A novel approach for highly proton conductive electrolyte membranes with improved methanol barrier properties: Layer-by-Layer assembly of salt containing polyelectrolytes

Yılmaztürk, Serpil; Deligöz, Hüseyin; Yılmazoğlu, Mesut; Damyan, Hakan; Öksüzömer, M.A. Faruk; Koç, Serkan Naci; Durmuş, Ali; Gürkaynak, M. Ali

doi:10.1016/j.memsci.2009.07.019

Cited by 37 publications

(14 citation statements)

References 39 publications

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“…On the other hand, the article26 presents contrary results when a differential TG analysis (under oxygen) is used to assess organic pigment particles with silicone layers deposited by the LBL method. In article,27 minimal changes (below 5°) in TG curves (under nitrogen) were observed after the deposition of PAH and PSS [poly(styrene sulfonate)] layers (up to 40 layers) on the surface of Nafion.…”

Section: Resultsmentioning

confidence: 96%

“…Electrolyte or polyelectrolyte nanolayers can be deposited on various flat surfaces such as mica,16, 17 glass,6, 13, 18–20 quartz,6 gold,21 titanium,22 silicon,15, 18, 23–25 pigment particles,26 polymeric membranes,25, 27, 28 microspheres,29 or finally fibres 7, 24, 30–35. It is now possible to modify flat (nontextile) surfaces to obtain the following properties: anticorrosive,36 antireflective,37 antistatic‐stiffening or nonstiffening,38 antisoiling,39, 40 hydrophobic or hydrophilic,41, 42 or antibacterial properties 43, 44.…”

Section: Introductionmentioning

confidence: 99%

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Student award winner in the Ph.D. category for the 2013 society for biomaterials annual meeting and exposition, april 10–13, 2013, Boston, Massachusetts

Tzeng

Higgins

Pomper

et al. 2013

J Biomedical Materials Res

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Liver cancer is a leading cause of cancer death. Most patients are treated by arterial injection of chemoembolizing agents, providing a convenient avenue for local treatment by novel therapies, including gene therapy. Poly(beta-amino esters) (PBAEs) were synthesized and used to form nanoparticles for non-viral transfection of buffalo rat hepatoma (MCA-RH7777) and hepatocyte (BRL-3A) lines with eGFP and luciferase DNA. Hepatoma cells were transfected with up to 98±0.4% efficacy with no measurable cytotoxicity. Hepatocytes were transfected with as high as 73±0.4% efficacy with 10±4% non-specific cytotoxicity. In contrast, positive controls (branched polyethylenimine, Lipofectamine™ 2000, and X-tremeGENE® DNA HP) caused 30–90% toxicity in BRL-3A cells at doses required for >50% transfection. Of the 21 optimized PBAE-DNA formulations tested, 12 showed significant specificity for hepatoma cells over hepatocytes in monoculture (P<0.05 for both percentage transfected and eGFP expression intensity). Top polymers from eGFP studies also delivered luciferase DNA with 220±30-fold and 470±30-fold greater specificity for hepatoma cells than hepatocytes. Transfections of co-cultures of hepatoma and hepatocytes with eGFP DNA also showed high specificity (1.9±0.1- to 5.8±1.4-fold more transfected hepatoma cells than hepatocytes, measured by percentage transfected and flow cytometry). By eGFP intensity, up to 530±60-fold higher average expression per cell was measured in hepatoma cells. One top formulation caused 95±0.2% transfection in hepatoma cells and 27±0.2% in hepatocytes (96±9% relative hepatocyte viability). PBAE-based nanoparticles are a viable strategy for liver cancer treatment, delivering genes to nearly 100% of cancer cells while maintaining high biomaterial-mediated specificity to prevent toxic side-effects on healthy hepatocytes.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Student award winner in the Ph.D. category for the 2013 society for biomaterials annual meeting and exposition, april 10–13, 2013, Boston, Massachusetts

Tzeng

Higgins

Pomper

et al. 2013

J Biomedical Materials Res

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“…Despite the great application potential of the LbL self‐assembly in PEMs, no information is available on SPPESK LbL self‐assembly membrane in literature so far. Moreover, most relative studies put emphasis merely on the influence of polyelectrolyte multilayer, pH, and ionic strength . Little is known about the effects of DS of substrate membrane on the performance of PEMs.…”

Section: Introductionmentioning

confidence: 99%

Modification of SPPESK proton exchange membranes through layer‐by‐layer self‐assembly

Sun

Zhen

et al. 2015

J of Applied Polymer Sci

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Sulfonated poly(phthalazinone ether sulfone ketone) (SPPESK) composite membranes are fabricated through electrostatic layer-by-layer (LbL) self-assembly method with chitosan (CS) and phosphotungstic acid (PWA) to enhance the proton conductivity and stability. The results demonstrate that LbL self-assembly has different effects on the SPPESK membrane substrates with different sulfonation degrees (DSs). It elevates proton conductivity of the SPPESK membrane of lower DS and enhances swelling stability of the SPPESK membrane of higher DS. For instance, at 808C, proton conductivity of the SPPESK0.74/(CS/PWA) 1 membrane (lower DS) increases by 16%-96.49 mS cm 21 , and swelling ratio of the SPPESK1.01/(CS/PWA) 3 membrane (higher DS) decreases from 58 to 29%. Attribute to the electrostatic interaction and ion cross-linking networks, permeability of the SPPESK0.74/(CS/PWA) 3 membrane and the SPPESK1.01/(CS/PWA) 5 membrane are reduced by 45 and 30%, respectively. The results indicate that the LbL selfassembly has broadened the available DS range for fuel cell applications.

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“…Deligoz et al prepared PAH/PSS [193] and PVH/PSS [194] multilayered PEC membranes on Nafion supporting membranes, and studied their PEMFC performances. Generally, proton conductivity and methanol barrier properties of multilayered PEC membrane were influenced by the concentration and pH of polyelectrolyte dipping solutions, types and concentrations of added salt, charge density and chemical structures of assembly components, and so on.…”

Section: Multilayered Pec Membranes For Pemfcmentioning

confidence: 99%

Polyelectrolyte complex membranes for pervaporation, nanofiltration and fuel cell applications

Zhao

et al. 2011

Journal of Membrane Science

227

104

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A novel approach for highly proton conductive electrolyte membranes with improved methanol barrier properties: Layer-by-Layer assembly of salt containing polyelectrolytes

Cited by 37 publications

References 39 publications

Student award winner in the Ph.D. category for the 2013 society for biomaterials annual meeting and exposition, april 10–13, 2013, Boston, Massachusetts

Student award winner in the Ph.D. category for the 2013 society for biomaterials annual meeting and exposition, april 10–13, 2013, Boston, Massachusetts

Modification of SPPESK proton exchange membranes through layer‐by‐layer self‐assembly

Polyelectrolyte complex membranes for pervaporation, nanofiltration and fuel cell applications

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