Influence of Clay Concentration on the Gas Barrier of Clay–Polymer Nanobrick Wall Thin Film Assemblies

Priolo, Morgan A.; Holder, Kevin M.; Gamboa, Daniel; Grunlan, Jaime C.

doi:10.1021/la201584r

Cited by 94 publications

(81 citation statements)

References 56 publications

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“…By calculating the O 2 permeability based on the unit film thickness of both the coated film and the coating layer only, one can observe an even more distinctive barrier performance of the nanocoating, considering that the coating thickness is in the 560- to 650-nm range, whereas the substrate film is much thicker (20 μm). Alternatively, the barrier improvement factor (BIF) ( 41 ) (which is defined as P s / P t , where P s is the permeability of the substrate and P t is the permeability of the coated substrate) can be used to assess the overall barrier performance of the coating. As shown in Table 2, the BIF of the coated PLA films reached 13,765 when the nanocoating contained 70 wt % of MMT.…”

Section: Resultsmentioning

confidence: 99%

Biomimetic nanocoatings with exceptional mechanical, barrier, and flame-retardant properties from large-scale one-step coassembly

et al. 2017

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Section: Resultsmentioning

confidence: 99%

Biomimetic nanocoatings with exceptional mechanical, barrier, and flame-retardant properties from large-scale one-step coassembly

et al. 2017

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“…Both systems exhibit linear growth, which is typical for bilayers containing nanoparticles. 10,20,22 The relationship between the number of bilayers and RI was not linear and evolves differently in each case. The RI in PEI/VMT shows greater consistency after 10 bilayers, where it ranges from 1.65-1.66.…”

Section: Resultsmentioning

confidence: 99%

Bio-inspired iridescent layer-by-layer assembled cellulose nanocrystal Bragg stacks

et al. 2015

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Layer-by-layer (LbL) assembly was used to fabricate a synthetic analogue of the color producing multilayered structure commonly found in many biological systems, particularly Coleoptera. The resulting iridescent films comprise multiple LbL-deposited layers designed to control color appearance through the materials' refractive indices and individual multilayer layer thicknesses. The fabricated systems, referred to as Bragg stacks, exhibited very similar optical behavior to the model and to an iridescent beetle specimen, selectively reflecting the desired color in a narrow band of visible wavelengths and displaying iridescent behavior.

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“…6). Combined with the aligned platelets and tightly packed structure, as revealed by SEM and AFM, these films were expected to provide good gas barrier performance4142.…”

Section: Resultsmentioning

confidence: 99%

Facile synthesis of high strength hot-water wood extract films with oxygen-barrier performance

Chen

Wang

et al. 2017

Sci Rep

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Biobased nanocomposite films for food packaging with high mechanical strength and good oxygenbarrier performance were developed using a hot-water wood extract (HWE). In this work, a facile approach to produce HWE/montmorillonite (MMT) based nanocomposite films with excellent physical properties is described. The focus of this study was to determine the effects of the MMT content on the structure and mechanical properties of nanocomposites and the effects of carboxymethyl cellulose (CMC) on the physical properties of the HWE-MMT films. The experimental results suggested that the intercalation of HWE and CMC in montmorillonite could produce compact, robust films with a nacre-like structure and multifunctional characteristics. This results of this study showed that the mechanical properties of the film designated F CMC0.05 (91.5 MPa) were dramatically enhanced because the proportion of HWE, MMT and CMC was 1:1.5:0.05. In addition, the optimized films exhibited an oxygen permeability below 2.0 cm 3 μm/day·m 2 ·kPa, as well as good thermal stability due to the small amount of CMC. These results provide a comprehensive understanding for further development of highperformance nanocomposites which are based on natural polymers (HWE) and assembled layered clays (MMT). These films offer great potential in the field of sustainable packaging.Natureal load-bearing materials, such as seashell nacre, are well known for their extraordinary mechanical properties that result from their highly ordered brick-mortar architecture. Nacre has inspired the fabrication of synthetic layered nanocomposite materials 1-3 . The introduction of clay into a polymer matrix can considerably enhance the thermal and mechanical properties of the polymer film and reduce oxygen permeability 4,5 . Therefore, a potential route for improving the oxygen barrier and mechanical properties of polymer films is the addition of layered clays such as montmorillonite (MMT) to form polymer/clay nanocomposites. In recent years, special attention has been given to the synthesis and characterization of nanocomposites that are based on natural polymers and assembling layered clays 6 . Increased attention is being paid to renewable resources, hence the feature of hemicelluloses including their abundance, biodegradability and biocompatibility have made them attractive 7,8 . However, using hemicelluloses to produce materials on an industrial scale is hampered by the high production costs associated with obtaining these materials with a high degree of purity 9 . It is well known that a major fraction of wood is present in the form of hemicelluloses and lignin which are present in the waste pulping liquor and must be removed during pulping to yield undegraded cellulose fibers 10 . Thus, extracting the valuable noncellulosic components from wood chips prior to pulping and converting them into biofuels or the value-added materials is financially beneficial to the pulping industry. The purpose of the proposed hot-water extraction (autohydrolysis processing, which could lead t...

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Influence of Clay Concentration on the Gas Barrier of Clay–Polymer Nanobrick Wall Thin Film Assemblies

Cited by 94 publications

References 56 publications

Biomimetic nanocoatings with exceptional mechanical, barrier, and flame-retardant properties from large-scale one-step coassembly

Biomimetic nanocoatings with exceptional mechanical, barrier, and flame-retardant properties from large-scale one-step coassembly

Bio-inspired iridescent layer-by-layer assembled cellulose nanocrystal Bragg stacks

Facile synthesis of high strength hot-water wood extract films with oxygen-barrier performance

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