Polymer nanocomposites for high-temperature composite repair

Sheng, Xia

doi:10.2172/964401

Cited by 3 publications

(1 citation statement)

References 14 publications

(27 reference statements)

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“…9 shows the thermograms for the different sizes of NiO nanoparticles. The TGA curves were divided into three regimes: 28,47,48 (a) 25 1C to 100 1C, related to gas desorption; (b) 100 1C to 400 1C, where the higher mass loss is shown due to the desorption of physically adsorbed water molecules; and (c) 400 1C to 800 1C, linked to the dehydroxylation of adjacent -OH groups on the surface and their condensation as water molecules, as shown in Fig. 10.…”

Section: Resultsmentioning

confidence: 99%

The effect of the nanosize on surface properties of NiO nanoparticles for the adsorption of Quinolin-65

Marei

Nassar

Vitale

2016

Phys. Chem. Chem. Phys.

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Using Quinolin-65 (Q-65) as a model-adsorbing compound for polar heavy hydrocarbons, the nanosize effect of NiO nanoparticles on the adsorption of Q-65 was investigated. Different-sized NiO nanoparticles with sizes between 5 and 80 nm were prepared by the controlled thermal dehydroxylation of Ni(OH)2. The properties of the nanoparticles were characterized using XRD, BET, FTIR, HRTEM and TGA. The effects of the nanosize on the textural properties, the shape and the morphology were studied. The adsorption of Q-65 molecules onto different-sized nanoparticles was tested in toluene-based solutions. On a normalized surface area basis, the number of Q-65 molecules adsorbed per nm(2) of the NiO surface was the highest for NiO nanoparticles of size 80 nm, while that for 5 nm sized NiO nanoparticles was the lowest. Excitingly, the adsorption capacity of other NiO sizes varied from loading suggesting different adsorption behavior, which exhibits the significance of textural properties during the adsorption of Q-65. Computational modeling of the interaction between the Q-65 molecule and the NiO nanoparticle surface was carried out to get more understanding of its adsorption behavior. A number of factors contributing to the enhanced adsorption capacity of nanoscale NiO were determined. These include surface reactivity, topology, morphology and textural properties.

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Section: Resultsmentioning

confidence: 99%

The effect of the nanosize on surface properties of NiO nanoparticles for the adsorption of Quinolin-65

Marei

Nassar

Vitale

2016

Phys. Chem. Chem. Phys.

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High Temperature Polymer Nanocomposites

Balasubramanian¹,

Tirumalai²

2013

Structural Nanocomposites

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The chapter on High Temperature Polymer Nanocomposites mainly covers the advancements made in the research on varied composite materials and their novel innovations for high temperature applications. The chapter begins with a prelude on existing polymers of thermoplastic or thermosets and also a combination of the two to exploit the dual advantage of both high temperature thermoplastics and thermosets. The polymer composites are developed and implemented for varied temperature regimes in the range of 120-250°C, 250-350°C specially suited for aerospace applications. Further research work is under progress to explore the material suitable for temperatures above 350°C. The initial section explains on the applicability of polymer composites having matrices such as either liquid crystalline polymer, cyanates, polyimides or bismaleimides which are reinforced with either the carbon, glass or aramid fibres especially continuous fibre which provides improved material and physical properties. The polymer-composites are assessed for performance of the matrices and the composites not only for their strength or stiffness but also for their resistance to cracking, minimum loss of weight, brittleness due to cross-linking and other properties that may degrade the performance of the composites over the long period of high temperature applications. This section mentions on the literature reviews having come up with research in progress on other types of resins for high temperature applications namely the oligomers such as the acetylene terminated polyimides or the norbornene terminated polyimides. The second section is concerned with the polymer-nanocomposites for high temperature applications. In this section, the role of nanofillers in the enhancement of composite properties is discussed. The various forms of nanofillers are the nanoclay, nanofibres, carbon

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Nanocomposites for Aircraft Applications

Prabhakaran

2023

joast

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The steady increase in jet fuel prices in recent years has accelerated the quest for greater economy in airline operations. While improvements in aerodynamic efficiency, engine fuel efficiency, etc., have been sought, lighter and stronger materials for aircraft structural components remain a very important goal. The percentage of advanced composites, utilizing carbon fibers, in modern aircraft has reached 50 percent. The trend now is to use nano reinforcements such as graphene and carbon nanotubes to further reduce the structural weight. Due to the difficulties in fabricating nanocomposites with a high enough volume fraction of nano reinforcement, the nano reinforcements are either added to the polymer matrix or grown on the carbon fibers. The nano reinforcements are multi-functional; thus, in addition to contributing strength, they contribute to other properties such as electrical conductivity which in turn enhances the lightning strike protection, electrostatic discharge, electromagnetic shielding, etc. This paper summarizes these aspects and also describes the applications of nanocomposites in aircraft interiors, brake components, aircraft repair, etc.

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Polymer nanocomposites for high-temperature composite repair

Cited by 3 publications

References 14 publications

The effect of the nanosize on surface properties of NiO nanoparticles for the adsorption of Quinolin-65

The effect of the nanosize on surface properties of NiO nanoparticles for the adsorption of Quinolin-65

High Temperature Polymer Nanocomposites

Nanocomposites for Aircraft Applications

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