Improve the gas barrier property of PET film with montmorillonite by in situ interlayer polymerization

Zeng, Ke; Bai, Yongping

doi:10.1016/j.matlet.2005.05.070

Cited by 136 publications

(80 citation statements)

References 9 publications

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“…In fact, the high aspect ratio of the organoclay platelets also contributes to enhance mechanical performance. As expected, the gas barrier property increases as the organoclay loading increases [4,5,[11][12][13]. In addition, the crystalline structure of the matrix polymer also affects both the gas barrier and mechanical properties [22].…”

Section: Introductionsupporting

confidence: 63%

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Mechanical and Gas Barrier Properties of Nylon 6/Clay Nanocomposite Blown Films

Somwangthanaroj¹,

Tantiviwattanawongsa²,

Tanthapanichakoon³

2012

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Abstract. Nylon 6/clay nanocomposite films were prepared by melt mixing nylon 6 with organoclay using a twin screw extruder attached to a blown film die. The type of surfactant used in the pretreatment of organoclay was expected to affect the degree of clay dispersion, which would in turn affect the degree of crystallinity, crystalline phase and bulk properties of the polymer composite. Two different surfactants used to treat the surface of montmorillonite clay were trimethyl tallow quaternary ammonium chloride (M3T, a singlechain surfactant) and dimethyl bis (hydrogenated-tallow) ammonium chloride (M2(HT)2, a double-chain surfactant). The addition of the resulting organoclay into nylon 6 was found to enhance the formation of γ-phase and increase the degree of crystallinity and crystallization temperature of the nylon 6. In fact nanocomposite films containing the single-chain surfactant showed a higher degree of clay dispersion in nylon 6 matrix, up to 148 % higher stiffness and up to 100% lower oxygen permeability than those films containing the corresponding double-chain surfactant at the same inorganic loadings investigated. As expected, the nanocomposite films exhibited 58% higher stiffness in the machine direction than the transverse direction.

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Section: Introductionsupporting

confidence: 63%

“…The production of polymer/clay nanocomposite is generally accomplished by two methods: in-situ polymerization [12,17,[19][20][21] and melt mixing methods [1, 2, 4-7, 10, 11, 13]. Obviously, the melt mixing method is easier and more cost effective to prepare nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Gas Barrier Properties of Nylon 6/Clay Nanocomposite Blown Films

Somwangthanaroj¹,

Tantiviwattanawongsa²,

Tanthapanichakoon³

2012

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“…The nanoclay mineral used in these nanocomposites is montmorillonite (also known as bentonite), which is a relatively cheap and widely available natural clay derived from volcanic ash/ rocks. Nanoclay has a natural nano-layer structure that limits the permeation of gases, and provides substantial improvements in gas barrier properties of nanocomposites (Ke and Yongping 2005;Akbari et al 2006). Such improvements have led to the development of nanoclay-polymer composites for potential use in a variety of food-packaging applications, such as processed meats, cheese, confectionery, cereals, boil-in-the-bag foods, as well as in extrusion-coating applications for fruit juices and dairy products, or co-extrusion processes for the manufacture of bottles for beer and carbonated drinks (Akbari et al 2006).…”

Section: Nanotechnology Applications For Food Packagingmentioning

confidence: 99%

Applications and implications of nanotechnologies for the food sector

Chaudhry¹,

Scotter²,

Blackburn³

et al. 2008

Food Additives & Contaminants: Part A

1,053

521

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A review of current and projected nanotechnology-derived food ingredients, food additives and food contact materials is presented in relation to potential implications for consumer safety and regulatory controls. Nanotechnology applications are expected to bring a range of benefits to the food sector, including new tastes, textures and sensations, less use of fat, enhanced absorption of nutrients, improved packaging, traceability and security of food products. The review has shown that nanotechnology-derived food and health food products are set to grow worldwide and, moreover, a variety of food ingredients, additives, carriers for nutrients/supplements and food contact materials is already available in some countries. The current level of applications in the European food sector is at an elementary stage; however, it is widely expected that more and more products will be available in the EU over the coming years. The toxicological nature of hazard, likelihood of exposure and risk to consumers from nanotechnology-derived food/food packaging are largely unknown and this review highlights major gaps in knowledge that require further research. A number of uncertainties and gaps in relevant regulatory frameworks have also been identified and ways of addressing them proposed.

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“…Radial scans of intensity versus scattering angle (2) were recorded at room temperature in the range 2-288 (step size ¼ 0.038, scanning rate ¼ 8s/step) with identical settings of the instrument by using filtered Cu Ka radiation ( ¼ 1.54 Å), an operating voltage of 40 kV, and a filament current of 30 mA. To calculate the clay basal spacing, Bragg's law ( ¼ 2dsin) was applied.…”

Section: X-ray Experimentsmentioning

confidence: 99%

Novel PET Nanocomposites of Interest in Food Packaging Applications and Comparative Barrier Performance With Biopolyester Nanocomposites

Sánchez-García

Giménez

Lagarón

2007

Journal of Plastic Film & Sheeting

127

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Poly(ethylene terephthalate) (PET) is one of the polymers most widely used in the packaging industry. However, it is highly desirable to enhance its barrier properties for applications, such as carbonated drinks and other rigid and flexible packaging applications. The nanocomposites route offers unique possibilities to enhance the properties of this material, provided that adequate thermally resistant and legislation complying nanoadditives are used. This study presents novel PET nanocomposites with enhanced barrier properties to oxygen, water, and limonene based on a new specifically developed food-contact-complying highly swollen montmorillonite grade, and, furthermore, presents and discusses morphological data. Moreover, given the current interest in the packaging industry to replace this material by other biopolyesters, a comparative barrier performance of PET nanocomposites versus that of biopolymers, such as poly(lactic acid) (PLA), polyhydroxyalkanoates (PHB, PHBV), and polycaprolactones (PCL) and their corresponding nanocomposites is also reported.

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Improve the gas barrier property of PET film with montmorillonite by in situ interlayer polymerization

Cited by 136 publications

References 9 publications

Mechanical and Gas Barrier Properties of Nylon 6/Clay Nanocomposite Blown Films

Mechanical and Gas Barrier Properties of Nylon 6/Clay Nanocomposite Blown Films

Applications and implications of nanotechnologies for the food sector

Novel PET Nanocomposites of Interest in Food Packaging Applications and Comparative Barrier Performance With Biopolyester Nanocomposites

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