Layer-by-layer assembled multilayers of charged polyurethane and graphene oxide platelets for flexible and stretchable gas barrier films

Soft Matter ◽  
2018 ◽  
Vol 14 (32) ◽  
pp. 6708-6715 ◽  
Author(s):  
Min Ji Noh ◽  
Min Jun Oh ◽  
Jae Ho Choi ◽  
Jae Chul Yu ◽  
Woo-Jae Kim ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Barrier Property ◽  
Layer By Layer ◽  
Gas Barrier ◽  
Barrier Films ◽  
Self Assembled ◽  
Flexible Polyurethane

To improve stretchability of gas barrier films without sacrificing the barrier property, alternatively charged and highly flexible polyurethane chains were layer-by-layer self-assembled with graphene oxide nano-platelets.

Improvement Approach for Gas Barrier Behavior of Polymer/Clay Nanocomposite Films

MRS Advances ◽  
2017 ◽  
Vol 2 (57) ◽  
pp. 3547-3552 ◽  
Author(s):  
Maedeh Dabbaghianamiri ◽  
Sayantan Das ◽  
Gary W. Beall
Keyword(s):  
Polymer Nanocomposites ◽  
Food Packaging ◽  
Barrier Properties ◽  
Nanocomposite Films ◽  
Layer By Layer ◽  
Gas Barrier ◽  
Barrier Films ◽  
High Particle ◽  
Polymer Clay Nanocomposite ◽  
Self Assembled

ABSTRACTPolymer nanocomposites (PNC) include a copolymer or polymer which has nanoparticles dispersed in the polymer matrix at the nano-level. One of the most common types of polymer nanocomposites contain smectic clays as the nanoparticles. These clay minerals increase the mechanical properties of standard polymers and improve barrier properties. For optimum barrier properties, Layer-by-Layer assembly (LbL) is one of the most effective methods for depositing thin films. LbL methods however, are quite tedious and produce large quantities of waste. A newly discovered phenomenon of self-assembled polymer nanocomposites utilizes entropic forces to drive the assembly to spontaneously form a larger nanostructured film. This approach allows polymers and nanoparticles with high particle loadings to be mixed, and create the super gas barrier films. We have developed a coating technique which can be employed to make self-assembled gas barrier films via inkjet printing. This technique is industrially scalable and efficient. This is because it does not need any rinsing step and drying steps as required in LbL. The influence of different polymers Polyvinylpyrrolidone (PVP) and Poly (acrylic acid) PAA with Montmorillonite (MMT) nanoclay solutions on Polyethylene terephthalate (PET) substrate is examined to study their effectiveness as a gas barrier film. The results showing the excellent oxygen barrier behavior of a combination of PVP and MMT Nano clay nanocomposite with high transparency. These high barrier gas nanocomposite films are good candidates for a variety of food packaging applications.

scholarly journals Layer-by-Layer Assembled Nano-Composite Multilayer Gas Barrier Film Manufactured with Stretchable Substrate

2021 ◽  
Vol 11 (13) ◽  
pp. 5794
Author(s):  
Se-Jung Kim ◽  
Tanyoung Kim ◽  
Dongsoo Kim ◽  
Byeong-Kwon Ju
Keyword(s):  
Transmission Rate ◽  
Significant Loss ◽  
Light Transmittance ◽  
Poly Vinyl Alcohol ◽  
Layer By Layer ◽  
Gas Barrier ◽  
Nano Composite ◽  
Barrier Films ◽  
Potential Applications ◽  
Barrier Film

Most gas barrier films produce cracks that lead to a significant loss of gas barrier integrity when strain is applied. In order to fabricate stretchable gas barrier films with low water permeability and high endurance after stretching, we used polydiallydimethylammonium (PDDA) mixed with graphene oxide (GO) and poly (vinyl alcohol) (PVA) mixed with montmorillonite (MMT). These films were manufactured by layer-by-layer assembly on an Ecoflex/polydimethylsiloxane (PDMS) substrate with pre-strain applied. A total of 30 layers of PDDA (GO)/PVA (MMT) coated on the substrate exhibited a low water vapor transmission rate of 2.5 × 10−2 g/m2 day after 100 cycles of stretching (30% strain). In addition, they exhibited a high light transmittance of 86.54%. Thus, the prepared stretchable gas barrier film has potential applications as a barrier film in transparent and stretchable electronic devices.

Enhanced reverse saturable absorption of electrostatic self-assembled layer by layer films containing (8-quinolineoxy-5-sulfonic acid)phthalocyanine cobalt and graphene oxide

RSC Advances ◽  
2015 ◽  
Vol 5 (68) ◽  
pp. 55150-55157 ◽  
Author(s):  
Bowen Chen ◽  
Chunying He ◽  
Weina Song ◽  
Cheng Zhao ◽  
Yachen Gao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Sulfonic Acid ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Layer By Layer ◽  
Input Intensity ◽  
Self Assembled ◽  
Self Assembled Layer

The 25-bilayer CoPc/GO film was fabricated through electrostatic self-assembled layer by layer (LBL) technique, and it exhibits strong reverse saturable absorption (RSA) effect with the input intensity of 1.16 μJ.

Tuning nanostructure of graphene oxide/polyelectrolyte LbL assemblies by controlling pH of GO suspension to fabricate transparent and super gas barrier films

Nanoscale ◽  
2013 ◽  
Vol 5 (19) ◽  
pp. 9081 ◽  
Author(s):  
Jung-Tsai Chen ◽  
Ywu-Jang Fu ◽  
Quan-Fu An ◽  
Shen-Chuan Lo ◽  
Shu-Hsien Huang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Gas Barrier ◽  
Barrier Films
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