Polymer/layered silicate nanocomposites: a review from preparation to processing

Ray, Suprakas Sinha; Okamoto, Masami

doi:10.1016/j.progpolymsci.2003.08.002

Cited by 6,101 publications

(1,816 citation statements)

References 398 publications

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“…Nanocomposite technology is one of the approaches to achieve the above requirement. Polymer nanocomposites consist of resins (either thermoset or thermoplastics) and nano fillers enhances the barrier performance to ultraviolet rays, strength, stiffness, dimensional stability, optical properties and heat resistance (Sinha Ray and Okamoto 2003).…”

Section: Introductionmentioning

confidence: 99%

Storage stability of banana chips in polypropylene based nanocomposite packaging films

et al. 2012

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In this study, polypropylene (PP) based nanocomposite films of 15 different compositions of nanoclay, compatibilizer and thickness were developed and used for packaging and storage of banana chips. The effect of nanocomposite films on the quality characteristics viz. moisture content (MC), water activity (WA), total color difference (TCD), breaking force (BF), free fatty acid (FFA), peroxide value(PV), total plate count (TPC) and overall acceptability score of banana chips under ambient condition at every 15 days interval were studied for 120 days. All quality parameters of stored banana chips increased whereas overall acceptability scores decreased during storage. The elevation in FFA, BF and TCD of stored banana chips increased with elapse of storage period as well as with increased proportion of both nanoclay and compatibilizer but decreased by reducing the thickness of film. Among all the packaging materials, the WA of banana chips remained lower than 0.60 i.e. critical limit for microbial growth up to 90 days of storage. The PV of banana chips packaged also remained within the safe limit of 25 meq oxygen kg −1 throughout the storage period. Among all the nanocomposite films, packaging material having 5 % compatibilizer, 2 % nanoclay & 100 μm thickness (treatment E) and 10 % compatibilizer, 4 % nanoclay & 120 μm thickness (treatment N) showed better stability of measured quality characteristics of banana chips than any other treatment.

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Section: Introductionmentioning

confidence: 99%

Storage stability of banana chips in polypropylene based nanocomposite packaging films

et al. 2012

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“…High density polyethylene Eltex ® A4009 (density 0.96 g/cm 3 ; melt flow index 0.85 dg/min at 190°C, 2.16 kg) was supplied by BP Solvay (Brussels, Belgium) in the form of fine powder. Synthetic hydrotalcite organically modified with fatty acid, Perkalite F100 from Akzo-Nobel (CAS number 39366-43-3 and 67701-03-5; density 1.35-1.40 g/cm 3 ) was provided from Clariant Masterbatches S.p.A. (Pogliano Milanese, MI, Italy) in the form of HDPE pellets containing 12% by weight of LDH and 12% by weight of maleated polyethylene (HDPE-g-MA) as compatibilizer.…”

Section: Experimental 21 Materialsmentioning

confidence: 99%

“…Synthetic hydrotalcite organically modified with fatty acid, Perkalite F100 from Akzo-Nobel (CAS number 39366-43-3 and 67701-03-5; density 1.35-1.40 g/cm 3 ) was provided from Clariant Masterbatches S.p.A. (Pogliano Milanese, MI, Italy) in the form of HDPE pellets containing 12% by weight of LDH and 12% by weight of maleated polyethylene (HDPE-g-MA) as compatibilizer. Before processing, masterbatch was dried in a vacuum oven for 24 h at 90°C.…”

Section: Experimental 21 Materialsmentioning

confidence: 99%

“…In recent years several research efforts have been focused on the preparation of polymer/layered inorganic nanocomposites [1][2][3] because of the excellent properties in comparison to the neat polymer. The main reason of this interest lies certainly in the properties of the nanoclay, like high stiffness, and high aspect ratio, that may induce enhancement of various polymer properties (thermal stability, mechanical properties, flame resistance and gas barrier) even with small amount of filler [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…The main reason of this interest lies certainly in the properties of the nanoclay, like high stiffness, and high aspect ratio, that may induce enhancement of various polymer properties (thermal stability, mechanical properties, flame resistance and gas barrier) even with small amount of filler [3,4]. The nano composite materials can exhibit properties over those expected from continuum mechanics predictions, not achieved with larger scale reinforcement [5].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Organically modified hydrotalcite for compounding and spinning of polyethylene nanocomposites

Dabrowska¹,

Fambri²,

Pegoretti³

et al. 2013

Express Polym. Lett.

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Abstract.Organically modified hydrotalcite is a recent class of organoclay based on layered double hydroxides (LDH), which is anionically modified with environmental friendly ligands such as fatty acids. In this paper the influence of hydrotalcite compounded/dispersed by means of two different processes for production of plates and fibers of polyolefin nanocomposites will be compared. A polyethylene matrix, suitable for fiber production, was firstly compounded with various amounts of hydrotalcite in the range of 0.5-5% by weight, and then compression moulded in plates whose thermomechanical properties were evaluated. Similar compositions were processed by using a co-rotating twin screw extruder in order to directly produce melt-spun fibers. The incorporation of clay into both bulk and fiber nanocomposites enhanced the thermal stability and induced heterogeneous nucleation of polyethylene crystals. Hydrotalcite manifested a satisfactory dispersion into the polymer matrix, and hence positively affected the mechanical properties in term of an increase of both Young's modulus and tensile strength. Tenacity of nanocomposite as spun fibers was increased up to 30% with respect to the neat polymer. Moreover, the addition of LDH filler induced an increase of the tensile modulus of drawn fibers from 5.0 GPa (neat HDPE) up to 5.6-5.8 GPa.

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Flame Retardants: Overview

Morgan

Worku

2015

Kirk-Othmer Encyclopedia of Chemical Technology

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Flame retardants are a class of chemicals utilized to provide fire safety performance to other materials, structures, and devices used in modern society. These chemicals are highly varied in molecular structure and chemistry and work by one of the following three main mechanisms: vapor‐phase combustion inhibition, endothermic cooling, or condensed‐phase char formation. The chemicals in use today fall into seven main chemical groups including halogenated, phosphorus based, mineral fillers, nitrogen based, intumescent materials, inorganic materials, and polymer nanocomposites. In this article, how flame retardants are used, how they work, and when to use them is discussed. From the article, it will be clear that flame retardants are chemicals employed to provide fire protection for specific materials in specific fire risk scenarios. Specifically, while the term “flame retardant” can cover a wide range of materials and chemicals, not all materials called flame retardants are effective in all materials and against all fire threats. Each flame retardant chemical must be tailored for its end use, and in this article, the criteria for flame retardant selection and use will be discussed in a general manner. This article serves as an overview of flame‐retardant technology from how they are used today, what chemistries are used, and what the future of this technology may be. The article is comprehensive in scope about what this chemical technology is, but cannot provide all of the essential details for proper use of these materials in end‐use fire safety applications. Still, guidance is provided in the article to help the reader to understand the breadth of the technology and where to go to learn more, or how to engage intelligently with fire safety engineers and fire safety scientists to develop fire‐safe materials.

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Polymer/layered silicate nanocomposites: a review from preparation to processing

Cited by 6,101 publications

References 398 publications

Storage stability of banana chips in polypropylene based nanocomposite packaging films

Storage stability of banana chips in polypropylene based nanocomposite packaging films

Organically modified hydrotalcite for compounding and spinning of polyethylene nanocomposites

Flame Retardants: Overview

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