Polymer-clay Nanocomposites, Preparations and Current Applications: A Review

Ali, Farman; Ullah, Hayat; Ali, Zarshad; Rahim, Fazal; Khan, Fahad; Rehman, Zia Ur

doi:10.2174/2405461501666160625080118

Cited by 30 publications

(16 citation statements)

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“…After the demonstration by Vaia and Giannelis [ 1 ] that direct polymer melt diffusion into the galleries of organically-modified layered silicates can be achieved, melt mixing of organoclay and polymer (usually by twin-screw extrusion) was adopted as the most popular route for the mass production of clay-based polymer nanocomposites (CPNC) [ 2 , 3 , 4 , 5 , 6 ]. These materials have found increasing practical applications in barrier packaging (films and bottles), in flame-retardant electrical cables, as anticorrosive coatings on metals, in rubber automotive compounds, among many others [ 7 ]. Nevertheless, despite the significant body of work on the manufacture of these materials by melt mixing techniques, the delivery of a fully exfoliated CPNC, i.e., a material made of individual nano-sized clay platelets homogeneously dispersed into the polymer matrix, is rarely achieved.…”

Section: Introductionmentioning

confidence: 99%

In-Line Rheo-Optical Investigation of the Dispersion of Organoclay in a Polymer Matrix during Twin-Screw Compounding

2021

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The dispersion mechanisms in a clay-based polymer nanocomposite (CPNC) during twin-screw extrusion are studied by in-situ rheo-optical techniques, which relate the CPNC morphology with its viscosity. This methodology avoids the problems associated with post extrusion structural rearrangement. The polydimethylsiloxane (PDMS) matrix, which can be processed at ambient and low temperatures, is used to bypass any issues associated with thermal degradation. Local heating in the first part of the extruder allows testing of the usefulness of low matrix viscosity to enhance polymer intercalation before applying larger stresses for clay dispersion. The comparison of clay particle sizes measured in line with models for the kinetics of particle dispersion indicates that larger screw speeds promote the break-up of clay particles, whereas smaller screw speeds favor the erosion of the clay tactoids. Thus, different levels of clay dispersion are generated, which do not simply relate to a progressively better PDMS intercalation and higher clay exfoliation as screw speed is increased. Reducing the PDMS viscosity in the first mixing zone of the screw facilitates dispersion at lower screw speeds, but a complex interplay between stresses and residence times at larger screw speeds is observed. More importantly, the results underline that the use of larger stresses is inefficient per se in dispersing clay if sufficient time is not given for PDMS to intercalate the clay galleries and thus facilitate tactoid disruption or erosion.

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Section: Introductionmentioning

confidence: 99%

In-Line Rheo-Optical Investigation of the Dispersion of Organoclay in a Polymer Matrix during Twin-Screw Compounding

2021

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“…1,2 As these organic-inorganic hybrid materials with different structural morphology generally increase their novel properties compared to traditional composite materials. 3,4 The benefits of using inorganic nanoparticles are good thermal and mechanical stability, and hardness. Polymer matrix (organic part) has shown better elasticity, ductility, flexibility, and processability by uniting these inorganicorganic character hybrid materials.…”

Section: Introductionmentioning

confidence: 99%

“…Organic–inorganic polymer materials attract increasing attention in recent years due to their attractive photoelectric, mechanical, and thermal properties 1,2 . As these organic–inorganic hybrid materials with different structural morphology generally increase their novel properties compared to traditional composite materials 3,4 . The benefits of using inorganic nanoparticles are good thermal and mechanical stability, and hardness.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and physicochemical investigation of imide‐functionalized silica nanocomposites

Ali¹,

Ali

Saeed

et al. 2021

J of Applied Polymer Sci

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The incorporation of inorganic nanoparticles into polymers have gained significant attention to improving functional properties. The ultimate nanocomposite behaviors are influenced by many parameters, such as microstructural distribution that are produced during the treatment process. Herein, a hybrid material integrating a modified network into a polyimide PI matrix was produced via the sol-gel method by the reaction of pyromellitic dianhydride, 4, 4-oxydianaline,

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“…Hybrid organic-inorganic nanocomposites based on polymers and clay plates make it possible to prepare modern advanced materials with new applied properties in pharmaceuticals [28] for obtaining nanocapsules with controlled release of drugs, biosensors, [29], as well as for the preparation of fuel cells for fire-resistant materials [30].…”

Section: Introductionmentioning

confidence: 99%

Preparation the antibacterial coatings based on natural mineral materials

Toksanbay

Kubasheva

Rakhmatullaeva

et al. 2021

ijbch

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The purpose of the study is to obtain nanofilms based on clay minerals and to study the antibacterial activity of the obtained nanocomposite coatings. Diatomite and kaolin were pretreated with sulfuric acid. Silicon plates were used as model substrates. For the first time, multilayers of the composition diatomite/PAA and kaolin/PAA were obtained by multilayer assembly. In the multi-layer, the antiseptic chlorhexidine was introduced, which plays the role of an antibacterial agent. Scanning electron microscopy (SEM) determined the distribution and thickness of the obtained multi-layer, the elemental composition of nanofilms was determined by the SEM-EDX method. The specific surface of natural and sulfuric acidmodified diatomite and kaolin was examined by the BET method. The wetting angle was determined by the lying drop method. Obtaining coatings on the surface of implantable systems is one of the promising areas in modern medicine. In this regard, the production of nanocovers with antibacterial properties is an urgent issue in the fight against infectious diseases associated with bacterial growth. One of the modern methods for producing nanofilms currently used is the Layer by Layer (LBL) method. Nanofilms obtained by this method have found application in tissue engineering and dressings. The feature of this study is the use of clay minerals such as diatomite of the Mugodzharsky deposit and kaolin of the Alekseevsky deposit, which are concentrated in the west and north of Kazakhstan. The obtained multilayers were used as carriers for chlorhexidine and their antibacterial activity was studied. Nanofilms of diatomite/PAA/chlorhexidine and kaolin/PAA/chlorhexidine were tested against the Escherichia coli (E.coli) gram-negative bacterium. Thus, the obtained nanocomposite coatings based on kaolin and diatomite can be potential carriers for drugs.

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Polymer-clay Nanocomposites, Preparations and Current Applications: A Review

Cited by 30 publications

References 0 publications

In-Line Rheo-Optical Investigation of the Dispersion of Organoclay in a Polymer Matrix during Twin-Screw Compounding

In-Line Rheo-Optical Investigation of the Dispersion of Organoclay in a Polymer Matrix during Twin-Screw Compounding

Synthesis and physicochemical investigation of imide‐functionalized silica nanocomposites

Preparation the antibacterial coatings based on natural mineral materials

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