Proton conducting sol–gel sulfonated membranes produced from 2-allylphenol, 3-glycidoxypropyl trimethoxysilane and tetraethyl orthosilicate

The copolymers of N-vinylpyrazole with vinyl chloride and methyl methacrylate were obtained by radical polymerization. Constants reactivity and microstructure parameters of copolymers were calculated and their properties were studied. The sol-gel synthesis of obtained copolymers with tetraethyl orthosilicate results in a hybrid organic-inorganic composites. Films with proton conductivity to 7.8·10-3 S·sm-1 were formed on the basis the copolymers and composites.

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Proton-conducting sol–gel hybrids containing heteropoly acids

Solid State Ionics ◽

10.1016/s0167-2738(01)00920-1 ◽

2001 ◽

Vol 145 (1-4) ◽

pp. 109-118 ◽

Cited By ~ 70

Author(s):

U Lavrenčič Štangar ◽

N Grošelj ◽

B Orel ◽

A Schmitz ◽

Ph Colomban

Keyword(s):

Sol Gel ◽

Heteropoly Acids ◽

Proton Conducting

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Fabrication of sulfonated poly(ether ether ketone)-based hybrid proton-conducting membranes containing carboxyl or amino acid-functionalized titania by in situ sol–gel process

Journal of Power Sources ◽

10.1016/j.jpowsour.2014.11.132 ◽

2015 ◽

Vol 276 ◽

pp. 271-278 ◽

Cited By ~ 50

Author(s):

Yongheng Yin ◽

Tao Xu ◽

Guangwei He ◽

Zhongyi Jiang ◽

Hong Wu

Keyword(s):

Amino Acid ◽

Sol Gel ◽

Proton Conducting ◽

Ether Ether Ketone ◽

Poly Ether Ether Ketone ◽

Sol Gel Process ◽

Ether Ketone ◽

Conducting Membranes ◽

Sulfonated Poly

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Monitoring the Tetraethyl Orthosilicate (TEOS)-Based Sol–Gel Process with Cu(II) Ions as a Spin Probe

Applied Magnetic Resonance ◽

10.1007/s00723-015-0724-x ◽

2015 ◽

Vol 47 (1) ◽

pp. 1-12 ◽

Cited By ~ 5

Author(s):

M. Mazúr ◽

L. Husáriková ◽

M. Valko ◽

C. J. Rhodes

Keyword(s):

Spin Probe ◽

Sol Gel ◽

Tetraethyl Orthosilicate ◽

Sol Gel Process

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Preparation of Porous Silica by Microemulsion Coupling with Sol-Gel Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.113-116.2266 ◽

2010 ◽

Vol 113-116 ◽

pp. 2266-2270

Author(s):

Jing Li ◽

Wei Xue ◽

Yong Zhao ◽

Zhi Miao Wang

Keyword(s):

Sol Gel ◽

Porous Silica ◽

Tetraethyl Orthosilicate ◽

Large Specific Surface Area ◽

Silicon Source ◽

Effect Of Solvent ◽

Texture Properties ◽

Sol Gel Process ◽

Novel Method ◽

Hcl Concentration

A novel method of microemulsion coupling with sol–gel process was used for preparation of porous silica using tetraethyl orthosilicate as silicon source. Effect of solvent and catalyst on the surface texture properties was investigated respectively. The results showed that porous silica with large specific surface area (738.65 m2/g) and high pore volume (2.01 cm3/g) was obtained. However, the mesopores in silica were arranged in disorder and showed great ununiformity in shape and arrangement. To obtain porous silica with desired texture properties, an appropriate dosage of ethanol and higher HCl concentration were needed.

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Proton-conducting Organic-inorganic Sulfo-containing Membranes for Fuel Cell

Materials Science ◽

10.5755/j02.ms.28440 ◽

2021 ◽

Author(s):

Inga GRIGORAVICIUTE-PURONIENE ◽

Iryna YEVCHUK ◽

Oksana DEMCHYNA ◽

Mariia ZHYHAILO ◽

Khrystyna RYMSHA ◽

...

Keyword(s):

Proton Conductivity ◽

Sol Gel ◽

Structural Heterogeneity ◽

Silica Content ◽

Inorganic Materials ◽

Inorganic Component ◽

Proton Conducting ◽

Glycol Diacrylate ◽

Silica Membranes ◽

Component Content

Cross-linked organiс-inorganic sulfo-containing membranes of various compositions based on acrylic monomers (acrylonitrile, acrylic acid, 3-sulfopropylacrylate potassium salt, ethylene glycol diacrylate) and sol-gel systems of tetraethoxysilane have been developed. Synthesis of the polymer matrix was carried out by UV-initiated polymerization of the monomer mixture and the inorganic component was formed in situ while conducting the sol-gel process of the precursor. FTIR, SEM, EDS, DMA, impedance spectroscopy were used to characterize the synthesized materials. The influence of inorganic component content on the properties of the membranes was investigated. DMA results show that an increase in silica content leads to a decrease in packing density and an increase in structural heterogeneity in sulfo-containing polyacrylate/silica membranes. The highest values of proton conductivity 1.12 ꞏ 10−2 Sm/cm at 60 °C were found in membranes containing 3 wt.%. of the added sol-gel system. Further increase of silica content does not increase the proton conductivity of the membranes. The proton transfer activation energies in the membranes were calculated from the temperature dependence of proton conductivity. The obtained cross-linked sulfo-containing organic-inorganic materials can be used for the development of proton-conducting membranes for fuel cells.

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Molecular Building Blocks in Low PH Silicon Sol-Gels: A Silicon-29 NMR Study

MRS Proceedings ◽

10.1557/proc-121-519 ◽

1988 ◽

Vol 121 ◽

Cited By ~ 3

Author(s):

Larry W. Kelts ◽

Nancy J. Armstrong

Keyword(s):

Sol Gel ◽

Building Blocks ◽

Low Ph ◽

Tetraethyl Orthosilicate ◽

Compact Ring ◽

Molar Ratios ◽

Molecular Building Blocks ◽

Nmr Study ◽

Ring Structures ◽

Silicon Sol

ABSTRACTHigh field Silicon-29 NMR is used to study the structural intermediates in tetramethyl and tetraethyl orthosilicate (TMOS and TEOS) low pH sol-gel reactions. Linear oligomers as well as ring components of various sizes are identified and their evolution in the sols is followed. Differences in the number of compact ring structures are related to differences in gel times. Reactions are followed for various silicon alkoxide:water:acid molar ratios.

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Interlayer-free Glucose Carbonised Template Silica Membranes for Brine Water Desalination

MATEC Web of Conferences ◽

10.1051/matecconf/201928003010 ◽

2019 ◽

Vol 280 ◽

pp. 03010 ◽

Cited By ~ 2

Author(s):

Dwi Rasy Mujiyanti ◽

Muthia Elma ◽

Mufidah Amalia

Keyword(s):

Sol Gel ◽

Tetraethyl Orthosilicate ◽

Water Desalination ◽

Molar Ratio ◽

Solution Temperature ◽

Nacl Solution ◽

Silica Membranes ◽

Salt Ions ◽

Sol Gel Process ◽

Free Glucose

Interlayer-free glucose carbonized template silica membranesbased on tetraethyl orthosilicate (TEOS) and glucose were successfullyprepared using an acid-base catalysed sol-gel method for artificial brinewater desalination (7.5% wt NaCl solution %) at temperatures range from25, 40 and 60 °C. These membranes calcined at 250 and 400 °C. Themembranes were fabricated through sol-gel process by using TEOS(tetraethyl orthosilicate); ethanol; nitric acid; ammonia; aquadest andglucose as a template. By molar ratio is 1: 38: 0.0007: 0.0003: 5 and0.25%; 0.5%, 1% w/v glucose as template. The results show the highestwater fluxes of 1.8, 2.2 and 4.8 kg m−2 h−1 for 25, 40 and 60 °Cdesalination process with excellent salt rejections of 99.5, 99.5 and 99.7%, respectively. It was found that the higher the NaCl solution temperature asfeed solution as well as glucose concentration (0.25% to 1% wt) astemplate attached in the silica matrixes, the higher water fluxes eventhough the salt rejection remain the same. This study demonstrates that theorganosilica membranes offered the carbonized silica mesostructuremembranes with excellent separation of water from the hydrated salt ions, particularly for processing brine salt solutions.

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