Enhanced hydrophobicity of polyurethane with the self-assembly of perfluoropolyether-based triblock copolymers

Gu, Xixi; Gao, Tiantian; Meng, Xiangping; Zhu, Yun; Wang, Guiyou

doi:10.1016/j.porgcoat.2021.106561

Cited by 6 publications

(10 citation statements)

References 47 publications

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“…Introducing hydrophobicity into PU with plenty of oxygen-containing groups is a challenge, and most studies resort to fluorinated PU, which is harmful to the environment and toxic. , To fabricate a fluorine-free SHS, alkyl-functionalized MOF nanoparticles with a nanohierarchical morphology were employed. Spray-coated films of MOF nanoparticles and DA–PU mixture were treated by OTS to achieve superhydrophobicity (see Figure a).…”

Section: Resultsmentioning

confidence: 99%

Self-Healing, Robust, Liquid-Repellent Coatings Exploiting the Donor–Acceptor Self-Assembly

Zhang

Singh

Huang

et al. 2023

ACS Appl. Mater. Interfaces

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Liquid-repellent coatings with rapid self-healing and strong substrate adhesion have tremendous potential for industrial applications, but their formulation is challenging. We exploit synergistic chemistry between donor−acceptor self-assembly units of polyurethane and hydrophobic metal−organic framework (MOF) nanoparticles to overcome this challenge. The nanocomposite features a nanohierarchical morphology with excellent liquid repellence. Using polyurethane as a base polymer, the incorporated donor−acceptor self-assembly enables high strength, excellent self-healing property, and strong adhesion strength on multiple substrates. The interaction mechanism of donor−acceptor self-assembly was revealed via density functional theory and infrared spectroscopy. The superhydrophobicity of polyurethane was achieved by introducing alkyl-functionalized MOF nanoparticles and post-application silanization. The combination of the selfhealing polymer and nanohierarchical MOF nanoparticles results in self-cleaning capability, resistance to tape peel and high-speed liquid jet impacts, recoverable liquid repellence over a self-healed notch, and low ice adhesion up to 50 icing/deicing cycles. By exploiting the porosity of MOF nanoparticles in our nanocomposites, fluorine-free, slippery liquid-infused porous surfaces with stable, low ice adhesion strengths were also achieved by infusing silicone oil into the coatings.

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Section: Resultsmentioning

confidence: 99%

Self-Healing, Robust, Liquid-Repellent Coatings Exploiting the Donor–Acceptor Self-Assembly

Zhang

Singh

Huang

et al. 2023

ACS Appl. Mater. Interfaces

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“…[ 29 ]. Modified and hybrid PUR foams based on various proportions of these non-PUR units for mild or advanced modifications, respectively, can be found in the literature [ 33 , 34 , 35 ].…”

Section: Rigid Cellular Materialsmentioning

confidence: 99%

A Review of Rigid Polymeric Cellular Foams and Their Greener Tannin-Based Alternatives

et al. 2022

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This review focuses on the description of the main processes and materials used for the formulation of rigid polymer foams. Polyurethanes and their derivatives, as well as phenolic systems, are described, and their main components, foaming routes, end of life, and recycling are considered. Due to environmental concerns and the need to find bio-based alternatives for these products, special attention is given to a recent class of polymeric foams: tannin-based foams. In addition to their formulation and foaming procedures, their main structural, thermal, mechanical, and fire resistance properties are described in detail, with emphasis on their advanced applications and recycling routes. These systems have been shown to possess very interesting properties that allow them to be considered as potential substitutes for non-renewable rigid polymeric cellular foams.

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“…Over the past decades, perfluoropolyether materials have been successfully used in anti-smudge, self-cleaning, superhydrophobic, and hydrophobic coatings, and so forth. 13,[32][33][34][35] In this work, our group tried to prepare polymethylhydrosiloxane with different hydrogen contents by anionic ring-opening reactions. Then, four different equivalent PPM were introduced into polymethylhydrosiloxane to prepare four kinds of PEPS with different grafting ratios.…”

Section: Introductionmentioning

confidence: 99%

Perfluoropolyether methyl propionate polysiloxane coating with high hydrophobicity and low dielectric property

et al. 2023

J of Applied Polymer Sci

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Developing materials with a combination of superior properties such as hydrophobicity and low dielectric is very challenging. This work proposes a design strategy based on the synergistic effect of silicon fluorine to fabricate fluorous silicon materials with excellent hydrophobicity and dielectric properties. Perfluoropolyethyl propionate polysiloxane (PEPS) with different grafting ratios was synthesized by the reaction of polymethylhydrosiloxane (PMHS) and perfluoropolyethyl methacrylate (PPM) hydrosilane. The self-crosslinking perfluoropolyether methyl propionate polysiloxane (PFSP) coating with good hydrophobicity and low dielectric was prepared by further introducing triethoxyvinylsilane (TOVS) into the PEPS and condensing. The fluorine content of two interfaces (film PET and film air) of PFSP-4 film was analyzed by XPS, and it was found that the fluorine content of the film air interface was 46.19% and that of the film PET interface was 17.3%. With the increase of perfluoropolyether content in PFSP, fluorine-containing groups migrate to the coating surface, which is more conducive to enhancing the hydrophobicity of the coating. The results indicate that the film has excellent hydrophobicity with a high water contact angle of up to 117 due to the introduction of PPM. In addition, the dipole moment of perfluoropolyether methyl methacrylate is 2.27, which is lower than that of methyl. Therefore, the introduction of a large number of perfluoropolyether bonds effectively reduces the polarity of the material, which is beneficial to its low dielectric properties. The dielectric constant of PFSP-4 is 2.4, which is 33% lower than that of a fluorine-free silicone coating. The results show that the self-crosslinking perfluoropolyether methacrylate polysiloxane coating has excellent hydrophobicity and low dielectric properties, so it has a feasible application prospect in the electronic industry.

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Enhanced hydrophobicity of polyurethane with the self-assembly of perfluoropolyether-based triblock copolymers

Cited by 6 publications

References 47 publications

Self-Healing, Robust, Liquid-Repellent Coatings Exploiting the Donor–Acceptor Self-Assembly

Self-Healing, Robust, Liquid-Repellent Coatings Exploiting the Donor–Acceptor Self-Assembly

A Review of Rigid Polymeric Cellular Foams and Their Greener Tannin-Based Alternatives

Perfluoropolyether methyl propionate polysiloxane coating with high hydrophobicity and low dielectric property

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