanate. The novel pigments have excellent color stability while maintaining exceptional coloring performance and thermal stability in a base glaze synthesized at 1200 °C. These pigments show considerable potential for high-temperature applications.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Junge Chen,Yang Yu,Aihu Feng,Le Mi,Huixin Xiu,Yun Yu
Thermal control coatings (TCCs) are an essential part of the thermal control systems in the spacecraft. Solar absorptance and emittance are the key performance parameters of TCCs. To develop an ultra-low solar absorption and stable inorganic TCCs for surface radiator, different TCCs were prepared by co-sintering ZnO and SiO 2 nanoparticles to form Zn 2 SiO 4 /SiO 2 pigment in this work, and the optical properties and radiation stability were systematically studied. It is found that the coating based on composite pigment has high reflectivity in the ultraviolet band and excellent optical performance possessing the low solar absorption of 0.06. In addition, the Zn 2 SiO 4 /SiO 2 coating demonstrates the highest proton and electron radiation stability because that SiO 2 between Zn 2 SiO 4 particles acts as the relaxation center of the defects caused by radiation.
研究领域:
材料科学
·
航天工程
✓ 已验证
产品关联
DOI
高影响因子
Inorganics
·
2023
·Vol. 11
·期 9
·368
·
IF 2.9
Weiran Zhang,Ziyu Li,Guohua Wu,Wei Wu,Hailan Zeng,Haiyun Jiang,Weili Zhang,Ruomei Wu,Qiong Xue
Cobalt blue ceramic pigments mainly consisting of CoAl2O4are subject to the difficulty of color control. Here, a perspective is reported regarding research on the reasons for color change based on the control of the heat treatment and ratio of components. Macroscopically, the composition of pigment powders determines the color. Microscopically, the crystallite characters including size, cation distribution, and structure have an important effect on the color. The ingredient, structural, and color properties of the pigment powders are analyzed using thermo gravimetry–differential scanning calorimetry (TG–DSC), X-ray diffraction (XRD) measurement, Rietveld refinement, energy dispersive spectrometer (EDS), and colorimetry analysis. The color is proven to be associated with cation distribution, such as that of Co2+and Co3+. It is indicated that high heating temperature, long heating time, and a large proportion of Al3+can, respectively, induce the Co2+and Al3+in tetrahedral and octahedral sites.Keywords:cobalt blue;ceramics pigment;CoAl2O4;cation distribution;coloration
研究领域:
材料科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2023
·Vol. 11
·期 5
·1403
·
IF 3.5
Min Luo,Peng Bo,Yang Shao,Zhiming Liu,Diandou Xu,Lingling Ma
Murals are one of the important cultural heritages of mankind. The microbial control of murals is an important subject in mural painting conservation. In recent years, electron beam radiation sterilization has attracted more and more attention in the field of cultural relic protection. Murals are immovable cultural relics, so conventional electron beam irradiation equipment can not be used. However, the development of small mobile electron beam irradiation equipment shows the potential of radiation’s application in the sterilization protection of immovable cultural relics such as murals. A feasibility study of radiation sterilization in mural paintings is needed to investigate the effect of sterilization and the influence of sterilization dose on the stability of mural painting pigments and bonding materials. In this paper, the radiation effects of typical bacteria in tomb murals and mineral pigment powder in ancient Chinese paintings were studied in a laboratory. Firstly,aeromonas hydrophila(Aer.h) andpenicillium flavigenum(PNC) were selected as representative strains to determine the appropriate sterilization dose for murals. Then, the effects of radiation on seven kinds of ancient Chinese mineral pigments and white calcium carbonate in the ground layer were verified. The results are as follows: the radiation dose of 10 kGy can effectively remove the two typical strains. This sterilization dose will cause a color difference in calcium carbonate and lead white, while other color pigments are essentially stable. Based on the color difference and UV-vis intensities of the four white carbonate samples, the color change in two of them increased with increasing the dose up to 30 kGy, after which signs of saturation began to appear. X-ray diffraction (XRD), Raman spectra, X-ray photoelectron spectroscopy (XPS) and X-ray absorption near edge structure (XANES) spectra showed that the chemical structure of the samples did not change after irradiation. The formation of free radicals in treated samples was confirmed using an electron paramagnetic resonance (EPR) spectrum test. According to all characterization results, the color difference between the four white carbonate samples may be due to the combination of unpaired electrons and defects in the process of electron beam irradiation to form color centers. After forming the color center, the light absorption of the four samples changed. This is a reversible change, but the samples will take a long time to return to their original state. This study focuses on the influence of electron beam radiation on pigment composition, which is a preliminary exploration of whether radiation sterilization can be applied to the protection of ancient Chinese mural paintings, and the experimental results can provide basic data for later application.Keywords:electron beam radiation;mural protection;radiation sterilization;mineral pigment;chromatic aberration
研究领域:
文化遗产保护
·
辐射生物学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Asian Ceramic Societies
·
2021
·
IF 3.125
Weiran Zhang,Jieqin Li,Fan Zhong,Guohua Wu,Haiyun Jiang,Weili Zhang,Qilong Liu
Cobalt blue pigments, which mainly comprise CoAl2O4, are widely synthesized as nano-scale particles using the coprecipitation method. Such ultrafine powders are necessary for the ceramics industry because of their significant effect on the color of glaze and bulk tiles. In this paper, cobalt blue pigments have been prepared using the coprecipitation method and then subjected to supercritical fluid drying. The differences in their physicochemical and optical properties are characterized using a series of analysis including X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy-dispersive spectrometer (EDS), and CIE-L*a*b*colorimetry analysis. The results indicate that the CoAl2O4 pigments subjected to supercritical fluid drying exhibit a fine-scale structure, a crystallite size of approximately 52 nm at 1400°C, and an excellent stability at high temperatures. They also present a vivid blue color, with improved brightness and hue than those of other cobalt blue pigments. Furthermore, this study elucidates the promising potential of supercritical fluid drying for fabricating nano-sized CoAl2O4 pigments with excellent optical and physicochemical properties.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 130
·期 1
·645-653
·
IF 1.395
Wenlong Qin,Gang Wu,Peipei Yin,Hongzheng Chen
RGB tricolor organic pigments were in situ modified by stearyl methacrylate-2-(dimethylamino)ethyl methacrylate-styrene random copolymer [P(SMA-DMA-St)] through solution polymerization. The modified particles were charged in tetrachloroethylene (TCE) with the aid of suitable charge control agent. The structure and electrophoretic property of ink particles were characterized by FTIR, TEM, PALS, et al. P(SMA-DMA-St) modification decreased the particles size and enhanced the suspending stability of the pigments in tetrachloroethylene due to the repulsive forces among the treated pigment particles resulting from the extending polyacrylate chain in the media. Partial crosslinking the P(SMA-DMA-St) on the pigment surface with ethylene glycol dimethacrylate (EGDMA) helped to increase the Zeta potential and electrophoresis mobility of RGB electrophoretic particles. The maximum values of the Zeta potential for red, green, and blue electrophoretic particles reached −36.2, −57.7, and −42.7 mV, respectively. The obtained RGB electrophoretic particles could be applied in the color/white dual-particle electronic ink together with charged TiO 2 to show vivid color and white images under a DC electric field. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Renhan Li,Qinglong Hu,Wenhao Xu,Denghao Li,Shiqing Xu,Gongxun Bai
As an environmentally functional material, zeolite solids can strongly adsorb and decompose harmful indoor gases, such as formaldehyde, to improve the home environment. Rare earth sulfide as a nontoxic and environmentally friendly pigment with good coloring performance is one of the promising choices to replace toxic cadmium- and lead-based pigments. In this work, multifunctional red γ-Ce2S3 pigments coated with microporous zeolite solids have been prepared by a hydrothermal method. The preparation process is safe and environmentally friendly. The fabricated composite solids not only absorb gas and water but also absorb water by microporous structures. The solids also show a stable red color, self-cleaning, and radiative cooling. Our results suggest that the multifunctional red cerium sulfide pigment-coated zeolite solids can be applied in color display, temperature and humidity control, and air purification.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2025
·
IF 2.7
Yuan Zhuang,Yanhui Liu,Shirong Wang,Xianggao Li,Shuxian Meng
Electrophoretic particles enable image display in electrophoretic displays by migrating under an electric field. In this study, white hollow TiO 2 was synthesized via an improved template method, and colored hollow particles were obtained through pigment adsorption. The TiO 2 exhibited a charge of +78.08 mV and 92 % reflectivity, making it suitable for electronic paper applications. Magenta, yellow, and cyan hollow particles, all negatively charged with non-overlapping charge values, were formulated into dual-color electrophoretic suspensions. Under alternating voltage, color changes were achieved in magenta/yellow and yellow/cyan systems. This study offers new insights for dual-color and multi-color electrophoretic displays.
研究领域:
材料科学
·
显示技术
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Xiaojing Mo,Xuxing Lu,Shuxue Yang,Yi Tan,Heyun Fu,Dongqiang Zhu,Xiaolei Qu
Plastics used in daily life are often colored for esthetic and functional purposes. Nevertheless, little is known about the photochemical activity of colored microplastics and the associated risks that are ubiquitous in the environment. In this study, we report the strong photochemical activity of microplastics colored with cadmium pigments. These colored microplastics can be excited by photons within the solar spectrum (<514 nm), readily generating •OH, O2•–, and H2O2. Consequently, they can effectively degrade 17β-estradiol, achieving >91% degradation within 23 h under simulated solar exposure. Among microplastics colored with different cadmium pigments, those with a cadmium pigment S/Se ratio of 2:5 exhibited the highest photoactivity. This is attributed to the narrow band gap, fast charge separation, and efficient charge transfer of the microplastics, as suggested by the energy band, photocurrent, and electrochemical impedance results. Meanwhile, hazardous Cd2+ was leached from colored microplastics mainly owing to the oxidation of pigment lattices by photogenerated holes. Our results reveal that microplastics colored with photoactive inorganic pigments behave drastically differently from uncolored counterparts. This highlights the importance of considering pigments as a critical factor for better assessing the environmental fate and risks of colored microplastics and plastic products.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Kai Lv,Xu Liang,Liangmiao Zhang,Zongtao Zhang,Yanfeng Gao
Solar thermal energy regulation is important for sustainable development, comfortable housing, and living. Black compounds are usually considered as an absorber of solar heat. This work reports a series of black near-infrared reflective pigments, Ca 2-y Mg y Mn(1) 1-x Mn(2) x O 4 (x = 0–1, y = 0–0.5), which show strong near-infrared (NIR) reflectivity. Comprehensive analyses were carried out to characterize the obtained pigments including X-ray diffraction, scanning electron microscopy, Raman spectroscopy, and UV–Vis–NIR spectrophotometry. Through the substitution of MnO 2 with Mn 2 O 3 , NIR solar reflectance of the black pigment can be enhanced by 13%, which might be mainly attributed to differences in particle size and lattice parameters. Meanwhile, through Mg doping, the obtained pigment Ca 1.8 Mg 0.2 MnO 4 shows excellent color performances (L* = 43, a* = 0.36, b* = −0.37) and NIR solar reflectance (R*, ∼60%). EnergyPlus simulation results show that for a warm city (Haikou), using the Ca 1.8 Mg 0.2 MnO 4 coating (L* = 25, R* = 51%) can reduce annual cooling energy consumption by 21%.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2016
·
IF 5.154
Yuhang He,Houbin Li,Liguo Ou,Fuyuan Ding,Zhan Zhan,Yuye Zhong
In order to improve the corrosion resistance and dispersiveness of aluminium pigments in aqueous media, SiO 2 -coated aluminium was prepared and polyacrylic acid brushes were grafted on its surface. A decrease in hydrogen generation indicated that the corrosion resistance was improved by the SiO 2 coating, while the polyacrylic acid brushes improved dispersiveness. The d (0.5) (particle size of 50% volume fraction) values of the SiO 2 -coated aluminium sample and that of the sample with the polyacrylic acid brushes grafted on it were 41 μm and 29 μm, respectively. We believe that thus modified aluminium will find use in water-based paints and printing inks.
研究领域:
材料科学
·
表面化学
✓ 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）