Su, Cui; Shi, Guangyu; Li, Xiaolu; Zhang, Xiuqin; Müller, Alejandro J.; Wang, Dujin; Liu, Guoming
Uniaxial and Mixed Orientations of Poly(ethylene oxide) in Nanoporous Alumina Studied by X-ray Pole Figure Analysis
The orientation of polymers under confinement is a basic, yet not fully understood phenomenon. In this work, the texture of poly(ethylene oxide) (PEO) infiltrated in nanoporous anodic alumina oxide (AAO) templates was investigated by X-ray pole figures. The influence of geometry and crystallization conditions, such as pore diameter, aspect ratio,…
An Insight Into the Physico-Mechanical Signatures of Silylated Graphene Oxide in Poly(ethylene methyl acrylate) Copolymeric Thermoplastic Matrix
Ganguly, Sayan; Mondal, Subhadip; Das, Poushali; Bhawal, Poushali; Das, Tushar Kanti; Ghosh, Sabyasachi; Remanan, Sanjay; Das, Narayan Chandra
Dispersion of graphene as nano-building block in polymer matrix is challenging for developing high strength polymer nanocomposites. Tuning of surface polarity can be an effective pathway to…
Luminescent Water Dispersible Microporous Polymeric Nanospheres
James, Alex; Derry, Matthew; Train, Jennifer; Dawson, Robert
Water-dispersible porous polymeric dispersions (PPDs) have been synthesised by reversible addition-fragmentation chain transfer mediated polymerisation-induced self-assembly (RAFT-mediated PISA). The core-shell particles posses a microporous core formed from divinylbenzene and fumaronitrile while the outer polyethylene glycol shell enables the particles to be dispersible in a wide range of…
Development of Thick Superhydrophilic TiO2–ZrO2 Transparent Coatings Realized through the Inclusion of Poly(methyl methacrylate) and Pluronic-F127
Simon, Sanu M.; Chandran, Anoop; George, Gejo; Sajna, M. S.; Valparambil, Prakashan; Kumi-Barmiah, Eric; Jose, Gin; Biju, P. R.; Joseph, Cyriac; Unnikrishnan, N. V.
A thick coating of hierarchically porous double-templated TiO2–ZrO2–PMMA–PF127 with excellent self-cleaning properties and high transmittance has been developed for the first time on glass substrates using a simple dip-coating technique. Comparative studies of this sample with a thick and transparent coating of single-templated TiO2–ZrO2–PMMA have been performed to probe the…
Loss of bottlebrush stiffness due to free polymers
Storm, Ingeborg M.; Kornreich, Micha; Voets, Ilja K.; Beck, Roy; Vries, Renko de; Stuart, Martien A. Cohen; Leermakers, Frans A. M.
A recently introduced DNA-bottlebrush system, which is formed by the co-assembly of DNA with a genetically engineered cationic polymer-like protein, is subjected to osmotic stress conditions. We measured the inter-DNA distances by X-ray scattering. Our co-assembled DNA-bottlebrush system is one of the few bottlebrushes known to date that shows liquid…
Ordered Mesoporous TiO2 Gyroids: Effects of Pore Architecture and Nb-Doping on Photocatalytic Hydrogen Evolution under UV and Visible Irradiation
Dörr, Tobias Sebastian; Deilmann, Leonie; Haselmann, Greta; Cherevan, Alexey; Zhang, Peng; Blaha, Peter; Oliveira, Peter William de; Kraus, Tobias; Eder, Dominik
Pure and Nb-doped TiO2 photocatalysts with highly ordered alternating gyroid architecture and well-controllable mesopore size of 15 nm via co-assembly of a poly(isoprene)-block-poly(styrene)-block-poly(ethylene oxide) block copolymer are synthesized. A combined effort by electron microscopy, X-ray scattering, photoluminescence, X-ray photoelectron spectroscopy, Raman spectroscopy, and density…
Bioinspired Block Copolymer for Mineralized Nanoporous Membrane
Zhou, Hui-Jun; Yang, Guan-Wen; Zhang, Yao-Yao; Xu, Zhi-Kang; Wu, Guang-Peng
Homoporous membranes fabricated by self-assembled block copolymers (BCPs) have gained growing attention for their easy availability of well-ordered nanostructures for precise separation. However, it remains a challenges to improve the mechanical integrity, hydrophilic properties, and pore functionalities of the existing systems. To this end, we report an organic–mineral composite hybrid…
Design and application of volatilizable solid additives in non-fullerene organic solar cells
Yu, Runnan; Yao, Huifeng; Hong, Ling; Qin, Yunpeng; Zhu, Jie; Cui, Yong; Li, Sunsun; Hou, Jianhui
High-boiling-point solvent additives are commonly used to optimize the device performance of organic solar cells but they make problems for device stability and reproducibility. Here Yu et al. design volatilizable solid additives that can improve the device performance without causing above…
Tailoring the stability and photo-Fenton activity of Fe-modified nanostructured silicates by tuning the metal speciation from different synthesis conditions
Elías, Verónica R.; Ochoa Rodriguez, Pablo A.; Vaschetto, Eliana G.; Pecchi, Gina A.; Huck-Iriart, Cristián; Casuscelli, Sandra G.; Eimer, Griselda A.
The stability and photo Fenton activity of nanoarchitectured silicates modified with Fe by the wet impregnation method were studied as a function of the used solvent, calcination temperature and iron loading. The physicochemical properties were characterized by SAXS, XRD, N2 physisorption, SEM, AA, UV–Vis DR, XPS and TPR. All solids…
Phase Transition and Side-Chain Crystallization of Poly(methyl vinyl ether-alt-maleic anhydride)-g-Alkyl Alcohol Comb-like Polymers
Li, Jing; Wang, Haixia; Kong, Lei; Zhou, Yong; Li, Shuqin; Shi, Haifeng
A series of poly(methyl vinyl ether-alt-maleic anhydride)-g-alkyl alcohol (PVEM -Cn) comb-like polymers were synthesized by a simple esterification reaction between poly(methyl vinyl ether-alt-maleic anhydride) and n-alkyl alcohol with n = 14–26. Thermal property, side-chain crystallization, and phase transition behavior of PVEM-Cn comb-like polymers were investigated by 1H NMR,DSC,…