Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F15%3A43900256" target="_blank" >RIV/60461373:22340/15:43900256 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23640/15:43926192

Výsledek na webu

<a href="http://link.springer.com/article/10.1007/s10853-015-9206-7" target="_blank" >http://link.springer.com/article/10.1007/s10853-015-9206-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10853-015-9206-7" target="_blank" >10.1007/s10853-015-9206-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

Popis výsledku v původním jazyce

We prepared poly(vinyl alcohol) (PVA)/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes in a single step using the solution casting method. The structure, morphology, and properties of these nanocomposite membranes were characterized by Raman spectroscopy, atomic force microscopy, small- and wide-angle X-ray scattering, thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis (DMA). The influence of silica and GA loading on the meso-scale characteristics of the composite membranes was investigated. The results showed that silica deposited in the form of small nanoparticles (~1 nm) in the PVA/SiO2 membranes, while bigger submicron particles (>25 nm) were formed in the PVA/SiO2/GA membranes. The water uptake of the PVA/SiO2 membranes increased with temperature, but the PVA/SiO2/GA membranes were completely dissolved above 50 oC. We can therefore conclude that the addition of GA deteriorated the properties of PVA/SiO2 membranes. The thermal stability of the PVA/SiO2 membranes increased with the increasing silica loading with a maximum char yield of 46 % for PVA/SiO2/4T. Even DMA profiles indicated a promising increase in E R (rubbery modulus) from 6 MPa (PVA membrane) to 1015 MPa (PVA/SiO2/4T) at 250 oC, showing high mechanical strength of these membranes.

Název v anglickém jazyce

Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

Popis výsledku anglicky

We prepared poly(vinyl alcohol) (PVA)/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes in a single step using the solution casting method. The structure, morphology, and properties of these nanocomposite membranes were characterized by Raman spectroscopy, atomic force microscopy, small- and wide-angle X-ray scattering, thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis (DMA). The influence of silica and GA loading on the meso-scale characteristics of the composite membranes was investigated. The results showed that silica deposited in the form of small nanoparticles (~1 nm) in the PVA/SiO2 membranes, while bigger submicron particles (>25 nm) were formed in the PVA/SiO2/GA membranes. The water uptake of the PVA/SiO2 membranes increased with temperature, but the PVA/SiO2/GA membranes were completely dissolved above 50 oC. We can therefore conclude that the addition of GA deteriorated the properties of PVA/SiO2 membranes. The thermal stability of the PVA/SiO2 membranes increased with the increasing silica loading with a maximum char yield of 46 % for PVA/SiO2/4T. Even DMA profiles indicated a promising increase in E R (rubbery modulus) from 6 MPa (PVA membrane) to 1015 MPa (PVA/SiO2/4T) at 250 oC, showing high mechanical strength of these membranes.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

R - Projekt Ramcoveho programu EK

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Materials Science

ISSN

0022-2461

e-ISSN

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Svazek periodika

50

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

6477-6490

Kód UT WoS článku

000358149600024

EID výsledku v databázi Scopus

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