Self-healing UV light-curable resins containing disulfide group: Synthesis and application in UV coatings

Bioinspired self-healing materials are being developed with intrinsic or extrinsic mechanisms. Some materials heal by an external stimulus, such as heat, UV light, pH, electric field and humidity. Hydrogels are among the commonly used materials, which can self-heal by application of an external stimulus. In this study, a self-healing polyacrylamide hydrogel was selected which is known to swell when exposed to water and heal. Silica nanoparticles were added to the hydrogel and a fluorosilane overcoat was used to produce a superliquiphobic surface with a low tilt angle and self-cleaning properties. A fused titania coating on the glass substrate was used to promote adhesion to hydrogel coatings. Hydrogel-based coatings exhibited the ability to repel water and oil, anti-icing properties down to −60°C, self-cleaning, the ability to maintain superliquiphobicity in hot environments up to about 95°C and high wear resistance. The hydrogel-based coating also demonstrated self-healing capability after hydration of a scratched surface. This article is part of the theme issue ‘Bioinspired materials and surfaces for green science and technology (part 2)’.

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UV light triggered self-healing of green epoxy coatings

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.124725 ◽

2021 ◽

Vol 305 ◽

pp. 124725

Author(s):

Harikrishnan Pulikkalparambil ◽

Jyotishkumar Parameswaranpillai ◽

Suchart Siengchin ◽

Jürgen Pionteck

Keyword(s):

Uv Light ◽

Self Healing ◽

Epoxy Coatings

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Laboratory Testing of Self-Healing Polymer Modified Asphalt Mixtures Containing Recycled Asphalt Materials (RAP/RAS)

MATEC Web of Conferences ◽

10.1051/matecconf/201927103003 ◽

2019 ◽

Vol 271 ◽

pp. 03003

Author(s):

Sharareh Shirzad ◽

Marwa M. Hassan ◽

Max A. Aguirre ◽

Samuel Cooper ◽

Louay N. Mohammad ◽

...

Keyword(s):

Uv Light ◽

Light Exposure ◽

Asphalt Mixtures ◽

Self Healing ◽

Test Results ◽

Recycled Asphalt ◽

Cracking Performance ◽

Specimen Test ◽

Low Temperature Cracking ◽

Healing Temperature

The objective of this study was to evaluate the efficiency of an innovative light-induced self-healing polymers in enhancing the durability of asphalt mixtures and improving its self-healing properties. Mixtures were prepared using two different binders, with and without recycled materials, and self-healing polymer. Results showed that the addition of recycled asphalt material to mixtures prepared with an unmodified binder negatively affected the healing recovery at room temperature. Furthermore, Self-healing properties of the mixtures were improved by increasing the healing temperature. The addition of 5% self-healing polymer to the control mixture, followed by UV light exposure resulted in an increase in self-healing properties of the mixtures prepared with PG 67-22 binder. Semi-Circular Bending (SCB) test results showed that the incorporation of self-healing polymer and 48 h of UV light exposure improved the cracking resistance. Loaded-Wheel Test (LWT) results showed that the self-healing polymer caused an increase in the rut depth of the samples prepared with an unmodified binder. However, the final rut depth was less than the acceptable rutting performance. Thermal-Stress Restrained Specimen Test (TSRST) test results showed that self-healing polymer improved the low temperature cracking performance of the mixtures.

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Effects of Light-Activated Self-Healing Polymers on the Rheological Behaviors of Asphalt Binder Containing Recycled Asphalt Shingles

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198118772726 ◽

2018 ◽

Vol 2672 (28) ◽

pp. 301-310 ◽

Cited By ~ 4

Author(s):

Sharareh Shirzad ◽

Marwa M. Hassan ◽

Max A. Aguirre ◽

Samuel Cooper ◽

Ioan I. Negulescu

Keyword(s):

Thermal Stability ◽

Uv Light ◽

Elastic Recovery ◽

Asphalt Binder ◽

Self Healing ◽

Recycled Asphalt ◽

Rheological Behaviors ◽

Recycled Asphalt Shingles ◽

New Generation ◽

Asphalt Shingles

A new generation of ultraviolet (UV) light-activated, self-healing polymers was evaluated with the aim to enhance the elastic recovery of the binder and to increase its self-healing abilities. This study had three main objectives: (a) to develop an optimized synthesis procedure for producing light-activated self-healing polymers, (b) to examine the thermal stability of the prepared self-healing polymers, and (c) to evaluate the effect of self-healing polymers on the rheological properties of asphalt binder containing binder extracted from recycled asphalt shingles (RAS). Fourier transform infrared (FT-IR) spectroscopy analysis confirmed the successful synthesis of UV-activated polymers in the laboratory. In addition, thermogravimetric analysis showed that the materials produced achieved the required thermal stability at high temperature. Measuring the viscosity of different binder blends with and without RAS and with and without self-healing polymers revealed that the additive decreased the viscosity of the binder blends containing RAS, thereby providing blends with a better workability. Furthermore, rheological results showed that the rutting resistance of the binder blends containing RAS was improved by increasing the percentage of self-healing polymer. Results also showed improved rheological behaviors at low service temperature with 5% self-healing polymer and with exposure to UV light.

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Durable Self-Healing Super-Liquid-Repellent Fabrics

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.80.152 ◽

2012 ◽

Vol 80 ◽

pp. 152-155 ◽

Cited By ~ 1

Author(s):

Hong Xia Wang ◽

Hua Zhou ◽

Tong Lin

Keyword(s):

Uv Light ◽

Polyhedral Oligomeric Silsesquioxane ◽

Self Healing ◽

Coating Solution ◽

Wet Chemistry ◽

Coating Technique ◽

Oligomeric Silsesquioxane

In this study, fabrics having a superhydrophobic and superoleophobic surface were prepared by a wet-chemistry coating technique using a coating solution containing hydrolyzed fluorinated alkyl silane and fluorinated-alkyl polyhedral oligomeric silsesquioxane. The coating shows remarkable self-healing superhydrophobic and superoleophobic properties and excellent durability against UV light, acid, repeated machine washes, and severe abrasion.

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Tough and Self-Healable Nanocomposite Hydrogels for Repeatable Water Treatment

Polymers ◽

10.3390/polym10080880 ◽

2018 ◽

Vol 10 (8) ◽

pp. 880 ◽

Cited By ~ 5

Author(s):

Kunhao Yu ◽

Di Wang ◽

Qiming Wang

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Heavy Metal Ions ◽

Dye Degradation ◽

Uv Light ◽

Polymer Network ◽

Polymer Chains ◽

Self Healing ◽

Nanocomposite Hydrogel ◽

Water Stream

Nanomaterials with ultrahigh specific surface areas are promising adsorbents for water-pollutants such as dyes and heavy metal ions. However, an ongoing challenge is that the dispersed nanomaterials can easily flow into the water stream and induce secondary pollution. To address this challenge, we employed nanomaterials to bridge hydrogel networks to form a nanocomposite hydrogel as an alternative water-pollutant adsorbent. While most of the existing hydrogels that are used to treat wastewater are weak and non-healable, we present a tough TiO2 nanocomposite hydrogel that can be activated by ultraviolet (UV) light to demonstrate highly efficient self-healing, heavy metal adsorption, and repeatable dye degradation. The high toughness of the nanocomposite hydrogel is induced by the sequential detachment of polymer chains from the nanoparticle crosslinkers to dissipate the stored strain energy within the polymer network. The self-healing behavior is enabled by the UV-assisted rebinding of the reversible bonds between the polymer chains and nanoparticle surfaces. Also, the UV-induced free radicals on the TiO2 nanoparticle can facilitate the binding of heavy metal ions and repeated degradation of dye molecules. We expect this self-healable, photo-responsive, tough hydrogel to open various avenues for resilient and reusable wastewater treatment materials.

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UV Light Curable Self-Healing Superamphiphobic Coatings by Photopromoted Disulfide Exchange Reaction

ACS Applied Polymer Materials ◽

10.1021/acsapm.9b00656 ◽

2019 ◽

Vol 1 (11) ◽

pp. 2951-2960 ◽

Cited By ~ 3

Author(s):

Dongli Zhao ◽

Zhukang Du ◽

Shanshan Liu ◽

Yefei Wu ◽

Tao Guan ◽

...

Keyword(s):

Exchange Reaction ◽

Uv Light ◽

Self Healing ◽

Disulfide Exchange

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Microcapsule-Type Self-Healing Protective Coating That Can Maintain Its Healed State upon Crack Expansion

Materials ◽

10.3390/ma14206198 ◽

2021 ◽

Vol 14 (20) ◽

pp. 6198

Author(s):

Ji-Sun Lee ◽

Hyun-Woo Kim ◽

Jun-Seo Lee ◽

Hyun-Soo An ◽

Chan-Moon Chung

Keyword(s):

Crack Width ◽

Uv Light ◽

Testing Machine ◽

Coating System ◽

Self Healing ◽

Healing Efficiency ◽

Mean Width ◽

Healing Agent ◽

Water Sorptivity ◽

Coating Formulation

The purpose of this study was to develop a microcapsule-type self-healing coating system that could self-heal cracks and then maintain the healed state even upon crack expansion. Mixtures consisting of a photoinitiator and two methacrylate components, bismethacryloxypropyl-terminated polydimethylsiloxane (BMT-PDMS) and monomethacryloxypropyl-terminated PDMS (MMT-PDMS), were transformed into viscoelastic semi-solids through photoreaction. The viscoelasticity of the reacted mixtures could be controlled by varying the mass ratio of the two methacrylates. Through a stretchability test, the optimal composition mixture was chosen as a healing agent. Microcapsules loaded with the healing agent were prepared and dispersed in a commercial undercoating to obtain a self-healing coating formulation. The formulation was applied onto mortar specimens, and then cracks were generated in the coating by using a universal testing machine (UTM). Cracks with around a 150-μm mean width were generated and were allowed to self-heal under UV light. Then, the cracks were expanded up to 650 μm in width. By conducting a water sorptivity test at each expanded crack width, the self-healing efficiency and capability of maintaining the healed state were evaluated. The B-M-1.5-1-based coating showed a healing efficiency of 90% at a 150-μm crack width and maintained its healing efficiency (about 80%) up to a 350-μm crack width. This self-healing coating system is promising for the protection of structural materials that can undergo crack formation and expansion.

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