The self-healing property of silicone rubber after degraded by treeing

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.

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Self-Healing Hydrogels with both LCST and UCST through Cross-Linking Induced Thermo-Response

Polymers ◽

10.3390/polym11030490 ◽

2019 ◽

Vol 11 (3) ◽

pp. 490 ◽

Cited By ~ 3

Author(s):

Haifeng Zhao ◽

Heng An ◽

Baozhong Xi ◽

Yan Yang ◽

Jianglei Qin ◽

...

Keyword(s):

Sol Gel ◽

Covalent Bond ◽

The Self ◽

Solution Temperature ◽

Cross Linking ◽

Self Healing ◽

Critical Solution Temperature ◽

Upper Critical Solution Temperature ◽

Healing Property ◽

Sol Gel Transition

Self-healing hydrogels have drawngreat attention in the past decade since the self-healing property is one of the characteristics of living creatures. In this study, poly(acrylamide-stat-diacetone acrylamide) P(AM-stat-DAA) with a pendant ketone group was synthesized from easy accessible monomers, and thermo-responsive self-healing hydrogels were prepared through a series of diacylhydrazide compounds cross-linking without any additional stimulus. Although the copolymers do not show thermo-response, the hydrogels became thermo-responsive andboth the lower critical solution temperature (LCST) and upper critical solution temperature (UCST) varied with the composition of the copolymer and structure of cross-linkers. With a dynamic covalent bond connection, the hydrogel showed gel-sol-gel transition triggered by acidity, redox, and ketone to acylhydrazide group ratios. This is another interesting cross-linking induced thermo-responsive (CIT) hydrogel with different properties compared to PNIPAM-based thermo-responsive hydrogels. The self-healing hydrogel with CIT properties could have great potential for application in areas related to bioscience, life simulation, and temperature switching.

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Multi-stimuli responsive self-healing metallo-hydrogels: tuning of the gel recovery property

Chemical Communications ◽

10.1039/c3cc48896a ◽

2014 ◽

Vol 50 (18) ◽

pp. 2356-2359 ◽

Cited By ~ 150

Author(s):

Shibaji Basak ◽

Jayanta Nanda ◽

Arindam Banerjee

Keyword(s):

Chain Length ◽

The Self ◽

Self Healing ◽

Stimuli Responsive ◽

Healing Property

Self-healable, multi-stimuli responsive metallo-hydrogels based on a series of tyrosine containing amphiphiles have been discovered. Formation of these metallo-gels is highly selective to Ni2+ ions. Moreover, the self-healing property can be modulated by varying the chain length of the corresponding gelator amphiphiles.

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Analytical study on the self-healing property of Bessel beam

The European Physical Journal D ◽

10.1140/epjd/e2012-30343-6 ◽

2012 ◽

Vol 66 (10) ◽

Cited By ~ 18

Author(s):

X. Chu

Keyword(s):

Analytical Study ◽

Bessel Beam ◽

The Self ◽

Self Healing ◽

Healing Property

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Theoretical study on the self-healing property of cotangent phase modulated RAiGV

10.1117/12.2602865 ◽

2021 ◽

Author(s):

yuanzhong kuang ◽

Kaichen Pi ◽

Baoxing Xiong ◽

Fan Gao ◽

Xiang Zhang ◽

...

Keyword(s):

Theoretical Study ◽

The Self ◽

Self Healing ◽

Healing Property

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Self-Healing UV Curable Acrylate Coatings for Wood Finishing System, Part 1: Impact of the Formulation on Self-Healing Efficiency

Coatings ◽

10.3390/coatings10080770 ◽

2020 ◽

Vol 10 (8) ◽

pp. 770

Author(s):

Chloé Paquet ◽

Thomas Schmitt ◽

Jolanta E. Klemberg-Sapieha ◽

Jean-François Morin ◽

Véronic Landry

Keyword(s):

Mechanical Properties ◽

Scratch Resistance ◽

The Self ◽

Cross Linking ◽

Hydroxyl Groups ◽

Self Healing ◽

Hydrogen Binding ◽

Uv Curable ◽

Wood Flooring ◽

Healing Property

In the wood flooring sector, good surface mechanical properties, such as abrasion and scratch resistance, are prerequisite. Surface wood protection is provided by finishing systems. Despite coating improvement, scratches formation on wood flooring is unavoidable. A new approach to increase service life is to confer the self-healing property to the finishing system. The most common coatings used for prefinished wood flooring are acrylate UV curable 100% solids coatings. They usually have good mechanical properties and high cross-linking density. The objective of this study was to develop and evaluate an intrinsic self-healing formulation, which is applicable to wood flooring. For this purpose, acrylate formulations were developed with monomers and oligomers carrying hydroxyl groups. To meet the requirements of wood application, hardness, and polymerization conversion of coatings were evaluated. König pendulum damping tests provide information on coating hardness and flexibility. Results around 80 oscillations is acceptable for UV curable wood sealer. The chemical composition was studied by FT-IR spectroscopy while dynamical mechanical analysis (DMA) was performed to determine glass transition temperature and cross-linking density. The self-healing behavior was evaluated by gloss and scratch depth measurements. The formulation’s composition impacted the hydrogen binding quantity, the conversion, the Tg and the cross-linking density. The (hydroxyethyl)methacrylate (HEMA) monomer provided self-healing and acrylated allophanate oligomer allowed self-healing and cross-linking. This study demonstrated that it is possible to combine high cross-linking density and self-healing property, using components with low steric hindrance.

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Investigations of Self-Healing Property of Chitosan-Reinforced Epoxy Dye Composite Coatings

Journal of Materials ◽

10.1155/2013/613717 ◽

2013 ◽

Vol 2013 ◽

pp. 1-7 ◽

Cited By ~ 5

Author(s):

Hüsnügül Yılmaz Atay ◽

Leyla Eral Doğan ◽

Erdal Çelik

Keyword(s):

Composite Coatings ◽

Healing Process ◽

Primary Objective ◽

The Self ◽

Self Healing ◽

Application Range ◽

Glass Substrates ◽

Different Types ◽

Healing Property ◽

Different Parts

Chitosan has a very wide application range in different parts of life such as in biomedical and antimicrobial areas. In recent years the self-healing property of chitosan becomes more of an issue. In the study chitosan was used to obtain a self-healing composite material. An epoxy dye was converted to a self-healing coating. Different types of samples were prepared by coating the glass substrates with a polymer matrix reinforced with various amounts of chitosan. The samples were characterized by fourier transform Infrared (FTIR) and scanning electron microscope-energy dispersive spectroscopy (SEM-EDS). In addition, self-healing test was applied as a primary objective of this research. In this respect, the samples were scratched with a very thin pin, and they were analyzed by SEM periodically. It was observed that chitosan-reinforced dyes showed self-healing property. Mechanism of the self-healing process was also scrutinized.

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