Macromol. Rapid Commun. 10/2014

Holder, Kevin M.; Spears, Benjamin R.; Huff, Molly E.; Priolo, Morgan A.; Harth, Eva; Grunlan, Jaime C.

doi:10.1002/marc.201470032

Cited by 8 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result implies that these cracks are relatively superficial (i.e., they do not extend through the entire film's thickness). 35 …”

Section: Macromoleculesmentioning

confidence: 97%

“…More recently, a stretchable gas barrier was produced by introducing hydrogen-bonding layers between electrostatically bonded clay−polymer layers. 35 This LbL assembly withstood 10% strain without cracking, but the OTR was only 4 times lower than the neat PET substrate. Fully hydrogen-bonded assemblies of poly(ethylene oxide) (PEO) and poly(acrylic acid) (PAA) were able to withstand 100% strain and reduce the oxygen permeability of rubber by a factor of more than 5.…”

Section: ■ Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Combined Ionic and Hydrogen Bonding in Polymer Multilayer Thin Film for High Gas Barrier and Stretchiness

et al. 2015

Self Cite

View full text Add to dashboard Cite

A unique polymer multilayer thin film with high gas barrier at high strain (>10%) was achieved with a combination of ionic and hydrogen bonding. Layer-by-layer assembly was used to deposit quadlayers (QL) of polyethylenimine (PEI), poly(acrylic acid) (PAA), poly(ethylene oxide) (PEO), and PAA. Altering the deposition pH of the various layers resulted in different physical and mechanical properties. PEI/PAA/PEO/PAA quadlayers assembled at pH 10/4/2.5/2.5 grow much thicker than the same film with all components deposited at pH 3, which is due to a porosity transition during assembly and in-and-out diffusion of the partially charged polyelectrolytes with high chain mobility (PEI at pH 10 and PAA at pH 4). The change in pH during the film assembly induces a porous structure in the 10/4/2.5/2.5 film that results in poor gas barrier. Films deposited on 1 mm thick polyurethane rubber at pH 3 have a densely packed structure with no pores. A 20 QL film (∼1 μm thick) achieves an oxygen transmission rate 15 times lower than uncoated rubber due to the synergistic effect of the interdigitated layers of ionic and hydrogen bonding. When stretched 10%, the barrier improves by a factor of 28 relative to uncoated polyurethane. This combination of stretchability and high gas barrier is unprecedented and offers the opportunity to produce relatively high barrier elastomers.

show abstract

“…This result implies that these cracks are relatively superficial (i.e., they do not extend through the entire film's thickness). 35 …”

Section: Macromoleculesmentioning

confidence: 97%

Section: ■ Introductionmentioning

confidence: 98%

Combined Ionic and Hydrogen Bonding in Polymer Multilayer Thin Film for High Gas Barrier and Stretchiness

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…Then LDPE/O-MMT nanocomposites was prepared by twinscrew extruder and hot-press. 25,26,58,59,[64][65][66]76,101,104,[147][148][149][150]171,172 By alternating exposure of a substrate to components with complementary interactions (Fig. 132 PET is one of the most widely used polymers in the packaging industry.…”

Section: Gas Barrier Properties Of Polymer/ Clay Nanocompositesmentioning

confidence: 99%

“…129 Mittal et al investigated the effect of thermally stable imidazolium treated MMT on the gas permeation behavior of PP nanocomposites. 149 Möller et al prepared lithium uoro-hectorite (Li-Hec) with kilo-aspect ratio coated on PP foil substrate and observed a more than two orders of magnitude reduction of the relative permeability compared with the original substrate. The oxygen permeation decreased from 89 cm 3 mm per m 2 per day mmHg for the pure PP lms to 48 cm 3 mm per m 2 per day mmHg for the composite lms containing 4 vol% ller fraction.…”

Section: Gas Barrier Properties Of Polymer/ Clay Nanocompositesmentioning

confidence: 99%

Gas barrier properties of polymer/clay nanocomposites

et al. 2015

View full text Add to dashboard Cite

In the field of nanotechnology, polymer nanocomposites (PNCs) have attracted both academic and industrial interest due to their exceptional electrical, mechanical and permeability properties. In this review, we summarize the state-of-the-art progress on the use of platelet-shaped fillers for the gas barrier properties of PNCs. Layered silicate nanoclays (such as montmorillonite and kaolinite) appear to be the most promising nanoscale fillers. These exfoliated nanofillers are able to form individual platelets when dispersed in a polymer matrix. The nanoplatelets do not allow diffusion of small gases through them and are able to produce a tortuous path which works as a barrier structure for gases. The utilization of clays in the fabrication of PNCs with different polymer matrices is explored. Most synthesis methods of clay-based PNCs are covered, including, solution blending, melt intercalation, in situ polymerization and latex compounding. The structure, preparation and gas barrier properties of PNCs are discussed in general along with detailed examples drawn from the scientific literature. Furthermore, details of mathematical modeling approaches/methods of gas barrier properties of PNCs are also presented and discussed.

show abstract

“…Over the past two decades, the LbL assembly technique has received significant attention due to its precise tailorability of thin‐film structure through adjustment of concentration, pH/ionic strength, temperature, molecular weight, and deposition time of the aqueous deposition mixtures. Clay–polymer composites assembled via LbL have been shown to improve strength, oxygen barrier, drug release, and flame retardant properties, relative to all‐polymer LbL films and traditional thick‐film nanocomposites. The simplicity of the LbL assembly technique, as compared to current films employed for He and H 2 barrier, makes it an attractive alternative.…”

Section: Introductionmentioning

confidence: 99%

Super Hydrogen and Helium Barrier with Polyelectolyte Nanobrick Wall Thin Film

Tzeng

Lugo

Garret

et al. 2014

Macromol. Rapid Commun.

Self Cite

View full text Add to dashboard Cite

In an effort to impart light gas (i.e., H2 and He) barrier to polymer substrates, thin films of polyethylenimine (PEI), poly(acrylic acid) (PAA), and montmorrilonite (MMT) clay are deposited via layer-by-layer (LbL) assembly. A five "quadlayer" (122 nm) coating deposited on 51 μm polystyrene is shown to lower both hydrogen and helium permeability three orders of magnitude against bare polystyrene, demonstrating better performance than thick-laminated ethylene vinyl-alcohol (EVOH) copolymer film and even metallized polyolefin/polyester film. These excellent barrier properties are attributed to a "nanobrick wall" structure. This highly flexible coating represents the first demonstration of an LbL deposited film with low hydrogen and helium permeability and is an ideal candidate for several packaging and protection applications.

show abstract

Macromol. Rapid Commun. 10/2014

Cited by 8 publications

References 0 publications

Combined Ionic and Hydrogen Bonding in Polymer Multilayer Thin Film for High Gas Barrier and Stretchiness

Combined Ionic and Hydrogen Bonding in Polymer Multilayer Thin Film for High Gas Barrier and Stretchiness

Gas barrier properties of polymer/clay nanocomposites

Super Hydrogen and Helium Barrier with Polyelectolyte Nanobrick Wall Thin Film

Contact Info

Product

Resources

About