CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yang Wu,Ying Dai,Yijun Liu,Wen Chen,Xinmei Pei,Fanfeng Xie
Novel eco-friendly green pigments, Pr x Ca 2 -x Al 2 SiO 7 (0 < x ≤ 0.1) were synthesized via a solid-state method using Pr 6 O 11 as the coloring oxide and Ca 2 Al 2 SiO 7 as the base material. The results reveal that praseodymium (Pr) ions dissolved into the Ca 2 Al 2 SiO 7 lattice, with the green coloration primarily attributed to Pr 3+ in the lattice. The solid solution was influenced by both temperature and the amount of Pr 6 O 11 introduced. A bright green pigment with composition Pr x Ca 2 -x Al 2 SiO 7 ( x = 0.08) was obtained by maintaining the material at 1350°C for 1.5 h, yielding chromatic parameters L*: 78.29, a*: -18.37 and b*: 27.51. Pr 3+ , responsible for coloration, are retained in an octahedral coordination environment by substituting Ca 2+ in the Ca 2 Al 2 SiO 7 lattice, while Pr 4+ are converted to Pr 3+ when the temperature exceeds 1323K. The newly synthesized pigment is non-toxic, harmless, and exhibits remarkable thermal stability, its successful application to biscuit ceramics highlights its potential as a sustainable and eco-friendly pigment for the ceramics industry.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2016
·
IF 3.449
Longyun Hao,Rui Wang,Kuanjun Fang,Yuqing Cai
The cotton samples were treated by chitosan solution at acidic condition to modify their dyeing properties to anionic coloring materials. By fluorescence spectrum together with FTIR, XRD and TGA analysis, it was concluded that the chitosan molecules could spontaneous transfer from solution onto cotton surface yet would not influence its internal structure. In order to color the chitosan-treated cotton, an anionic polystyrene-encapsulated copper phthalocyanine (CuPc) pigment was prepared in a miniemulsion process. The full encapsulation of nano-pigment could be directly observed by TEM . The encapsulation would not alter the crystal structure and color properties of CuPc while could make the nano-pigment more stable against centrifuge and temperature variation. Finally, the dyeing properties of this encapsulated nano-pigment on chitosan-treated cotton samples were studied. It was indicated the chitosan molecules on cotton had great capability to improve the uptake of encapsulated nano-pigment mainly due to the accessible amino groups introduced.
研究领域:
材料科学
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纺织工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Meiqi Zhang,Yijie Yang,Luo Feng,Xiaoqi Sun
Near infrared reflective inorganic pigment YIn 1-x-y Mn y Fe x O 3 (x/y = 0.1–0.5) was prepared by solid state reaction. The X-ray diffraction analysis and CIE1976 L*a*b* colorimetric analysis reveal that the main phase of the sample is changed from YInO 3 phase to YFeO 3 phase and the color of the sample is changed from blue to black (x ≥ 0.4) with the increase of iron content. The brightness value of black pigment ranges from 23.27 to 32.12. When In 3+ is replaced by Fe 3+ and Mn 3+ , the band gap of the black sample is decreased from 1.73eV to 1.39eV. The near-infrared reflectance (R) and near-infrared solar reflectance (R*) of the sample reach the maximum when x = 0.4 and y = 0.1, which are 77.82% and 53.44%, respectively. YIn 1-x-y Mn y Fe x O 3 (x = 0.4–0.5, y = 0.1–0.5) black samples have higher near infrared reflectivity than common commercial black pigments. In the thermal insulation study, under the condition of infrared irradiation for 90 min, the internal air temperature difference between the iron car model coated with YIn 0.5 Mn 0.1 Fe 0.4 O 3 pigment and the iron car model coated with commercial iron black pigment can reach 7 °C. YIn 0.5 Mn 0.1 Fe 0.4 O 3 black pigment was soaked in 5% acid-alkali solution for 24 h, the chromaticity was almost unchanged before and after immersion, indicating that the sample has good chemical stability. The above properties show the potential of synthetic black pigments in the field of energy conservation.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xinlong Tang,Qiong Duan,Yukai Chen,Zilin Yi,Hao Jiang,Yaru Ni,Liang Fang,Chunhua Lu,Zhongzi Xu
Inorganic pigments are a commonly used colorant with various applications and promising prospects. However, the implement of organic pigments is hindered by poor dispersion stability in coatings due to non-uniform morphology and size. Herein, encapsulated pigments of Cobalt Chrome Green CoCr 2 O 4 (PG 26), Cobalt Blue CoAl 2 O 4 (PB 28), Titanium Chrome Yellow TiCrSbO 6 (PB 24) in epoxy microspheres are obtained via an oil-in-water emulsion polymerization. The morphology, particle size, thermal properties, glass transition temperature ( T g ) and color performance of the composite microspheres were characterized by different analytical techniques. The average particle size varied with pigments types and loadings. When the content of CoCr 2 O 4 and CoAl 2 O 4 is in the range of 15 wt%-30 wt%, and TiCrSbO 6 content is between 15 wt%-25 wt%, the composite microspheres exhibit a narrow particle size distribution, regular morphology, and smooth surface. The size followed the rule of CoAl 2 O 4 /epoxy (20–26 μm) > CoCr 2 O 4 /epoxy (1 4 -16μm) > TiCrSbO 6 /epoxy (6–9 μm). Besides, according to the aggregation-induced emission (AIE) principle, the relationship between fluorescence intensity and reaction time was investigated, thus deducing the curing process of the epoxy groups with m-xylenol dimethylamine (MXDA). The kinds of three inorganic fillers exhibit varying effects on the diffusion process of MXDA. TiCrSbO 6 promotes the progress of the epoxy-amine curing reaction. Notably, CoCr 2 O 4 microspheres exhibited stable green value (a*) and color saturation (C*), TiCrSbO 6 microspheres showed increased yellow value (b*) and saturation (C*), and CoAl 2 O 4 microspheres enhanced blue value (b*) with minimal change in lightness (L*). Overall, this study provides a comprehensive understanding of the properties of inorganic pigment/epoxy composite microspheres and highlights their potential for improved dispersion stability in coating applications.
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
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jian He,Feng Jiang,Sihan Yang,Longjiao Chang,Bin Wang,Xuejiao Wang
Currently black pigments face challenges of non-ideal luminance factor (L-value), and the presence of potentially hazardous cobalt (Co). A novel stable Na 2 NiMn 2 O 6 (NNMO) black pigment is reported in this work. The pigment exhibits excellent properties, including an ideal low L-value, Co-free composition, and stable bright black hue. A range of analytical techniques are employed to evaluate the properties of the novel pigment, including XRD, SEM, EDS-Mapping, XPS, UV–V is , and CIELAB colorimetry. The chromaticity parameters of the black pigment are L∗ = 24.39, a∗ = 0.21, and b∗ = 0.39. The bright black color of the pigment and the glazing sample was attributed to the combined contributions of Ni 2+ and Mn 3+ /Mn 4+ in the Na 2 NiMn 2 O 6 pigment and NiMnO 3 , Na 4 Mn 9 O 18 , Mn 2 O 3 ingredients in the glazing sample. This research offering valuable guidance for the development of novel, Co-free, and low L-value black pigment.
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
Pigment & Resin Technology
·
2023
·Vol. 53
·期 5
·638-649
·
IF 1.4
Shan Peng,Ranran Yang,Binglong Lei,Yun Gao,Renhua Chen,Xiaohong Xia,Kevin P. Homewood
PurposeThis paper aims to systematically demonstrate a methodology to determine the relative and absolute encapsulation efficiencies (αReandαAb) for thermally- and chemically-robust inorganic pigments, typically like ZrSiO4-based pigments, thereby enhancing their coloring performance.Design/methodology/approachThe authors designed a route, surplus alkali-decomposition and subsequently strong-acid dissolution (SAD2) to completely decompose three classic zircon pigments (Pr–ZrSiO4, Fe2O3@ZrSiO4and CdS@ZrSiO4) into clear solutions and preferably used inductively coupled plasma-optical emission spectrometry (ICP-OES) to determine the concentrations of host elements and chromophores, thereby deriving the numeric data and interrelation ofαReandαAb.FindingsZircon pigments can be thoroughly decomposed into some dissoluble zirconate–silicate resultants by SAD2 at a ratio of the fluxing agent to pigment over 6. ICP-OES is proved more suitable than some other quantification techniques in deriving the compositional concentrations, thereby the values ofαReandαAb, and their transformation coefficientKRA, which maintains stably within 0.8–0.9 in Fe2O3@ZrSiO4and CdS@ZrSiO4and is slightly reduced to 0.67–0.85 in Pr–ZrSiO4.Practical implicationsThe SAD2 method and encapsulation efficiencies are well applicable for both zircon pigments and the other pigmental or non-pigmental inhomogeneous systems in characterizing their accurate composition.Originality/valueThe authors herein first proposed strict definitions for the relative and absolute encapsulation efficiencies for inorganic pigments, developed a relatively stringent methodology to determine their accurate values and interrelation.
研究领域:
材料科学
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分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yongqing Wang,Fanbing Lai,Qikun Wang,Qinghua Long,Chao Wang,Wenjie Zhang,Qibing Chang
In this paper, high color performance Pr cation doped zircon (Pr-ZrSiO 4 ) yellow pigment has been prepared by inorganic sol-gel method. Meanwhile, the detailed process parameters for preparation of Pr-ZrSiO 4 pigment were systematically investigated. The research results indicate that the optimal process parameters are Pr-doping amount of 6 mol.%, calcination temperature of 900 °C, holding time of 2 h and Si/Zr ratio of 1.05. The synthesized Pr-ZrSiO 4 pigment shows an intense yellow hue, which chromatic parameters are L* = 81.84, a* = 4.36, b* = 70.55 and C* = 70.68. Moreover, the pigment shows outstanding tinting performance for ceramic glaze , suggesting its attractive application in ceramic decoration. XPS analysis demonstrated that the Pr cations in the Pr-ZrSiO 4 pigment consists of two valence states, namely trivalent and tetravalent. Finally, heterogeneously distributed behavior of Pr cations in the pigment was discovered.
研究领域:
材料科学
·
无机化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Fenping Wang,Jiawei Li,Lin Lu,Xiaofei Yan,Ziwen Xie,Dongming Qi
Reversible addition–fragmentation chain transfer (RAFT) emulsion polymerization is a powerful tool for polymer encapsulation of pigment nanohybrids. Conventional RAFT emulsion polymers, however, contain sulfur residues that contribute to undesired odor and deleterious effects on final materials. Our strategy relies on an amphiphilic macromonomer poly(methacrylic acid-co-methyl methacrylate) P(MAA-co-MMA) with an ω-unsaturated end group synthesized in situ via cobalt(II)-mediated catalytic chain transfer polymerization (CCTP) at the surface of C.I. Pigment Blue 15:3 (PB) particles. Subsequently, these macromonomers are used as the living points to mediate the in situ sulfur-free RAFT (SF-RAFT) emulsion polymerization of monomers (butyl methacrylate (BMA) and butyl acrylate (BA)). It was found that a well-controlled polymerization process was achieved by semibatch SF-RAFT emulsion polymerization on the PB surface, as evidenced by the smooth increase in the molecular weight of polymer chains as the polymerization progressed and by transmission electron microscopy (TEM) results. Due to the sealing effect, these polymer/PB hybrid particles exhibited excellent colloidal stability in the aqueous phase. More importantly, film-forming hybrid particles with a soft P(BMA-co-BA) shell were successfully prepared in this work, which suggested that SF-RAFT-mediated polymerization may offer a useful alternative approach to traditional RAFT emulsion polymers for the preparation of organic/inorganic nanohybrids.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
PROGRESS IN SOLID STATE CHEMISTRY
·
2025
·
IF 10.5
Zhiwei Wang,Yinan Shen,Liangsheng Tian,Suwit Suthirakun,Wongsathorn Kaewraung,Qi Menghang,Hang Zhao,Xin Xin,Ruoxiu Xiao,Peng Jiang,Qu Li,Tingting Lu
The coating optimized with high near-infrared reflectance pigments can effectively reduce the energy consumption for heating and cooling in buildings, thereby alleviating the pressure on global energy consumption. Using a high-temperature solid-state method, blue-violet pigments with high near-infrared reflectance, Ca 2 Zn 1- x M x Si 2 O 7 (M = Mn, 0 ≤ x ≤ 0.4 and Ni, 0 ≤ x ≤ 0.2) solid solutions, were synthesized for the first time, with a maximum solar reflectance of 82.67%. Using XPS analysis, it was determined that the oxidation state of Ni in the pigment is +2, while Mn exists in mixed oxidation states of +2 and +3. UV-VIS-NIR spectroscopy analysis indicates that the blue-violet color of the pigment originates from the d-d transitions of the transition metal ions. As the doping concentration increases, the near-infrared reflectance of the pigment decreases. The DFT calculations have also confirmed that the color of pigments originates from transition metal ions. The as-synthesized pigments were incorporated into acrylic to create colored coatings. Improving the near-infrared solar reflectance of the acrylic coating. The excellent high near-infrared solar reflectance and coating property optimization make the synthesized pigment a potential energy-saving coating.
研究领域:
材料科学
·
能源工程
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Qin Yao,Jian Zou,Jun Yang
The high solar reflectance and good colour performance are requisite for the practical application of the colour-cool pigment. In this work, Ce-doped Yb 3 Al 5 O 12 and (Y, Yb) 3 Al 5 O 12 ceramic pigments were prepared by the sol-gel method. Both Ce 3+ and Ce 4+ ions coexist in the doped pigments. Due to the 4f→5d electron transition of Ce 3+ , the Ce-doped pigments have a selective absorption at around 400–520 nm, which is responsible for the yellow hue. The content of the Ce 3+ ion determines the colour performance of the pigment. The size effect from the smaller Yb 3+ ion results in an increased content of Ce 3+ in the Ce-doped pigments, leading to an improved colour performance. The incorporation of Y 3+ ion can effectively decrease the absorption at 975 nm, thereby enhancing the solar reflectance to 80.6 %, while maintaining good colour performance (Yb 0.7 Y 2.1 Ce 0.2 Al 5 O 12 , L* = 91.40, a* = -4.89, b* = 45.33). In a simulation experiment, the ceramic glaze coating based on the prepared pigment showed a temperature reduction of 5.2 °C compared to the commercial yellow pigment ceramic coating .
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 Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Qiuying Wang,Zhiwei Wang,Menghang Qi,Hang Zhao,Xin Xin,Anjali Verma,Theeranun Siritanon,Arthur P. Ramirez,M.A. Subramanian,Peng Jiang
The severe urban heat island effect emphasizes the heightened importance of reducing building energy consumption. Cool pigments with higher near-infrared reflectivity contribute to the overall coating performance of the building. In this work, a novel intense blue pigment with superior infrared reflectance based on Ni-doped Zn2SiO4 was successfully synthesized via the simple solid-state method. The crystal structure, oxidation states, and optical properties are analyzed. The oxidation state of Ni was confirmed to be +2 using magnetic analysis and XPS. The intense blue color exhibited by the solid solution is due to the 3T1(3F) → 3T1(3P) transition of Ni2+ at the tetrahedral sites. UV–vis–NIR spectra demonstrate that this pigment exhibits superior near-infrared reflectance compared to cobalt blue in the range of 900–1700 nm, indicating its potential application in the realm of building energy conservation.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2022
·
IF 5.122
Ming Cao,Yuanyuan Zhang,Meisong Xu,Qiannian Dong,Tianyi Chen,Ru Xia,Jiasheng Qian
Colorful aluminum pigments are commercial demand for the pursuit of a range of aesthetic over the last few years. In this study, a general approach for preparation of colored aluminum pigments is reported by two-step process of poly(dopamine) (PDA) encapsulation and dye conjugation. Firstly, the surface of the aluminum pigment was encapsulated by a PDA layer in an alkaline/ethanol environment (PDA@Al), and orthogonal experiments were investigated to explore the optimal reaction conditions. Secondly, using Disperse orange 11 as typical dye, the PDA@Al were colored by the Michael addition reaction between the functional dyes and quinone structures in the PDA layer. The morphology, component and structure of the colored aluminum pigments was characterized by FTIR, SEM , XPS and TG. The results showed that the corrosion resistance and wettability of colored aluminum pigments were significantly improved. This wok provides a new general strategy for the preparation of colorful aluminum pigments with PDA as the protected and functional layer.
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
危险品化学品经营许可证（带存储）