PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Xianliang Li,Bin Gong,Yijie Jin,Zhihao Chen,Wenzhong Yang
In this study, we present a facile strategy to construct a smart PN-Zn-MOF-74 nanocontainer-based coating with outstanding triple functions including the barrier effect, as well as self-healing and self-reporting features. Flattened 2D PN-Zn-MOF-74 nanocontainers were synthesized by decorating the hexagonal boron nitride (h-BN) sheets with a polydopamine (PDA) layer, which was employed to interlink the Zn-MOF-74 nanodevices. The composite nanocontainers were then uniformly dispersed in a waterborne epoxy coating (WEC) and coated onto Q235 mild steel surfaces. Thus, as the Fe 3+ and H + ions were gradually released from the localized corrosion sites, the encapsulated active inhibitors (Zn 2+ and PDA) in PN-Zn-MOF-74 were exchanged and released promptly to form a robust protective film, coating the micro-damaged sites. The EIS results indicated that PN-Zn-MOF-74 with two inhibitors demonstrated a remarkable active corrosion protection performance, with the |Z| 0.01Hz value increasing from 381 Ω cm 2 (blank) to 1389 Ω cm 2 (PN-Zn-MOF-74). However, the cation exchange between Fe 3+ and Zn 2+ can collapse the fluorescent Zn-MOF-74 and form a weak fluorescent compound at the damage sites, achieving the self-reporting ability of the coating. In addition, the coating adhesion test and cross-sectional images showed that the presence of PN-Zn-MOF-74 can effectively strengthen the impermeability of the composite coating, guaranteeing its long-lasting barrier properties. The coating demonstrated a higher |Z| 0.01Hz value (4.91 × 10 9 Ω cm 2 ) despite following 504-h immersion tests, which was over 2 orders of magnitude higher than that of the blank WEC coating. This study provides a simplified and feasible method for augmenting the dependability, practicality, and versatility of anti-corrosion polymer coatings.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
产品关联
DOI
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.
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
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Yang Lei,Yan Xu,Qing Zeng,Jingyi Xia,Shaochun Xie,Bo You
The preliminary detection and instant repair of local metal corrosion under protective coatings is of great importance for long-term application of metal materials in their lifecycles and reduction of environmental impact and carbon emissions. Here, inspired by beanpod, a smart anti-corrosive epoxy coating based on pH-responsive microcontainer was fabricated. The beanpod-inspired microcontainer (micropod) was composed of high-capacity hollowed mesoporous silica nanoparticles/graphene oxide (MSN-NH 2 /GO microcontainer) loading indicator and inhibitor 1,10-phenanthroline (Phen). The pH-responsiveness of the micropod was derived from GO electrostatic valve interacting with MSN-NH 2 whose surface charge varied at different pH values to control the release of Phen. When under-coating corrosion happened with increasing pH value, Phen escaped from the detached micropod and coordinated with dissolved Fe 2+ to develop red-orange coloration and form passive complex film retarding the corrosion to realize corrosion sensing and inhibition. GO also enhanced the corrosion resistance of coating because of the high aspect ratio which can prolong the diffusion pathway of corrosive media in coatings. The Phen@micropod/epoxy anti-corrosive coating performed well in immersion test and salt-spray test and remained intact in 30-day immersion test, the R c of which was 1000 times higher than pure epoxy 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
Small
·
2022
·Vol. 18
·期 46
·2204479
·
IF 15.153
Yixuan Shang,Lijun Cai,Rui Liu,Dagan Zhang,Yuanjin Zhao,Lingyun Sun
Water contamination resulting from heavy metal ions (HMIs) poses a severe threat to public health and the ecosystem. Attempts are tending to develop functional materials to realize efficient and intelligent adsorption of HMIs. Herein, self-propelled structural color cylindrical micromotors (SCCMs) with reversible HMIs adsorption capacity and self-reporting property are presented. The SCCMs are fabricated by using platinum nanoparticles (Pt NPs) tagged responsive hydrogel of carboxymethyl chitosan (CMC) and polyacrylamide (PAM) to asymmetrically replicate tubular colloidal crystal templates (TCCTs). Owing to the self-propelled motion of the SCCMs, the enhancive ion–motor interactions bring significantly improved decontamination efficiency. Moreover, it is demonstrated that the SCCMs can realize quick and naked-eye-visible self-reporting during the adsorption/desorption process based on their responsive structure color variation and superior adsorption capacity. Thus, it is anticipated that such intelligent SCCMs can significantly facilitate the evolution of sensing assays and diverse environmental fields.
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
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yaxin Chen,Wei Li,Jing Luo,Ren Liu,Guanqing Sun,Xiaoya Liu
Dye-filled microcapsules are an attractive way to identify microscopic damage of materials by the naked eye. However, there are many disadvantages in traditional microcapsule-based self-reporting materials, such as a poor self-reporting effect. A new concept for the design of self-reporting microcapsules is presented here. Our work develops a novel kind of dual-compartmental microcapsule via Pickering emulsion photopolymerization, which can encapsulate two interacting species (“pro-dye” and “developer”) separately in a single microcapsule. In our strategy, SiO2 microspheres encapsulating polyetheramine (PEA, developer) were first prepared and employed as a Pickering emulsifier to stabilize oil-in-water emulsions, in which the oil phase consisted of 2′,7′-dichlorofluorescein (DCF, pro-dye) and a monomer. After the monomer polymerization, a dual-compartment microcapsule, which encapsulated the pro-dye in the core and the developer in the shell, was obtained. Upon the rupture of the microcapsule, the pro-dye and the developer were released simultaneously and reacted to yield a pronounced chromogenic response. Compared with traditional double-microcapsule systems, this dual-compartment microcapsule system demonstrated a more efficient and pronounced self-reporting effect. This is the first time that a double-encapsulation scheme involving the compartmentalized release of two interacting species within a single microcapsule has been demonstrated for self-reporting, which overcomes the tough problems of the uneven distribution of the traditional double-microcapsule systems.
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
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Huijie Huangfu,Xugeng Guo,Ning Li,Ye Xiong,Yafei Huang,Jinglai Zhang,Li Wang
Smart coatings play crucial roles in realizing excellent corrosion protection on metals and alloys. However, the preparation of smart composite coatings exhibiting self-reporting and self-healing dual function still remains a challenge. Herein, a novel smart composite coating was successfully fabricated by incorporating the ionic liquid grafted carboxylated carbon nanotube and phenolphthalein into a micro-arc oxidation coating (MAO/PP/CCNT-IL) for AZ31B Mg alloy protection. The electrochemical tests including potentiodynamic polarization and electrochemical impedance spectroscopy reveal that the MAO/PP/CCNT-IL composite coating shows the best corrosion protection on the AZ31B Mg substrate among all coatings prepared in this work. In addition, the salt spray experiment in 5 wt% NaCl solution suggests that the occurrence of conspicuous pink within only 12 min can rapidly warn microdamage and microsurface damage, exhibiting a self-reporting effect. Meanwhile, the smart coating also presents outstanding healing property by reacting CCNT-IL with Mg ions from the substrates to generate the chelates to be covered on the damaged area. Such a smart coating offers a feasible strategy for prolonging the service lifetime of Mg alloys through a convenient, economical and effective way with a promising application in the field of material protection.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 6
·065304
·
IF 1.449
Boping Wang,Qihang Gao,Bo Zhang,Xiaobing Yan
Structural color, an important functional component of many organisms, is widespread in the natural world. The value of WS2 is being gradually recognized. Inspired by these phenomena, an intelligent structural color material, with a heterogeneous striped pattern that is based on WS2 nanosheets, is presented here. When irradiated with light, the material is endowed with light-controlled, reversible, bending behavior with self-reporting color indication. Furthermore, the material has a high stability index and a small maximum bending angle. Most interestingly, because of the WS2 nanosheets' strong photoluminescence ability, the structural colors' intensity is increased. This material can be used as light-triggered, dynamic barcode labels for anti-counterfeiting different products. These features of the bioinspired structural color stripe pattern of the material indicate its potential for constructing binary information storage devices, intelligent sensors, and so on.
研究领域:
材料科学
·
光学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Weichao Song,Xia Zhao,Zuquan Jin,Xiaohong Ji,Liang Fan,Shuai Yuan,Fubin Ma,Junying Deng,Jizhou Duan,Baorong Hou
Biomimetic microvascular networks prepared by coaxial electrospinning technology have attracted much attention as a novel form of carrier for encapsulating active substances. However, the poor interfacial bonding strength between traditional electrospinning materials and metal substrates limits its application in anti-corrosion coatings. Herein, a novel poly(vinyl alcohol) grafted phytic acid (PVA-PA) electrospinning solution was synthesized. And a sandwich-like microvascular network (SMN) was prepared by coaxial electrospinning technology, which used PVA-PA solution as the shell material, epoxy resin 51 (E51), tetraphenylethylene (TPE) and polyamide resin as the core materials, respectively. Owing to the high porosity of SMN, epoxy resin can be directly spin-coated on it to form a composite coating (PVA-PA/SMN/EP). It is proved that due to the strong chelation and coordination interaction between PA and mild steel, the pull-out adhesion of the PVA-PA/SMN/EP composite coatings on mild steel was increased by 0.92 MPa. In addition, by systematically optimizing the relative viscosity, miscibility, conductivity, and saturated vapor pressure between the two jets of the core solution and the shell solution in coaxial electrospinning, the microvascular structure of the coaxial electrospinning nanofibers was improved and the fluidity of the internal active substances was maintained. When the PVA-PA/SMN/EP composite coating generates microcracks, the active substances encapsulated in the SMN flow out, in which the three-dimensional crosslinked network formed by the curing of E51 and polyamide resin enhances the spatial interactions between TPE molecules, which results in TPE emitting a bright blue fluorescence. This work provides a new approach for the development of the next generation of smart anti-corrosion coatings.
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 MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Hao Li,Xian-Ze Meng,Hao-Jie Yan,Run-Chao Zheng,Hui-Song Hu,Bing Lei,Qing-Hao Zhang,Lian-Kui Wu,Fa-He Cao
Corrosion activities and related accidents are significant issues for marine facilities, leading to considerable economic losses. Waterborne epoxy (EP) coating has been seen as one of the optimal options for corrosion protection due to its stable properties and eco-friendliness (0 g/L volatile organic compounds). Nevertheless, several intrinsic deficiencies require improvement, such as fragile mechanical properties and defects (macro and micro), resulting in the continuous deterioration of comprehensive coating performances. In this work, a novel nanocomposite coating with mechanical enhancement, intelligent self-reporting, and active protection is fabricated by integrating the functionalized and compatible graphene oxide/cerium based metal-organic framework multiscale structure (GO-CeMOF-P/M). Notably, the homogenous dispersion of GO-CeMOF-P/M and its chemical interaction with the polymer matrix effectively reduces the defects resulting from solution volatilizing and enhances the compactness, which boosts the tensile strength (32.1 MPa/8.5%) and dry adhesion force (5.8 MPa) of the coating. Additionally, the controllable responsiveness and release of multiscale nanocomposite within external environments endow intelligent active protection and self-reporting characteristics for the GO-CeMOF-P/M-EP coating, making it especially suitable for a variety of practical marine applications. Furthermore, following immersion of 80 d in the aggressive environment, Z f =0.01 Hz value of GO-CeMOF-P/M-EP coating is 1.2 × 10 10 Ω·cm 2 , which is 164.4 times larger than that of EP coating (7.3 × 10 7 Ω·cm 2 ), demonstrating remarkably strengthened anti-corrosion ability. Consequently, by offering an intriguing design strategy, the current work anticipates addressing the inherent deficiencies of EP coating and facilitating its practicality and feasibility in real sea environments.
研究领域:
材料科学
·
海洋工程
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jun Li,Yun-Jie Wei,Xian-Ling Yang,Wan-Xia Wu,Meng-Qian Zhang,Meng-Yang Li,Zu-E Hu,Yan-Hong Liu,Na Wang,Xiao-Qi Yu
To maximize the utilization and response to the high oxidative stress environment of tumor sites while avoiding the dilemma of enhancing reactive oxygen species (ROS) response in a single way, mitochondrial targeting combined with fluorescent self-reporting polymeric nanocarriers (1K-TPP and 2K-TPP) with grafted structures were synthesized via a chemoenzymatic method in a high yield to simultaneously enhance the drug delivery of endogenous ROS responses. 1K-TPP and 2K-TPP loaded doxorubicin (DOX) at a high content over 12% and formed homogeneous spherical micelles. In vitro, both of them showed promising high sensitivity (detection limit below 200 nM H2O2), fast response, and ratiometric fluorescent self-reporting properties (fluorescent enhancement more than 200 times) to ROS and excellent stability under physiological conditions, while achieving a rapid release of the DOX in response to 1 mM H2O2. Cell co-localization experiments exhibited that they had favorable mitochondrial targeting, and mitochondrial isolation experiments also confirmed that the TPP-modified 1K-TPP selectively accumulated nearly three times in mitochondria than that in total cells. The internalization of 1K-TPP and 2K-TPP into cancer cells was greatly improved by nearly 200% compared to that of unmodified control (1K-OH and 2K-OH) and also explored a unique energy-dependent endocytosis. Furthermore, stimulation of endogenous ROS enhanced the green fluorescence intensity (up to 51.4%) of the linked probe so as to destroy the internal structure of the nanocarriers, achieving self-reporting of the drug’s intracellular release and tracking of the intracellular location of nanocarriers. The cytotoxicity of DOX-loaded 1K-TPP and 2K-TPP in tumor cells with a higher ROS content showed statistical superiority to that of 1K-OH and 2K-OH, benefiting from the extremely good endogenous ROS response sensitivity leading to the differential selective release of drugs. These results demonstrate the potential of 1K-TPP and 2K-TPP, especially for 1K-TPP, as mitochondria-targeted, fluorescent self-reporting nanocarriers for combined enhancement of endogenous ROS responsiveness.
研究领域:
生物医学工程
·
药剂学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Zihao Guo,Tian Li,Tanlin Chen,Dandan Zhi,Yingrui Tian,Chaozhe Hao,Baozhu Wang,Ximei Wen,Fanbin Meng
Detecting and repairing coating damages at nanoscale or microscale are essential for metal corrosion protection. Here, we develop a smart anticorrosion coating with autonomous self-reporting and self-healing abilities by saline-responsive triggered polyaniline (PANi) nanocapsules containing a fluorescein isothiocyanate (FITC) fluorescent indicator and benzotriazidazole (BTA) corrosion inhibitor. Once the damaged coating is wet with the salt solution, the sodium ions penetrate the crack and react with PANi, causing a gating effect of PANi nanocapsules to be triggered and opened. This leads to the diffusion of molecules and expelling of the guest payload from the capsule mesopores. Therefore, the scratched FITC@PANi/Epoxy coatings express pronounced green fluorescence signals under UV light irradiation within only 30 min, highlighting the coating failure. Meanwhile, the microcracks can be promptly repaired with the BTA@PANi/Epoxy coatings, and their long-term anticorrosion properties are further extended under a NaCl solution, indicating the prolonged service lives of the coatings. Therefore, the salt-responsive release strategy with self-reporting and self-healing functions allows for timely corrosion warning, fast crack repair, and effective extension of barrier performance, which is appealing and of great importance in practical applications.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 18
·2860-2868
·
IF 4.776
Bing Wang,Ji Zhang,Yan-Hong Liu,Wei Zhang,Ya-Ping Xiao,Rui-Mo Zhao,Xiao-Qi Yu
In the past few decades, although various reduction-responsive nanocarriers have been designed and explored for gene delivery, it is difficult to directly detect or monitor the reduction capability of these carriers, especially under intracellular conditions. Taking advantage of the generated fluorescence signal in the reduction process of the naphthalimide-sulfonamide (NS) group, we developed a novel liposomal nanocarrier, FNSL, which showed reduction-sensitive property and self-reporting character. As a new reduction-responsive site in a gene delivery system, the NS group in FNSL is capable of responding to glutathione (GSH) and simultaneously emitting green fluorescence at 500 nm in both extra- and intracellular circumstances. Hence, it will be very convenient to assess the reducibility of this carrier and monitor the stimuli-responsive gene release via fluorescence signal. FNSL has high affinity for DNA and can condense it into nanoparticles with a proper nano-size and zeta potential. Compared with the non-reducible FNAL, FNSL showed enhanced gene release capability, higher transfection efficiency (TE), and lower cytotoxicity. Furthermore, treatment of FNSL-mediated transfection with slightly exogenous GSH greatly improved the TE of FNSL in HepG2 cells, and its TE was even higher than that of Lipofectamine 2000. These results demonstrate that FNSL possesses great potential for efficient and low-toxicity gene delivery, and this study on a bioreducible liposome with self-reporting ability would be a guide for further research on the development of biodegradable gene carriers.
研究领域:
生物医学工程
·
药物传递系统
·
分子生物学
·
纳米医学
·
生物材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）