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Li H, Wang X. Preparation of microcapsules with IPDI monomer and isocyanate prepolymer as self-healing agent and their application in self-healing materials. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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2
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Steffi AP, Balaji R, Prakash N, Rajesh TP, Ethiraj S, Samuel MS, Nadda AK, Chandrasekar N. Incorporation of SiO 2 functionalized gC 3N 4 sheets with TiO 2 nanoparticles to enhance the anticorrosion performance of metal specimens in aggressive Cl - environment. CHEMOSPHERE 2022; 290:133332. [PMID: 34922970 DOI: 10.1016/j.chemosphere.2021.133332] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/29/2021] [Accepted: 12/14/2021] [Indexed: 06/14/2023]
Abstract
Nowadays, carbon-based nano-structured materials are widely preferred for composite coating as anti-corrosive reinforcement mainly due to its enhanced physical, chemical and mechanical properties. Herein we develop highly efficient Graphitic carbon nitride-Silica-Titania (gC3N4/SiO2/TiO2) ternary nanocomposite are synthesized and it is used as a nanofillers in the corrosive protection layer on the proposed metal specimen (i.e., mild steel specimen) in an aggressive chloride environment. Size, structural and morphological analysis were analysed for the confirmation of presence of particles. gC3N4 is currently earning quite drastic attention, owing to its affordable cost compared to carbon nanotubes and other carbon-based materials, when gC3N4 incorporated with SiO2 and TiO2, the composite matrix greatly improves the mechanical strength of the coating mixture. XRD, XPS, EDS analysis projects excellent formation and presence of the ternary nanocomposites. The particles are well-dispersed in epoxy and organic resin and deposited on the mildsteel panels and it is examined using various surface and structural characterization techniques. The obtained results are very encouraging and the ternary composite coatings can be recommended for real world applications.
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Affiliation(s)
- Alexander Pinky Steffi
- Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore, Tamil Nadu, India
| | - Ramachandran Balaji
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 106, Taiwan
| | - Natarajan Prakash
- Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore, Tamil Nadu, India
| | | | - Selvarajan Ethiraj
- Department of Genetic Engineering, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, Tamil Nadu, India
| | - Melvin S Samuel
- Department of Material Science and Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - Ashok Kumar Nadda
- Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, Solan, 173 234, India
| | - Narendhar Chandrasekar
- Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore, Tamil Nadu, India.
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3
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Allahdini A, Jafari R, Momen G. Development of a dual capsule self‐healing silicone composite using silicone chemistry and poly(melamine‐urea‐formaldehyde) shells. J Appl Polym Sci 2022. [DOI: 10.1002/app.51670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anahita Allahdini
- Department of Applied Sciences University of Quebec in Chicoutimi (UQAC) Chicoutimi Québec Canada
| | - Reza Jafari
- Department of Applied Sciences University of Quebec in Chicoutimi (UQAC) Chicoutimi Québec Canada
| | - Gelareh Momen
- Department of Applied Sciences University of Quebec in Chicoutimi (UQAC) Chicoutimi Québec Canada
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4
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Santos ANB, Santos DJD, Carastan DJ. Microencapsulation of reactive isocyanates for application in self-healing materials: a review. J Microencapsul 2021; 38:338-356. [PMID: 33938373 DOI: 10.1080/02652048.2021.1921068] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Microencapsulation of curing agents is a major strategy for the development of self-healing polymers. Isocyanates are among the most promising compounds for the development of one-part, catalyst free, self-healing materials, but their microencapsulation is challenging due to their high reactivity. To keep the healing agent intact in the liquid state and containing free-NCO groups, the monitoring of several synthesis parameters is essential. This review aims to summarise the outcomes in the microencapsulation of isocyanates, emphasising the efforts reported in the literature to modulate the microcapsule properties. In this regard, the main synthesis procedures are presented, followed by the most relevant characterisation methods used to assess microcapsule properties. The correlation between these properties and synthesis parameters is also discussed, and finally the main potential and challenges for industrial applications are highlighted.
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Affiliation(s)
- Amanda N B Santos
- Nanoscience and Advanced Materials Graduate Program (PPG-Nano), Federal University of ABC (UFABC), Santo André, Brazil
| | - Demetrio J Dos Santos
- Nanoscience and Advanced Materials Graduate Program (PPG-Nano), Federal University of ABC (UFABC), Santo André, Brazil.,Material Science and Engineering Graduate Program (PPG-CEM), Federal University of ABC (UFABC), Santo André, Brazil
| | - Danilo J Carastan
- Nanoscience and Advanced Materials Graduate Program (PPG-Nano), Federal University of ABC (UFABC), Santo André, Brazil.,Material Science and Engineering Graduate Program (PPG-CEM), Federal University of ABC (UFABC), Santo André, Brazil
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Malekkhouyan R, Neisiany RE, Khorasani SN, Das O, Berto F, Ramakrishna S. The influence of size and healing content on the performance of extrinsic self‐healing coatings. J Appl Polym Sci 2021. [DOI: 10.1002/app.49964] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Roya Malekkhouyan
- Department of Chemical Engineering Isfahan University of Technology Isfahan Iran
| | - Rasoul Esmaeely Neisiany
- Department of Materials and Polymer Engineering, Faculty of Engineering Hakim Sabzevari University Sabzevar Iran
| | | | - Oisik Das
- Department of Engineering Sciences and Mathematics Luleå University of Technology Luleå Sweden
| | - Filippo Berto
- Department of Mechanical and Industrial Engineering Norwegian University of Science and Technology NTNU Trondheim Norway
| | - Seeram Ramakrishna
- Department of Mechanical Engineering National University of Singapore Singapore Singapore
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6
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Jiang H, Cheng M, Ai C, Meng F, Mou Y, Sun S, Li C, Hu S. Surface modified halloysite nanotube enhanced imine-based epoxy composites with high self-healing efficiency and excellent mechanical properties. Polym Chem 2021. [DOI: 10.1039/d1py00715g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(a) Schematic diagram of the self-healing mechanism. (b) Illustration of the cross-linking effect and the internal molecular structure.
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Affiliation(s)
- Hao Jiang
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Meng Cheng
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Caijiao Ai
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Fanjie Meng
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Yizeng Mou
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Shuangqing Sun
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao 266580, China
| | - Chunling Li
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao 266580, China
| | - Songqing Hu
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
- Institute of Advanced Materials, China University of Petroleum (East China), Qingdao 266580, China
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Marques AC, Mocanu A, Tomić NZ, Balos S, Stammen E, Lundevall A, Abrahami ST, Günther R, de Kok JMM, Teixeira de Freitas S. Review on Adhesives and Surface Treatments for Structural Applications: Recent Developments on Sustainability and Implementation for Metal and Composite Substrates. MATERIALS 2020; 13:ma13245590. [PMID: 33302442 PMCID: PMC7763528 DOI: 10.3390/ma13245590] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/01/2020] [Accepted: 12/03/2020] [Indexed: 11/21/2022]
Abstract
Using adhesives for connection technology has many benefits. It is cost-efficient, fast, and allows homogeneous stress distribution between the bonded surfaces. This paper gives an overview on the current state of knowledge regarding the technologically important area of adhesive materials, as well as on emergent related technologies. It is expected to fill some of the technological gaps between the existing literature and industrial reality, by focusing at opportunities and challenges in the adhesives sector, on sustainable and eco-friendly chemistries that enable bio-derived adhesives, recycling and debonding, as well as giving a brief overview on the surface treatment approaches involved in the adhesive application process, with major focus on metal and polymer matrix composites. Finally, some thoughts on the connection between research and development (R&D) efforts, industry standards and regulatory aspects are given. It contributes to bridge the gap between industry and research institutes/academy. Examples from the aeronautics industry are often used since many technological advances in this industry are innovation precursors for other industries. This paper is mainly addressed to chemists, materials scientists, materials engineers, and decision-makers.
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Affiliation(s)
- Ana C. Marques
- CERENA, DEQ, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal;
| | - Alexandra Mocanu
- Faculty of Applied Chemistry and Materials Science, University POLITEHNICA of Bucharest, 1-7 Gh. Polizu, 011061 Bucharest, Romania;
| | - Nataša Z. Tomić
- Innovation Center of Faculty of Technology and Metallurgy, Belgrade Ltd., Karnegijeva 4, 11000 Belgrade, Serbia;
| | - Sebastian Balos
- Department of Production Engineering, Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia;
| | - Elisabeth Stammen
- Department Adhesive Bonding, Institute of Joining and Welding, Technische Universität Braunschweig, Langer Kamp 8, D-38106 Braunschweig, Germany;
| | - Asa Lundevall
- RISE IVF AB, Lindholmspiren 7 A, 417 56 Göteborg, Sweden;
| | - Shoshan T. Abrahami
- Research Group Electrochemical and Surface Engineering (SURF), Department of Materials and Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium;
| | - Roman Günther
- Laboratory of Adhesives and Polymer Materials, Institute of Materials and Process Engineering, Zurich University of Applied Sciences, Technikumstrasse 9, 8401 Winterthur, Switzerland;
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093 Zurich, Switzerland
| | - John M. M. de Kok
- GKN Fokker Aerostructures BV, Industrieweg 4, 3351 LB Papendrecht, The Netherlands;
| | - Sofia Teixeira de Freitas
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
- Correspondence:
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Healing Performance of a Self-Healing Protective Coating According to Damage Width. COATINGS 2020. [DOI: 10.3390/coatings10060543] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Although self-healing protective coatings have been widely studied, systematic research on healing performance of the coating according to damage width has been rare. In addition, there has been rare reports of self-healing of the protective coating having damage width wider than 100 µm. In this study, self-healing performance of a microcapsule type self-healing protective coating on cement mortar was studied for the coating with damage width of 100–300 µm. The effect of capsule-loading (20 wt%, 30 wt% and 40 wt%), capsule size (65-, 102- and 135-µm-mean diameter) and coating thickness (50-, 80- and 100-µm-thick undercoating) on healing efficiency was investigated by water sorptivity test. Accelerated carbonation test, chloride ion penetration test and scanning electron microscope (SEM) study were conducted for the self-healing coating with a 300-µm-wide damage. Healing efficiency of the self-healing coating decreased with increasing damage width. As capsule-loading, capsule size or coating thickness increased, healing efficiency of the self-healing coating increased. Healing efficiency of 76% or higher was achieved using the self-healing coating with a 300-µm-wide scratch. The self-healing coating with a 200-µm-wide crack showed healing efficiency of 70% or higher. The self-healing coating having a 300-µm-wide scratch showed effective protection of the substrate mortar from carbonation and chloride ion penetration, which was supported by SEM study.
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