Improvement of scratch resistance in transparent hard surfaces through layer-by-layer coating

Kim, Min Seon; Ahn, Yejin; Kim, Bong‐Gi

doi:10.1016/j.porgcoat.2022.106991

Cited by 4 publications

(1 citation statement)

References 49 publications

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“…Studies have been proposed to prevent microscratches and the loss of optical transparency without affecting the performance of materials. Indeed, fabricating layer-by-layer coatings, , blending of polymers, , embedding nanomaterials (diameter < 100 nm) into a polymer matrix, – and tailoring crystallization of polymers , were utilized to increase hardness and reduce the friction coefficient between the polymer surface and indenter surface, resulting in increased scratch resistance of transparent polymers. However, the aforementioned materials could not be healed after damage.…”

Section: Introductionmentioning

confidence: 99%

Poly(urea-urethane) Elastomers Showing Autonomous Healing at Room Temperature

Mantala,

Crespy

2023

Macromolecules

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Scratches on surfaces caused by abrasion induce the deterioration of the mechanical and optical properties of materials used in wearable electronics, soft robotics, optical lenses, and flexible displays. Ideally, these materials should be able to be autonomously repaired at room temperature without external stimuli. Herein, we report a series of poly(urea-urethane) transparent elastomers containing reversible disulfide and hydrogen bonds with the ability to heal at room temperature. The elastomers display a healing efficiency as high as 95% of mechanical properties, a high relative light transmittance (∼100%), and a complete recovery of light transmittance at 30 °C. The mechanical properties, optical transparency, and self-healing of the light transmittance of the elastomers could be tuned by the molecular design of their soft and dynamic hard segments. This study paves the way for exploring self-healing materials in structures that are difficult to access and for which autonomous healing without external stimuli is suitable.

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