Citric Acid and Vitamin C as Coupling Agents for the Surface Coating of ZrO2 Nanoparticles and Their Behavior on the Optical, Mechanical, and Thermal Properties of Poly(vinyl alcohol) Nanocomposite Films

Mallakpour, Shadpour; Ezhieh, Ahmadreza Nezamzadeh

doi:10.1007/s10924-017-1170-7

Cited by 19 publications

(5 citation statements)

References 41 publications

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“…Thus, the nanocomposite showed WCA of 165 which is the highest value obtained as compared to other nanocomposites. It confirms that, this coating shows superior hydrophobicity and it does not pave the route for water molecules to enter into the alloy interface [54][55][56][57]. The chemical bonding between GO layered structure and functionalized BAO/NiS 2 is increased by interacting BAO.…”

mentioning

confidence: 68%

RETRACTED: Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

Xavier

2023

J of Applied Polymer Sci

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The anticorrosion, flame retardant, and mechanical properties of polyurethane (PU) coatings have been improved by the integration of nickel disulfide (NiS2), 2,5‐Bis(4‐aminophenyl)‐1,3,4‐oxadiazole (BAO), and graphene oxide (GO). The structural, morphological, dielectric, and hydrophobic behaviors of the films were characterized for the different formulations of coatings such as pure PU, PU‐NiS2, PU‐BAO/NiS2, PU‐GO/NiS2, and PU‐GO/BAO‐NiS2 (nanocomposite) by means of scanning electron microscope/X‐ray energy dispersive spectroscopy, transmission electron microscope, thermogravimetric analysis, X‐ray photoelectron spectroscopy, X‐ray diffraction, and contact angle measurement. As a result, with the addition of only 0.3% GO/BAO‐NiS2, the dielectric constant of PU was increased by 81‐fold at 1 Hz. Additionally, the nanocomposite had significantly lower peak heat release rate and overall heat released values than pure PU, a difference of 57% and 51%, respectively, demonstrating its greater flame retardancy. The electrochemical techniques and mechanical testing confirmed that GO/BAO‐NiS2 (0.3%) composite exhibit enhanced anticorrosive, hydrophobic, flame retardancy, and mechanical performance of the PU coating. The super hydrophobic behavior is confirmed by its water contact angle of 165°. Furthermore, the resistance of the nanocomposite was found to be much higher (16,985.6 kΩ.cm2) than that of the pure PU (145.4 kΩ.cm2) and the microhardness and tensile strength were increased sharply. Therefore, the nanocomposite could act as a potential coating material for industrial applications.

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mentioning

confidence: 68%

RETRACTED: Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

Xavier

2023

J of Applied Polymer Sci

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“…The ZrO 2 nanoparticles were synthesized by hydrolysis and condensation reaction of ZCB in alkaline solutions followed by thermal treatment, resulting in abundant carbonate and hydroxyl groups on the surface of ZrO 2 particles. The CA molecules were then grafted via the esterification with hydroxyl groups on the surface of ZrO 2 nanoparticles and the modification was confirmed via the FTIR measurements. − Theoretically, the coverage of CA on ZrO 2 depends on the ratio of CA and hydroxyl groups on the ZrO 2 nanoparticles. In our work, excess CA molecules were used to completely cover the ZrO 2 nanoparticles with rich hydroxyl groups.…”

Section: Resultsmentioning

confidence: 99%

“…Organic–inorganic nanocomposites have a wide range of applications in various fields, which can improve the mechanical properties, electrical properties, and optical properties of the materials. − Transparent nanocomposite films with tunable RI values have been developed by adding inorganic components such as ZrO 2 nanoparticles − and TiO 2 nanoparticles , into organic polymer matrix. The dispersion state of functional nanoparticles in the emulsion is the key to the creation of high-quality WPU coating films with desired optical performances, − while the aggregation of the particles will cause the scratch on the surface of the polymer substrate and the appearance of bubbles around the particles in the process of stretching into film, resulting in uneven thickness and low visible light transmission. − …”

Section: Introductionmentioning

confidence: 99%

Ultrastable Waterborne Nanocomposite Coating of Polyurethane and Zirconia Nanoparticles To Avoid Rainbow Effect on Polyester-Based Superficial Hardening Films

Liu,

Wang,

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Transparent nanocomposites constructed by adding ultrasmall inorganic nanoparticles into an organic polymer matrix have been a new paradigm for preparing functional films for various optical components. Herein, aiming to avoid the negative influences of the rainbow effect on polyester film optoelectronic devices, a transparent nanocomposite of waterborne polyurethane (WPU) and ZrO 2 nanoparticles is reported. The water-dispersible nanoparticles of ZrO 2 modified with citric acid (CA) are first synthesized, which ensures homogeneous blending of ZrO 2 nanoparticles and WPU emulsions. The ZrO 2 @CA nanoparticles can be well dispersed in the alkaline aqueous solution with a solid content of 5 wt %. The ZrO 2 /WPU hybrid films exhibit high transparency of visible light and the products of polyester-based hard coating films without rainbow effect are successfully prepared by using the ZrO 2 /WPU hybrid films as a functional layer for interference cancellation. This work demonstrates an efficient approach for developing water-dispersible ultrasmall ZrO 2 nanoparticles and nanoparticle-derived transparent nanocomposites for advanced applications in optics.

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“…However, increase in the STiO 2 content results in a decrease of the water uptake from 58 to 51%. The addition of STiO 2 rigidi es chitosan molecules, thus making it less capable of adsorbing solvent molecules [30]. The columbic and hydrogen bonding interactions between the -SO 3 H groups of STiO 2 and the -NH 2 and -OH groups of chitosan also reduce the water adsorption capacity of C/STiO 2 nanocomposite membranes.…”

Section: Thermal and Mechanical Stability Of C/stio 2 Nanocomposite Mmentioning

confidence: 99%

“…They have been widely utilized in different elds such as ultra ltration, pervaporation, dye-sensitized solar cells, lithium-ion batteries and biosensors [24][25][26][27][28] . Various inorganic llers, such as TiO 2 , zirconium oxide, halloysite, and graphene oxide have been introduced into the polymer matrix for the fabrication of PEMs to improve their mechanical and thermal stabilities as well as the proton conductivity [29][30][31][32][33][34] . Incorporating acid-grafted inorganic llers into the polymer matrix can also increase the proton conductivity and the interfacial compatibility of the composite membranes [35][36][37][38][39][40][41] .…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of a novel sulfonated titanium oxide incorporated Chitosan nanocomposite membranes for fuel cell application

Ahmed

Hussain

Arshad

et al. 2021

Preprint

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In this study, nano-TiO2 sulfonated (STiO2) with 1,3-propanesultone was incorporated into the chitosan matrix for the fabrication of chitosan/STiO2 (C/STiO2) nanocomposite membranes. The grafting of sulfonic acid (–SO3H) groups was confirmed with Fourier transform infrared spectroscopy, thermos-gravimetric analysis and energy-dispersive X-ray spectroscopy. The physicochemical properties such as water uptake, swelling ratio, thermal and mechanical stability, ion exchange capacity and proton conductivity of the as prepared membranes were measured. The proton groups on the surface of TiO2 can form continuous proton conducting pathways along the C/STiO2 interface resulting in the improvement of proton conductivity of C/STiO2 nanocomposite membranes. The nanocomposite membrane with 5 % sulfonated TiO2 showed higher proton conductivity (0.035 S·cm-1) than commercial Nafion-117 membrane (0.033 S·cm-1) due to the strong interfacial interactions between -SO3H group of acid and hydroxyl group of TiO2. Further, the –NH2 groups of chitosan restrict the mobility of chitosan chains to enhance the thermal and mechanical stability of the nanocomposite membranes. These C/STiO2 nanocomposite membranes have promising applications in proton exchange membrane fuel cells.

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Citric Acid and Vitamin C as Coupling Agents for the Surface Coating of ZrO2 Nanoparticles and Their Behavior on the Optical, Mechanical, and Thermal Properties of Poly(vinyl alcohol) Nanocomposite Films

Cited by 19 publications

References 41 publications

RETRACTED: Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

RETRACTED: Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

Ultrastable Waterborne Nanocomposite Coating of Polyurethane and Zirconia Nanoparticles To Avoid Rainbow Effect on Polyester-Based Superficial Hardening Films

Preparation and characterization of a novel sulfonated titanium oxide incorporated Chitosan nanocomposite membranes for fuel cell application

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