Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 30
·15855-15861
·
IF 8.867
Chao Liu,Chunfeng Ma,Qingyi Xie,Guangzhao Zhang
Marine biofouling is one of the most challenging problems today. Silicone polymer based coatings with a low surface energy and elastic modulus can effectively inhibit or release biofouling. However, their non-repairable properties and poor antifouling ability under static conditions limit their applications. Here, we report a self-repairing coating consisting of poly(dimethylsiloxane) based polyurea (PDMS-PUa) and a small amount of organic antifoulant (4,5-dichloro-2-n-octyl-4-isothiazolin-3-one) (DCOIT). The coating can completely recover its mechanical properties after damage either in air or artificial seawater at room temperature. Such recovery can be accelerated at a higher temperature. Moreover, the release rate of DCOIT is almost constant and can be regulated by its concentration. Six-month marine field tests demonstrate that the system has a good antifouling/fouling release performance even under static conditions.
研究领域:
海洋生物学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Yao Huang,Panjun Wang,Weimin Tan,Wenkui Hao,Lingwei Ma,Jinke Wang,Tong Liu,Fan Zhang,Chenhao Ren,Wei Liu,Dawei Zhang
A novel self-healing coating with photothermal and pH dual-responsive properties has been designed to protect carbon steel against corrosion by loading the stimuli-responsive microcapsules into a shape memory epoxy coating. The sandwich-like microcapsules were based on reduced graphene oxide/mesoporous silica (rGO@MS) assembled with a pH-responsive poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) layer, and were loaded with benzotriazole (BTA) inhibitors (abbreviated as rGO@MS-P-BTA). Under near-infrared (NIR) light irradiation, the prominent photothermal effect of rGO could not only elevate the coating temperature to activate the shape memory effect and close the coating scratch, but also facilitate the release of corrosion inhibitors to suppress the corrosion activity. Moreover, the PDMAEMA as a pH-driven “gatekeeper” realized the controlled release of BTA from microcapsules at acid conditions. The surface morphology analysis, electrochemical impedance spectroscopy (EIS), and scanning electrochemical microscopy (SECM) were performed to evaluate the self-healing performance of the composite coatings. The results showed that the combination of NIR light and pH-responsive self-healing effects endowed the coating with short healing time and prominent healing efficiency.
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
Nanomaterials
·
2022
·Vol. 12
·期 14
·2406
·
IF 5.719
Beibei Yang,Jiayu Dong,Haifeng Bian,Haimin Lu,Duan Bin,Shaochun Tang,Yaqiong Song,Hongbin Lu
A self-healing epoxy coating is creatively prepared by employing expired cefalexin loaded into mesoporous silica nanomaterials (MSNs) for corrosion protection of 304 stainless steel (304SS). A series of physical characterizations, including transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectrometer, and N2adsorption–desorption isotherms, verified that the cefalexin successfully filled porous MSN. The corrosion resistance of the epoxy (EP) coating incorporated with the cefalexin@MSNs is investigated using a Tafel polarization curve and electrochemical impedance spectra (EIS) in a 3.5 wt.% NaCl solution. It is found that the EP-Cefalexin@MSNs coating has a higher self-corrosion voltage and a lower self-corrosion current density than EP coating. Moreover, the charge transfer resistance (Rct) value of Cefalexin@MSNs coating is twice that of EP coating after immersion for 24 h, indicating that the cefalexin@MSNs significantly enhance the corrosion resistance of the coating under long-duration immersion. The improved corrosion resistance is attributed to the densified adsorption of the cefalexin inhibiting the cathode corrosion reaction, providing a self-healing long-duration corrosion protection for 304SS.Keywords:self-healing coating;slow release;cefalexin;mesoporous silica;corrosion resistance
研究领域:
材料科学
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腐蚀工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Fei Yu,Hengyu Feng,Linghan Xiao,Yu Liu
Metallic iron oxide nanoparticle-modified graphene oxide (GO) sheets were well applied for stabilizing oil-in-water (O/W) Pickering emulsion, because they were easy to fabricate via a redox reaction between metal salt and GO nanosheets. A systematical investigation was conducted on the impacts of metal salt concentration for preparing the nanoparticle-modified GO, GO aqueous dispersion concentrations and the mass ratios of GO/oil phase on the characteristics of Pickering emulsion. As revealed from the outcomes, the graphene oxide encapsulated GMA microcapsules (GMA@GOMCs) exhibited high loading capacity and thin shell thickness. Then, the microcapsules were embedded into water borne epoxy matrix and fabricated the coating which were capable of healing themselves over surface of hot-dip galvanized steels, as only supplementing a less amounts of microcapsules might achieve almost repaired completely. It’s expected that the GOMCs based on Pickering emulsions can be applicable in a wide range of applications, such as automotive field, weather and marine environments.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Han Zhang,Wen Sun,Lida Wang,Shiheng Ma,Wenxiang Xing,Kun Liang,Guichang Liu
The intrinsic repair ability is a new strategy to prolong the protection life of damaged coatings, but how to maintain long-term corrosion protection during repeated healing remains a challenge. Herein, a self-healing, weather-resistant polyurethane coating with long-term stable corrosion protection enhanced by dopamine-coated graphene oxide (GP) fillers was developed. The formation of hydrogen bond between GP and the amino group in the polyurethane chain enhances the interfacial compatibility of the filler in the coating, thus improves the photothermal, thermal conductivity and barrier properties of the coating. The coating maintains excellent corrosion protection properties after 7 times of scratch-healing cycles, and can withstand up to 15 days of immersion after scratch-healing. The water evaporation rate and deicing rate of the coating are respectively up to 5.57 and 4965.5 kg/(m 2 ·h), achieving a highly photothermal conversion efficiency. In addition, molecular dynamics simulation demonstrates that the hydrogen bonds between GP and polyurethane chains is the key factor for the excellent corrosion protection of the coating. This study opens a new avenue for improving the service life of self-healing coatings in atmospheric environment.
研究领域:
材料科学
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防腐蚀工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2023
·Vol. 44
·期 11
·7972-7984
·
IF 5.2
Zhihao Liu,Shanshan Zhu,Haiwei Zhang,Wenyao Li,Li Jiang,Xing Zhou
With the rapid development of today's society, hydrophobic materials are widely used in many fields due to their excellent hydrophobicity. This article presents a nanocomposite coating with self-cleaning and self-healing properties. The nanoparticles (TiO 2 ) were prepared by hydrothermal method, and the TiO 2 was hydrophobically modified by adjusting the content of stearic acid (SA) and compounded with a synthetic self-healing silicone-containing polyurethane (SiPU). A self-healing nanocomposite coating (SA-TiO 2 /SiPU) with hydrophobic self-cleaning capability was obtained by a simple brushing technique, with a water contact angle of up to 135.1° and good mechanical properties, reaching a maximum tensile strength of 3.11 MPa and a maximum elongation of 537%, and a repair efficiency of 89.39% after 12 h of fracture repair at room temperature. The self-healing properties and stability of the coating can increase the service life of the coating, and the self-cleaning properties can also effectively prevent contaminants from adhering to the surface; its excellent performance has the potential for a wide range of practical applications. Highlights An environmentally self-cleaning composite coating (SA-TiO 2 /SiPU) was prepared in this study. The preparation method of the hydrophobic composite coating is simple. The micro-nano structure of SA-TiO 2 /SiPU is critical for its hydrophobicity. The SA-TiO 2 /SiPU coating with good self-healing properties. The SA-TiO 2 /SiPU exhibited excellent durability and self-cleaning properties.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2019
·Vol. 9
·期 7
·421
·
IF 2.33
Lei Peng,Musong Lin,Sheng Zhang,Li Li,Qiang Fu,Junbo Hou
A self-healing coating with UV-shielding property was prepared in this paper. The self-healing property was based on the inclusion between a host (β-CD-TiO2) and a guest HEMA-Ad). After inclusion of the host and guest, the host–guest complex (HEMA-Ad/β-CD-TiO2) was polymerized with other reactive monomers (HEMA and BA) to obtain the final coating. The coating had good hydrophobicity (water contact angle >90°, moisture absorption rate <2%) and excellent UV-shielding performance (ultra-violet protect factor >90%), and could be firmly bonded to a soft substrate. In addition, the coating had good self-healing property, which means that cracks in the material can recover many times after being damaged and that the UV-shielding ability can be fully restored with the self-healing process.Keywords:coating;self-healing;UV-shielding;host–guest
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 6
·1-11
·
IF 2.8
Han Yu,Wei Chaoquan,Wang Ting,Zeng En
The inevitable damage to paint films during coating applications significantly reduces their protective performance, leaving the underlying substrate vulnerable. Developing self-healing coatings is therefore of critical importance. This study presents the synthesis of polyvinyl alcohol (PVA)/polyurea hybrid microcapsules (MCs) loaded with isophorone diisocyanate via interfacial polymerization in an oil-in-water emulsion, with PVA serving as the emulsifier. These microcapsules were incorporated into acrylic resin, along with a dispersant, co-solvent, and isocyanate curing agent, to formulate a microencapsulated self-healing two-component waterborne polyurethane (2 K WPU) coating. The microcapsules were characterized using TG, FTIR, and SEM. The influence of PVA's polymerization degree and alcoholysis degree on microcapsule properties was systematically analyzed. Results indicate that PVA 1799 as an emulsifier yields microcapsules with minimal surface folds and smooth morphology. When 9 wt% of MC 1799 was added to the 2 K WPU coating, the resulting formulation exhibited optimal performance, achieving an average particle size of 29 μm, along with superior self-healing and anti-corrosion properties. This research offers a novel approach for developing high-performance self-healing coatings with potential industrial 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
Corrosion Communications
·
2023
·
IF 0
Yingxiang Ma,Dan Jiang,Yuping Yang,Li Ma,Jian Zhou,Guosheng Huang,Cunguo Lin
This study proposed a tung-oil based magnetic targeted delivery microcapsules (MDTMs) to enhance the efficiency of self-healing coatings (SHC). Magnetic particles were used as function particles and emulsifier in synthesis of microcapsules (MC). DSC, OM, SEM, TEM, VSM, NSS, EIS and SKP were used to characterize the compounds, structure, healing behavior and anti-corrosion performance. Results indicate that magnetically driven SHC (MD-SHC) reduces 50% migration path of the released tung oil, and increases the release rate of tung oil after the coating is mechanically damaged. SKP and EIS results suggest that the healing part has impressive anti-corrosion performance, scratches were filled with a large amount of tung oil in a short time, and the released tung oil had formed a complete oil film on scratches at 24 h with higher polarization resistance ( R p ). R p of MD-SHC (2.5 × 10 5 –3.6 × 10 5 Ω cm 2 ) is 2.0–2.8 times of that the SHC (1.1 × 10 5 –1.8 × 10 5 Ω cm 2 ). The enrichment in MD-SHC at the interface decreases bonding strength from 7 to 4.5 MPa as the mass additive of microcapsules reaches 15 wt.%. The current work proves the effectiveness of MD-SHC in improving self-healing ability.
研究领域:
材料科学
·
化学工程
·
表面工程
✓ 已验证
DOI
ACS Omega
·
2018
·
IF 0
Jingcheng Liu,Jiancheng Cao,Zhen Zhou,Ren Liu,Yan Yuan,Xiaoya Liu
Two series of ultraviolet (UV)-cured self-healing polyurethane (PU) oligomers were synthesized through a prepolymer process from isophorone diisocyanate (IPDI) or 1,6-hexamethylene diisocyanate (HDI), polycarbonate diol (PCDL) of varying molecular weight (500, 1000, and 2000 Da), and chemically modified cyclotriphosphazene as hard cores were introduced. The synthesized oligomers contained rigid aromatic rings as “hard cores” and long fatty chains as “flexible arms”. Nuclear magnetic resonance spectrometer (H NMR) and Fourier transform infrared spectroscopy were used to characterize the structures of the oligomers. In addition, the UV-cured self-healing PU coatings were prepared by designing some coating formulations with the PU oligomers. The self-healing properties and mechanical properties of the UV-cured coatings were investigated. The results revealed that the coatings had self-healing properties based on hydrogen bonds. As the molecular weight of PCDL decreased, the coatings exhibited increased hardness, tensile strength, and glass transition temperature. Furthermore, the coatings exhibited excellent thermostability. The results proved the application prospects of the self-healing coatings with high repair efficiency and excellent mechanical properties.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 26
·13749-13757
·
IF 7.443
Huan Yi,Yu Yang,Xiaoyu Gu,Jian Huang,Chaoyang Wang
Multilayer composite microcapsules, richly and efficiently loaded with a healing reagent (isophorone diisocyanate, IPDI), are prepared based on lignin nanoparticle-stabilized oil-in-water (O/W) Pickering emulsion templates. Size control of the microcapsules is conducted by varying the lignin content and the oil–water volume ratios of the Pickering emulsions. Using scanning electron microscopy (SEM) and optical microscopy (OM), the resulting microcapsules were shown to be spherical in shape, with an ideal structure of a rough outer surface and a smooth inner surface, and a shell thickness of 4.5 μm and a mean diameter of 40–117 μm. Fourier transform infrared (FTIR) spectra and thermal gravimetric analysis (TGA) reveal the extraordinary characteristics of the capsules: a core fraction of 81.1 wt%, excellent thermal stability with the initial evaporating temperature of IPDI elevated by 72 °C, and high durability in aqueous solution-submersion and air-exposure tests with a mass loss of about 9.7 wt% after four days submersion or two weeks exposure. Furthermore, the microcapsules are embedded into epoxy coatings to apply this technology to anticorrosive polymer coatings. Investigations by brine-submersion corrosion-accelerating tests demonstrate that the self-healing microcapsules incorporated into the epoxy coatings on steel plates are well dispersed in the coating and have a favourable anticorrosive effect.
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 Applied Materials & Interfaces
·
2021
·
IF 9.229
Changyue Xu,Zhuo Chen,Chaoxia Wang,Kunlin Chen
By designing and preparing multifunctional materials exhibiting self-healing ability, problems related to their durability outdoors can be solved. This study, inspired by the self-healing mechanism of natural creatures, successfully prepared a dual self-healing multifunctional coating using temperature stimuli-responsive multicompartment microcapsules. Phase change materials (PCMs) were employed to load multicompartment microcapsules that were produced through Pickering emulsion polymerization by applying hydrophobic materials encapsulated by titanium dioxide (TiO2) nanocapsules as Pickering emulsifiers. The multifunctional coating produced using microcapsules and self-healing waterborne polyurethane (WPU) exhibited thermal insulation and antireflection properties, which was attributed to the application of PCMs and TiO2, and it also achieved remarkable superhydrophobicity. Moreover, this coating exhibited the intrinsic and superficial dual self-healing ability, which was attributed to the release of hydrophobic materials from microcapsules and the self-healing ability of WPU. This study can be referenced to guide the fabrication of high-performance self-healing materials, and it can contribute to the long-term use of multifunctional coatings.
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
危险品化学品经营许可证（带存储）