Cephalopods-Inspired Rapid Self-Healing Nanoclay Composite Coatings with Oxygen Barrier and Super-Bubble-Phobic Properties

2021 ◽  
Author(s):  
Kengo Manabe ◽  
Emiko Koyama ◽  
Yasuo Norikane
Keyword(s):  
Composite Coatings ◽  
Oxygen Barrier ◽  
Self Healing

scholarly journals Cephalopods Inspired Rapid Self-Healing Nanoclay Composite Coatings with Oxygen Barrier and Super-Bubble-Phobic Properties

2021 ◽  
Author(s):  
Kengo Manabe ◽  
Yasuo Norikane ◽  
Emiko Koyama
Keyword(s):  
Composite Coatings ◽  
Healing Process ◽  
Polymer Network ◽  
Food Products ◽  
Gas Permeation ◽  
Inorganic Materials ◽  
Oxygen Barrier ◽  
Self Healing ◽  
Oxygen Transmission Rate ◽  
Wall Structures

Polymeric coatings with oxygen barrier properties are an important technology in food packaging that can extend the shelf life of food products and reduce waste. Although a typical technology in practical use is the deposition of metal or inorganic materials between multilayer films to reduce the oxygen transmission rate, once the film is damaged, oxygen permeates through the damaged area, damaging the packaged food. In addition, nanobrick wall structures consisting of nanoplatelet bricks have the potential to replace barrier films made of inorganic materials, however, they similarly lack repair performance or have slow repair speed despite having repair performance. Inspired by the rapid self-repair mechanism of cephalopods, the study develops a nanoclay-containing coating that can rapidly repair surface damage via water. By introducing CaCl<sub>2</sub>-derived counterions and montmorillonite for nanobrick wall structures into polyelectrolyte multilayers stacked by layer-by-layer self-assembly, the non-covalent polymer network is increased, resulting in mimicking a strong cephalopod-derived β-sheet structure and non-covalent intermolecular interactions derived from cephalopods. Regardless of the amount of montmorillonite added, the self-healing process was completed within 10 sec. The high-water retention at the surface showed super-bubble-phobicity in water and inhibited gas permeation. The oxygen permeability of the coatings with more than a certain amount of montmorillonite was less than 1/100 of that of bare polyethylene. The ultra-fast self-healing gas barrier coating has the potential to be used not only for food products but also for electronics and pharmaceutical packaging and gas separation applications. The key technology developed in this study provides novel insights into the construction of self-healing membranes made of composite materials and will contribute to the formation of a sustainable society.

scholarly journals Cephalopods Inspired Rapid Self-Healing Nanoclay Composite Coatings with Oxygen Barrier and Super-Bubble-Phobic Properties

2021 ◽  
Author(s):  
Kengo Manabe ◽  
Yasuo Norikane ◽  
Emiko Koyama
Keyword(s):  
Composite Coatings ◽  
Healing Process ◽  
Polymer Network ◽  
Food Products ◽  
Gas Permeation ◽  
Inorganic Materials ◽  
Oxygen Barrier ◽  
Self Healing ◽  
Oxygen Transmission Rate ◽  
Wall Structures

Polymeric coatings with oxygen barrier properties are an important technology in food packaging that can extend the shelf life of food products and reduce waste. Although a typical technology in practical use is the deposition of metal or inorganic materials between multilayer films to reduce the oxygen transmission rate, once the film is damaged, oxygen permeates through the damaged area, damaging the packaged food. In addition, nanobrick wall structures consisting of nanoplatelet bricks have the potential to replace barrier films made of inorganic materials, however, they similarly lack repair performance or have slow repair speed despite having repair performance. Inspired by the rapid self-repair mechanism of cephalopods, the study develops a nanoclay-containing coating that can rapidly repair surface damage via water. By introducing CaCl<sub>2</sub>-derived counterions and montmorillonite for nanobrick wall structures into polyelectrolyte multilayers stacked by layer-by-layer self-assembly, the non-covalent polymer network is increased, resulting in mimicking a strong cephalopod-derived β-sheet structure and non-covalent intermolecular interactions derived from cephalopods. Regardless of the amount of montmorillonite added, the self-healing process was completed within 10 sec. The high-water retention at the surface showed super-bubble-phobicity in water and inhibited gas permeation. The oxygen permeability of the coatings with more than a certain amount of montmorillonite was less than 1/100 of that of bare polyethylene. The ultra-fast self-healing gas barrier coating has the potential to be used not only for food products but also for electronics and pharmaceutical packaging and gas separation applications. The key technology developed in this study provides novel insights into the construction of self-healing membranes made of composite materials and will contribute to the formation of a sustainable society.

scholarly journals Zn-Co-CeO2 vs. Zn-Co Coatings: Effect of CeO2 Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 704
Author(s):  
Marija Riđošić ◽  
Nebojša D. Nikolić ◽  
Asier Salicio-Paz ◽  
Eva García-Lecina ◽  
Ljiljana S. Živković ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Healing Rate ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Self Healing ◽  
Kelvin Probe ◽  
Artificial Defect ◽  
Volta Potential ◽  
Superior Corrosion Resistance ◽  
The Stability

Electrodeposition and characterization of novel ceria-doped Zn-Co composite coatings was the main goal of this research. Electrodeposited composite coatings were compared to pure Zn-Co coatings obtained under the same conditions. The effect of two ceria sources, powder and home-made sol, on the morphology and corrosion resistance of the composite coatings was determined. During the electrodeposition process the plating solution was successfully agitated in an ultrasound bath. The source of the particles was found to influence the stability and dispersity of plating solutions. The application of ceria sol resulted in an increase of the ceria content in the resulting coating and favored the refinement from cauliflower-like morphology (Zn-Co) to uniform and compact coral-like structure (Zn-Co-CeO2 sol). The corrosion resistance of the composite coatings was enhanced compared to bare Zn-Co as evidenced by electrochemical impedance spectroscopy and scanning Kelvin probe results. Zn-Co doped with ceria particles originating from ceria sol exhibited superior corrosion resistance compared to Zn-Co-CeO2 (powder) coatings. The self-healing rate of artificial defect was calculated based on measured Volta potential difference for which Zn-Co-CeO2 (sol) coatings exhibited a self-healing rate of 73.28% in a chloride-rich environment.

Encapsulation of linseed oil in graphene oxide shells for preparation of self-healing composite coatings

2019 ◽  
Vol 129 ◽  
pp. 285-291 ◽  
Author(s):  
Jing Li ◽  
Zhenwei Li ◽  
Qingkang Feng ◽  
Hanxun Qiu ◽  
Guangzhi Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Linseed Oil ◽  
Composite Coatings ◽  
Self Healing

scholarly journals Cellulose microfibers (CMFs) reinforced smart self-healing polymeric composite coatings for corrosion protection of steel

2020 ◽  
Author(s):  
Muddasir Nawaz ◽  
Sehrish Habib ◽  
Adnan Khan ◽  
Abdul Shakoor ◽  
Ramazan Kahraman
Keyword(s):  
Corrosion Resistance ◽  
Immersion Time ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Polymeric Composite ◽  
Protective Film ◽  
Self Healing ◽  
Ph Change ◽  
Smart Coatings ◽  
Cellulose Microfibers

The use of organic coating for the metals has been widely being used to protect the surface against corrosion. Polymeric coating incorporated with Nanocontainers loaded with inhibitor and self-healing provides better corrosion resistance. Cellulose microfibers (CMFs) used as smart carriers were synthesized and loaded with dodecylamine (DOC)-inhibitor and polyethyleneimine (PEI)-both inhibitor and self-healing agents. Smart polymeric coatings were developed by mixing CMF/DOC and CMFs/PEI into the epoxy matrix. Reference coatings (that has only CMFs) were also prepared for a compersion. Scanning electron microscope (SEM), X-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FTIR) and thermal gravitational analysis (TGA) were used to confirm the loading of DOC and PEI onto the CMFs. UV-vis analysis indicates that the self-release of inhibitor from CMFs is sensitive to pH of the solution and the immersion time. Recovery of controlled surface damage confirms the decent self-healing ability of the prepared smart coatings is due to the efficient release of inhibitor (DOC) and self-healing agent (PEI) in the damaged area leading to the formation of a protective film. Electrochemical impedance spectroscopy (EIS) results demonstrate that corrosion resistance of the smart coating increases with an increase in immersion time which is due to the progressive release of inhibitors from CMFs in response to the pH change. Therefore, smart coatings demonstrate superior properties as compared to the reference coatings. The study reveals the polymeric composite coatings have potential to inhibit the corrosion of steel for oil and gas industry.

Inhibitor-Containing Composite Coatings on Mg Alloys: Corrosion Mechanism and Self-Healing Protection

2015 ◽  
Vol 245 ◽  
pp. 89-96 ◽  
Author(s):  
Andrey S. Gnedenkov ◽  
Sergey L. Sinebryukhov ◽  
Dmitry V. Mashtalyar ◽  
Sergey V. Gnedenkov
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Composite Coatings ◽  
Healing Process ◽  
Corrosion Mechanism ◽  
Self Healing ◽  
Protective Properties ◽  
Oxidation Method ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Electrode Technique

The way of self-healing coating formation at the surface of magnesium alloys by means of plasma electrolytic oxidation method (PEO) with subsequent filling of the obtained layer with inhibitor has been suggested. The electrochemical properties of such coatings have been described in details. The obtained experimental results indicate that the protective properties of the samples with inhibitor-containing coating were increased (IC = 8.6×10–8 A/cm2) in comparison with the samples without coating (5.3×10–5 A/cm2) and the base coating obtained by plasma electrolytic oxidation method (PEO) (3.4×10–7 A/cm2). The local scanning electrochemical methods of surface investigation, notably Scanning Vibrating Electrode Technique (SVET) and Scanning Ion-Selective Electrode Technique (SIET) were used for determining the kinetics and mechanism of the self-healing process. The treatment by the solution containing 8-hydroxyquinoline, which inhibits the corrosion process, enables one to increase the protective properties of the composite coating in 30 times in the corrosion-active environment in comparison with the base PEO-coating and avert the intensive destruction of the material.

Transparent Surfactant/Epoxy Composite Coatings with Self‐Healing and Superhydrophilic Properties

2019 ◽  
Vol 304 (7) ◽  
pp. 1800765 ◽  
Author(s):  
Wei Li ◽  
Gang Wu ◽  
Jinhui Tan ◽  
Xufeng Yu ◽  
Gang Sun ◽  
...  
Keyword(s):  
Epoxy Composite ◽  
Composite Coatings ◽  
Self Healing

Humidity-triggered self-healing films with excellent oxygen barrier performance

2014 ◽  
Vol 50 (54) ◽  
pp. 7136 ◽  
Author(s):  
Yibo Dou ◽  
Awu Zhou ◽  
Ting Pan ◽  
Jingbin Han ◽  
Min Wei ◽  
...  
Keyword(s):  
Oxygen Barrier ◽  
Self Healing ◽  
Barrier Performance

scholarly journals Ni/cerium Molybdenum Oxide Hydrate Microflakes Composite Coatings Electrodeposited from Choline Chloride: Ethylene Glycol Deep Eutectic Solvent

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 924 ◽  
Author(s):  
Juliusz Winiarski ◽  
Anna Niciejewska ◽  
Jacek Ryl ◽  
Kazimierz Darowicki ◽  
Sylwia Baśladyńska ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Composite Coating ◽  
Molybdenum Oxide ◽  
Composite Coatings ◽  
Choline Chloride ◽  
Active Form ◽  
Deep Eutectic Solvent ◽  
Corrosion Process ◽  
Self Healing ◽  
Oxide Hydrate

Cerium molybdenum oxide hydrate microflakes are codeposited with nickel from a deep eutectic solvent-based bath. During seven days of exposure in 0.05 M NaCl solution, the corrosion resistance of composite coating (Ni/CeMoOxide) is slightly reduced, due to the existence of some microcracks caused by large microflakes. Multielemental analysis of the solution, in which coatings are exposed and the qualitative changes in the surface chemistry (XPS) show selective etching molybdenum from microflakes. The amount of various molybdenum species within the surface of coating nearly completely disappear, due to the corrosion process. Significant amounts of Ce3+ compounds are removed, however the corrosion process is less selective towards the cerium, and the overall cerium chemistry remains unchanged. Initially, blank Ni coatings are covered by NiO and Ni(OH)2 in an atomic ratio of 1:2. After exposure, the amount of Ni(OH)2 increases in relation to NiO (ratio 1:3). For the composite coating, the atomic ratios of both forms of nickel vary from 1:0.8 to 1:1.3. Despite achieving lower corrosion resistance of the composite coating, the applied concept of using micro-flakes, whose skeleton is a system of Ce(III) species and active form are molybdate ions, may be interesting for applications in materials with potential self-healing properties.

scholarly journals Fast Self-Healing of Polyelectrolyte Multilayer Nanocoating and Restoration of Super Oxygen Barrier

2017 ◽  
Vol 38 (10) ◽  
pp. 1700064 ◽  
Author(s):  
Yixuan Song ◽  
Kevin P. Meyers ◽  
Joseph Gerringer ◽  
Ramesh K. Ramakrishnan ◽  
Mohammad Humood ◽  
...  
Keyword(s):  
Oxygen Barrier ◽  
Self Healing ◽  
Polyelectrolyte Multilayer
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