Polymers
·
2018
·Vol. 10
·期 10
·1097
·
IF 2.935
Zhicheng Wang,Shuping Nie,Ru Xia,Yang Lv,Ming Cao,Ming Chen,Qiannian Dong,Lifen Su,Peng Chen,Bin Yang,Jibin Miao,Zhengzhi Zheng,Jiasheng Qian
Colorization for fabricating aluminum pigments has broad application prospects in recent years. In this study, yellow-colored aluminum pigments with the double-layer structure Al@SiO2@PFMV were prepared using a sol-gel method. A crosslinked copolymeric dye (PFMV) was firstly synthesized by radical polymerization using vinyl triethoxysilane (VTES) and a small molecular dye (FGMAC) as monomers. Then, colored aluminum pigments were prepared by hydrolysis and condensation of the copolymers on the surface of aluminum pigments. SEM, AFM, FTIR, and XPS were used to characterize the surface morphology and chemical structure of the colored aluminum pigments. It was found that the colored aluminum pigments have a heterogeneous and smooth surface layer. The anticorrosion results showed that the colored aluminum pigments had better chemical stability with significantly improving corrosion resistance compared to raw aluminum pigments and Al@SiO2with the single-layer coating. Chromatism analysis indicated that the lightness of Al@SiO2@PFMV pigments decreased slightly and the color changed from silver-gray to yellow.Keywords:aluminum pigments;crosslinked copolymeric dye;corrosion resistance
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
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
Journal of Coatings Technology and Research
·
2021
·Vol. 18
·期 5
·1227-1235
·
IF 2.382
Men Pengchao,Liang Jihong,He Jinxuan,Chen Jian,Geng Bing,Li Wei
Flaky aluminum pigments with excellent corrosion resistance have found applications in diverse fields. In this study, a fluoropolymer has been incorporated in the aluminum pigment to effectively enhance its corrosion resistance, along with the improvement in the chemical resistance and thermal stability. Specifically, a uniform dense layer of poly(trifluoroethyl methacrylate) (PTFEMA) has been directly coated on the surface of the flaky aluminum pigment by in situ polymerization. The encapsulated aluminum pigment exhibited high stability upon dipping in the alkaline solution (pH = 13) due to protection imparted by the fluoropolymer layer. The morphology of the fluoropolymer layer on the surface of the aluminum pigment was characterized by scanning electron microscopy (SEM). Moreover, the thermal stability of the encapsulated aluminum pigment was analyzed by thermogravimetric analysis (TG). The structure and composition of the fluoropolymer layer were further characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The stability of the aluminum pigment in alkaline aqueous media was investigated via hydrogen evolution experiments. Overall, the corrosion resistance of the aluminum pigment encapsulated with fluoropolymer was observed to be markedly improved owing to the presence of the PTFEMA layer.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
COMPOSITE INTERFACES
·
2021
·
IF 2.952
Bin Xu,Chenghua Chen,Enpei Ma,Zhenghuang Wei,Xiaoqing Li
In this study, SiO2/polymer co-coated colored aluminum pigment was prepared by sol-gel method and atom transfer radical polymerization technique. The results of scanning electron microscope (SEM) and transmission electron microscope (TEM) analysis showed that there was a coating layer with the thickness of about 500 nm on the surface of the pigment. X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FT-IR) analysis revealed that the coating layer of the pigment contained SiO2 and polymer of 2-(Dimethylamino)ethyl methacrylate (DMAEMA), indicated that SiO2 and the polymer were successfully coated on the surface of the aluminum powder. Moreover, the co-coated layer of SiO2 and the polymer can effectively prevent the contact between the aluminum powder and the corrosive medium, thereby exhibiting excellent corrosion resistance. In addition, the prepared pigment was made into a pigment paste in a certain ratio and uniformly coated on a polyester fabric, its UPF value was 93.03, which revealed that the coated fabric has excellent ultraviolet protection properties.
研究领域:
材料科学
·
纺织工程
·
表面化学
✓ 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
DYES AND PIGMENTS
·
2022
·
IF 5.122
Zhenchao Luan,Yezhen Chen,Yifei Liu,Xianger Xia,Kunkai Ma,Junzhi Lin,Bing Geng,Hui Li
A novel waterborne aluminum pigment with bright color and excellent corrosion resistance was prepared. The aluminum pigment encapsulation carries out by vinyl sulfone reactive dye after introducing a vinyl-modified layer on the surface. As a typical vinyl sulfone reactive dye, C.I. Reactive Blue 19 (RB-19) can wrap flake aluminum powder and make its surface rich in hydrophilic groups . And the sulfonic acid group of RB-19 also makes it have favorable dispersibility in water. Furthermore, the coating layer composed of vinyl trimethoxysilane (VTMS) and vinyl sulfone reactive dyes can eliminate the hydrogen evolution phenomenon when they are immersed in strongly alkaline solution (5 wt %). This study provides a new strategy for the research of color aluminum pigment.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2015
·
IF 2.587
Benjamin Tawiah,Christopher Narh,Min Li,Liping Zhang,Shaohai Fu
A polymer-encapsulated colorful Al pigment (PCAP) for fabric coatings was successfully prepared by a combined sol–gel spray drying assisted in situ polymerization method, and the near-infrared (NIR) reflectance and ultraviolet protection factor (UPF) of the coated fabrics were investigated. TG-DSC, SEM, and antisolvent test results proved that the reactive dyes were chemically attached to KH-550 modified Al pigment via a covalent bond. The PCAP was stable in strong alkaline (pH 12) or acidic (pH 1) conditions. The NIR reflectance and ultraviolet protection factor (UPF) of PCAP coated cotton fabrics were 80.05% and 290.76, respectively, when the mass ratio of monomer to colorful Al pigment was 1:10 with the coating thickness of 50 μm. PCAP coated fabrics showed excellent color strength, and good washing and rubbing fastness with a relatively good handle.
研究领域:
材料科学
·
纺织工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 19
·8143-8156
·
IF 4.5
Chen Yezhen,Li Xiaoshuang,Luan Zhenchao,Zhu Liyang,Hu Jinxin,Xia Xianger,Ma Kunkai,Geng Bing,Yan Mei
In this paper, the waterborne aluminum pigments with intelligent anticorrosion properties and bright colors were prepared by encapsulating multifunctional composite layers, which were composed of zeolitic imidazole framework (ZIF) and silica. With the results of the micropores and microcracks generated in the silica layer, the penetration of acidic corrosion into the inner layer caused the ZIF layer to release the linker as the corrosion inhibitor and construct a new barrier on the metal surface due to the high corrosion inhibitor content in ZIF. After the pH response, the highest impedance of the aluminum pigments was up to 4.35 × 10 5 Ω cm 2 . The aluminum pigments with the multifunctional composite layers (Al@ZIF-B@SiO 2 ) could maintain stability at pH = 1. Meanwhile, the excellent adsorption and porosity of ZIF were applied to sorb the dye, which endowed the aluminum pigments with bright colors. The functional composite layers on the aluminum pigments eliminated the hydrogen emission, which proved the excellent chemical stability of the prepared samples. The sensitive pH responsiveness of Al@ZIF-B@SiO 2 was also testified. Graphical
研究领域:
材料科学
·
腐蚀与防护
·
纳米复合材料
·
功能涂层
·
高分子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）