The Diophantine equation (bn)x+(2n)y=((b+2)n)z

Tang, Min; Yang, Quan-Hui

doi:10.4064/cm132-1-7

Cited by 12 publications

(18 citation statements)

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“…[ 123 ] By doing just that, layer-by-layer assembly has been able to realize composites with incredible strength and gas barrier. [ 51,113,114 ] LbL has the unique Reproduced with permission. [ 9 ] b) TEM image of a cross-section of a polymer/clay LbL fi lm deposited onto PET, where dark horizontal lines are clay platelets.…”

Section: Nanoclays In Layer-by-layer Assemblymentioning

confidence: 99%

“…The fi rst known report of LbL was the alternate adsorption of micrometer-scale colloidal particles of opposite charges. [ 55 ] Nanoparticle-based LbL fi lms have since been shown to exhibit electrical conductivity, [95][96][97][98][99][100] super hydrophobicity, [101][102][103][104][105] water repellency, [ 106 ] UV absorption, [ 107,108 ] optical fi ltering, [ 109 ] fl ame resistance, [ 110,111 ] strength, [112][113][114][115] and gas barrier [ 50,57,[116][117][118][119][120][121][122] by way of carbon nanotubes, spherical nanoparticles (e.g., TiO 2 and SiO 2 ), or two-dimensional nano platelets (e.g., clay and graphene).…”

Section: Introduction To Layer-by-layer Assemblymentioning

confidence: 99%

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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.

116

100

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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.

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Section: Nanoclays In Layer-by-layer Assemblymentioning

confidence: 99%

Section: Introduction To 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.

116

100

View full text Add to dashboard Cite

show abstract

“…[9][10][11] The selective transport of these ions is of central importance for muscle contraction and expansion. Up to date, Nafion [12,13] and sulfonated polymers such as poly(arylene ether sulfone)s, [14] poly(styrene)s, [15] poly(phenyl sulfone)s, [16] and a sulfonated poly(ether ether ketone)-poly(vinylidene fluoride) [17] blend have been reported in the literature as IPMC actuator materials. However, so far ion selective actuation, as natural muscles do, has not been reported in the literature.…”

Section: Introductionmentioning

confidence: 99%

Ion‐Selective Ionic Polymer Metal Composite (IPMC) Actuator Based on Crown Ether Containing Sulfonated Poly(Arylene Ether Ketone)

Taş

Zoetebier

Sukas

et al. 2016

Macro Materials & Eng

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This study introduces the concept of ion selective actuation in polymer metal composite actuators, employing crown ether bearing aromatic polyether materials. For this purpose, sulfonated poly(arylene ether ketone) (SPAEK) and crown ether containing SPAEK with molar masses suitable for membrane preparation are synthesized. The synthesized polymers are characterized using Nuclear magnetic resonance (NMR) and fourier transform infrared spectroscopy (FTIR) spectroscopy, thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC). Ionic polymer metal composite (IPMC) actuators are fabricated by electroless chemical deposition of a platinum (Pt) layer on both sides of SPAEK and crown‐ether containing SPAEK membranes, resulting in electrode layers of around 120 nm thickness. Actuation experiments demonstrate cation specific responses and bending degrees of the IPMC actuators. Incorporation of crown ether units in the polymer backbone results in an improved and ion‐selective bending displacement compared with SPAEK actuators. S(25)C(50)PAEK actuators show an increased bending displacement of 28% for Na+ and 20% for K+ ions.

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“…Another parameter for controlling the calcifi cation is the pH value. During the calcifi cation process, a pH change in alkaline direction is monitored in the polymer fi lm as well as in the surrounding solution, caused by the cleavage of urea to CO 3 2− and NH 4 + (Figure 1 ). The pH value of the surrounding solution reaches values of up to 9, after a few minutes of calcifi cation.…”

Section: Resultsmentioning

confidence: 99%

“…The layer-by-layer technique allows the production of very regular polymer fi lms in microscopic dimensions. [ 3 ] These fi lms afford CaCO 3 -coatings on their surface using the gas-diffusion method, in which CO 2 diffuses into a Ca 2+ -rich solution. [ 4 ] An interesting approach in this fi eld a macroscopic hydrogel throughout the whole material.…”

Section: Introductionmentioning

confidence: 99%

Post‐Polymerization of Urease‐Induced Calcified, Polymer Hydrogels

Rauner

Buenger

Schuller

et al. 2014

Macromol. Rapid Commun.

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Urease‐induced calcification is an innovative method to artificially produce highly filled CaCO3‐based composite materials by intrinsic mineralization of hydrogels. The mechanical properties of these hybrid materials based on poly(2‐hydroxyethylacrylate) cross‐linked by triethylene glycol dimethacrylate are poor. Increasing the degree of calcification to up to 94 wt% improves the Young's moduli (YM) of the materials from some 40 MPa to more than 300 MPa. The introduction of calcium carbonate affine groups to the hydrogel matrix by copolymerizing acrylic acid and [2‐(methacryloyloxy) ethyl]trimethylammonium chloride, respectively, does not increase the stiffness of the composites. A Young's modulus of more than 1 GPa is achieved by post‐polymerization (PP) of the calcified hydrogels, which proves that the size of the contact area between the matrix and calcium carbonate crystals is the most crucial parameter for controlling the stiffness of hybrid materials. Switching from low Tg to high Tg hydrogel matrices (based on poly(N,N‐dimethyl acrylamide)) results in a YM of up to 3.5 GPa after PP.

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The Diophantine equation (bn)^x+(2n)^y=((b+2)n)^z

Cited by 12 publications

References 0 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

Ion‐Selective Ionic Polymer Metal Composite (IPMC) Actuator Based on Crown Ether Containing Sulfonated Poly(Arylene Ether Ketone)

Post‐Polymerization of Urease‐Induced Calcified, Polymer Hydrogels

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