Synthesis and surface properties of novel fluorinated polyurethane base on F‐containing chain extender

Zhang, Long; Kong, Qinggang; Kong, Fanxin; Liu, Taolin; Qian, Haiyan

doi:10.1002/pat.4802

Cited by 10 publications

(7 citation statements)

References 35 publications

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“…However, incorporation of higher amounts of fluorinated polyol leads to a decrease in glass temperature suggesting that fluorinated chain extender act as a plasticizer for PU soft segments. A similar effect was observed by Zhang et al [24] who investigated properties of fluorinated PUs based on F-containing chain extender. The authors postulated that relatively small changes in glass transition temperature suggest no serious changes in phase separation in the obtained polymers.…”

Section: Chemical Structures and Molecular Mass Distributionsupporting

confidence: 80%

Polyurethane cationomers containing fluorinated soft segments with hydrophobic properties

et al. 2021

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The synthesis of ecological waterborne polyurethane cationomers containing fluorinated polyol (0–20 wt.%) was successfully performed. FTIR and NMR analysis results confirmed the structure of the obtained polyurethane cationomers and incorporation of fluorinated component into the polyurethane chains. Average molar mass and phase structure of the obtained PU thin films were determined based on GPC, FTIR, WAXD and SEM-EDX results. The obtained cationomers have linear structures with clearly visible microphase separation of soft and hard segment domains; the presence of fluorinated polyol changes the strength of hydrogen bonds and in consequence degree of phase separation. The activation energy of glass transition was calculated based on multi-frequency DSC data. It has been shown that the presence of soft fluorinated segments in the cationomer structure strongly influences the hydrophobic, thermal and mechanical properties of the obtained films.

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Section: Chemical Structures and Molecular Mass Distributionsupporting

confidence: 80%

Polyurethane cationomers containing fluorinated soft segments with hydrophobic properties

et al. 2021

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“…The most significant thermal degradation is shown from 320°C (lost weight 7.1%) to 450°C (lost weight 27.2%). It is mainly due to the removal of chemisorbed water in the coating and the condensation–dehydration between residual Si‐OH and the decomposition of organic materials 28,34–36 . Meanwhile, the organic fluorocarbon segments may be transformed into inorganic fluorinated compounds.…”

Section: Resultsmentioning

confidence: 99%

“…Si-OH and the decomposition of organic materials. 28,[34][35][36] Meanwhile, the organic fluorocarbon segments may be transformed into inorganic fluorinated compounds. In the study, roughness decrease of the outermost layer cannot sustain the super-repellent performance to organic liquids whose surface tensions are lower than 30 mN/m, although dual-nanometer porous silicas were applied to construct the nanostructures.…”

Section: Resistance To Chemical Solventsmentioning

confidence: 99%

Heat‐resistant superamphiphobic robust surface by self‐assembled monolayer surface reaction

Liu

Kong

Mao

et al. 2021

Surface & Interface Analysis

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Superamphiphobic surfaces have been arousing great attention in recent years for improved durability in practical applications. In this study, composites of dual‐sized porous silicas of micro‐/nanoparticles and silicic acid binder were coated on the glassy substrate as the micro‐/nano‐structure, then 60 nm porous silica particles modified by 3‐aminopropyltriethoxysilane (APTS) were coated. With the aid of the efficient, rapid, and stoichiometric reaction of amino group and epoxy group, the monolayer low‐surface‐energy long perfluorinated chains self‐assembled in the surface. Field emission scanning electron microscope (FESEM) and atomic force microscopy (AFM) verified the concave–convex surface topological features. This surface realized super‐repellency to liquids (surface tension ranging from 72.0 to 27.2 mN/m). This surface sustains superamphiphobicity after 15 times of the tape tearing test. After soaking in base (pH = 14), acid (pH = 1), and n‐heptane for 20 days, this surface still holds superamphiphobicity. Its heat‐resistant ability is so outstanding that it keeps superamphiphobicity after drying for 3 h at 250°C.

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“…Summary of the deeper comparison by other investigators and relevant studies of poly-urethane coatings. References [12,[52][53][54][55][56][57][58][59] are cited in the Supplementary Materials.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Synthesis and Characterization of Crosslinked Castor Oil-Based Polyurethane Nanocomposites Based on Novel Silane-Modified Isocyanate and Their Potential Application in Heat Insulating Coating

et al. 2022

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An isocyanate with trimethoxysilane groups at the side chains (IPDI-M) was synthesized via an addition between the mercaptopropyl trimethoxysilane groups (MPTMS) and IPDI tripolymer (IPDI-T). Then, silane grafted isocyanate as the functional hard segment, castor oil as the soft segment, poly (ethylene adipate) diol (PEA) as the chain extender, and MPTMS as an end-capping reagent were applied to form a series of organosilicon hybrid bio-based polyurethane (CPUSi). The effect of the IPDI-M contents on the thermal stability, mechanical properties, and surface properties of the resulting product was systematically investigated. Profit from the Si–O–Si crosslinked structures formed from MPTMS curing, the tensile strength, and Young’s modulus of the resulting products increased from 9.5 MPa to 22.3 Mpa and 4.05 Mpa to 81.59 Mpa, respectively, whereas the elongation at break decreased from 342% to 101%. The glass transition temperature, thermal stability, transparency, hydrophobicity, and chemical resistance were remarkably strengthened for the obtained organosilicon-modified polyurethane with the increasing MPTMS content. At the end of the work, the thermal insulation coating that was based on CPUSi and ATO can effectively block near-infrared rays, and the temperature difference between the inside and outside of the film reached 15.1 °C.

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Synthesis and surface properties of novel fluorinated polyurethane base on F‐containing chain extender

Cited by 10 publications

References 35 publications

Polyurethane cationomers containing fluorinated soft segments with hydrophobic properties

Polyurethane cationomers containing fluorinated soft segments with hydrophobic properties

Heat‐resistant superamphiphobic robust surface by self‐assembled monolayer surface reaction

Synthesis and Characterization of Crosslinked Castor Oil-Based Polyurethane Nanocomposites Based on Novel Silane-Modified Isocyanate and Their Potential Application in Heat Insulating Coating

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