Composites prepared from the waterborne polyurethane cationomers-modified graphene. Part II. Electrical properties of the polyurethane films

Król, Piotr; Zenker, M.; Subocz, J.

doi:10.1007/s00396-015-3697-2

Cited by 15 publications

(11 citation statements)

References 13 publications

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“…In the case of membrane with 30 wt% IL, ionic conductivity increased from the order of 10 -10 to the order of 10 -5 S cm -1 as temperature increased from -10 to 100°C [50]. The introduction of carbon nanotubes additionally increases the electrical conductivity of polyurethane coatings and independently contributes to the increase in thermal and mechanical properties, as demonstrated in few papers [13,46].…”

Section: Special Applications Of Pu Ionomersmentioning

confidence: 94%

Structures, properties and applications of the polyurethane ionomers

Król

2019

J Mater Sci

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On the basis of the reports from 2010 to 2018, the chemical structure, production methods and applications of polyurethane ionomers were reviewed. The paper presents ionogenic reagents and counterions responsible for the incorporation of anionic and cationic groups into polyurethane chains and the resulting physicochemical properties of these polymers. The most important applications of synthesized ionomers as a waterborne polyurethane, elastomer materials, biomaterials and materials for special applications (electronics, nanocomposites) were presented. Abbreviations PUPolyurethane PUI Polyurethane ionomer PUD Polyurethane dispersion WPU Waterborne polyurethane HMDI 4,4 0 -Methylene bis(cyclohexyl isocyanate) MDI 4,4 0 -Methylenebis(phenyl isocyanate) HDI 1,6-Hexamethylene diisocyanate IPDI Isophorone diisocyanate PTMO Polytetramethylene glycol PCD Polycarbonate diol POG Polyethylene glycol PPG Polypropylene glycol PCL Poly(e-caprolactone) diol PLA Polylactide diol PDMS Poly(dimethylsiloxane) DMPA 2,2-Bis(hydroxymethyl)propionic acid DMBA 2,2-Bis(hydroxymethyl)butyric acid

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Section: Special Applications Of Pu Ionomersmentioning

confidence: 94%

Structures, properties and applications of the polyurethane ionomers

Król

2019

J Mater Sci

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“…Graphene has emerged as an interesting reinforcement candidate because of its extraordinary thermal, mechanical, and electronic properties [12]. The incorporation of graphene [13] and reduced graphene oxide [14][15][16] in a WPU matrix has been reported to improve the electrical, thermal, mechanical, and barrier properties of its nanocomposites. However, these nanomaterials tend to agglomerate through van der Waals interactions that may compromise their good dispersion in the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Composite Films of Waterborne Polyurethane and Few-Layer Graphene—Enhancing Barrier, Mechanical, and Electrical Properties

Cunha

Paiva

2019

J. Compos. Sci.

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Graphene has excellent mechanical, thermal, and electrical properties. Graphene can serve as potential reinforcement in polymer-based nanocomposites. In order to achieve this goal, graphene has to be distributed homogeneously and dispersed throughout the polymer matrix, establishing a strong interface with the polymer. Solution mixing is an interesting method for the preparation of homogeneous nanocomposites, in particular when using environmentally friendly solvents such as water. The major difficulty met in the production of graphene/polymer composites concerns the preparation and stabilization of graphene in aqueous suspension. In the present work three different graphite-based materials, with different crystallinity and purity grades, were exfoliated in aqueous solution of an amphiphilic pyrene derivative, forming few-layer graphene (FLG). The FLG prepared was dispersed in waterborne polyurethane (WPU) to produce composite films. The composite films were produced by solvent casting and spray coating, forming free-standing films that were characterized in terms of its distribution of FLG through the composite, its permeability to water vapor, its electrical resistivity, and its mechanical properties. The studies demonstrated the influence of different factors on the composite film properties such as the use of graphite vs. FLG, the FLG lateral dimensions, and the FLG composition and composite preparation method.

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“…In situ polymerization is the most effective way of improving the dispersion and exfoliation of graphene in a matrix and can create a covalent bonding interface between graphene and the matrix; however, the polymerization process is usually accompanied by a viscosity increase that hinders manipulation and limits the load fraction. To resolve these issues, Piotr Król et al . reported that the multistep method of synthesis of the polyurethane cationomer was allowed at the stage of synthesis of the isocyanate prepolymer to introduce graphene in the form of a suspension in tetrahydrofuran (THF) to prepare PU/graphene nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Latex co‐coagulation approach to fabrication of polyurethane/graphene nanocomposites with improved electrical conductivity, thermal conductivity, and barrier property

Shi

Zhang³

2015

J of Applied Polymer Sci

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This study describes a simple and effective method of synthesis of a polyurethane/graphene nanocomposite. Cationic waterborne polyurethane (CWPU) was used as the polymer matrix, and graphene oxide (GO) as a starting nanofiller. The CWPU/GO nanocomposite was prepared by first mixing a CWPU emulsion with a GO colloidal dispersion. The positively charged CWPU latex particles were assembled on the surfaces of the negatively charged GO nanoplatelets through electrostatic interactions. Then, the CWPU/chemically reduced GO (RGO) was obtained by treating the CWPU/GO with hydrazine hydrate in DMF. The results of X‐ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and Raman analysis showed that the RGO nanoplatelets were well dispersed and exfoliated in the CWPU matrix. The electrical conductivity of the CWPU/RGO nanocomposite could reach 0.28 S m−1, and the thermal conductivity was as high as 1.71 W m−1 K−1. The oxygen transmission rate (OTR) of the CWPU/RGO‐coated PET film was significantly decreased to 0.6 cm3 m−2 day−1, indicating a high oxygen barrier property. This remarkable improvement in the electrical and thermal conductivity and barrier property of the CWPU/RGO nanocomposite is attributed to the electrostatic interactions and the molecular‐level dispersion of RGO nanoplatelets in the CWPU matrix. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43117.

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Composites prepared from the waterborne polyurethane cationomers-modified graphene. Part II. Electrical properties of the polyurethane films

Cited by 15 publications

References 13 publications

Structures, properties and applications of the polyurethane ionomers

Structures, properties and applications of the polyurethane ionomers

Composite Films of Waterborne Polyurethane and Few-Layer Graphene—Enhancing Barrier, Mechanical, and Electrical Properties

Latex co‐coagulation approach to fabrication of polyurethane/graphene nanocomposites with improved electrical conductivity, thermal conductivity, and barrier property

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