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Nafion membrane channel structure studied by small-angle X-ray scattering and Monte Carlo simulations

Fernandez Bordín, S. P.; Andrada, H. E.; Carreras, A. C.; Castellano, G. E.; Oliveira, R. G.; Galván Josa, V. M.

Customer publications

Nafion membrane channel structure studied by small-angle X-ray scattering and Monte Carlo simulations

Fernandez Bordín, S. P.; Andrada, H. E.; Carreras, A. C.; Castellano, G. E.; Oliveira, R. G.; Galván Josa, V. M.

The structure of Nafion 117 membranes was studied through SAXS experiments and 2D pattern simulations. Measurements were taken for different moisture conditions by synchrotron radiation, and for different temperatures through X-ray tube irradiation. The experimental profiles were fitted through simulations based on a new structural model including: the amorphous polymer…
Direct formation of form I’ crystals in polybutene-1/polypropylene blend enhanced by cold crystallization

Zhong, Zhenxing; Ge, Huan; Su, Zhaohui

Customer publications

Direct formation of form I’ crystals in polybutene-1/polypropylene blend enhanced by cold crystallization

Zhong, Zhenxing; Ge, Huan; Su, Zhaohui

During commercial processing of isotactic polybutene-1 (PB-1), crystallization kinetics favor form II while thermodynamics favor the more desired form I/I′, and once the former is adopted, transformation to the latter is extremely slow. In this work, the cold crystallization behavior of PB-1/iPP (isotactic polypropylene) blend (90/10) is investigated with emphasis…
Structural and Nonlinear Optical Characteristics of In Vitro Glycation of Human Low-Density Lipoprotein, as a Function of Time

de Queiroz Mello, Ana Paula; Albattarni, Ghadeer; Espinosa, Daniel Humberto Garcia; Reis, Dennys; Figueiredo Neto, Antonio Martins

Customer publications

Structural and Nonlinear Optical Characteristics of In Vitro Glycation of Human Low-Density Lipoprotein, as a Function of Time

de Queiroz Mello, Ana Paula; Albattarni, Ghadeer; Espinosa, Daniel Humberto Garcia; Reis, Dennys; Figueiredo Neto, Antonio Martins

Modified low-density lipoprotein (LDL) is a well-known risk marker for diabetes and cardiovascular disease. In vitro and in vivo studies have shown that native LDL particles, when modified by oxidation and/or glycation processes, become proatherogenic. Other studies have shown that high LDL concentrations also contribute to atherogenic diseases. In the…
The Influence of Space Restriction on the Mechanical Properties of Isotactic Polypropylene/Reduced Graphene Oxide Nanocomposite Injection Bars

Yao, Guibin; Fang, Yuwei; Chi, Enyi; Bao, Jinbiao; Zhang, Li; Li, Yiguo; Zhang, Jianqiang; Wang, Zongbao

Customer publications

The Influence of Space Restriction on the Mechanical Properties of Isotactic Polypropylene/Reduced Graphene Oxide Nanocomposite Injection Bars

Yao, Guibin; Fang, Yuwei; Chi, Enyi; Bao, Jinbiao; Zhang, Li; Li, Yiguo; Zhang, Jianqiang; Wang, Zongbao

Isotactic polypropylene (iPP)/reduced graphene oxide (RGO) nanocomposite bars were prepared by injection molding and the effects of RGO on the iPP matrix were investigated via differential scanning calorimetry, two dimensional wide angle X-ray diffraction (2D WAXD) and small angle X-ray scattering (2D SAXS) techniques. It is demonstrated that RGO is…
Enhancing the Mechanical Properties of Glassy Nanocomposites by Tuning Polymer Molecular Weight

Genix, Anne-Caroline; Bocharova, Vera; Kisliuk, Alexander; Carroll, Bobby; Zhao, Sheng; Oberdisse, Julian; Sokolov, Alexei P.

Customer publications

Enhancing the Mechanical Properties of Glassy Nanocomposites by Tuning Polymer Molecular Weight

Genix, Anne-Caroline; Bocharova, Vera; Kisliuk, Alexander; Carroll, Bobby; Zhao, Sheng; Oberdisse, Julian; Sokolov, Alexei P.

The addition of nanoparticles to a polymer matrix is a well-known process to improve the mechanical properties of polymers. Many studies of mechanical reinforcement in polymer nanocomposites (PNCs) focus on rubbery matrices; however, much less effort concentrates on the factors controlling the mechanical performance of the technologically important glassy PNCs.…
Thermo-chemically tuning of active basic sites on nanoarchitectured silica for biodiesel production

Sánchez Faba, Edgar M.; Ferrero, Gabriel O.; Dias, Joana M.; Eimer, Griselda A.

Customer publications

Thermo-chemically tuning of active basic sites on nanoarchitectured silica for biodiesel production

Sánchez Faba, Edgar M.; Ferrero, Gabriel O.; Dias, Joana M.; Eimer, Griselda A.

In the design of catalysts, an extremely important point is to determine, control and increase the availability of active sites on the surface. In the present work, active sodium oxide species have been identified and it is demonstrated how its dispersion can be suitably improved by combining sodium loading degree…
Grafted polyrotaxanes as highly conductive electrolytes for lithium metal batteries

Imholt, Laura; Dörr, Tobias S.; Zhang, Peng; Ibing, Lukas; Cekic-Laskovic, Isidora; Winter, Martin; Brunklaus, Gunther

Customer publications

Grafted polyrotaxanes as highly conductive electrolytes for lithium metal batteries

Imholt, Laura; Dörr, Tobias S.; Zhang, Peng; Ibing, Lukas; Cekic-Laskovic, Isidora; Winter, Martin; Brunklaus, Gunther

Hyperbranched polymers comprised of polyrotaxanes as mechanically stable backbone and grafted polycaprolactone (PCL) side chains are utilized as solid polymer electrolyte for application in lithium metal (LMBs) and lithium ion batteries (LIBs). The polyrotaxanes were obtained from self-assembly of Cyclodextrin (CD) host molecules threading onto polyethylenoxide (PEO) chains. In particular,…
A Translucent Nanocomposite with Liquid Inclusions of a Responsive Nanoparticle Dispersion

Doblas, David; Hubertus, Jonas; Kister, Thomas; Kraus, Tobias

Customer publications

A Translucent Nanocomposite with Liquid Inclusions of a Responsive Nanoparticle Dispersion

Doblas, David; Hubertus, Jonas; Kister, Thomas; Kraus, Tobias

Active nanocomposites are created with liquid inclusions that contain plasmonic gold nanoparticles inside a polymeric matrix. The alkylthiol-coated gold particles are designed to reversible agglomerate at certain temperatures, which changes the plasmonic coupling and thus optical properties. It is found that particles confined to the liquid inclusions inside the active…