Robust polyurea icephobic coatings with static large-scale de-icing and dynamic anti-icing performance

Li, Jun; Jiao, Weicheng; Jin, Haozheng; Lu, Qiao; Sun, Haomiao; Yin, Yuxin; He, Xiaodong

doi:10.1016/j.cej.2023.147339

Cited by 10 publications

(9 citation statements)

References 42 publications

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“…Thus, ice formation or adhesion severely affects the reliability of aircrafts. 1,2 Flight accidents caused by icing are a common occurrence. Demand for the development of anti-deicing technology is becoming more and more urgent.…”

Section: Introductionmentioning

confidence: 99%

“…When aircrafts fly under freezing weather conditions, ice will form on the surface of aerofoil, empennage, and engine inlet port, modifying the effective shape of aircrafts, which in turn modifies the aerodynamic properties of air flow. Thus, ice formation or adhesion severely affects the reliability of aircrafts. , Flight accidents caused by icing are a common occurrence. Demand for the development of anti-deicing technology is becoming more and more urgent.…”

Section: Introductionmentioning

confidence: 99%

“…Demand for the development of anti-deicing technology is becoming more and more urgent. Anti/deicing not only is essential for aircraft applications but can also be extended to other applications, such as high-speed railway, ships, power lines, wind turbines, etc. − Traditional strategies include mechanical deicing via mechanical removal and electrothermal deicing via Joule heating. The former is inefficient, while the latter consumes a lot of electrical energy.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Hydrophobicity of PVDF-Based Films Prepared by Electrospinning Technique

Qin,

Ma,

et al. 2024

J. Phys. Chem. C

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Nowadays, demand for the development of anti-deicing technology is becoming more and more urgent. Multifunctional is the inevitable choice of application of superhydrophobic materials in the area of anti-icing. In this work, polyvinylidene fluoride (PVDF)-based superhydrophobic films were successfully prepared by an electrospinning technique. Effects of electrospinning parameters and material compositions on the films' hydrophobic property and morphology were studied. When the drum collector rotation speed was 300 rpm, pure PVDF samples showed the best hydrophobic property, and the maximum WCA value was 145.8°. Compared with pure PVDF films and SiO 2 /PVDF films, PZT/SiO 2 /PVDF films (PZT = lead zirconate titanate) showed better hydrophobic property, whose WCA values were greater than 152°(the maximum WCA value was 158.5°), and the roll-off angle (RA) values were less than 9.5°. The microstructure of all samples was mainly composed of blocks with irregular shapes, with some microspheres, nanofibers, and holes. Nanoscale papillae and nanoparticles formed on the surface of each block and microsphere. The comprehensive effect of these factors contributed to the enhancement of hydrophobicity. At last, PZT/SiO 2 / PVDF films exhibited longer delay freezing time and curing time. When the added F−SiO 2 (SiO 2 modified by perfluorodecyl triethoxysilane) content was 25%, PZT-5# exhibited a delay freezing time of 50 s and a curing time of 204 s.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructure and Hydrophobicity of PVDF-Based Films Prepared by Electrospinning Technique

Qin,

Ma,

et al. 2024

J. Phys. Chem. C

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“…In recent years, there has been a growing interest in intrinsic ice-resistant surfaces that demonstrate promising characteristics such as low ice adhesion strength and the ability to effectively remove ice on a large scale. − These intrinsic surfaces are usually rough on different length scales, leading to the formation of voids at the ice–surface interface. These voids serve as crack initiators, induce stress concentration, and facilitate ice removal from the surface. − The critical strength required to separate two solid surfaces can be described by the equation τ = E G / ( π α Λ ) where E , G , α, and Λ represent the elastic modulus, surface energy, crack length and a nondimensional constant related to geometric configuration, respectively .…”

Section: Introductionmentioning

confidence: 99%

Well-Tailored Norbornene-Based Fluorinated Copolymers toward Modulating Icephobicity and Mechanical Robustness

Luo,

Gao,

Zhou

et al. 2024

Langmuir

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Well-tailored construction of icephobic surfaces with mechanical robustness and investigation of the structure–property relationships at the molecular level are highly desirable. Herein, a series of norbornene-based fluorinated polyolefin copolymers (FPOR-x) with varying norbornenyl dodecafluoroheptyl ester (NDFHE) molar fractions (0–100 mol %) were well-designed and fabricated via living ring-opening metathesis polymerization (ROMP) employing NDFHE and norbornenyl pentafluorophenyl ester (NPFPE) as the soft and hard segments, respectively. The mechanical and icephobic properties of the fluorinated copolymers can be regulated by adjusting the soft NDFHE contents. As a result, the well-designed norbornene-based copolymers exhibited a wide range of tunable mechanical properties, including tensile strength ranging from 0.2 to 26.4 MPa, elastic modulus ranging from 0.6 to 593.7 MPa, and breaking elongations ranging from 5718.7% to 3.7%, correlating with the proportion of soft NDFHE content. Furthermore, the synergistic interplay between soft and hard segments, particularly the hardness in the majority and softness in the minority or vice versa, could achieve a significant difference in the local modulus and enhance the propagations of cracks within the three-phase regions (soft regions/hard regions/ice), ultimately leading to a significant reduction in ice shear strength. Notably, FPOR-25% with a tensile strength of 12.0 MPa and an elastic modulus of 227.5 MPa exhibited a remarkably low ice shear strength of 57.7 kPa. This study not only highlights the relationship between the polymer molecular structure and surface icephobic properties but also breaks the limitations of icephobic surfaces with a low modulus.

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“…According to the analyses above, although PDMS-based organogels showed low/ultralow ice adhesion strength, their softness nature limited the mechanical robustness (significantly lower than 1 MPa), leading to poor mechanical durability and undesirable large deformation in specific applications, such as wind turbine blades and aircraft leading edges. − Therefore, the fabrication of stimuli-responsive organogels with simultaneous mechanical enhancement, durability, and low ice adhesion to meet the requirement for practical applications remains a big challenge.…”

Section: Introductionmentioning

confidence: 99%

Pressure-Responsive Self-Lubricating Ice-Phobic Organogel with High Mechanical Strength from Fluorinated Polynorbornene Networks

Luo,

Xu,

Gong

et al. 2024

ACS Appl. Polym. Mater.

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Developing smart organogels with simultaneous low ice adhesion, high mechanical strength, and durability through a simple method has proven to be challenging yet valuable. In this work, organogels (NF-x) possessing variable liquid paraffin contents (0−50 wt %) with fluorinated polynorbornene networks were produced by ring-opening metathesis polymerization (ROMP) using norbornene-trifluoroethyl ester (NF) and dinorbornyl glycol ester (NEG) as monomer and cross-linking agent, respectively. The stability, mechanical behavior, anti-icing, and antifrosting properties were comprehensively investigated. Owing to the well-designed networks, the organogels exhibited excellent stability even under harsh conditions for long-term use. Unprecedentedly, they showed a reversible pressure-responsive effect, wherein the paraffin could migrate from the inside of the gels to form a self-lubricating layer covering the surface under external force and subsequently reabsorbed and recovered to the original state upon force removal, enhancing the on-demand secretion of lubricants to the surface. The sensitivity to the applied force (merely 4 kPa of NF-5) was positively correlated with the paraffin content in the organogels. Benefiting from the fluorinated polynorbornene networks and switchable self-lubricating property, the organogels showed excellent durability in mechanical, antiicing, and antifrosting properties. Additionally, the mechanical, anti-icing, and antifrosting properties could be adjusted by varying the paraffin content. Notably, the NF-5 ice-phobic coating with 50 wt % paraffin exhibited high mechanical strength (1.69 MPa) and low ice shear strength (17.65 kPa), even after 15 icing−deicing cycles, remaining below 28 kPa. This study offers an approach to conveniently develop smart anti-icing materials with high mechanical durability.

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Robust polyurea icephobic coatings with static large-scale de-icing and dynamic anti-icing performance

Cited by 10 publications

References 42 publications

Microstructure and Hydrophobicity of PVDF-Based Films Prepared by Electrospinning Technique

Microstructure and Hydrophobicity of PVDF-Based Films Prepared by Electrospinning Technique

Well-Tailored Norbornene-Based Fluorinated Copolymers toward Modulating Icephobicity and Mechanical Robustness

Pressure-Responsive Self-Lubricating Ice-Phobic Organogel with High Mechanical Strength from Fluorinated Polynorbornene Networks

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