Preparations and properties of waterborne polyurethane/allyl isocyanated-modified graphene oxide nanocomposites

“…The incorporation of carbon nanotubes [10][11][12][13][14][15] and nanoclays [16][17][18] has lead to significant improvements of these polymer characteristics. First publications on graphene based materials (graphene, functionalized graphene, graphene oxide) also report on reinforcing effects in TPU [19][20][21][22][23][24][25]. Various compounding approaches were taken: Melt mixing [25], solution mixing [20][21][22][23][24][25], and in-situ polymerization [19,25].…”

Section: Introductionmentioning

confidence: 99%

“…First publications on graphene based materials (graphene, functionalized graphene, graphene oxide) also report on reinforcing effects in TPU [19][20][21][22][23][24][25]. Various compounding approaches were taken: Melt mixing [25], solution mixing [20][21][22][23][24][25], and in-situ polymerization [19,25]. From an industrial point of view, the most economically viable method is melt mixing.…”

Section: Introductionmentioning

confidence: 99%

The effect of ultra-thin graphite on the morphology and physical properties of thermoplastic polyurethane elastomer composites

Menes

Cano

Benedito

et al. 2012

Composites Science and Technology

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Composites of thermoplastic polyurethane (TPU) and ultra-thin graphite (UTG) with concentrations ranging from 0.5 to 3 wt% were prepared using a solution compounding strategy. Substantial reinforcing effects with increased loadings are achieved. Compared to neat TPU, values for storage modulus and shear viscosity are enhanced by 300 % and 150 %, respectively, for UTG concentrations of 3 wt%. Additionally, an enhancement of thermal properties is accomplished. The crystallization temperature and thermal stability increased by 30 ºC and 10 ºC, respectively, compared to neat TPU. Controlling the oxidation degree, thus offers further possibilities to obtain composites with tailored properties. The presented approach is straightforward, leads to homogeneous TPU-UTG composites with improved materials properties and is especially suitable for commercial UTG materials and further up-scaled production.

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“…The decrease of the mechanical properties above a certain GO content was observed in many studies 26,27) . In many studies 13,18,19,28,29) , the incorporation of GO or functionalized graphene results in the decreased EB. Thus, it is meaningful that both stiffness and toughness increase with the incorporation of GO nanosheets in this study.…”

Section: Resultsmentioning

confidence: 99%

“…Yoon et al prepared a WPU/isocyanate modied GO nanocomposite 18) . They observed increased stiffness and thermal stability but decreased elongation-at-break with the incorporation of GO in WPU.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties, Thermal Stability, and Glass Transition Behaviors of a Waterborne Polyurethane/Graphene Oxide Nanocomposite

2017

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We synthesized anionic waterborne polyurethane (aWPU) from IPDI (di-isocianate), PTMG (diol), DMPA (anionic ionomer), TEA (neutralizer), and BD (chain extender). Cationic WPU (cWPU) was also prepared using MDEA (cationic ionomer) and HCl (neutralizer) instead of DMPA and TEA. Since the graphene oxide (GO) is anionic due to the -COOH group, GO and aWPU are not compatible because of the repulsive force between identical ionic charges. Thus, we fabricated cationic surfactant treated GO/aWPU to increase the compatibility. cWPU/GO, where attractive forces act between anionic GO and cationic WPU, was also prepared. The thermal stability, glass transition temperature, and mechanical properties of the nanocomposites were investigated. The thermal stability of the WPU was enhanced with the incorporation of GO nanosheets. The glass transition temperature of the hard segment of WPU was increased by the incorporation of GO. These results are attributed the ne dispersion of GO in WPU and strong interfacial interactions between GO and WPU. Enhanced dispersion and interfacial interaction lead to better mechanical properties. Tensile strength, initial modulus, and elongation-at-break of WPU/GO nanocomposites were increased with the incorporation of GO nanosheets. By a simple method (anion-cation matching) we could prepare WPU/GO nanocomposites with enhanced stiffness and toughness.

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Preparations and properties of waterborne polyurethane/allyl isocyanated-modified graphene oxide nanocomposites

Cited by 42 publications

References 22 publications

Synthesis and shape memory performance of polyurethane/graphene nanocomposites

Synthesis and shape memory performance of polyurethane/graphene nanocomposites

The effect of ultra-thin graphite on the morphology and physical properties of thermoplastic polyurethane elastomer composites

Mechanical Properties, Thermal Stability, and Glass Transition Behaviors of a Waterborne Polyurethane/Graphene Oxide Nanocomposite

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