Coating properties of UV-curable polyurethane acrylate composites with lotus leaf powder

Chun, Junchul; YongKwang, Cho; Jin, Yoonhee; Park, Chan Young; Park, Seong Soo; Lee, Won‐Ki

doi:10.1080/15421406.2018.1456093

Cited by 5 publications

(6 citation statements)

References 10 publications

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“…Studies have shown that the fluorine-containing carbon chain in organic fluorine compounds has a strong shielding effect and stability, and can reduce the surface energy of the material [12][13][14][15]. Therefore, organic fluorine compounds are frequently an ideal candidate to improve the hydrophobic properties of WPU films in many research works [16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Until now, methods concerning fluorinated polyurethane have been mainly included as the imbedding of fluoroalkyl groups into the PU backbone as fluorine-containing small molecule diols [16,17], polyether diols [18] or macromolecular polyether diols [19,20], the immobilizing of fluorinated segments into the PU side chain as fluorine-containing pendant groups diols [21][22][23][24], the blocking of those groups at the two PU tails [25], the distributing of fluorocarbon segments in the hyperbranched PU terminals [26][27][28][29][30], etc. However, the effectiveness of hydrophobic modification was unsatisfactory when using the fluorine-containing small diols, for example, octafluorohexyl diol, where the static water contact angle on its latex films could only attain 97.2 • [16].…”

Section: Introductionmentioning

confidence: 99%

“…However, the effectiveness of hydrophobic modification was unsatisfactory when using the fluorine-containing small diols, for example, octafluorohexyl diol, where the static water contact angle on its latex films could only attain 97.2 • [16]. Although the contact angle of the UV-cured polyurethane acrylates with fluorine-containing macromolecular polyether (PFPE) diol could increase to 107.1 • [20], the cost was not cost-effective due to numerous introductions of fluorine-containing segments. Thus, it is of great importance to more effectively improve the water resistance of waterborne polyurethane.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Synergistic Effect of Terminal and Pendant Fluoroalkyl Segments on Properties of Polyurethane Latex and Its Film

et al. 2022

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The hydrophobic modification effect and an appropriate cost of waterborne polyurethane are regularly pursued targets of researchers. To further enhance the hydrophobic modification effect of the terminal fluoroalkyl group and control the cost, a fluorine-containing pendant group diol (DEFA) was first synthesized by the Michael addition reaction of diethanolamine (DEOA) and dodecafluoroheptyl methacrylate (G04). Next, a series of modified polyurethane latexes (TPFPU) by the terminal fluoroalkyl segments (perfluorohexyl ethanol, S104) and the pendant fluoroalkyl segments (DEFA) were synthesized by varying the DEFA dosage. Structure and performance properties of the resultants were characterized by IR, 1H NMR, TEM, TGA, DSC, XRD, XPS, SEM, AFM and contact angle measurements. Results confirmed that the product could be successfully prepared using the present method. With the increase in DEFA dosage, the average particle size increased gradually. Thermal stability was enhanced and small regional crystals were probably produced. XPS and AFM results demonstrated that the degree of microphase separation and film roughness were increased with the increase in DEFA amount. Hydrophobicity of the TPFPU’s film was also increased with the increase in DEFA dosage, and it could be guaranteed when the mass content of S104 and DEFA was larger than 17.0 wt% in total mass of raw materials, which demonstrates that the terminal and pendant fluoroalkyl groups have the favorable synergistic effect on the properties of polyurethane.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Synergistic Effect of Terminal and Pendant Fluoroalkyl Segments on Properties of Polyurethane Latex and Its Film

et al. 2022

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“…On the one hand, PFPEs have been demonstrated to be nonbioaccumulative and nontoxic and thus considered as an alternative for conventional long perfluoroalkyl chains to avoid safety, environmental, and health risks. On the other hand, PFPEs exhibit low surface energy similar to that of polymers with long perfluoroalkyl chains. , Moreover, PFPEs show very low glass transition temperatures ( T g , −120 to −70 °C) and high flexibility due to the presence of ether bonds. Therefore, PFPEs have recently attracted much attention, especially as high-performance coating materials.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, PFPEs exhibit low surface energy similar to that of polymers with long perfluoroalkyl chains. 14,15 building block to incorporate into not only the main chain of fluorinated polymers, such as polyurethanes, polyesters, and polycarbonates, but also into side chains, such as poly(meth)acrylates and polystyrenes. Poly(meth)acrylates based on perfluoropolyether have been extensively studied in recent years due to the high reactivity of (meth)arylates and the excellent properties of the polymers.…”

Section: ■ Introductionmentioning

confidence: 99%

Synthesis and Characterization of High-Performance Polymers Based on Perfluoropolyalkyl Ethers Using an Environmentally Friendly Solvent

Dong

Wang

et al. 2020

Langmuir

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In comparison with polymers containing long perfluoroalkyl chains (C n F 2n+1 , n ≥ 8), perfluoropolyalkyl ethers (PFPEs) have been demonstrated to be environmentally friendly polymeric materials. Thus, PFPEs are expected to be alternatives to long perfluoroalkyl chain polymers. However, due to the poor solubility in common organic solvents they are generally prepared and used in fluorinated solvents, which can also cause harmful impacts on the environment. Therefore, it is urgent to explore a strategy for the preparation of high-performance PFPE polymers using environmentally friendly solvents. In this study, three kinds of novel methacrylate macromers bearing PFPE chains with low molar mass were designed and synthesized. The PFPE polymer coatings on polycarbonate plates were obtained by a combinational strategy of spin-coating and in situ photopolymerization of the macromers under UV irradiation. The results indicated that the polymer coatings could be prepared in nonfluorinated solvents, such as 2-propanol. Then the surface properties of the polymer coatings were investigated. It was found that the surface properties of the polymer coatings were related to the structures of the polymers. When CONH-C 6 H 4 as a spacer was incorporated between the backbone and the PFPE chain, the hydrophobicity and oleophobicity of the polymer coatings were significantly enhanced, which is attributed to hydrogen bonds and π−π interaction between the PFPE chains. It is obvious that the synergetic effect of hydrogen bonds and π−π interaction can facilitate the PFPE chains to form a more stable fluorine-rich surface of the polymer coatings. Therefore, synthesis of a high-performance PFPE polymer has been successfully achieved based on PFPEs using an environmentally friendly solvent.

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Environmentally-friendly short-chain perfluoropolyether polyacrylates emulsion films for high water barrier coating applications

Jin

Tian²,

Li³

et al. 2022

Polymer

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Coating properties of UV-curable polyurethane acrylate composites with lotus leaf powder

Cited by 5 publications

References 10 publications

The Synergistic Effect of Terminal and Pendant Fluoroalkyl Segments on Properties of Polyurethane Latex and Its Film

The Synergistic Effect of Terminal and Pendant Fluoroalkyl Segments on Properties of Polyurethane Latex and Its Film

Synthesis and Characterization of High-Performance Polymers Based on Perfluoropolyalkyl Ethers Using an Environmentally Friendly Solvent

Environmentally-friendly short-chain perfluoropolyether polyacrylates emulsion films for high water barrier coating applications

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