Preparation and characterization of waterborne polyurethane nail enamel modified by silane coupling agent

Peng, Xiaoxiao; Liu, Yanping; Xin, Binjie; Guo, Haitao; Yu, Yunge

doi:10.1007/s11998-020-00358-9

Cited by 15 publications

(9 citation statements)

References 24 publications

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“…The contact angle decreases when KH550 is introduced excessively. This is because the degree of microphase separation of the soft and hard segments of the modified CWPU becomes larger, the continuous and dense surface is destroyed, and the water droplets are easy to spread on the surface of the film, which reduces the hydrophobicity of the film 24 …”

Section: Resultsmentioning

confidence: 99%

“…More importantly, the urea groups contained in the main chain of the modified CWPU have strong hydrogen bonding between each other, which restricts the movement of the molecular chain, and the hydrophilic group ‐COOH is difficult to appear in the films surface. The reduction of hydrophilic groups on the surface of the film will cause the particle size of the emulsion to become larger 24 . In addition, the SiOC 2 H 5 groups in KH550 are hydrolyzed to form SiOSi cross‐linked structure, which increases the particle size of the emulsion.…”

Section: Resultsmentioning

confidence: 99%

“…This is because the degree of microphase separation of the soft and hard segments of the modified CWPU becomes larger, the continuous and dense surface is destroyed, and the water droplets are easy to spread on the surface of the film, which reduces hydrophobicity of the film. 24 It can be seen from Figure 9b that the water absorption rate of the modified film shows a trend of first decreasing and increasing. The modified sample (CWPU-3%) has the smallest water absorption and the largest contact angle.…”

Section: Contact Angle and Water Absorptionmentioning

confidence: 90%

“…The reduction of hydrophilic groups on the surface of the film will cause the particle size of the emulsion to become larger. 24 In addition, the Si O C 2 H 5 groups in KH550 are hydrolyzed to form Si O Si cross-linked structure, which increases the particle size of the emulsion. The gradual increase in the number of KH550 molecules in CWPU leads to higher and higher degree of hydrolysis and cross-linking of the emulsion after dispersion, resulting in a larger emulsion particle size.…”

Section: Nano-emulsion Performance Analysismentioning

confidence: 99%

See 3 more Smart Citations

Environmentally friendly plant‐based waterborne polyurethane for hydrophobic and heat‐resistant films

Wang

Zhang

Shi

et al. 2022

J of Applied Polymer Sci

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Waterborne polyurethane (WPU) is an environmentally friendly material using water as dispersion medium. However, it is significantly restricted that most of the soft segments in WPUs come from oil. In this work, environmentally friendly and low‐cost castor oil is used as the soft segment of polyurethane, and KH550 modification could improve the thermal stability and flexibility of CWPU. The results show that the particle size of the modified CWPU nano‐emulsion gradually increased to 60.48 nm. Through FTIR and XPS analysis, KH550 is successfully introduced into the castor oil‐based waterborne polyurethane system. After the CWPU‐3% film is treated with NaCl, NaOH, HCl solution and high temperature, the groups in the system remain unchanged which shows CWPU‐3% film having good chemical resistance and high temperature resistance. When the addition amount of KH550 is 3%, the maximum contact angle of the CWPU film was 92.39° which reveals good hydrophobic property. The tensile strength of the films increased from 10.2 MPa to 12.8 MPa, and the elongation at break decreased from 841.3% to 658.9%. The thermal stability of the CWPU films modified by KH550 were also improved. The modified CWPU film has excellent hydrophobicity, chemical resistance and temperature resistance.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Contact Angle and Water Absorptionmentioning

confidence: 90%

Section: Nano-emulsion Performance Analysismentioning

confidence: 99%

See 2 more Smart Citations

Environmentally friendly plant‐based waterborne polyurethane for hydrophobic and heat‐resistant films

Wang

Zhang

Shi

et al. 2022

J of Applied Polymer Sci

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“…Waterborne colloidal polymers, called latex, are used as the binder material in films applied in a range of sectors: infrastructure (Jiang et al, 2017) and automotive (Nobel et al, 2007) (as protective coatings), packaging (in adhesives and binders) (Chen et al, 2015), printing (in inks) (Zhang et al, 2012), cosmetics (e.g., in nail varnish) (Peng et al, 2020), agriculture (to contain active ingredients in coatings) (Mulqueen, 2003;Pedrini et al, 2017), and pharmaceuticals (e.g., encapsulants (Lecomte et al, 2004)). Latex films have been growing in use over the past several decades because primarily water evaporates from them during their deposition and film formation, unlike coatings with an organic solvent carrier, which emit volatile organic compounds (VOCs) into the environment.…”

Section: Introductionmentioning

confidence: 99%

Environmental Effects on the Coefficient of Friction and Tack Adhesion of Formulated Waterborne Coatings

et al. 2022

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Waterborne coatings emit a low amount of harmful volatile organic compounds (VOCs) into the atmosphere compared to solvent-cast coatings. A typical waterborne formulation for agricultural applications consists of colloidal thermoplastic particles (latex) as the binder, a thickener to raise the viscosity, inorganic filler particles with a water-soluble dispersant, and a colloidal wax to modify surface properties. The formulations typically contain hygroscopic species that are potentially subject to softening by environmental moisture. The hardness, tack adhesion, and coefficient of friction of formulated coatings determines their suitability in applications. However, the relationship of these properties to the components in a coating formulation has not been adequately explored. Furthermore, the relationship between hygroscopic components and properties is an added complication. Here, we have characterized the hardness and tack adhesion of model formulated coatings using a single micro-indentation cycle with a conical indenter under controlled temperatures (above and below the glass transition temperature of a latex binder) and relative humidities. In parallel, we measured the coefficient of kinetic friction, μk, for the same coatings using a bespoke testing rig under controlled environmental conditions. Across a range of temperatures, RH and compositions, we find an inverse correlation between the coating hardness and μk. Any correlation of μk with the roughness of the coatings, which varies with the composition, is less clear. Formulations that contain wax additives have a higher μk at a low RH of 10%, in comparison to formulations without wax. For the wax formulations, μk decreases when the RH is raised, whereas in non-wax formulations, μk increases with increasing RH. Wax-containing coatings are hydrophilic (with a lower water contact angle), however the wax has a lower water permeability. A lubricating layer of water can explain the lower observed μk in these formulations. The addition of wax is also found to planarize the coating surface, which leads to higher tack adhesion in dry coatings in comparison to coatings without wax. Greater adhesive contact in these coatings can explain their higher friction. Our systematic research will aid the design of seed coating formulations to achieve their optimum properties under a wide range of environmental conditions.

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CO2-triggered hydrophobic/hydrophilic switchable waterborne polyurethane–acrylate with simultaneously improved water resistance and mechanical properties

Wang

Yang

et al. 2021

J Coat Technol Res

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Preparation and characterization of waterborne polyurethane nail enamel modified by silane coupling agent

Cited by 15 publications

References 24 publications

Environmentally friendly plant‐based waterborne polyurethane for hydrophobic and heat‐resistant films

Environmentally friendly plant‐based waterborne polyurethane for hydrophobic and heat‐resistant films

Environmental Effects on the Coefficient of Friction and Tack Adhesion of Formulated Waterborne Coatings

CO2-triggered hydrophobic/hydrophilic switchable waterborne polyurethane–acrylate with simultaneously improved water resistance and mechanical properties

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