Deepthi, Krishnan; Amal, Raj R. B.; Rajeev, V. R.; Unni, K. N. Narayanan; Gowd, E. Bhoje
Directed Assembly of Hierarchical Supramolecular Block Copolymers: A Strategy To Create Donor–Acceptor Charge-Transfer Stacks
Macromolecules, 2019, vol 52, 7, pp. 2889-2899DOI:10.1021/acs.macromol.8b02448Visit the full articleBack to the overview
Self-Assembly Investigations of Sulfonated Poly(methyl methacrylate- block -styrene) Diblock Copolymer Thin Films
Piñón-Balderrama, Claudia; Leyva-Porras, César; Olayo-Valles, Roberto; Revilla-Vázquez, Javier; Schubert, Ulrich S.; Guerrero-Sanchez, Carlos; Bonilla-Cruz, José
Poly(methyl methacrylate- block -styrene) block copolymers (BCs) of low dispersity were selectively sulfonated on the styrenic segment. Several combinations of degree of polymerization and volume fraction of each block were investigated to access different self-assembled morphologies. Thin films of the sulfonated block copolymers were prepared by spin-coating and…
Electrospun PCL-protein scaffolds coated by pyrrole plasma polymerization
Cruz, Yeyzon; Muñoz, Efrén; Gomez-Pachón, E. Y.; Morales-Corona, Juan; Olayo-Lortia, Jesús; Olayo, Roberto; Olayo-Valles, Roberto
Polymeric scaffolds prepared from polycaprolactone (PCL), PCL-collagen and PCL-elastin were prepared by electrospinning. The scaffolds were coated by plasma polymerization of pyrrole doped with iodine, to improve cellular adhesion and fibroblast proliferation. The morphology, composition, and crystalline structure of the scaffolds were characterized by scanning electron microscopy (SEM),…
Multiscale Self-Assembly of a Phenyl-Flanked Diketopyrrolopyrrole Derivative: A Solution-Processable Building Block for π-Conjugated Supramolecular Polymers
Wang, Kai; Bohra, Hassan; Gonçalves, Rui A.; Bhatnagar, Harshangda; Wu, Yingjie; Wang, Xiaochen; Wang, Zheng; Wei, Xin; Lam, Yeng Ming; Wang, Mingfeng
We report a solution-processable π-conjugated molecular building block (denoted as PhDPP) consisting of a rigid and planar core of phenyl-flanked diketopyrrolopyrrole and “soft” branched alkoxy chains that endow the solubility in a variety of organic solvents. Intermolecular hydrogen bonding in PhDPP was revealed in nonpolar solvents above a threshold of…
Highly compressive and stretchable poly(ethylene glycol) based hydrogels synthesised using pH-responsive nanogels without free-radical chemistry
Nguyen, Nam T.; Milani, Amir H.; Jennings, James; Adlam, Daman J.; Freemont, Anthony J.; Hoyland, Judith A.; Saunders, Brian R.
Poly(ethylene glycol) (PEG) based hydrogels are amongst the most studied synthetic hydrogels. However, reports on PEG-based hydrogels with high mechanical strength are limited. Herein, a class of novel, well-defined PEG-based nanocomposite hydrogels with tunable mechanical strength are synthesised via ring-opening reactions of diglycidyl ethers with carboxylate ions. The pH responsive…
Hard–Soft Carbon Composite Anodes with Synergistic Sodium Storage Performance
Xie, Fei; Xu, Zhen; Jensen, Anders C. S.; Au, Heather; Lu, Yaxiang; Araullo‐Peters, Vicente; Drew, Alan J.; Hu, Yong-Sheng; Titirici, Maria-Magdalena
A series of hard–soft carbon composite materials is produced from biomass and oil waste and applied as low-cost anodes for sodium-ion batteries to study the fundamentals behind the dependence of Na storage on their structural features. A good reversible capacity of 282 mAh g−1 is obtained at a current density…
A high-performance BaTiO 3 -grafted-GO-laden poly(ethylene oxide)-based membrane as an electrolyte for all-solid lithium-batteries
Angulakshmi, N.; Prasanna Kar, Goutam; Bose, Suryasarathi; Bhoje Gowd, E.; Thomas, Sabu; Manuel Stephan, A.
Nanocomposite polymer electrolytes (NCPEs) comprising poly(ethylene oxide) (PEO), barium titanate-grafted-graphene oxide (BaTiO3-g-GO) and lithium bis(trifluoromethanesulfonyl imide) (LiTFSI) were prepared by a simple hot-press technique. An increase of two orders of magnitude in the ionic conductivity was achieved upon incorporation of BaTiO3-g-GO in the polymeric matrix even at 0 °C. The
Combining Small-Angle X-ray Scattering and X-ray Powder Diffraction to Investigate Size, Shape and Crystallinity of Silver, Gold and Alloyed Silver-Gold Nanoparticles
Garcia, P. R. A. F.; Loza, K.; Daumann, S.; Grasmik, V.; Pappert, K.; Rostek, A.; Helmlinger, J.; Prymak, O.; Heggen, M.; Epple, M.; Oliveira, C. L. P.
The combination of simultaneous measurements of small and wide angle X-ray scattering (SAXS/WAXS–SWAXS) to investigate the overall size, shape, and crystallinity of silver nanoparticles and alloyed silver-gold nanoparticles in the size range of 8 to 80 nm is shown. The obtained results for overall size are in agreement with the…
Partial Transformation of Imogolite by Decylphosphonic Acid Yields an Interface Active Composite Material
Lange, Tobias; Charpentier, Thibault; Gobeaux, Frédéric; Charton, Sophie; Testard, Fabienne; Thill, Antoine
The phosphonic acid moiety is commonly used as an anchoring group for the surface modification of imogolite. However, the impact of the reaction on its structure has never been clearly analyzed before. We study the reaction of imogolite and decylphosphonic acid by combining infrared spectroscopy, X-ray scattering, scanning electron microscopy,…
3D visualisation of hepatitis B vaccine in the oral delivery vehicle SBA-15
Rasmussen, Martin K.; Kardjilov, Nikolay; Oliveira, Cristiano L. P.; Watts, Benjamin; Villanova, Julie; Botosso, Viviane Fongaro; Sant’Anna, Osvaldo A.; Fantini, Marcia C. A.; Bordallo, Heloisa N.
Developing a technology that enables oral vaccines to work efficiently remains a considerable effort since a number of difficulties must be addressed. The key objective being to ensure the safe passage through the harsh conditions within the gastrointestinal tract, promoting delivery that induces enhanced immune response. In the particular case…