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Journal ArticleDOI

Dynamic mechanical analysis and broadband electromagnetic interference shielding characteristics of poly (vinyl alcohol)-poly (4-styrenesulfonic acid)-titanium dioxide nanoparticles based tertiary nanocomposites

TL;DR: Novel tertiary nanocomposite films comprising of poly (vinyl alcohol) (PVA), poly (4-styrenesulfonic acid) (PSSA) and titanium dioxide (TiO2) nanoparticles (NPS) were prepared using simple solvent as mentioned in this paper.
Abstract: Novel tertiary nanocomposite films comprising of poly (vinyl alcohol) (PVA), poly (4-styrenesulfonic acid) (PSSA) and titanium dioxide (TiO2) nanoparticles (NPS) were prepared using simple solvent ...
Citations
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Proceedings Article
01 Jun 1973

204 citations

Journal ArticleDOI
TL;DR: In this article, the photocatalytic and antibacterial properties of synthesized nanoparticles, PVA/TiO2 and PEG/NiO2 composites were determined using acid black I dye and E. coli bacteria, respectively.

74 citations

Journal ArticleDOI
TL;DR: Nanocomposite films with enhanced functional properties were prepared by loading titanium dioxide and/or zinc oxide nanoparticles within 4A zeolite (4AZ) particles, and then incorporating these nanocomposites into a poly (vinyl alcohol) (PVA) and gelatin matrix and exhibited significant antimicrobial effects especially against gram-negative bacteria.

45 citations

Journal ArticleDOI
TL;DR: In this article, the structural, thermal and mechanical properties of PVA/CS/GO/NiO nanocomposites were investigated using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analyzer (TGA), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA).
Abstract: Polyvinyl alcohol (PVA) and Chitosan (CS)-based novel composites were prepared using solution casting technique by introducing graphite oxide (GO) and nickel oxide (NiO) as nanofillers. The structural, thermal and mechanical properties of PVA/CS/GO/NiO nanocomposites were investigated using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analyzer (TGA), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The dielectric and electromagnetic interference (EMI) shielding properties of synthesized nanocomposites were also investigated. The addition of dual nanofillers in the PVA/CS blend resulted in improved thermal stability of nanocomposites through the interaction of nanofillers with OH groups of polymer matrices. The DMA results displayed higher storage and loss modulus at low temperature for nanocomposite with 1.5/15 wt% of GO/NiO loading. The maximum values of dielectric constant and dielectric loss obtained are 1315.5 and 11.1 at the low-frequency region, respectively. The absorption dominated EMI shielding effectiveness (SE) was observed with a maximum EMI SE value of 12 dB for nanocomposite film containing 3.0/30 wt% of GO/NiO as compared to EMI SE value of 0.3 dB for PVA/CS blend in Ku-band (12–18 GHz) region. The electrical network formation by GO and NiO in the polymer matrix resulted in an improved EMI SE which further emphasizes the potential use of these nanocomposite films as an effective EMI shielding material.

38 citations

References
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Journal ArticleDOI
TL;DR: A review of the recent work on polymer matrix nanocomposites is presented in this paper, where a number of composite systems with amorphous and/or crystalline polymer matrices and different nano-sized filler materials are discussed.
Abstract: A review of the recent work on polymer matrix nanocomposites is presented. This review is not intended to be comprehensive, but provides an overview of the processing techniques and trends in the mechanical behavior and morphology of nanocomposites. A number of composite systems with amorphous and/or crystalline polymer matrices and different nano-sized filler materials are discussed.

1,096 citations


"Dynamic mechanical analysis and bro..." refers background in this paper

  • ...properties and other advantageous surface properties.([40,41]) TiO2 is one of the most significant semiconducting materials with large bandgap energy...

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Journal ArticleDOI
TL;DR: In this paper, the influence of addition nano-sized TiO2 particles on the morphologies and properties of polysulfone (PSF)/TiO2 organic-inorganic composite UF membranes were investigated through the methods of SEM, XRD, DSC, contact angle goniometer, viscosity measurements, UF experiments and mechanical strength tests.

617 citations


"Dynamic mechanical analysis and bro..." refers background in this paper

  • ...Also, TiO2 NPs exhibit enhanced transport properties due to the control of ion pairs which can be useful for energy storage applications.([42,46,47]) These interesting characteristics of TiO2 NPs have made it an ideal candidate as nanofiller for a variety of polymer matrices....

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Journal ArticleDOI
22 Aug 2014-Polymers
TL;DR: In this article, a review article intended to present information about diverse classes of natural fibers, nanofiller, cellulosic fiber based composite, nanocomposite, and natural fiber/nanofiller-based hybrid composite with specific concern to their applications.
Abstract: The increasing demand for greener and biodegradable materials leading to the satisfaction of society requires a compelling towards the advancement of nano-materials science. The polymeric matrix materials with suitable and proper filler, better filler/matrix interaction together with advanced and new methods or approaches are able to develop polymeric composites which shows great prospective applications in constructions and buildings, automotive, aerospace and packaging industries. The biodegradability of the natural fibers is considered as the most important and interesting aspects of their utilization in polymeric materials. Nanocomposite shows considerable applications in different fields because of larger surface area, and greater aspect ratio, with fascinating properties. Being environmentally friendly, applications of nanocomposites offer new technology and business opportunities for several sectors, such as aerospace, automotive, electronics, and biotechnology industries. Hybrid bio-based composites that exploit the synergy between natural fibers in a nano-reinforced bio-based polymer can lead to improved properties along with maintaining environmental appeal. This review article intended to present information about diverse classes of natural fibers, nanofiller, cellulosic fiber based composite, nanocomposite, and natural fiber/nanofiller-based hybrid composite with specific concern to their applications. It will also provide summary of the emerging new aspects of nanotechnology for development of hybrid composites for the sustainable and greener environment.

520 citations


Additional excerpts

  • ...ing self-cleaning([43]), water treatment([44]), and air purification....

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Journal ArticleDOI
TL;DR: In this paper, the EMI shielding effectiveness of flexible polymer composites comprising of metals and various forms of carbon nanofillers such as carbon black, carbon nano-frillers, carbon nanotubes, graphite, graphene, graphene oxide, graphene nanosheets and graphene nanoribbons has been deeply reviewed.
Abstract: The rapid proliferation and elevated usage of electronic devices have led to a meteoritic rise in electronic pollutions such as electronic noise, electromagnetic interference (EMI) and radiofrequency interference (RFI) which leads to improper functioning of electronic devices. Metals and their alloys can serve as the best EMI shielding materials but their heavy weight, high cost and low corrosion resistance have limited their applications in EMI shielding. The emergence of flexible polymer composites have substituted the metal and metal alloy based EMI shielding materials due to their unique features such as light weight, excellent corrosion resistance, superior electrical, dielectric, thermal, mechanical and magnetic properties that are highly useful for suppressing the electromagnetic noises. In this review article, the EMI shielding effectiveness of flexible polymer composites comprising of metals and various forms of carbon nanofillers such as carbon black, carbon nanofibers, carbon nanotubes, graphite, graphene, graphene oxide, graphene nanosheets, graphene nanoribbons and graphene nanoplatelets have been deeply reviewed.

466 citations


"Dynamic mechanical analysis and bro..." refers background in this paper

  • ...owing to their high shielding capability which resulted from their good electrical conductivity.([1,7]) However, metals are expensive and difficult to process because...

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  • ...EM waves for a long period can cause health hazards to human life.([1]) The emission of the high-frequency EM radiation can be reduced with the help of efficient...

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  • ...The SE value of a material is generally expressed in decibels (dB).([1,5,64]) The requirement of shielding...

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Journal ArticleDOI
TL;DR: In this article, two types of TiO 2 immobilized ultrafiltration membranes (TiO 2 entrapped and deposited membranes) were prepared and applied to activated sludge filtration in order to evaluate their fouling mitigation effect.

449 citations


"Dynamic mechanical analysis and bro..." refers background in this paper

  • ...These interesting characteristics of TiO2 NPs have made it an ideal candidate as nanofiller for a variety of polymer matrices.([19,20,42,48,49]) Thus, the primary aim...

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