Wong-Stringer, Michael; Bishop, James E.; Smith, Joel A.; Mohamad, David K.; Parnell, Andrew J.; Kumar, Vikas; Rodenburg, Cornelia; Lidzey, David G.
Efficient perovskite photovoltaic devices using chemically doped PCDTBT as a hole-transport material
It is shown that by chemically doping the carbazole-based conjugated polymer PCDTBT using the molecular materials TBP, LiTFSI and FK209, its conductivity can be increased by a factor of 105 times. Such doped PCDTBT films are used as a hole transport material (HTM) for standard architecture (CH(NH2)2PbI3)0.85(CH3NH3PbBr3)0.15 perovskite solar cells…
Effect of the surfactant alkyl chain length on the stabilisation of lyotropic nematic phases
Akpinar, Erol; Canioz, Cihan; Turkmen, Meric; Reis, Dennys; Neto, Antônio Martins Figueiredo
Lyotropic quaternary mixtures of potassium alkanoates (KCx) and sodium alkyl sulphates (NaCxS), where x is the number of carbon atoms in their alkyl chains, were prepared to investigate the effect of the surfactant alkyl chain length on the stabilisation of lyotropic nematic phases. The lyotropic mixtures investigated were formed by…
Effect of thermal-air ageing treatment on mechanical properties and electromagnetic interference shielding effectiveness of low-cost nano-structured carbon filled chlorinated polyethylene
Mondal, Subhadip; Ganguly, Sayan; Das, Poushali; Bhawal, Poushali; Das, Tushar Kanti; Ravindren, Revathy; Ghosh, Sabyasachi; Das, Narayan Ch.
Easy fabrication of flexible and high-performance polymeric composites for radiation shielding has been prioritized since the last few decades. But most of the materials have been suffering from lack of durability in environmental exposures. Herein, to develop a new flexible composite with significant mechanical robustness and longtime durability, a low…
Effect of the presence of strong and weak electrolytes on the existence of uniaxial and biaxial nematic phases in lyotropic mixtures
Akpinar, Erol; Otluoglu, Kemal; Turkmen, Meric; Canioz, Cihan; Reis, Dennys; Neto, Antônio Martins Figueiredo
The lyotropic mixture of potassium laurate/decanol/water presenting only the uniaxial nematic calamitic phase was doped with one strong (potassium chloride, KCl) and 11 weak electrolytes with phenyl-rings (DL-mandelic acid, benzoic acid, DL-phenyllactic acid, phenylacetic acid, phenol and phenylmethanol) and with cyclohexyl-ring (RS-hexahydromandelic acid, cyclohexanecarboxylic acid,…
Effective enhancement of the creep resistance in isotactic polypropylene by elevated concentrations of DMDBS
Jia, Chenfei; Liao, Xia; Zhu, Jingjun; An, Zhu; Yang, Qi; Li, Guangxian
Isotactic polypropylene (iPP) specimens nucleated with different contents of alpha-phase nucleating agent (1,3:2,4-di(3,4-dimethylbenzylidene) sorbitol, trade name DMDBS) were employed to investigate deformation-induced microstructure evolution during creep deformation. Morphological investigations using scanning electron microscopy showed that the crystalline morphology of nucleated iPP is…
Effects of physical crosslinks on the photoresponse of epoxy-based polymers
Victorel, Marianela; Sáiz, Luciana M.; Galante, María J.; Oyanguren, Patricia A.
The influence of physical crosslinks on the photoinduced anisotropy in epoxy linear polymers with azobenzene and alkyl side groups was studied. Two series of linear epoxy-based polymers were synthesized by reaction between diglycidyl ether of bisphenol A (DGEBA), Disperse Orange-3 (DO3), and dodecylamine (DA). Two strategies of synthesis were employed…
Effects of calcination and activation conditions on ordered mesoporous carbon supported iron catalysts for production of lower olefins from synthesis gas
Oschatz, M.; Deelen, T. W. van; Weber, J. L.; Lamme, W. S.; Wang, G.; Goderis, B.; Verkinderen, O.; Dugulan, A. I.; Jong, K. P. de
Lower C2–C4 olefins are important commodity chemicals usually produced by steam cracking of naphtha or fluid catalytic cracking of vacuum gas oil. The Fischer–Tropsch synthesis of lower olefins (FTO) with iron-based catalysts uses synthesis gas as an alternative feedstock. Nanostructured carbon materials are widely applied as supports for the iron…
Effect of calcium ions on structure and stability of the C1q-like domain of otolin-1 from human and zebrafish
Hołubowicz, Rafał; Wojtas, Magdalena; Taube, Michał; Kozak, Maciej; Ożyhar, Andrzej; Dobryszycki, Piotr
Otolin-1 is a collagen-like protein expressed in the inner ear of vertebrates. It provides an organic scaffold for otoliths in fish and otoconia in land vertebrates. In this study, the expression and purification procedure of C1q-like domain of otolin-1 from human and zebrafish was developed. The structure and stability of…
Effect of aging and alkali activator on the porous structure of a geopolymer
Steins, P.; Poulesquen, A.; Frizon, F.; Diat, O.; Jestin, J.; Causse, J.; Lambertin, D.; Rossignol, S.
Nitrogen sorption and small- and wide-angle X-ray and neutron scattering techniques were used to study the porous structure of geopolymers, inorganic polymers synthesized by reaction of a strongly alkaline solution and an aluminosilicate source (metakaolin). The effects of aging and the use of alkali activators (Na+, K+) of different sizes…
Effect of ammonium and aminosilane montmorillonites organo-clays on the curing kinetics of unsaturated polyester (UP) resin nanocomposites
Vargas, M. A.; Montiel, R.; Vázquez, H.
The curing kinetics of UP nanocomposites prepared by incorporating different amounts of two kinds of organo-montmorillonite (organo-MMT): trimethyloctadecacylammonium chloride (TMOA) and aminopropyl-triethoxysilane (APTES) were studied by non-isothermal differential scanning calorimetry (DSC) experiments. small angle X-ray scattering (SAXS) was used for measuring the d-spacings in the modified…