Superhydrophobic Foams with Chemical- and Mechanical-Damage-Healing Abilities Enabled by Self-Healing Polymers

Fu, Yonghao; Xu, Fan; Weng, Dehui; Li, Xiang; Yang, Li; Sun, Junqi

doi:10.1021/acsami.9b11858

Cited by 80 publications

(30 citation statements)

References 62 publications

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“…This was the first reported self-repairing superhydrophobic report that simultaneously repaired severe physical and chemical damage, but selfrepair relied on heating. A later study by Sun et al [81] prepared a self-repairing superhydrophobic foam capable of repairing large-scale physical and chemical damage at room temperature. A self-repairing polymer was synthesized via polymerization of bis(3-aminopropyl)-terminated poly(dimethylsiloxane) (NH 2 -PDMS-NH 2 ) and isophorone diisocyanate, referred to as PDMS-PUa (Figure 25a).…”

Section: Simultaneous Repair Of Chemical and Physical Damagementioning

confidence: 99%

“…[39] The high WCA and low SA of superhydrophobic surfaces facilitates easy dust removal from superhydrophobic surfaces with rolling water droplets. The EP+PDMS@SiO 2 superhydrophobic coating with excellent self-cleaning properties in air or oil [81] Copyright 2019, American Chemical Society. www.advmatinterfaces.de developed by Liu et al [50] is a good example of such a coating (Figure 27a,b).…”

Section: Self-cleaning Applicationsmentioning

confidence: 99%

mentioning

confidence: 99%

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Recent Progress in the Fabrication and Characteristics of Self‐Repairing Superhydrophobic Surfaces

Liu

Han

et al. 2021

Adv Materials Inter

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the liquid and the internal force of the system reaches equilibrium, the liquid cannot continue to wet the solid surface to minimize the energy of the system. Thus, wetting occurs more easily when the low surface free energy components are lost from the surface. The micro-nanostructure on the surface affects the hydrophobicity of a surface because, according to the Wenzel and Cassie-Baxter theory, a rough surface has higher wettability. [34,35] However, the chemical components and hierarchical structures on the surface are easily damaged in many environments and improved the durability relies on enhancing the stability of both.Damage to superhydrophobic surfaces is broadly categorized as either chemical, micro-nanostructural, or a combination thereof (Figure 1). Damage to chemical components can occur via exposure to ultraviolet (UV) light, strong acid or alkali, or O 2 plasma. This damage can lead to a loss of a surface's original superhydrophobicity. However, this damage may be repaired in various ways, thereby regaining the chemical components and, in turn, superhydrophobicity. Physical abrasion can also damage chemical components on the surface and lead to the loss of superhydrophobicity. In this case, superhydrophobicity can be regained by stimulating the migration of chemical components toward the surface. Damage to the micro-nanostructure can occur when a superhydrophobic surface is scratched or cut. This damage can be repaired via swelling of the polymer, flow of the melt polymer, or reversible chemical bonding to restore the surface structure. Due to the diversity of environmental damages, a combination of chemical and micro-nanostructural damage is most likely to occur. This complex damage can only be repaired by combining strategies to address both types.The self-repairing functions of various living organisms have inspired research into surfaces with self-repairing properties for enhanced durability. [36][37][38] Although many papers have reported self-repairing superhydrophobic coatings, [36][37][38][39] few have reported the integration of fabrication methods, damage categories, repair methods, and the respective advantages and disadvantages. This review provides an overview of the recent progress in the fabrication and characteristics of self-repairing superhydrophobic surfaces, including chemical component, physical structure, and combined repair. The application of superhydrophobic coatings is briefly described, and the critical limitations regarding self-repairing superhydrophobic coatings are highlighted. Further, perspectives on future research and development are provided.Superhydrophobic surfaces show promise in a wide variety of potential applications that require self-cleaning, antifogging, anti-icing, anticorrosion, and antifouling properties. However, these surfaces often exhibit poor durability against physical or chemical damage, such as deep cut, ultraviolet irradiation, and oxygen plasma treatment. Superhydrophobic surfaces with self-repairing properties have been recently developed ...

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Section: Simultaneous Repair Of Chemical and Physical Damagementioning

confidence: 99%

Section: Self-cleaning Applicationsmentioning

confidence: 99%

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Recent Progress in the Fabrication and Characteristics of Self‐Repairing Superhydrophobic Surfaces

Liu

Han

et al. 2021

Adv Materials Inter

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“…Previously, our group has reported that self-healing superhydrophobic porous materials with a photothermal conversion ability capable of healing physical damage can be obtained by using a self-healing hydrophobic polymer and carbon nanotubes as the main materials and by using NaCl as the template. 53 By the combination of the experience in fabricating self-healing porous materials and the widely available knowledge for the synthesis of a hydrophilic self-healing polymer, a rational selection of the material composition is thought to lead to self-healing hydrophilic photothermal membranes with advantages of a long-term, highefficiency evaporation capability for solar-driven interfacial evaporators.…”

Section: Introductionmentioning

confidence: 99%

Self-Healing Hydrophilic Porous Photothermal Membranes for Durable and Highly Efficient Solar-Driven Interfacial Water Evaporation

Weng

et al. 2022

CCS Chem

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It is highly desirable to develop a solar-driven interfacial water evaporator with a self-healing ability and highefficiency water evaporation performance for water distillation and desalination, but it is still considerably challenging. Herein, by exploiting the advantages of the self-healing hydrophilic polymer, a self-healing hydrophilic porous photothermal (SHPP) membrane is fabricated by the curing of a mixture of a self-healing hydrophilic polymer, carbon black, and NaCl, followed by the removal of NaCl in water. As the SHPP membrane can simultaneously serve as a photothermal layer and water transportation channel, a solar-driven interfacial evaporator can be readily fabricated by the assembly of the SHPP membrane with a polyethylene foam. The SHPP membrane-based evaporator exhibits a water evaporation rate of 1.68 kg m -2 h -1 and an energy efficiency of 97.3%. These values are superior to those obtained using solar-driven interfacial evaporators with a selfhealing capability. Notably, by reforming hydrogen bonds between fracture surfaces, the SHPP membrane can regain its structural integrity after breaking, making the SHPP membrane-based evaporator the first evaporator that can completely and repeatedly heal water evaporation capacity after physical damage. Herein, the potential of SHPP membranes for developing stable, long-lasting, and high-efficiency solar-driven interfacial water evaporators is highlighted.

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“…In this melting polymerization, monomers are melted and subjected to a polycondensation reaction to yield a highly viscous resin, which can be directly processed into the desired materials. In 1946, Whinfield first developed a melting polymerization path for polyester production by the transesterification polycondensation of diols with diester monomers [35]. This method is still used for the production of millions of tons of polyester each year.…”

Section: Introductionmentioning

confidence: 99%

Highly Stretchable Fully Biomass Autonomic Self-Healing Polyamide Elastomers and Their Foam for Selective Oil Absorption

2021

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Renewable polymers with self-healing ability, excellent elongation, hydrophobicity, and selective oil absorption attributes are of interest for an extensive range of applications, such as e-skin, soft robots, wearable devices, and cleaning up oil spills. Herein, two fully renewable eco-friendly polyamide (PA)-based self-healing elastomers (namely, PA36,IA, and PA36,36) were prepared by a facile and green one-pot melt polycondensation of itaconic acid (IA), PripolTM 1009, and PriamineTM 1075 monomers. The molecular structures of these PAs were analyzed by FITR, 1H NMR, and 13C NMR. The distinct structure of these PAs shows superior strain values (above 2300%) and high ambient temperature autonomous self-healing ability. Interestingly, the synthesized renewable PA36,36 showed zero water absorption values and hydrophobic properties with a contact angle of θ = 91o compared to the synthesized PA36,IA and other previously reported PAs. These excellent attributes are due to the low concentration of amide groups, the highly entangled main chains, the intermolecular diffusion, the manifold dangling chains, and the numerous reversible physical bonds within the renewable PAs. Furthermore, the hydrophobic properties may aid in the selective oil absorption of the PA36,36-based foam, for which PA36,36 foam is produced by the green supercritical carbon dioxide (scCO2) batch foaming process. The PA36,36 foam with a microporous cellular structure showed better absorption capacity and high stability in repeated use. Due to these advantages, these bio-based PAs have potential for the production of eco-friendly self-healing materials, superabsorbent foams, and other polymeric materials.

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Superhydrophobic Foams with Chemical- and Mechanical-Damage-Healing Abilities Enabled by Self-Healing Polymers

Cited by 80 publications

References 62 publications

Recent Progress in the Fabrication and Characteristics of Self‐Repairing Superhydrophobic Surfaces

Recent Progress in the Fabrication and Characteristics of Self‐Repairing Superhydrophobic Surfaces

Self-Healing Hydrophilic Porous Photothermal Membranes for Durable and Highly Efficient Solar-Driven Interfacial Water Evaporation

Highly Stretchable Fully Biomass Autonomic Self-Healing Polyamide Elastomers and Their Foam for Selective Oil Absorption

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