Near infrared light responsive surface with self-healing superhydrophobicity in surface chemistry and microstructure

Hou, Yacong; Ding, Wei; Yu, Yadong; Wang, Jiadao; Chen, Lei

doi:10.1016/j.apsusc.2022.153772

Cited by 18 publications

(8 citation statements)

References 23 publications

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“…The dynamic controllability of the surface pillar process is shown in Figure a–f and described in Wettability Control of the FAS@MS@CS@SMPU Surface. This was realized with cooperation between the PE of the CS and the SME of the SMPU. , The pillars on the surface collapsed and recovered several times with pressing and irradiation treatments. At first, the pillars exhibited the original average height of 30 μm (Figure a,b).…”

Section: Resultsmentioning

confidence: 99%

“…This was realized with cooperation between the PE of the CS and the SME of the SMPU. 38,39 The After sequentially irradiating, pressing, and cooling them (the cooling process kept the surface in the collapsed structure), all pillars collapsed to give an average pillar height of approximately 0.5 μm (Figure 4e,f). After NIR irradiation for approximately 20 s and then cooling, the pillars recovered partially to an average height of 12 μm (Figure 4c,d).…”

Section: ■ Introductionmentioning

confidence: 99%

“…This was realized with cooperation between the PE of the CS and the SME of the SMPU. 38,39 The pillars on the surface collapsed and recovered several times with pressing and irradiation treatments. At first, the pillars exhibited the original average height of 30 μm (Figure 4a,b).…”

Section: ■ Introductionmentioning

confidence: 99%

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Near-Infrared Light Responsive Surface with Switchable Wettability in Microstructure and Surface Chemistry

et al. 2023

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Intelligent surfaces with reversibly switchable wettability have recently drawn considerable attention. One typical strategy to obtain such a surface is to change the surface chemistry or the microstructure. Herein, we report a new smart surface for which the wettability was controlled by both the surface chemistry and microstructure. Various wetting states were reversibly and precisely controlled through heating, pressing, NIR irradiation, and oxygen plasma treatment. The excellent shape memory characteristics of shape memory polyurethane (SMPU) and the controlled release of hydrophobic/hydrophilic oxygen-containing functional groups contributed to this ability. Microcapsules were used to design these smart surfaces. They controlled the release of a fluorinated alkyl silane (FAS) through shell melting, changed the surface composition, and played a decisive role in protecting the FAS against hydrolysis and evaporation to ensure that the surface’s wettability is recyclable. Controlling of the surface chemistry or microstructure was repeated for at least 19 or 16 cycles, respectively, which indicated excellent repeatability compared to other smart surfaces. Based on the excellent controllability, the surface exhibited multiple functions, such as liquid directional transport and coefficient of friction control. In addition, it maintained this extraordinary ability under harsh environments owing to the great stability of the SMPU and adequate protection of the FAS by the microcapsules. With switchable wettability based on the surface chemistry and microstructure, this work provides a new principle for designing smart surfaces with wettability controlled in two ways.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Near-Infrared Light Responsive Surface with Switchable Wettability in Microstructure and Surface Chemistry

et al. 2023

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“…As the PHHD at the friction interface precipitated at the bottom, the lubricity on the other side decreased and even disappeared. On the other hand, as the shells of the microcapsules did not melt at 80 • C [17,25], PHHD@MS was still evenly dispersed in the EP resin. Therefore, phase separation was avoided through the introduction of microcapsules.…”

Section: Friction and Wear Tests Of Ep Compositesmentioning

confidence: 99%

“…Microcapsules with core-shell structures have attracted much attention as encapsulation materials for friction due to their high surface area, large inner volume, and tunability [19][20][21][22][23][24][25][26]. Xiong et al [27] used mesoporous carbon nanospheres as nanoscale containers and prepared an oil-containing composite with excellent tribological performance and self-lubricating properties.…”

Section: Introductionmentioning

confidence: 99%

Controllable Friction of an Epoxy Composite via Thermal Treatment

Hou,

Liu,

Chen

et al. 2023

Applied Sciences

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Smart surfaces with controllable friction have generated considerable attention lately. However, most composites prepared with traditional fillers cannot achieve “real-time” friction conversion. Herein, a new smart surface was designed to achieve different friction coefficients (0.65 and 0.12). Different coefficients of friction were reversibly and precisely controlled via heating. Via friction and heating, 1H,1H,2H,2H-perfluorohexyl hexadecane (PHHD), a kind of phase-change material—paraffin wax—was released from the microcapsules, and a stable and complete film was formed. It changed the interface from “solid-solid” to “solid-liquid” in a dry friction state. The composite contains microcapsules that prevent phase separation between PHHD and matrix, which enables the composite to have a long service time and switchable friction performance. In addition, this composite can maintain its extraordinary ability even in harsh environments like UV irradiation. By demonstrating switchable friction based on changes in the interactions between contact interfaces, this work provides a new principle for designing smart tribological composites.

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Long‐Term Immersion Study for Durability of Interconnected Micropatterned Surfaces with Sustained Water Repellency

Park,

Oh,

Kim

et al. 2024

Adv Materials Inter

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The sustained water repellency of interconnected micropatterned surfaces is explored over an extended duration, with a focus on their resilience during a 90‐day water‐immersion test. Initially, the microstructure surfaces exhibit high water repellency, a characteristic of the Cassie–Baxter state. However, subsequent detailed temporal analyses reveal varying responses depending on the structural topology. The interconnected micropatterned surfaces exhibit remarkable long‐term resistance to water; this is attributed to the formation of large and stable air pockets enabled by their unique microcavity structures. In comparison, hierarchical microcavity surfaces with micropillars exhibit a notable decrease in water repellency, as evidenced by reduced contact angles, suggesting a transition to a wetting state owing to the emergence of surface hydrophilicity during long‐term water exposure. This study demonstrates the importance of stable air‐pocket effects, particularly in applications where the long‐term stability of liquid repellency is critical, and suggests the role of interconnected structures in maintaining water repellency over time.

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Near infrared light responsive surface with self-healing superhydrophobicity in surface chemistry and microstructure

Cited by 18 publications

References 23 publications

Near-Infrared Light Responsive Surface with Switchable Wettability in Microstructure and Surface Chemistry

Near-Infrared Light Responsive Surface with Switchable Wettability in Microstructure and Surface Chemistry

Controllable Friction of an Epoxy Composite via Thermal Treatment

Long‐Term Immersion Study for Durability of Interconnected Micropatterned Surfaces with Sustained Water Repellency

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