Stretchable superhydrophobic fluororubber fabricated by transferring mesh microstructures

Wang, Jiwen; Zhang, Yanbin; He, Qiang

doi:10.1039/d2sm01677j

Cited by 17 publications

(8 citation statements)

References 26 publications

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“…Following this, the internal structure of the hydrogel is capable of self-recovery within a brief time frame, coupled with the presence of an energy dissipation mechanism and fatigue resistance after the initial cycle. These attributes collectively ensure the stability of the strain sensors during practical applications …”

Section: Results and Disscussionmentioning

confidence: 99%

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Highly Stretchable, Fast Self-Healing, Self-Adhesive, and Strain-Sensitive Wearable Sensor Based on Ionic Conductive Hydrogels

Li,

Ren,

Zhang

et al. 2024

Biomacromolecules

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Conductive hydrogels integrate the conductive performance and soft nature, which is like that of human skin. Thus, they are more suitable for the preparation of wearable human-motion sensors. Nevertheless, the integration of outstanding multiple functionalities, such as stretchability, toughness, biocompatibility, self-healing, adhesion, strain sensitivity, and durability, by a simple way is still a huge challenge. Herein, we have developed a multifunctional chitosan/oxidized hyaluronic acid/hydroxypropyl methylcellulose/poly(acrylic acid)/tannic acid/Al 3+ hydrogel (CS/OHA/HPMC/PAA/TA/Al 3+ ) by using a two-step method with hydroxypropyl methylcellulose (HPMC), acrylic acid (AA), tannic acid (TA), chitosan (CS), oxidized hyaluronic acid (OHA), and aluminum chloride hexahydrate (AlCl 3 •6H 2 O). Due to the synergistic effect of dynamic imine bonds between CS and OHA, dynamic metal coordination bonds between Al 3+ and −COOH and/or TA as well as reversible hydrogen, the hydrogel showed excellent tensile property (elongation at break of 3168%) and desirable toughness (0.79 MJ/m 3 ). The mechanical self-healing efficiency can reach 95.5% at 30 min, and the conductivity can recover in 5.2 s at room temperature without stimulation. The favorable attribute of high transparency (98.5% transmittance) facilitates the transmission of the optical signal and enables visualization of the sensor. It also shows good adhesiveness to various materials and is easy to peel off without residue. The resistance of the hydrogel-based sensors shows good electrical conductivity (2.33 S m −1 ), good durability, high sensing sensitivity (GF value of 4.12 under 1600% strain), low detection limit (less than 1%), and short response/recovery time (0.54/0.31 s). It adhered to human skin and monitored human movements such as the bending movements of joints, swallowing, and speaking successfully. Therefore, the obtained multifunctional conductive hydrogel has great potential applications in wearable strain sensors.

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Section: Results and Disscussionmentioning

confidence: 99%

“…These attributes collectively ensure the stability of the strain sensors during practical applications. 39 3.6. Self-Healing Properties of the Hydrogels.…”

Section: Adhesive Performance Of the Hydrogelsmentioning

confidence: 99%

Highly Stretchable, Fast Self-Healing, Self-Adhesive, and Strain-Sensitive Wearable Sensor Based on Ionic Conductive Hydrogels

Li,

Ren,

Zhang

et al. 2024

Biomacromolecules

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“…Semi-quantitatively, we estimate the penetrant hopping diffusion constant by using the Fick's law relationship as done previously, D p = (Dr p ) 2 /6t hop,p . 25,26,57 In the framework of SCCH theory for polymer melts, the penetrant diffusion constant is dominated by the variation of the activated hopping rate (1/t hop,p ) relative to small variations of the jump distance prefactor (Dr p ) 2 (see Fig. S5a, ESI †).…”

Section: B Scch Theory For Shaped Penetrantsmentioning

confidence: 99%

Penetrant shape effects on activated dynamics and selectivity in polymer melts and networks based on self-consistent cooperative hopping theory

Mei,

Schweizer

2023

Soft Matter

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“…Although hierarchical surperhydrophobic surfaces have been rapidly developed, a large number of work focus on sponge, flexible porous coating, such as porous PDMS coating. [23][24][25] The preparation of rigid hierarchical surperhydrophobic coating with high adhesion strength still remains a bid challenge. The anti-icing performance and durability cannot satisfy the requirement of real application.…”

Section: Introductionmentioning

confidence: 99%

Preparation of superhydrophobic asymmetric vitrimer coating with high porosity and the key role of hierarchical pocket structure on long freeze delay time and high durability

Xiong,

Zhang,

Liu

et al. 2024

Polymers for Advanced Techs

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It is still a big challenge to prepare superhydrophobic anti‐icing coatings with long freeze delay performance and high durability. In this work, in different with conventional flexible porous coating, we prepared an asymmetric coating with hierarchical pocket structure by a facile hot‐pressing/salt‐leaching (BHS) method on a polyacrylate vitrimer polymer with mellability. The asymmetric architecture endowed porous coating with low density and high adhesion strength. The in‐situ growth of silica nanoparticles in above porous coating and surface modification generated a superhydrophobic hierarchical pocket structure. As a result, the freezing delay time was drastically increased to 14,400 s at −10°C. Furthermore, owing to hierarchical pocket structure, the coating could maintain its superhydrophobicity and anti‐icing performance under water flow impacting at 10 kPa pressure, 30 cycles of sandpaper abrasion, 50 cycles of tape peeling, showing advantageous high durability. By employing the hierarchical porous coating on heat exchangers, the energy consumption was drastically reduced by 93%.

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Stretchable superhydrophobic fluororubber fabricated by transferring mesh microstructures

Abstract: Stretchable flexible superhydrophobic surfaces are in great demand to achieve waterproofing performance in aerospace, electronic industry and other fields. However, there are still many challenges to develop superhydrophobic surface, which...

Cited by 17 publications

References 26 publications

Highly Stretchable, Fast Self-Healing, Self-Adhesive, and Strain-Sensitive Wearable Sensor Based on Ionic Conductive Hydrogels

Highly Stretchable, Fast Self-Healing, Self-Adhesive, and Strain-Sensitive Wearable Sensor Based on Ionic Conductive Hydrogels

Penetrant shape effects on activated dynamics and selectivity in polymer melts and networks based on self-consistent cooperative hopping theory

Preparation of superhydrophobic asymmetric vitrimer coating with high porosity and the key role of hierarchical pocket structure on long freeze delay time and high durability

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