ACS Applied Nano Materials
·
2020
·
IF 0
Liujun Song,Jin Hu,Xiaofeng Huang,Li Zhong,Yongbing Pei,Lianbin Wu,Xinya Zhang
Inspired by the compound eye superhydrophobic phenomenon, the hemispherical particles with a concave (HPCs) were prepared and self-assembled into a similar array structure. To improve the roughness and mechanical durability properties, the nanoscale Fe2O3 nanorods modified by 1H,1H,2H,2H-perfluorodecyltriethoxysilane (FSA) were coated on the particles (HPC@Fe2O3) and then the SiO2 particles modified by FSA were deposited onto HPC@Fe2O3 arrays to mimic the nanoscale nipples of a compound eye. The obtained arrays show excellent superhydrophobic properties (the contact angle is 175°, and the sliding angle is 3.5°), which are mainly attributed to the stable micro/nanoscale air-cushion structure’s greatly reduced contact of water drops. After that, the self-healable poly(dimethylsiloxane) (NH2-PDMS) elastomer was introduced as a substrate, and the composite structure can be self-healed in 2 min at room temperature after being damaged, which greatly enhances the lifespan of the superhydrophobic film. This kind of biomimicry material combining the superhydrophobic with the self-healable property has promising applications in artificial skins, wearable devices, and so on.
研究领域:
材料科学
·
仿生学
✓ 已验证
产品关联
DOI
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 21
·8041-8052
·
IF 8.262
ChenDi Ding,Ying Liu,MingDong Wang,Ting Wang,JiaJun Fu
A new type of host–guest feedback active coating was constructed on a magnesium alloy surface by incorporation of “guest” mechanized silica nanoparticles (MSNPs) as smart nanocontainers into a host self-assembled nanophase particle (SNAP) barrier coating. MSNPs, consisting of mesoporous silica nanoparticles and supramolecular nanovalves in the form of pseudorotaxanes, are capable of blocking entrapped corrosion inhibitor, 2-hydroxy-4-methoxy-acetophenone (HMAP), in mesopores under neutral solution conditions, and only release this chemical upon alkali or Mg2+ stimuli that corresponds to environmental stimuli occurring on corroding micro-regions of magnesium alloy. The particular alkali/Mg2+ dual stimuli-responsive release property of the MSNPs endows the physical barrier coating with self-healing potential. Taking advantage of the rough micro/nanostructural surface of the feedback active coating, the superhydrophobic surface was subsequently obtained by modification with 1H,1H,2H,2H-perfluorodecyltriethoxysilane, and the self-healing superhydrophobic coating was successfully fabricated. The well-designed coating exhibited excellent anticorrosion performance when compared to a reference SNAP coating, and isolated magnesium alloy from aggressive attack in 0.05 M NaCl for 15 days due to the water-repellent surface as well as active protection deriving from the MSNPs. Furthermore, once the surface was mechanically scratched, the alkali/Mg2+-triggered release of HMAP from MSNPs formed a compact molecular film on the damaged alloy surface, inhibiting corrosion propagation and executing the self-healing function.
研究领域:
材料科学
·
防腐蚀工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Fei Zhong,Yi He,Pingquan Wang,Chunlin Chen,Youqing Wu
Utilization of self-healing coating is an efficient strategy for protecting metals from corrosion. However, rational design and synthesis of self-healing nanomaterial with excellent barrier property and high loading rate of corrosion inhibitor is still a challenge. Herein, the obvious physical barrier properties of graphene and the self-healing function of zeolite imidazole framework-8 (ZIF-8) was combined (RGO@ZIF) based on the concept of composite coating with "passive barrier" body and "active self-healing" guest. Herein, as a coordination complex, ZIF-8 can store and release inhibitors (2-methylimidazole) through the formation and cleavage of coordination bonds. Moreover, silica was supported on the ZIF surface (RGO@ZIF@SiO 2 ) to compensate for the negative impact of the remaining voids after ZIF decomposition on the barrier properties of the coatings. The UV–vis results proved that ZIF-8 displayed outstanding pH-responsive activities under acidic conditions, and the loading capacity was up to 63.0%. Therefore, ZIF-8 was proposed as a solid corrosion inhibitor, which is expected to provide a new way to improve the loading rate of inhibitors. The EIS results showed that the impedance values of ZIF/EP, RGO@ZIF/EP and RGO@ZIF@SiO 2 /EP composites coatings increased inversely with the prolongation of immersion time, attributing to their self-healing performance. Besides, the epoxy loaded 0.7% of RGO@ZIF@SiO 2 exhibited the higher impedance value than that of other samples in the whole immersion stage, which can be ascribed to the excellent barrier properties. Moreover, the corrosion products and bubbles on the surface of RGO@ZIF@SiO 2 /EP (0.7%) sample were the least after 200 h of exposure in salt spray test , further proving its best corrosion protection performance.
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 LETTERS
·
2022
·
IF 3.574
Fei Yu,Hengyu Feng,Zhen Yan,Xudong Liu,Yu Liu,Linghan Xiao
The self-assembling process was conducted to fabricate graphene oxide microcapsules containing light-curing epoxy resin based on the Pickering emulsions in a single step. The chemical stability of microcapsules was improved through chemical stitching of GO nanosheets with polyether amine, while the content of epoxy resin reaching above 85 wt%. The entire highly-efficient process was energy-efficient, which ended up without barely wastes and residuals. In addition, the self-repairing coatings also produced satisfactory self-healing property and protective effect, due to the fracture of microcapsules and the reactions occurring under UV light irradiation on the surface of hot-dip galvanized steel.
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
·
2021
·
IF 8.067
Chenhao Ren,Yao Huang,Wenkui Hao,Dawei Zhang,Xiejing Luo,Lingwei Ma,Jinke Wang,Thee Chowwanonthapunya,Chaofang Dong,Xiaogang Li
In this study, a new self-healing strategy that can simultaneously recover the corrosion resistance and the adhesion strength of coatings was introduced. The coating was based on a shape memory epoxy resin containing ethylene vinyl acetate (EVA) microspheres loaded with Ce(NO 3 ) 3 inhibitors, and was cured at a relatively high temperature to facilitate the fusion of adjacent microspheres for a strengthened self-healing effect. The electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM) results demonstrated that the shape memory effect of epoxy matrix, the filling of molten EVA microspheres as well as the release of Ce(NO 3 ) 3 inhibitors contributed synergistically to suppress the corrosion reaction at the coating damage. After healing, the low frequency impedance modulus of the coatings containing Ce(NO 3 ) 3 -EVA microspheres was three orders of magnitude higher than that of the blank epoxy coating. The adhesion strength of the coatings containing Ce(NO 3 ) 3 -EVA microspheres on the metal substrate was also largely repaired thanks to the strong bonding effect of the EVA microspheres.
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Yi Huang,Chenyang Zhao,Yue Li,Chen Wang,Tao Shen,Di Cheng,Hui Yang
Zeolitic imidazolate framework-8 (ZIF-8)-based pH-responsive nanocontainers present a new pathway to endowing sol-gel anticorrosion coatings with self-healing ability. The organic nature of the ZIF-8-based nanocontainers, however, makes them less compatible with the inorganic sol-gel coating matrix, thus ineffective in protection against corrosion. In this paper, a novel pH-responsive corrosion inhibitor release system (BTA-ZIF-8@SiO 2 ) based on ZIF-8 for self-healing sol-gel anticorrosion coating was reported. A facile one-step self-assembly procedure was used to create the 1H-benzotriazole (BTA)-encapsulated ZIF-8 core, on which a layer of silica was subsequently coated using a standard sol-gel method. The silica shell can provide better compatibility of the nanocontainers with the sol-gel matrix, thus improving the overall corrosion protection . Characterizations of the BTA-ZIF-8@SiO 2 nanocontainers via X-ray diffraction spectroscopy, Fourier transform infrared spectroscopy , thermogravimetric analysis , Brunauer−Emmett−Teller, scanning electron microscopy/energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy confirmed the successful synthesis of ZIF-8-based nanocontainers with high loading content of BTA and mesoporous SiO 2 shell. Inhibitor release studies revealed the pH-responsive smart release of inbuilt BTA at both acidic and alkaline media. The anticorrosion performance of sol-gel coating incorporating the nanocontainers was investigated by electrochemical impedance spectroscopy , scanning Kelvin probe , and salt spray test , and the results indicated that BTA-ZIF-8@SiO 2 could effectively enhance the corrosion protection properties of the coating and exhibit excellent self-healing performance, in which the |Z| 0.01Hz was >2 orders of magnitude higher and coating resistance and oxide layer resistance were >3 orders of magnitude higher than these of pure sol-gel coating after 28 d of immersion. This could be attributed to the synergistic effect of enhanced passive protection, improved nanocontainer compatibility with the sol-gel matrix, and corrosion inhibitor film formed on metal surface .
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
POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Sevilay Dural,Sebnem Camadanlı,Nilhan Kayaman Apohan
Poly(aspartic ester polyurea) (PAEU) coating systems, which feature an uncatalyzed and solventless reaction, have attracted attention as a more environmentally friendly, nonreactive coating alternative in both academia and industry. In these coatings, achieving optimal performance requires an impeccable combination of aliphatic polyisocyanates and polyaspartic esters used as cross-linking agents. In previous applications, petroleum-based polyisocyanates were used as the second component. In this study, a biobased prepolymer was synthesized as the second component, thus creating a sustainable PAEU coating class without compromising traditional properties. It is known that traditional coatings can become damaged or cracked when exposed to external forces during processing or use. The coatings achieved the self-healing feature by using varying amounts of disulfide to improve this situation. The samples were deliberately damaged and then allowed to heal for 1 h at room temperature, 40°C, and 80°C. The results demonstrated improved mechanical properties in all samples. Tensile strength increased by 79%–95%, and elongation recovery rates ranged from 73% to 97% after 1 h of room-temperature repair. These mechanical test results were consistent with the SEM images for all samples.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yangyang Cao,Zheng Wang,Jieru Wan,Yuzhu He,Yunqiang Li,Sheng Wang,Yanli Wang,Dalei Song,Tao Zhang
Polyelectrolyte-encapsulated nanocontainers can effectively respond to changes of pH and thus control the on-demand release of corrosion inhibitors. A pH-responsive release system (Phen-Tpp@MTNs-PDDA) was developed based on the cationic polyelectrolyte poly dimethyl diallyl ammonium chloride (PDDA) encapsulated mesoporous TiO 2 nanocontainers (MTNs) loaded with 1,10-phenanthroline (Phen) and tripolyphosphate ions (Tpp) corrosion inhibitors. The epoxy coating (EP) embedded with Phen-Tpp@MTNs-PDDA (Phen-Tpp@MTNs-PDDA/EP) demonstrates superior self-healing properties and confers long-term protection on the metal substrate through the cooperative effect of Phen and Tpp. Simultaneously, this hybrid coating is endowed with corrosion sensing capability based on the color development originating from the interaction of Phen and carbon steel. This self-healing and corrosion-sensing multifunctional coating provides an effective strategy for the corrosion protection of metals.
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
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xinzi Zhong,Liyun Cao,Tian Ji,Jianfeng Huang,Yijun Liu,Xuetao Shen,Yong Zhao,Zhiwen Cheng,Ting Liu
Hierarchical design was applied to core-shell B 2 O 3 @SiO 2 microcapsule, followed by fabrication of the SiC–B 2 O 3 @SiO 2 coating by a combination of entrapping and hot dip processes. Among the C/C-SiC-BS2, C/C-SiC-BS4 and C/C-SiC-BS6 samples, the C/C-SiC-BS4 composite exhibits long-term antioxidant capabilities, with only a 2.30 % mass loss as oxidized at 973 K for 1500 h, and 2.35 % at 1073 K for 2600 h. Furthermore, after enduring 150 thermal shocks between 293 K and 1173 K, its mass loss is only 2.07 %. The XRD patterns detected the existence of B 2 O 3 and SiO 2 phases, and the SEM and EDS analysis proved the borosilicate glass , indicating the excellent performances came from the synergistic self-healing effects of the B 2 O 3 , SiO 2 phases, and borosilicate glass . Thus, within the temperature ranges from 873 K to 1273 K, the oxygen penetration shifts from osmotic state to defect diffusion in coating. This research emphasizes the significance of hierarchical designs for core-shell sacrificial phase in silicate coatings, thereby enhancing their long-term applicability.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2016
·
IF 3.897
Chunmei Li,Jiaojun Tan,Junwei Gu,Lei Qiao,Baoliang Zhang,Qiuyu Zhang
We report an efficient and novel method for encapsulation of isophorone diisocyanate (IPDI) in polythioether microcapsules via thiol-ene click reaction based on Pickering emulsion , which has significantly improved and simplified the preparation process. The resultant microcapsules have spherical shapes with a layer of poly(glycidyl methacrylate) (PGMA) particles covering outside. The diameter ranges from 82.1 to 160.8 μm, which is controlled by the concentration of PGMA particles, and the typical shell thickness is about 9 μm. Moreover, the core content is up to 71% by adjusting the adding ratio of core/shell monomers . Remarkably, the microcapsules have excellently environmental stability that only 18% of the core content drops (from 63.2% to 51.8%) after immersion in water for seven days. These microcapsules could keep their integrity and uniformly disperse in acrylate coatings. In addition, they are proved to be a good self-healing candidate for coatings applied in wet environment.
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
SURFACE & COATINGS TECHNOLOGY
·
2022
·
IF 4.865
Juan Du,Zhaolin Wang,Ziming Wei,Jiawei Yao,Haipeng Song
This paper investigated the preparation of new environmental, pH stimulation response nanocontainer enhanced, self-healing, and efficient anti-corrosion coating for aluminum alloy protection. Silane/Ce-ZSM-5 coating with improved morphology was successfully synthesized on aluminum alloy surface, through the new proposed “hydrothermal crystallization - ion exchange - self-assembled seed growth - hot pressing” technology, in which ZSM-5 molecular sieve was served as pH stimulation response nanocontainer. The corrosion resistance and self-healing ability of the coating in 3.5 wt% NaCl solution were further investigated by the combined analysis of SEM, EIS, LEIS , ICP-MS characterization and 3D microscopic observation. The experimental results showed that the prepared silane-Ce-ZSM-5 coatings exhibited excellent corrosion protection and self-healing ability, which was attributed to the pH stimulation release of corrosion inhibitor Ce 3+ when the coatings were damaged. The ZSM-5 zeolites generated Ce(OH) 3 or CeO 2 precipitates to gradually fill the aluminum alloy defects, thus forming a dense protective layer and inhibiting the corrosion activity.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2021
·Vol. 306
·期 9
·2100106
·
IF 4.367
Yue Ma,Yuman Yang,Daruo Cao,Jun Fang,Cheng Zhu,Meng Yang,Liang Fang,Chunhua Lu,Zhongzi Xu
Photothermally induced self-healing coatings are widely reported, while their application scenarios are rarely taken with concern. In addition, there is a need to achieve the balance between good properties and self-healing behaviors for closing the gap between academic research and engineering applications. Here, self-healing composite coatings are designed based on silane-modified epoxy chains with reversible crosslinking points and multifunctional fillers of cerium oxide nanoparticles grown on graphene nanosheets, and their applications are demonstrated for restricted regions. Diglycidyl ether-terminated poly(dimethylsiloxane) is co-polymerized with diglycidylether of bisphenol A with the weight ratio of 1/99–10/90 to achieve surface-tension driven crack closure, while dangling furan groups contribute to reversible crosslinking points via Diels–Alder reaction. Cerium oxide nanoparticles and graphene nanosheets enhance anti-corrosion properties, and graphene nanosheets also act as photothermal fillers. The results show that pencil hardness, polarized resistance, and coating resistance are highly improved via the introduction of multifunctional fillers at 1 and 2 phr. Good thermally and photothermally induced self-healing is demonstrated. This work provides a new application thought for light triggered self-healing coatings that can be used for restricted regions including inner walls of pipelines and reactors.
研究领域:
材料科学
·
防腐蚀工程
✓ 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）