Elastomeric Polymer Multilayer Thin Film with Sustainable Gas Barrier at High Strain

Xiang, Fangming; Givens, Tara M.; Ward, Sarah M.; Grunlan, Jaime C.

doi:10.1021/acsami.5b04500

Cited by 31 publications

(30 citation statements)

References 32 publications

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“…Prevailing technologies, such as SiO x and Al x O y thin films, provide a relatively impermeable layer to oxygen, but tend to have poor adhesion, flexibility, and require costly vacuum‐based processing . Multilayer films deposited from water using layer‐by‐layer (LbL) assembly have shown extraordinarily low oxygen permeability and are of high interest due to their robustness, tailorability, and ease of fabrication . Despite all the advantages associated with LbL assembly, the large number of processing steps remains a considerable challenge for commercial use .…”

Section: Introductionmentioning

confidence: 99%

“…[5][6][7][8][9] Despite all the advantages associated with LbL assembly, the large number of processing steps remains a considerable challenge for commercial use. [10,11] In order to apply films composed of oppositely charged polyelectrolytes to substrates using just one or two deposition steps, solutions containing polyelectrolyte complexes (PECs) can be employed.…”

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confidence: 99%

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Polyelectrolyte Coacervates Deposited as High Gas Barrier Thin Films

Haile

Sarwar

Henderson

et al. 2016

Macromol. Rapid Commun.

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Multilayer films deposited from water using layer-by-layer (LbL) assembly have shown extraordinarily low oxygen permeability and are of high interest due to their robustness, tailorability, and ease of fabrication. [5][6][7][8][9] Despite all the advantages associated with LbL assembly, the large number of processing steps remains a considerable challenge for commercial use. [10,11] In order to apply films composed of oppositely charged polyelectrolytes to substrates using just one or two deposition steps, solutions containing polyelectrolyte complexes (PECs) can be employed. [12][13][14][15] PECs are formed by the entropy-driven association of oppositely charged polyelectrolytes in water and can exist as stable colloids, flocculants, or metastable coacervates. [16][17][18][19][20] Governed by conditions such as pH and ionic strength, PEC coacervation is marked by a liquid-liquid phase separation, where a polymer rich coacervate phase is in equilibrium with a polymer poor solution phase. PEC coacervates are composed of weakly bound polyelectrolytes, and have viscous liquid-like behavior that can be exploited to quickly apply them as thin films. [18,[21][22][23][24] In the present study, polyelectrolyte coacervates were applied to substrates using Meyer rod coating (a common type of blade coating), [25] in an effort to quickly fabricate thin oxygen barrier films in a single step. The Meyer rod is drawn across a substrate, doctoring off coating fluid, Multilayer coatings consisting of oppositely charged polyelectrolytes have proven to be extraordinarily effective oxygen barriers but require many processing steps to fabricate. In an effort to prepare high oxygen barrier thin films more quickly, a polyelectrolyte complex coacervate composed of polyethylenimine and polyacrylic acid is prepared. The coacervate fluid is applied as a thin film using a rod coating process. With humidity and thermal posttreatment, a 2 µm thin film reduces the oxygen transmission rate of 0.127 mm poly(ethylene terephthalate) by two orders of magnitude, rivalling conventional oxygen barrier technologies. These films are fabricated in ambient conditions using low-cost, water-based solutions, providing a tremendous opportunity for single-step deposition of polymeric high barrier thin films.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Polyelectrolyte Coacervates Deposited as High Gas Barrier Thin Films

Haile

Sarwar

Henderson

et al. 2016

Macromol. Rapid Commun.

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“…1,2 It consists of a center glucose molecule with all five hydroxyl moieties esterified with two gallic acid (3,4,5-trihydroxybenzoic acid) molecules. The trihydroxylphenyl groups play an important role in binding a variety of substrates through chemical and physical interactions, [3][4][5][6][7][8][9][10][11][12][13] which are similar to the adhesion mechanism of 3,4-dihydroxyphenylalanine (DOPA)-enriched adhesive proteins of blue mussels. 14 TA can be deposited onto various organic and inorganic substrates because of its inherent affinity towards surfaces.…”

Section: Introductionmentioning

confidence: 99%

Thiol Reactive Maleimido-Containing Tannic Acid for the Bioinspired Surface Anchoring and Post-Functionalization of Antifouling Coatings

Pranantyo

Neoh

et al. 2016

ACS Sustainable Chem. Eng.

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Inspired by tea stains, a new surface anchor, maleimido-containing tannic acid (TAMA), was developed to introduce the maleimido functionality onto the stainless steel (SS) surfaces. The feasibility of maleimido groups to serve as anchoring sites for surface functionalization via Michael addition was explored in a model experiment using thiol-containing 1H,1H,2H,2H-perfluorodecanethiol. The surface conjugation efficiency of TAMA with the thiol-containing compounds via Michael addition was also compared to that of the surface with tannic acid (TA) only. Water-soluble thiolated carboxymethyl chitosan (CMCSSH) was then grafted on the SS surface pre-anchored with TAMA via solution immersion and spin coating.The deposition of CMCSSH was characterized by contact angle measurement, surface zeta potential, and X-ray photoelectron spectroscopy (XPS). The antifouling efficacy of the CMCSSH coatings was evaluated by protein adsorption and bacterial adhesion. The cytotoxic effect of the CMCSSH coatings on mammalian cells was evaluated using the standard 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay with 3T3 fibroblasts.

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“…25,26 Hydrogen bonded multilayer films are generally less rigid than ionically bonded films. [27][28][29] The weaker hydrogen bonds lead to a looser film structure with a lighter crosslink density that produces greater strain without damage. However, extensibility generally increases at the expense of gas permeability because the barrier properties of LBL deposited films are dependent on density and density is related to hardness.…”

Section: Introductionmentioning

confidence: 99%