Synthesis and characterization of waterborne polyurethane/ZnO composites

Soares, Rafael R; Carone, Carlos Leonardo Pandolfo; Einloft, Sandra; Ligabue, Rosane Angélica; Monteiro, Wesley F.

doi:10.1007/s00289-014-1095-4

Cited by 29 publications

(30 citation statements)

References 24 publications

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“…Figure b shows the band region corresponding to the stretching of the ester COC bond (1155 cm −1 ) of the soft segment of the polyurethane chain . The intensity of this band is smaller for the TNT‐TEOS/PU nanocomposite compared to the pure PU, besides the appearance of a shoulder (1185 cm −1 ) indicating that there is an interaction between the filler and the soft segments …”

Section: Resultsmentioning

confidence: 97%

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Preparation of Modified Titanate Nanotubes and Its Application in Polyurethane Nanocomposites

Monteiro

Santos

Einloft

et al. 2016

Macromolecular Symposia

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Summary This work presents the preparation of modified titanates nanotubes with tetraethyl orthosilicate (TNT‐TEOS) and their use in the synthesis of TNT‐TEOS/polyurethane nanocomposite by in situ polymerization. The filler was added in a proportion of 1% (w/w) relative to the polyol weight. The TNT‐TEOS presented a specific surface area of 127 m2/g lower than that obtained for TNT (177 m2/g). The addition of TNT‐TEOS in a polyurethane matrix promoted an increase in thermal stability of the polymer when compared to the pure PU and in crystallinity as observed by increase in melting and crystallization enthalpies. This effect can be attributed to good filler dispersion into polymer matrix and the interaction between the filler and the soft segments of the polyurethane.

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Section: Resultsmentioning

confidence: 97%

“…The polyurethane matrices are also suitable for the addition of different fillers such as zinc oxide and titanium dioxide particles, among others with consequent increase on its properties such as mechanical and thermal stability besides the possibility of attain hydrophilic behavior …”

Section: Introductionmentioning

confidence: 99%

Preparation of Modified Titanate Nanotubes and Its Application in Polyurethane Nanocomposites

Monteiro

Santos

Einloft

et al. 2016

Macromolecular Symposia

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“…On the other hand, nano-zinc oxide, known as a semiconductor photo-catalyst, can be used to improve the antibacterial performance of polymers as a filler. [13] Previously, the common way is that only one of them was used to composite with polymers at a time. In this research, both of them were successfully introduced into the WPU matrix.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the composites can even obtain an excellent antibacterial property when it composites with photocatalytic nanomaterials such as TiO 2 [12] and ZnO. [13,14] For example, nanocomposites consist of multiwall carbon nanotubes (CNTs) and WPU have been successfully prepared. [1] The CNTs were effectively dispersed in the waterborne polyurethane matrix.…”

Section: Introductionmentioning

confidence: 99%

Waterborne polyurethane/NiAl‐LDH/ZnO composites with high antibacterial activity

Xiong

Zhang

Shi

et al. 2015

Polymers for Advanced Techs

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Novel waterborne polyurethane (WPU) composites based on NiAl-LDH and ZnO were successfully synthesized by in-situ polymerization. The nanostructured NiAl-LDH/ZnO was first grafted by isophorone diisocyanate (IPDI), forming the NiAl-LDH/ZnO-NCO complex with -NCO group on the surface, which promotes its homogeneous dispersion in WPU matrix. The microstructure and particle distribution of the composites were characterized. The mechanical properties and the water resistance of the composites were improved. Furthermore, the composites also exhibit significant antibacterial activity towards G(À) Escherichia coli and G(+) Staphylococcus aureus.

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“…DPU based nanocomposites have been of great interest, since the added particles (inorganic/organic), besides approaching the DPU properties with conventional PU, add inherent properties to the fillers . Recent publications of PU nanocomposites development using gold and silver nanoparticles, cellulose nanofibers, silica nanoparticles, silica‐titania core‐shell nanoparticles, silver, and copper nanoparticles are some examples of importance of these theme in the literature.…”

Section: Introductionmentioning

confidence: 99%

Thermal, Mechanical, and Morphological Properties of DPU/Titanate Nanotubes Nanocomposites

Lima

Monteiro

Hoffmann

et al. 2019

Macromolecular Symposia

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Nanocomposites of Titanates Nanotubes (TNTs) and waterborne polyurethane were prepared by physical mixture using ultra turrax disperser. TNTs were synthesized by hydrothermal method and added in different contents: 1, 3, and 5% w/w in relation to polymer weight. Films were prepared and characterized by DSC, TGA, DMA and SEM. The increase of fillers content reduced the thermal stability of DPU nanocomposites compared to pure DPU and did not modify the glass transition temperature. To mechanical properties, the addition of 3% and 5% of TNT increased the Young's modulus when compared with pure DPU, but nanocomposite with 1% of TNT presented a decrease in Young's modulus. The stress × strain curves of DPU/TNT 5% presented characteristic behavior of rigid material, with low deformation, unlike other nanocomposites and pure DPU. SEM and TGA analysis proves that the preparation method used promoted the incorporation and good filler dispersion in the polymer matrix.

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Synthesis and characterization of waterborne polyurethane/ZnO composites

Cited by 29 publications

References 24 publications

Preparation of Modified Titanate Nanotubes and Its Application in Polyurethane Nanocomposites

Preparation of Modified Titanate Nanotubes and Its Application in Polyurethane Nanocomposites

Waterborne polyurethane/NiAl‐LDH/ZnO composites with high antibacterial activity

Thermal, Mechanical, and Morphological Properties of DPU/Titanate Nanotubes Nanocomposites

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