Enhancement in Corrosion Barrier Properties of Polyurethane Films on Steel by Embedding MgO Nanoparticles

Nguyen, Van Quyet; Lee, Hee-Dong; Jung, Hun Seok; Tai, Weon Pil; Lee, Jae‐Shin

doi:10.1166/jnn.2011.3346

Cited by 4 publications

(3 citation statements)

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“…A new peak was observed at 2,280 cm− 1 , indicating formation of –N=C=O when MgO NP were introduced into PU. Increase in MgO NP increased the absorption of –NCO band, indicating partial decomposition of PU (Nguyen et al, 2011). PU/MgO/Ag (see Figure 6B) showed CH 2 stretching at 2,950 cm− 1 , 1081 cm -1 (C-O-C stretching), 1,637 cm− 1 and 3,500 cm− 1 (bending mode of water molecules [HO-H] and OH, respectively), 1,750 cm− 1 (C=O stretching), 3,308 cm −1 (NH stretching) and 1,530 cm −1 (urethane amide II).…”

Section: Resultsmentioning

confidence: 99%

Electrospun PU/MgO/Ag Nanofibers for Antibacterial Activity and Flame Retardency

Mamtha¹,

Murthy²,

Raj³

et al. 2021

Clothing and Textiles Research Journal

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Antibacterial activity and fire retardation are equally desired for protective clothing. For achieving this, AgNP and MgO are independently researched as nanofillers in Polyurethane based electrospun nanofibers and their synergistic effect is scarcely addressed. This article reports synthesis and characterization of MgO of 70.01 nm and AgNP of 51 to 76 nm by solution combustion and hydrothermal routes respectively and their incorporation in electrospinning of Polyurethane. Flow rate 1 ml/hr, applied voltage 13 kV, tip to collector distance 15 cm were adopted for the electrospinning. Nanofibers of 65 nm were obtained for PU/MgO (3 wt. %) and 106 nm for PU/MgO (3 wt. %)/Ag (1 wt. %). Addition of MgO increased the melting point, after flame time and afterglow time. Incorporation of AgNP improved antibacterial activity. PU/MgO/Ag (2 wt. %) exhibited zone of inhibition of 2.1 cm and 3 cm against E. Coli and S. Aureus, respectively.

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Section: Resultsmentioning

confidence: 99%

Electrospun PU/MgO/Ag Nanofibers for Antibacterial Activity and Flame Retardency

Mamtha¹,

Murthy²,

Raj³

et al. 2021

Clothing and Textiles Research Journal

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“…In the case of PUs+MgO composites, nanostructured particles only slightly affect the soft segment glass transition temperature. According to study [11], it is probably due to the relatively low concentration of MgO nanoparticles in composites. For EPs+MgO can be stated, that the increased resin-filter interface created extra free volume and therefore aided in the large-scale segmental conversion of the polymer [12].…”

Section: Differential Scanning Calorimetry Measurementmentioning

confidence: 99%

Effect of MgO nanoparticles on material properties of cold-curing epoxy and polyurethane mixtures

Hornak

Prosr

Trnka

et al. 2021

Applied Physics of Condensed Matter (Apcom 2021)

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Potting compounds are an integral part of a large number of electrical devices, in which play the role of mainly mechanical or photosensitive protection. So-called cold-curing resins are one of the subgroups of potting mixtures. This article focuses on this type of potting compound based on epoxy (EPs) and polyurethane (PUs). In addition to the study of their electrical properties, structural properties are also introduced. The main focus of research is on the incorporation of nanometric magnesium oxide (MgO) in different weight ratios and the study of its effect on the properties of synthesized composites. The electrical properties analyses include the changes in relative permittivity, dielectric losses in the wide frequency range, and volume resistivity estimated at DC conditions. In terms of structural analyses, the effect of MgO incorporation on glass transition temperature changes was studied. From the performed investigations it is evident that the selected basic materials can be partially modified to improve their properties, especially in lower levels of filling, where there is a positive decrease of relative permittivity close to industrial frequency (≈3 % for EP+1MgO; ≈11 % for PU+1MgO). For investigated composites is also evident a trend in the growth of dielectric losses. MgO affects also the volume resistivity and glass transition temperature of EPs-MgO and PUs-MgO composites.

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“…Despite the above mentioned applications of magnesium oxide nanoparticles there still lie several more such as very minute amount of these nanoparticles are enough for improving corrosion retardation ability of polyurethane films and these nanoparticles in addition with nanofiltration membrane are capable of removing pollutants such as organic matter, nitrogen species, heavy metals, bacteria and suspended solid particles and make it suitable for drinking [14,83,84]. These nanoparticles have found a prominent place in waste water treatment because of the characteristics they possess such as high recovery and reproducibility, abrasiveness, electrostatic attraction, and oxidizing power combine to promote biocidal properties [85,86].…”

Section: Pesticide Degradation and Hydrogen Peroxide Biosensormentioning

confidence: 99%

Recent Applications of Magnesium Oxide (MgO) Nanoparticles in various domains

Fernandes¹,

Singh²,

Sarkar³

et al. 2020

Adv. Mater. Lett.

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Enhancement in Corrosion Barrier Properties of Polyurethane Films on Steel by Embedding MgO Nanoparticles

Cited by 4 publications

References 0 publications

Electrospun PU/MgO/Ag Nanofibers for Antibacterial Activity and Flame Retardency

Electrospun PU/MgO/Ag Nanofibers for Antibacterial Activity and Flame Retardency

Effect of MgO nanoparticles on material properties of cold-curing epoxy and polyurethane mixtures

Recent Applications of Magnesium Oxide (MgO) Nanoparticles in various domains

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