Recent developments in the synthesis of hybrid polymer/clay nanocomposites

Mallakpour, Shadpour; Rashidimoghadam, Shima

doi:10.1016/b978-0-08-100785-3.00008-5

Cited by 10 publications

(9 citation statements)

References 79 publications

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“…It is already known that the properties of polymers can be improved by the addition of nanofillers [ 22 , 23 , 24 , 25 ]. Some of the most progressively, and for the past few years extensively, studied nanofillers are clay minerals [ 26 , 27 , 28 ]—naturally abundant nontoxic layered silicates that are readily available at low prices, which makes them very attractive as nanofillers, and which can create three main types of composites with polymer chains: intercalated nanocomposites, exfoliated nanocomposites, or microcomposites. Compared to conventional composites, polymer/clay nanocomposites exhibit newly obtained and improved properties such as enhanced mechanical, thermal, barrier, electrical barrier, and optical properties; these structures also easily undergo degradation in the presence of microorganisms, due to the nanometric thickness of clay minerals, which are generally obtained with a lower silicate content below 5 wt%.…”

Section: Introductionmentioning

confidence: 99%

Development of Novel Thin Polycaprolactone (PCL)/Clay Nanocomposite Films with Antimicrobial Activity Promoted by the Study of Mechanical, Thermal, and Surface Properties

et al. 2021

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Infection with pathogenic microorganisms is of great concern in many areas, especially in healthcare, but also in food packaging and storage, or in water purification systems. Antimicrobial polymer nanocomposites have gained great popularity in these areas. Therefore, this study focused on new approaches to develop thin antimicrobial films based on biodegradable polycaprolactone (PCL) with clay mineral natural vermiculite as a carrier for antimicrobial compounds, where the active organic antimicrobial component is antifungal ciclopirox olamine (CPX). For possible synergistic effects, a sample in combination with the inorganic antimicrobial active ingredient zinc oxide was also prepared. The structures of all the prepared samples were studied by X-ray diffraction, FTIR analysis and, predominantly, by SEM. The very different structure properties of the prepared nanofillers had a fundamental influence on the final structural arrangement of thin PCL nanocomposite films as well as on their mechanical, thermal, and surface properties. As sample PCL/ZnOVER_CPX possessed the best results for antimicrobial activity against examined microbial strains, the synergic effect of CPX and ZnO combination on antimicrobial activity was proved, but on the other hand, its mechanical resistance was the lowest.

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Section: Introductionmentioning

confidence: 99%

Development of Novel Thin Polycaprolactone (PCL)/Clay Nanocomposite Films with Antimicrobial Activity Promoted by the Study of Mechanical, Thermal, and Surface Properties

et al. 2021

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“…Investigations on polar and non-polar polymer matrices loaded with a variety of nanoclays comprehended them as multifunctional properties polymer nanocomposites (PNCs) in the field of advanced materials engineering and technologies. [1][2][3][4][5][6][7][8] Most of the studies have concluded that the nanoclay structures (i.e., the amounts of exfoliated or intercalated and the sizes of tactoids) in the host polymer matrices predominantly rule the useful properties of such hybrid nanocomposites. [1][2][3]6,[8][9][10][11][12][13] So with the consideration of this fact, enormous attempts had been made to achieve better homogeneous dispersion of loaded nanoclay platelets in the PEO matrix by adopting different preparation methods.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8] Most of the studies have concluded that the nanoclay structures (i.e., the amounts of exfoliated or intercalated and the sizes of tactoids) in the host polymer matrices predominantly rule the useful properties of such hybrid nanocomposites. [1][2][3]6,[8][9][10][11][12][13] So with the consideration of this fact, enormous attempts had been made to achieve better homogeneous dispersion of loaded nanoclay platelets in the PEO matrix by adopting different preparation methods. 5,6,[9][10][11] Furthermore, numerous researches evidenced that the loading of treated-nanoclay in the polymer matrices formed highly successful nanocomposites of improved thermal and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…5,6,[9][10][11] Furthermore, numerous researches evidenced that the loading of treated-nanoclay in the polymer matrices formed highly successful nanocomposites of improved thermal and mechanical properties. 2,3,7,8,11 It was also concluded that the exfoliated nanoclay structure plays an important role in improving the anticorrosive as well as flammable and permeable properties of the nanocomposites, [1][2][3] whereas, intercalated clay structure appreciably provides favorable path for ion transportation in the solid-state PNC electrolytes. 14,15 Among the researches on nanoclay dispersed polymer matrix-based various PNCs, the semicrystalline PEO matrix is highly attempted because of its linear chain structure, hydrophilic character, low melting temperature, and good flexibility and biodegradability of the film.…”

Section: Introductionmentioning

confidence: 99%

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Thermally improved crystalline phase and intercalated PEO/OMMT nanocomposites for high to ultrahigh radio frequency range low‐permittivity nanodielectrics

Sengwa

Dhatarwal

2021

J of Applied Polymer Sci

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Poly(ethylene oxide) (PEO)/organomodified-montmorillonite (OMMT) nanoclay based nanocomposites having 1, 3, 5, 10, and 20 wt% OMMT nanofiller were prepared by homogeneous mixing and the melt-compounding method. These hybrid materials were characterized by employing X-ray diffractometer, differential scanning calorimeter, and radio frequency impedance analyzer. The experimental results confirmed the formation of OMMT intercalated structures with reduced crystallinity and increased melting temperature of PEO crystallites which are predominantly ruled by the nanofiller amounts in the PEO/OMMT nanocomposites. Dielectric permittivity of these nanocomposites measured at 20 C exhibited a gradual decrease with increasing frequencies of the applied harmonic electric field of high to ultrahigh range (i.e., 1 MHz-1 GHz), but it changed anomalously in the range of 2.6-3.6 with the increase of OMMT amounts in the PEO matrix. The dielectric losses in these composites were found low and their loss spectra exhibited a hydrogen bond dipolar reorientation relaxation process around 1 GHz. The alternating current electrical conductivity of these nanocomposites increased with frequency and also changed with the OMMT concentrations. These PEO/OMMT nanocomposites are classified as low permittivity nanodielectrics which could be potential candidates for advances in flexible and biodegradable radio-electronic devices.

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“…One of the popular research topics is polymer/clay nanocomposites and has been studied extensively in recent years. (1)(2)(3)(4)(5) Research in this field has been started with Toyota R&D department's work on nylon in the early nineties in order to produce materials with enhanced physical and chemical properties. Later, other applications of polymer/clay nanocomposites in different industrial fields are also developed such as food packaging, automobile parts, microelectronic packaging, and medical tubing.…”

Section: Introductionmentioning

confidence: 99%

PVA Nanocomposites Of Organoclays Obtained Using Different Cationic Surfactants

Ünlü

Turutoğlu

Atici

et al. 2018

Journal of the Turkish Chemical Society Section A: Chemistry

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This study is about the preparation of two different organoclays with cationic surfactants and their poly(vinyl alcohol) nanocomposites with increased thermal and mechanical behavior. Organoclays were prepared to modify clay mineral with solution intercalation method using aqueous solutions of cationic surfactants dodecyltrimethylammonium bromide (DTABr) and cetylpyridinium bromide (CPBr). Obtained organoclays (D-MMT and C-MMT for DTABr/MMT and CPBr/MMT, respectively) were characterized using different methods including zeta potential and XRD. Results indicated an absolute decrease in zeta potential about 20 mV for C-MMT and 14 mV for D-MMT indicating flocculation and coating of the surface. Moreover, measurements indicated that interlayer distance increased based on basal spacing peak shift whose value was 1.27 nm for NaMMT, whereas 1.40 nm for D-MMT, and 1.75 nm for C-MMT. The organoclays were used in the preparation of PVA/clay nanocomposites; thermal stability of the nanocomposites was determined using TGA, while mechanical strength measurements were done using DMA. The maximum thermal decomposition temperature of the pristine PVA and nanocomposites were compared, and an average increase of 4°C was observed. Also, the activation energy of the decomposition was observed ca. 40 kJ.mol -1 higher than pristine PVA.

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Recent developments in the synthesis of hybrid polymer/clay nanocomposites

Cited by 10 publications

References 79 publications

Development of Novel Thin Polycaprolactone (PCL)/Clay Nanocomposite Films with Antimicrobial Activity Promoted by the Study of Mechanical, Thermal, and Surface Properties

Development of Novel Thin Polycaprolactone (PCL)/Clay Nanocomposite Films with Antimicrobial Activity Promoted by the Study of Mechanical, Thermal, and Surface Properties

Thermally improved crystalline phase and intercalated PEO/OMMT nanocomposites for high to ultrahigh radio frequency range low‐permittivity nanodielectrics

PVA Nanocomposites Of Organoclays Obtained Using Different Cationic Surfactants

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