Highly Size‐Selective Ionically Crosslinked Multilayer Polymer Films for Light Gas Separation

Kim, Daejin; Tzeng, Ping; Barnett, Kevin J.; Yang, Yuanchao; Wilhite, Benjamin A.; Grunlan, Jaime C.

doi:10.1002/adma.201302177

Cited by 45 publications

(58 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PAH and PSS can form dense ionically‐crosslinked structures that compresses the thin film This densified structure imparts gas barrier. Many all‐polymer LbL films have been studied, using strong and weak polyelectrolytes, bio‐based polymers, and polyimide sheets, which all can form dense, ionically‐crosslinked structures. Yang et al found that PEI and PAA form exponentially growing, dense films with super gas barrier performance (<0.005 cm 3 m ‐2 day ‐1 atm ‐1 ) with just 8 BL .…”

Section: Layer‐by‐layer Assemblymentioning

confidence: 99%

Recent Advances in Gas Barrier Thin Films via Layer-by-Layer Assembly of Polymers and Platelets

Priolo¹,

Holder

Guin

et al. 2015

Macromol. Rapid Commun.

Self Cite

121

100

View full text Add to dashboard Cite

Layer-by-layer (LbL) assembly has emerged as the leading non-vacuum technology for the fabrication of transparent, super gas barrier films. The super gas barrier performance of LbL deposited films has been demonstrated in numerous studies, with a variety of polyelectrolytes, to rival that of metal and metal oxide-based barrier films. This Feature Article is a mini-review of LbL-based multilayer thin films with a 'nanobrick wall' microstructure comprising polymeric mortar and nano-platelet bricks that impart high gas barrier to otherwise permeable polymer substrates. These transparent, water-based thin films exhibit oxygen transmission rates below 5 × 10(-3) cm(3) m(-2) day(-1) atm(-1) and lower permeability than any other barrier material reported. In an effort to put this technology in the proper context, incumbent technologies such as metallized plastics, metal oxides, and flake-filled polymers are briefly reviewed.

show abstract

Section: Layer‐by‐layer Assemblymentioning

confidence: 99%

Recent Advances in Gas Barrier Thin Films via Layer-by-Layer Assembly of Polymers and Platelets

Priolo¹,

Holder

Guin

et al. 2015

Macromol. Rapid Commun.

Self Cite

121

100

View full text Add to dashboard Cite

show abstract

“…The conformal nature of these coatings allows them to uniformly cover complex surfaces with varying size, shape, and porosity . LbL thin films have been produced for drug delivery, gas barrier and separation, antimicrobial behavior, and fire protection of various substrates …”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube Multilayer Nanocoatings Prevent Flame Spread on Flexible Polyurethane Foam

Holder

Cain

Plummer

et al. 2015

Macro Materials & Eng

Self Cite

View full text Add to dashboard Cite

In an effort to protect polyurethane foam (commonly used as cushioning in upholstered furniture) from fire using environmentally benign chemistries, nanocomposite thin films are deposited using water‐based solutions of cationic‐ and anionic‐stabilized multiwalled carbon nanotubes (MWCNTs). The open‐celled foam is coated using layer‐by‐layer (LbL) assembly to produce uniform protective layers up to 600 nm thick, comprised of cationic polyethylenimine modified with pyrene (PEI‐Py), anionic poly(acrylic acid) (PAA), and MWCNT. Film thickness is found to rely heavily on the PAA‐stabilized MWCNT solution. Coatings of only six [PEI‐Py/PAA+MWCNT] bilayers (BL) show tremendous reductions in peak heat release rate (up to 67%) and total smoke release (up to 80%) for the polyurethane foam. This same coating significantly improves the performance of the polyurethane when exposed to horizontal and vertical flame tests. With 9 BL, the foam successfully withstands a vertical burn test, self‐extinguishing immediately after removal of the test flame. These dramatic reductions in foam flammability are unprecedented and are attributed to the protective nature of the carbon‐based char formed from the coating that acts as a protective barrier.

show abstract

“…In comparison, the surface of the 6 BL PEM film deposited without ATH is relatively smooth with the exception of large cracks (Fig. 3b), which are the result of the film being very glassy [48]. The ATH particles are less than one micrometer in size (Fig.…”

Section: Resultsmentioning

confidence: 95%

Aluminum hydroxide multilayer assembly capable of extinguishing flame on polyurethane foam

et al. 2015

Self Cite

View full text Add to dashboard Cite

Polyurethane foam found in household furnishings and bedding creates a severe fire hazard, resulting in loss of life and property each year. In an effort to reduce the flammability of polyurethane foam, a polyelectrolyte multilayer (PEM) coating, comprised of polyethylenimine and polyacrylic acid-stabilized aluminum hydroxide (ATH), was deposited onto foam using layer-by-layer (LbL) assembly. PEM coatings with and without incorporation of ATH were deposited and compared to assess the effectiveness of ATH on flame suppression. All recipes resulted in conformal coatings, maintaining the open cellular structure of the foam. Only three bilayers of PEI/ PAA-ATH retained the shape of foam after exposure to a butane torch flame for 10 s. With six bilayers, the flame was extinguished, which prevented flashover. Cone calorimetry revealed that this 6 BL coated foam exhibited a 64 % reduction in peak heat release rate and a 44 % reduction in maximum average rate of heat emission. This work demonstrates an extraordinarily effective flame-retardant nanocoating that uses environmentally benign chemistry and relatively few deposition steps, prepared using LbL assembly.

show abstract

Highly Size‐Selective Ionically Crosslinked Multilayer Polymer Films for Light Gas Separation

Abstract: Exceptionally high hydrogen permselectivity, exceeding that of any polymeric or porous inorganic systems, is achieved using an ionically crosslinked multilayer polymer thin film.

Cited by 45 publications

References 67 publications

Recent Advances in Gas Barrier Thin Films via Layer-by-Layer Assembly of Polymers and Platelets

Recent Advances in Gas Barrier Thin Films via Layer-by-Layer Assembly of Polymers and Platelets

Carbon Nanotube Multilayer Nanocoatings Prevent Flame Spread on Flexible Polyurethane Foam

Aluminum hydroxide multilayer assembly capable of extinguishing flame on polyurethane foam

Contact Info

Product

Resources

About