Dispersion and parallel assembly of sulfonated graphene in waterborne epoxy anticorrosion coatings

Li, Zhenwei; Li, Jing; Cui, Jincan; Qiu, H.; Yang, Guangzhi; Zheng, Shiyou; Yang, Jing

doi:10.1039/c9ta03995c

Cited by 61 publications

(35 citation statements)

References 45 publications

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“…In this way, the aim of this work was to determine the minimum PEG content in the synthesized WBPUU dispersion at which the properties of the final material change significantly, in order to demonstrate that the incorporation of different contents of PEG could be a suitable strategy to modulate the final properties of the dispersions and films. The synthesized dispersions could be employed in VOCs free coatings or adhesives, as well as base for the preparation of environmentally friendly functional coatings by means of the incorporation of water dispersible nonentities and additives . As explained before, the solid content of the dispersion is a key parameter in order to obtain either dispersions or gels, hence in this work the solid content was maintained low enough (25 wt %) to avoid gelification so as to study both dispersions and films.…”

Section: Introductionmentioning

confidence: 92%

Influence of the addition of PEG into PCL‐based waterborne polyurethane‐urea dispersions and films properties

Vadillo

Larraza²,

Arbelaiz³

et al. 2019

J of Applied Polymer Sci

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In this work, segmented waterborne polyurethane‐urea (WBPUU) dispersions containing hydrophobic polycaprolactone (PCL) and hydrophilic poly(ethylene glycol) (PEG) in different molar ratios are synthesized and used for the subsequent preparation of films by casting. The molar ratio of PEG is gradually increased up to 0.20 in order to analyze the effect of low hydrophilic PEG content (from 1.7 to 7.1 wt %) on the properties of resulting dispersions and films. Regarding the dispersions, the addition of PEG results in an increase of the particle size, from 86 ± 1 in the case of pure PCL‐based system to 112 ± 15 for systems containing 7.1 wt % of PEG, as well as in the formation of a core–shell structure in the particles. Films show different behaviors depending on their PEG content. WBPUUs containing just PCL or very low content of PEG in the soft segment present higher stiffness. However, the addition of PEG in a content of 3.4 wt % or higher hinder the ability of the short‐range ordering of the hard segment, increasing the elongation at break from 842 ± 102 MPa for PCL‐based WBPUU to 1312 ± 84 MPa for the system with the highest PEG content. Systems with higher PEG content form nanoparticles with more segregated core–shell structures inducing to the film a higher hydrophilicity. Hence, the addition of PEG to a PCL‐based WBPUU allows to tune the properties of the resulting film increasing the range of application of these materials. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48847.

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Section: Introductionmentioning

confidence: 92%

Influence of the addition of PEG into PCL‐based waterborne polyurethane‐urea dispersions and films properties

Vadillo

Larraza²,

Arbelaiz³

et al. 2019

J of Applied Polymer Sci

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“…The increase in mechanical properties with nanofiller loading was accredited to the compatibility and interfacial interaction between the graphene nanosheet and the WPU matrix due to chemical linkage. Li et al . developed WPU/reduced GO (RGO) nanocomposite coatings.…”

Section: Polyurethane/nanocarbon Nanocomposite Coatingsmentioning

confidence: 99%

“…The formation of a barrier network in turn restricted the permeation of foreign molecules through the coating. According to the proposed model, the anticorrosive properties of nanocomposite coatings can be attributed to the high aspect ratio of graphene and nanofiller dispersion in the matrix. Generally, the aspect ratio of graphene nanofiller is inversely related to the critical amount of graphene nanosheet involved in network formation.…”

Section: Polyurethane/nanocarbon Nanocomposite Coatingsmentioning

confidence: 99%

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Polyurethane nanocomposite coatings: state of the art and perspectives

Kausar

2018

Polymer International

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This paper offers a state‐of‐the‐art overview on vital aspects of polyurethane‐based nanocomposite coatings. Nano‐modified developments in polyurethane coatings have led to the current status and new opportunities for the formation of high performance coatings. Nanocarbon such as carbon nanotube, nanodiamond, graphene and its derivatives as well as inorganic nanoparticles have been employed as coating reinforcements. A brief description of various categories of polyurethane nanocomposite coatings is presented. Here, polyurethane/nanocarbon nanocomposites reveal multifunctional properties and high performance owing to the synergistic effect of polymer and nanofiller compared with neat polyurethane coatings and other nanocomposite coating materials. Incidentally, the type of nanoparticle, nanofiller content, polyurethane structure, processing technique and conditions may affect the final nanocomposite properties. The review also focuses on the worth of polyurethane nanocomposites in the coating sector. Consequently, the cutting edge application areas of polyurethane nanocomposite coatings such as corrosion protection, textiles, biomaterials and other technical fields are addressed. It is important to understand the challenges of weathering‐induced degradation in polyurethane nanocomposite coatings. The wide range of polyurethane nanocomposite coatings may be attained using versatility in the selection of monomeric materials. Moreover, modification of nanofillers and incorporation in appropriate polyurethane matrices can be adopted as a powerful tool to widen the applicability of nanocomposite coatings in advanced future applications. © 2018 Society of Chemical Industry

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“…In order to improve its performance, appropriate fillers, such as zinc powder, TiO 2 , and clay, have been incorporated into waterborne epoxy dispersions. Recently, graphene, as a new filler, has attracted great attention on anticorrosion performance …”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of few‐layer graphene modified waterborne epoxy coatings

Yuan

Zhao

Sun

et al. 2018

J of Applied Polymer Sci

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Few layer graphene (FLG) has been used to improve different properties of polymers. FLG‐modified waterborne epoxy dispersions were prepared using a hydrophilic epoxy oligomer (HEO‐144) as the surfactant, which was prepared using liquid epoxy resin and poly(ethylene glycol) (PEG4000) at a molar ratio of 1.0. To enhance the stability of FLG‐modified waterborne epoxy dispersions, fumed silica was added and best stability was reached at a fumed silica content of 1.5%. Thermogravimetric analyses demonstrated enhanced thermal stability of the epoxy films after FLG modification. With FLG content of 1.0%, T5% of the modified epoxy films has been increased to 332 °C from 275 °C. Water contact angle and adsorption tests showed improved water resistance with FLG, the water contact angle increased from 49.5° to 76.2° and water adsorption decreased from 9.0% to 2.0%. Furthermore, electrochemical impedance spectroscopy tests and tafel analysis indicated that FLG greatly improved the anticorrosion performance of waterborne epoxy coatings. With a FLG content of 1.0%, modified waterborne epoxy coatings demonstrated significantly low corrosion rate, which was one eighth of that of the unmodified control. These results indicate that FLG modification can be an effective and low cost approach to enhance the anticorrosion performance of waterborne epoxy coatings. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46743.

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Dispersion and parallel assembly of sulfonated graphene in waterborne epoxy anticorrosion coatings

Abstract: Graphene derivatives can function as a barrier reinforcement in waterborne epoxy (WEP) coatings.

Cited by 61 publications

References 45 publications

Influence of the addition of PEG into PCL‐based waterborne polyurethane‐urea dispersions and films properties

Influence of the addition of PEG into PCL‐based waterborne polyurethane‐urea dispersions and films properties

Polyurethane nanocomposite coatings: state of the art and perspectives

Preparation and properties of few‐layer graphene modified waterborne epoxy coatings

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