PROGRESS IN ORGANIC COATINGS
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2025
·
IF 7.3
Xin Liu,Lu Jiang,Qiushi Li,Yan Dong,Yifan Lv,XinYi Li,LongXu Liu
Corrosion of carbon steel can result in serious damage, limiting its application in various fields. Considerable protective coatings have been proposed, but they are limited by difficulties in repairing and early warning of coating damage and local metal corrosion. Herein, a dual-functional smart anti-corrosion coating with integrated self-healing and self-warning capabilities was designed and fabricated. Firstly, the MBT + CVL@Fe 3 O 4 composite was prepared by loading corrosion inhibitor 2-mercaptobenzothiazole (MBT) and fluorescent probe crystal violet lactone (CVL) into mesoporous Fe 3 O 4 microspheres. The system demonstrated a stimulus-responsive release of MBT, providing effective corrosion inhibition for Q235 steel. Subsequently, the MBT + CVL@Fe 3 O 4 composite was incorporated as a functional filler into a shape memory epoxy (EP) coating. The results showed that the optimum addition amount of filler was 2 wt% because the MBT + CVL@Fe 3 O 4( 2% ) /EP coating presented the smoother surface, maximum water contact angle, and impedance value under damaged conditions. Based on the photothermal effect of Fe 3 O 4 -based filler combined with the shape memory effect of epoxy resin, when irradiated for 60 s, the surface temperature of the scratched MBT + CVL@Fe 3 O 4( 2% ) /EP was about 55 °C, exceeding its glass transition temperature ( T g ≈ 49.5 °C). Consequently, the scratch width was markedly reduced, demonstrating effective self-healing of the external coating damage. Moreover, when the coating damage even caused local corrosion of the metal substrate and changes in the pH of the corroded area, the corrosion inhibitor MBT was responsively released, forming a protective film layer to protect the metal substrate from further degradation. The low-frequency impedance |Z| 0.01 Hz values of scratched pure epoxy coating (EP), scratched MBT + CVL@Fe 3 O 4( 2% ) /EP and photothermal healed scratched MBT + CVL@Fe 3 O 4( 2% ) /EP immersed in 3.5 % NaCl solution for 120 h were 4.98 × 10 4 Ω·cm 2 , 4.78 × 10 5 Ω·cm 2 and 1.31 × 10 6 Ω·cm 2 , respectively, which fully illustrated the dual repair function of the coating. Additionally, the CVL loaded in the filler provided the fluorescence color rendering performance of the coating. Under the irradiation of an ultraviolet lamp, the bright blue fluorescence signal can be displayed at the coating damage site, effectively predicting the coating damage. Moreover, CVL can produce fluorescence quenching when localized corrosion occurs on the metal substrate, warning of early corrosion. These results prove the self-warning performance of the anti-corrosive coating.
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2023
·Vol. 108
·期 3
·768-777
·
IF 2.5
Xue Tong,Yin Yunjie
In this study, a reversible thermochromic wool fabric with excellent color fastness was prepared by reacting thiol-modified thermochromic microcapsules with the fabric. Treatment with tris (2-carboxyethyl) phosphine hydrochloride (TCEP) resulted in the appearance of a large number of thiol groups on the surface of the wool fabric, enabling the formation of disulfide bonds with thiol-containing microcapsules. The effective introduction of thiol groups onto the microcapsule surface and their incorporation onto the wool fibers was confirmed by FTIR analysis. DSC measurements revealed that the color transition temperature of the thiol-modified microcapsules was 48.98 °C. The photos of the color-changing process of the microcapsule solution and the variations in color parameters during the heating-cooling cycles demonstrated the excellent color-changing characteristics of the microcapsules. The covalent bonding between the thiol-modified microcapsules and the wool fabric contributed to its high color fastness. When the dosage of 3-mercaptopropyltriethoxysilane was 10% of tetraethyl orthosilicate, the fading fastness of the thermochromic wool fabric reached grade 3, while the staining fastness reached grade 5. The wet rubbing and dry rubbing fastness were at grade 3 and grade 4, respectively. Even after undergoing 30 cycles of heating and cooling experiments, the K/S value of the thermochromic wool fabric remained stable. Graphical Abstract
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Guojian Yang,Baige Yang,Weijia Mu,Yinghao Ge,Yiru Cai,Zhiqiang Yao,Zhaoyu Ma,Yu-Mo Zhang,Sean Xiao-An Zhang
Due to the high energy efficiency and a wide range of potential applications in daily life, bistable electrochromic devices (BECDs) have gained extensive attention in recent years. However, poor bistability and slow response rate are the main barriers, which restrict the development of BECDs. Herein, a transparent multidimensional electrode with indium tin oxide (ITO) nanofibers and gold nanoparticles was fabricated to improve both the bistability and responsiveness of devices. Its criss-crossed ITO nanofibers with high length-to-diameter ratios to reduce the distance of heterogeneous electron transfer and its gold nanoparticles to form a stable Au–S bond to avoid self-erasing of electrochromic materials have been demonstrated and discussed systematically. This device based on the transparent multidimensional working electrode had a shorter response time (1/5) and a longer bistability (12/1) compared with the prototype devices based on common fluorine-doped tin oxide electrodes. Besides, this device had a promising electrochromic performance with a high coloration efficiency of 448.27 cm2/C and a switching stability with no significant attenuation after 1200 cycles.
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PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Yingdong Cui,Xia Zhao,Zuquan Jin,Xiaohong Ji,Jizhou Duan,Baorong Hou
Organic coatings sustain damage during service inevitably. Accurately locating the damaged site and healing it simultaneously to prevent substrate exposure are significant challenges in extending the service life of metallic structures. This study reports on a smart protective coating with self-reporting and self-healing capabilities. The strategy was realized by embedding polyacrylonitrile (PAN) core-shell nanofibers containing 2-amino-1,3,4-thiadiazole (2-AT) and crystal violet lactone (CVL) into organic coatings. When the PAN@2-AT/CVL coating was damaged, CVL at the damaged site emitted bright blue fluorescence under UV light, while 2-AT could adsorb and form a thin film on the steel surface to inhibit corrosion. Furthermore, the flexibility of the PAN@2-AT/CVL coating was significantly enhanced compared to the blank coating, which helped to reduce the formation of microcracks in the coating. The smart coating was expected to be widely applied for the protection of infrastructure in marine environments, offering new solutions for improving the performance of metallic protection materials.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yanshu Xiang,Yongjie Zhao,Yifan Jiang,Jiarui Feng,Xiaoyi Zhang,Wei Su,Yingjie Zhou,Peng Wei,Sze Shin Low,Hao Nan Li
The sophisticated environment of chronic wounds, characterized by prolonged exudation and recurrent bacterial infections, poses significant challenges to wound recovery. Recent advancements in multifunctional wound dressings fall short of providing comprehensive, accurate, and comfortable treatment. To address these issues, a battery-free and multifunctional microfluidic Janus wound dressing (MM-JWD) capable of three functions, including exudate management, antibacterial properties, and multiple indications of wound infection detection, has been developed. During the treatment, the fully soft microfluidic Janus membrane not only demonstrated stable unidirectional fluid transport capabilities under various skin deformations for a longer period but also provided antibacterial effects through surface treatment with chitosan quaternary ammonium salts and poly(vinyl alcohol). Furthermore, integrating multiple colorimetric sensors within the Janus membrane’s microchannels and a dual-layer structure enabled simultaneous monitoring of the wound’s pH, uric acid, and temperature. The monitoring was facilitated by smartphone recognition of color changes in the sensors. In vivo and in vitro tests confirmed the exudate management, antibacterial, and sensing capabilities of the MM-JWD, proving its efficacy in monitoring and promoting the healing of wounds. Overall, this study provides a valuable method for the design of multifunctional wound dressings for chronic wound care.
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PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Qi Liu,Chongqin Xu,Guiying Wang
In this work, a continuous thermochromic energy storage material (CTESM) was developed based on two distinct mechanisms, which provided a wider range of colors. Separate formulations of thermochromic energy storage materials were made using hexadecanol as the solvent, crystal violet lactone (CVL) as the color former, bisphenol A (BPA) as the developer, or crystal violet lactone and cresol red (CSR) interacting as color former and developer, respectively. More color changes were explored according to the above two combinations. Functional groups and thermal properties of CTESM were studied utilizing Fourier Transform Infrared, Thermogravimetry Analysis, X-ray diffraction and differential scanning calorimetry. This research indicates that the maximum color difference, which occurs in the condition that the ratio of CVL:BPA:CSR:HD is 2:1:2:140, enables transitions from blue-gray to green hues and then to red. Overall, CTESM has excellent thermal stabilities and cycling capabilities, leading to significant potential in anti-counterfeiting and sensors.
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高影响因子
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
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2017
·Vol. 28
·期 8
·1475-1482
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IF 1.198
Xu Zhiqun,Wu Qiao,Duan Yunjian,Yang Meixia,Ou Minrui,Xu Xiaoping
Bisphenol A (BPA) is an industrial material which can lead to endocrine disorders. In this work, a simple and sensitive spectrophotometric method for determination of BPA using diazotization-coupling reaction was presented. To achieve the best performance of the developed method, the experimental parameters were optimized in terms of reagent concentration, reaction time, pH, and temperature. Under the optimal conditions, the absorbance increased linearly with the increasing concentration of BPA in the range of 0.16-10.4 µg mL-1 with the correlation coefficient of 0.9991 and the detection limit of 0.05 µg mL-1. Results achieved with the spectrophotometric method were compared with those obtained using high performance liquid chromatography (HPLC) method. The proposed method was successfully applied to determine BPA in milk and water bottle samples and satisfactory results were obtained, which make it very suitable for routine analysis of BPA in quality control laboratories.
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高影响因子
APPLIED ENERGY
·
2024
·
IF 10.1
Wenhui Zhang,Hang Zhang,Shuhui Liu,Xingxiang Zhang,Wei Li
A novel sensitive thermo-chromic microcapsules with inorganic/organic nanoparticles-embedded composite shell was designed and synthesized, and the thermal properties, thermo-chromic performance, crystallization behavior of ethyl myristate (EM) in confined spaces were studied in this paper. As the reaction proceeded, the aminated silica (NH 2 -SiO 2 ) nanoparticles modified outer shell in the aqueous phase and isophorone diisocyanate (IPDI) in the oil phase gradually self-assembled at the inner interface, leading to the formation of an inorganic/organic polymers composite shell. The effect of NH 2 -SiO 2 nanoparticles content on the crystallization behavior, microstructure, morphology, and phase-change properties as well as the thermal stability of MPCMs were investigated in detail. Interestingly, the covalent attachment of NH 2 -SiO 2 nanoparticles on the capsules surface offered long-term chemical stability compared to that of conventional physical adsorption. The NH 2 -SiO 2 nanoparticles were found distributed uniformly on the surface of MPCMs, and the onset crystallization temperature of MPCMs increased by 7.3 °C with NH 2 -SiO 2 nanoparticles addition of 15% content, which counteracts the super-cooling phenomenon. Microcapsule temperature change optical microscopy and non-isothermal crystallization kinetics revealed that the crystallization of RS-MPCMs were homogeneous as well. RS-MPCMs have significant potential in green energy applications due to their latent heat storage, thermal stability, thermal conductivity, leakage prevention, and mechanical properties.
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高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Lu Yang,Jiaguang Meng,Lingjie Yu,Xingyun Gao,Yuqing Chen,Yongzhen Wang,Tao Xue,Yaming Liu,Chao Zhi
Temperature/humidity dual-responsive fabrics, which can change color when exposed to heat and moisture separately or simultaneously, demonstrate excellent reversibility of color-changing. Herein, thermochromic microcapsules were synthesized and mixed with humidity-sensitive discoloration materials to create dual-responsive fabrics using screen printing technology. As the temperature rises from 30 to 80 °C, the fabric shifts from green to magenta. Similarly, as relative humidity drops from 100 % to 0 %, the fabric transitions from green to purple. The color of the fabric changes in a certain gradient by heat and moisture simultaneously. The fabric showcases a dependable, reversible color change, broadening the spectrum of visual possibilities. After enduring 30 rubs and 30 washes, the fabric's color difference value only slightly decreased, affirming its durability. Compared to untreated fabrics, dual-responsive fabrics exhibit remarkable flexibility and breathability. Therefore, this smart fabric was utilized to create fashionable garments, showcasing its visual effects across various temperatures. Simulations further examined its potential applications in monitoring human skin and equipment temperature, detecting humidity levels in storage, and information encryption. With its versatile properties, this intelligent fabric holds highly desirable properties for applications in textile fashion, environmental monitoring, and healthcare.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Qi Liu,Shan Gao,Guiying Wang
In this study, a novel series of thermochromic phase change materials (TC-PCMs) with multicolor responsiveness and superior thermal energy storage capabilities were developed successfully. The monochromatic thermochromic microencapsulated phase change materials (TC-MPCMs) cores were prepared using bisphenol A as the color developer, crystal violet lactone or 6′-(diethylamino)-1′,3′-dimethylfluoran or 2′-(dibenzylamino)-6′-(diethylamino)fluoran as color former, and tetradecanol as solvent, showing blue, red and green respectively. Binary formers combinations produced purple, cyan and reddish-brown microcapsules, with cyan and reddish-brown systems showing intermediate green transition state. The microcapsules were embedded in polyvinyl alcohol/waterborne polyurethane matrices to prepare thermochromic films (TC-F), with trimesoyl chloride to modify the films' water resistance. The thermal properties, chromic characteristics, thermal stability, microstructure, mechanical properties, and surface modifications of the materials were systematically analyzed using relevant characterization techniques. The results showed that the enthalpy values of TC-PCMs, TC-MPCMs, and TC-F were around 200 J/g, 125 J/g, and 10 J/g, respectively, exhibiting favorable thermal storage characteristics. The size of TC-MPCMs decreases with increasing emulsion dosage. The mechanical properties of the TC-F decrease as the amount of TC-MPCMs added increases. The water contact angle of the modified film showed a significant increase, indicating excellent hydrophobic properties. Both TC-MPCMs and TC-F maintained execellent performance after 100 thermal cycles, demonstrating exceptional durability. Furthermore, experimental tests of TC-F as a temperature-indicating label demonstrated rapid thermochromic response during heating. Thus, this engineered material shows significant potential for applications in wearable devices, temperature sensors, and anti-counterfeiting technologies.
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高影响因子
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