Self-Healable, Solvent Response Cellulose Nanocrystal/Waterborne Polyurethane Nanocomposites with Encryption Capability

Xue, Rui; Zhao, Hui; An, Ze-Wei; Wu, Wei; Jiang, Yan; Huang, Chongxing; Shi, Dean; Li, Robert K Y; Hu, Guohua; Wang, Shuangfei

doi:10.1021/acsnano.2c11809

Cited by 63 publications

(41 citation statements)

References 52 publications

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Section: Application Of Bspumentioning

confidence: 99%

Recent Advances in Tailored Fabrication and Properties of Biobased Self-Healing Polyurethane

Yu,

An,

Zhang

et al. 2023

Biomacromolecules

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With the emergence of challenges in the environmental degradation and resource scarcity fields, the research of biobased self-healing polyurethane (BSPU) has become a prevailing trend in the technology of the polyurethane industry and a promising direction for developing biomass resources. Here, the production of BSPU from lignocellulose, vegetable oil, chitosan, collagen, and coumarin is classified, and the principles of designing polyurethane based on compelling examples using the latest methods and current research are summarized. Moreover, the impact of biomass materials on self-healing and mechanical properties, as well as the tailored performance method, are presented in detail. Finally, the applications of BSPU in biomedicine, sensors, coatings, etc. are also summarized, and the possible challenges and development prospects are explored to helpfully make progress in the development of BSPU. These findings demonstrate valuable references and practical significance for future BSPU research.

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Section: Application Of Bspumentioning

confidence: 99%

Recent Advances in Tailored Fabrication and Properties of Biobased Self-Healing Polyurethane

Yu,

An,

Zhang

et al. 2023

Biomacromolecules

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“…So, at this moment, the preparation of self-healing sensors is based on the intrinsic healing system. Generally speaking, the dynamic structures required for the preparation of intrinsic healing materials include covalent structures: D−A bonds, 27 SS bonds, 28,29 or ester bonds 30 and noncovalent structures: hydrogen bonds, 31 metal−ligand networks, 32 or macromolecular diffusion systems. Studies have shown that polymers containing dynamic SS bonds can be cross-linked to form rapid healing systems, the required conditions are mild, and some systems can even heal cracks without external stimulation.…”

Section: Characterization Of Healing Propertiesmentioning

confidence: 99%

Self-Healable, Superhydrophobic, and Flexible Strain Sensor Based on Polyurethane Composite for Underwater Sensing

Gao

et al. 2023

ACS Appl. Polym. Mater.

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As one of the most important wearable devices, flexible sensors have attracted the attention of researchers because they can be installed onto the skin of a human to monitor their movement, and they have the advantages of excellent flexibility and comfort. However, most of the devices cannot be used in an underwater environment, and they may be destroyed by mechanical forces in harsh working conditions. There are many approaches to solve these issues, but unfortunately, less research has been carried out to solve them simultaneously. To overcome these challenges, this research proposes a method for developing a sensor integrating superhydrophobicity and self-healing ability. The experimental results demonstrated that the sensor exhibited excellent performance with a water contact angle of 153.6°, a gauge factor of 145, and more than 10 000 cycle stability. In addition, it could self-heal at 50 °C after scratch, and the self-healing efficiency was 85.6%. It was capable of monitoring various movements, such as coughing, speaking, the bending and stretching of knees, elbows, and fingers. Furthermore, this device can be employed to monitor the human movement of swimming, and it can also realize underwater vibration and impact of tiny droplets. This work provides a valuable design strategy for electrical devices that can be widely applied in various fields.

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“…Disulfide bonds have attracted much attention because disulfide exchange can occur at moderate temperatures with the assistance of external stimuli. Polymers containing aliphatic disulfide bonds were reversibly broken and recombined at room temperature under sunlight, , in the presence of water, or after a relatively long healing time (48 h) . However, activation by external stimuli can lead to detrimental side effects, such as discoloring, crazing, bending, and swelling, which can impact the integrity of materials.…”

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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Self-Healable, Solvent Response Cellulose Nanocrystal/Waterborne Polyurethane Nanocomposites with Encryption Capability

Cited by 63 publications

References 52 publications

Recent Advances in Tailored Fabrication and Properties of Biobased Self-Healing Polyurethane

Recent Advances in Tailored Fabrication and Properties of Biobased Self-Healing Polyurethane

Self-Healable, Superhydrophobic, and Flexible Strain Sensor Based on Polyurethane Composite for Underwater Sensing

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

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