Novel polyolefin/silicon dioxide/H3PO4 composite membranes with spatially heterogeneous structure for phosphoric acid fuel cell

Gruzd, Alexey; Трофимчук, Е. С.; Никонорова, Н. И.; Nesterova, E. A.; Meshkov, I. B.; Gallyamov, Marat O.; Khokhlov, Alexei R.

doi:10.1016/j.ijhydene.2013.01.124

Cited by 21 publications

(7 citation statements)

References 53 publications

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“…() conditions were found under which the deformation of amorphous glassy and crystalline polymers in liquid media occurs through the crazing mechanism and gives rise to the formation of nanoporous materials with a porosity as high as 40–60%. It is of particular interest that polymer deformation in solutions of various low‐ or high‐molecular‐mass compounds is accompanied by their penetration into the nanoporous structure of crazes to result in the formation of nanocomposites and highly dispersed polymer–polymer blends (Trofimchuk & Yablokova, ; Trofimchuk et al ., , b, ; Rukhlya et al ., ; Gruzd et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Atomic force microscopic study of the structure of high‐density polyethylene deformed in liquid medium by crazing mechanism

Bagrov

Yarysheva

Rukhlya

et al. 2013

Journal of Microscopy

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SummaryA procedure has been developed for the direct atomic force microscopic (AFM) examination of the native structure of highdensity polyethylene (HDPE) deformed in an adsorption-active liquid medium (AALM) by the crazing mechanism. The AFM investigation has been carried out in the presence of a liquid medium under conditions preventing deformed films from shrinkage. Deformation of HDPE in AALM has been shown to proceed through the delocalized crazing mechanism and result in the development of a fibrillar-porous structure. The structural parameters of the crazed polymer have been determined. The obtained AFM images demonstrate a nanosized nonuniformity of the deformation and enable one to observe the structural rearrangements that take place in the deformed polymer after removal of the liquid medium and stress relaxation. A structural similarity has been revealed between HDPE deformed in the AALM and hard elastic polymers.

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Section: Introductionmentioning

confidence: 97%

Atomic force microscopic study of the structure of high‐density polyethylene deformed in liquid medium by crazing mechanism

Bagrov

Yarysheva

Rukhlya

et al. 2013

Journal of Microscopy

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“…7). Difficulties are associated with preparation of the water-insoluble polymers [40][41][42][43][44][45] , and conditioning their hydrophile / hydrophobic properties. Waterinsoluble membranes based on polyphosphazenes can be prepared by crosslinking, introduction of alkyl groups to the aromatic ring of the side chains or by varying the degree of sulfonation of the polymer 46 .…”

Section: Hydrocarbon Polymeric Membranes Including Partially Fluorinatedmentioning

confidence: 99%

Proton-Exchange Membranes Based on Sulfonated Polymers

Sedesheva¹,

Ivanov²,

Wozniak³

et al. 2016

Orient. J. Chem

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Review is dedicated to discussion of different types of proton-exchange membranes used in fuel cells (FC). One of the most promising electrolytes is polymer electrolyte membrane (PEM). In recent years, researchers pay great attention to various non-fluorinated or partially fluorinated hydrocarbon polymers, which may become a real alternative to Nafion. Typical examples are sulfonated polyetheretherketones, polyarylene ethers, polysulphones, polyimides. A class of polyimides-based hydrocarbon proton-exchange membranes is separately considered as promising for widespread use in fuel cell, such membranes are of interest for our further experimental development.

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“…Moreover, an opportunity arises for changing or supplementing the functional properties of a material by incorporating a third component. This approach was, for the first time, described in our work, which was devoted to the preparation of medium‐temperature proton‐conductive three‐component composite membranes based on polyolefins (polypropylene, polyethylene, etc. ), silica, and orthophosphoric acid (PA).…”

Section: Introductionmentioning

confidence: 99%

Polyethylene–Silica Nanocomposites with the Structure of Semi‐Interpenetrating Networks

Трофимчук

Meshkov

Kandlina

et al. 2019

Macro Materials & Eng

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Organic–inorganic nanocomposites with the structure of interpenetrating or semi‐interpenetrating networks are considered as advanced materials, since they have improved thermal and mechanical properties. An alternative approach to the preparation of such hybrid systems is proposed. It is based on the synthesis of silica from the precursor of hyperbranched polyethoxysiloxane by the hydrolytic condensation reaction in the volume of pores of a polymer matrix (bulk porosity is 40 vol%) stretched via the environmental crazing mechanism. Polyethylene–silica nanocomposites with the structure of semi‐interpenetrating networks when the content of silica is not less than 20–25 wt% are obtained. These composites can undergo an additional phase separation at a temperature of 160 °C (above the melting point of polyethylene), which is accompanied by an increase in the size of the polymer phase with the formation of macrophases. At the same time, the environment (orthophosphoric acid), in which the composite is heated, fills the pores that have appeared. As a result, the content of the third component with the new functionality increases up to 50 wt%, which allowed us to impart proton‐conducting properties to the composite material and preserve its shape stability.

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Novel polyolefin/silicon dioxide/H3PO4 composite membranes with spatially heterogeneous structure for phosphoric acid fuel cell

Cited by 21 publications

References 53 publications

Atomic force microscopic study of the structure of high‐density polyethylene deformed in liquid medium by crazing mechanism

Atomic force microscopic study of the structure of high‐density polyethylene deformed in liquid medium by crazing mechanism

Proton-Exchange Membranes Based on Sulfonated Polymers

Polyethylene–Silica Nanocomposites with the Structure of Semi‐Interpenetrating Networks

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