Self-healing Corrosion Protective Coating Using Cellulose Nanofibers

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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Sunlight-Induced Self-Healing of a Microcapsule-Type Protective Coating

ACS Applied Materials & Interfaces ◽

10.1021/am302728m ◽

2013 ◽

Vol 5 (4) ◽

pp. 1378-1384 ◽

Cited By ~ 109

Author(s):

Young-Kyu Song ◽

Ye-Hyun Jo ◽

Ye-Ji Lim ◽

Sung-Youl Cho ◽

Hwan-Chul Yu ◽

...

Keyword(s):

Protective Coating ◽

Self Healing

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New Powdered Silicide Materials for Thermal Spraying Process and Coatings on the Niobium Base Alloys

Thermal Spray 1998: Proceedings from the International Thermal Spray Conference ◽

10.31399/asm.cp.itsc1998p1167 ◽

1998 ◽

Author(s):

V. Terentieva ◽

O. Bogatchkova ◽

D. Cornu

Keyword(s):

Protective Coating ◽

Protective Coatings ◽

Thermal Spraying ◽

Base Material ◽

Theory And Practice ◽

Powder Materials ◽

Self Healing ◽

High Enthalpy ◽

Boride Phases ◽

Spraying Process

Abstract The given article presents some results of the scientific research devoted to the development of a new class of scale-resistant powder materials of the Si-Ti-Mo-B system for thermal spraying and using these materials for the creation of heat-resistant coatings on the niobium base alloys by means of various methods of thermal spraying. Also under consideration are problems relating to the theory and practice of obtaining reliable protective coatings on high-melting metals and their alloys, niobium ones included, intended for operation in high-enthalpy oxygen-containing gas flows. Hazard in commencing an oxidation reaction of the base material under coating is connected with density of open pores and cracks, and partial pressure of the oxidizer. Powdered multicomponent heterophase materials for gas-thermal spraying of protective coating with a self-healing ability and controlled properties are proposed. Finally the results of some properties of new silicide-type heterophase powders containing silicide and boride phases for a thermal spraying process and some properties of protective coating deposited on the niobium base alloys by means of a thermal spraying technique are presented.

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Protective coating of strawberries with cellulose nanofibers

Carbohydrate Polymers ◽

10.1016/j.carbpol.2021.117688 ◽

2021 ◽

Vol 258 ◽

pp. 117688

Author(s):

Hojung Kwak ◽

Sungchul Shin ◽

Jaehwan Kim ◽

Joonggon Kim ◽

Donghan Lee ◽

...

Keyword(s):

Protective Coating ◽

Cellulose Nanofibers

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Highly Stretchable and Self-Healing Strain Sensors Based on Nanocellulose-Supported Graphene Dispersed in Electro-Conductive Hydrogels

Nanomaterials ◽

10.3390/nano9070937 ◽

2019 ◽

Vol 9 (7) ◽

pp. 937 ◽

Cited By ~ 29

Author(s):

Chunxiao Zheng ◽

Yiying Yue ◽

Lu Gan ◽

Xinwu Xu ◽

Changtong Mei ◽

...

Keyword(s):

Vinyl Alcohol ◽

Cellulose Nanofibers ◽

Strain Sensors ◽

Gauge Factor ◽

Poly Vinyl Alcohol ◽

Self Healing ◽

Composite Gels ◽

Highly Stretchable ◽

Conductive Hydrogels ◽

Pva Hydrogel

Intrinsic self-healing and highly stretchable electro-conductive hydrogels demonstrate wide-ranging utilization in intelligent electronic skin. Herein, we propose a new class of strain sensors prepared by cellulose nanofibers (CNFs) and graphene (GN) co-incorporated poly (vinyl alcohol)-borax (GN-CNF@PVA) hydrogel. The borax can reversibly and dynamically associate with poly (vinyl alcohol) (PVA) and GN-CNF nanocomplexes as a cross-linking agent, providing a tough and flexible network with the hydrogels. CNFs act as a bio-template and dispersant to support GN to create homogeneous GN-CNF aqueous dispersion, endowing the GN-CNF@PVA gels with promoted mechanical flexibility, strength and good conductivity. The resulting composite gels have high stretchability (break-up elongation up to 1000%), excellent viscoelasticity (storage modulus up to 3.7 kPa), rapid self-healing ability (20 s) and high healing efficiency (97.7 ± 1.2%). Due to effective electric pathways provided by GN-CNF nanocomplexes, the strain sensors integrated by GN-CNF@PVA hydrogel with good responsiveness, stability and repeatability can efficiently identify and monitor the various human motions with the gauge factor (GF) of about 3.8, showing promising applications in the field of wearable sensing devices.

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Low-Temperature Self-Healing of a Microcapsule-Type Protective Coating

Materials ◽

10.3390/ma10091079 ◽

2017 ◽

Vol 10 (9) ◽

pp. 1079 ◽

Cited By ~ 9

Author(s):

◽

...

Keyword(s):

Low Temperature ◽

Protective Coating ◽

Self Healing

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Actual trends in the elaboration of advanced multifunctional coating systems for the efficient protection of lightweight aircraft alloys

Corrosion Reviews ◽

10.1515/corrrev-2017-0026 ◽

2017 ◽

Vol 35 (6) ◽

pp. 383-396 ◽

Cited By ~ 2

Author(s):

Stephan V. Kozhukharov ◽

Vassil I. Samichkov ◽

Christian A. Girginov ◽

Maria S. Machkova

Keyword(s):

Corrosion Protection ◽

Protective Coating ◽

High Performance ◽

Self Healing ◽

Marine Vehicles ◽

Hydrophobic Compounds ◽

Efficient Protection ◽

Recent Trends ◽

Aircraft Alloys ◽

Aluminum And Magnesium Alloys

AbstractOne of the pillars of developed economics is modern transport, where there is always a high demand for the elaboration of lightweight efficient vehicles and transport facilities. Aluminum and magnesium alloys encounter continuously increasing applications in high-performance aircraft, automobile, and marine vehicles. Various advanced multilayered corrosion protective coating systems have recently been proposed to provide a reliable long-term corrosion protection combined with a number of supplemental beneficial properties. The present brief review is an attempt to summarize the basic trends and concepts regarding the elaboration of environmentally friendly multilayered and multifunctional corrosion protective coating systems. Our work summarizes these recent trends, including recently accepted environmental requirements. We have also distinguished the concepts for active and passive corrosion protection capabilities. The basic approach for the achievement of efficient active corrosion protection properties are outlined with suitable examples, such as inhibitor incorporation into ceramic or carbon nanoparticles, encapsulation of active self-healing compounds, reinforcing phase involvement and coating, finished by ultraviolet absorbers and hydrophobic compounds. As a main result, an entire conceptual model has been proposed based on the state-of-the-art analysis.

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