Odella, Emmanuel; Falcone, R. Darío; Ceolín, Marcelo; Silber, Juana J.; Correa, N. Mariano
Structural Characterization of Biocompatible Reverse Micelles Using Small-Angle X-ray Scattering, 31P Nuclear Magnetic Resonance, and Fluorescence Spectroscopy
The most critical problem regarding the use of reverse micelles (RMs) in several fields is the toxicity of their partial components. In this sense, many efforts have been made to characterize nontoxic RM formulations on the basis of biological amphiphiles and/or different oils. In this contribution, the microstructure of biocompatible…
Transformable masks for colloidal nanosynthesis
Wang, Zhenxing; He, Bowen; Xu, Gefei; Wang, Guojing; Wang, Jiayi; Feng, Yuhua; Su, Dongmeng; Chen, Bo; Li, Hai; Wu, Zhonghua; Zhang, Hua; Shao, Lu; Chen, Hongyu
The synthesis of patchy colloids is limited by poor control over the location and shape of ligand domains. Here, the authors use adaptable polymer masks to protect select areas of the particle during functionalization, allowing them to create patchy colloids with unconventional surface…
Transparent, Anisotropic Biofilm with Aligned Bacterial Cellulose Nanofibers
Wang, Sha; Li, Tian; Chen, Chaoji; Kong, Weiqing; Zhu, Shuze; Dai, Jiaqi; Diaz, Alfredo J.; Hitz, Emily; Solares, Santiago D.; Li, Teng; Hu, Liangbing
Cellulose nanofibrils are attractive as building blocks for advanced photonic, optoelectronic, microfluidic, and bio-based devices ranging from transistors and solar cells to fluidic and biocompatible injectable devices. For the first time, an ultrastrong and ultratough cellulose film, which is composed of densely packed bacterial cellulose (BC) nanofibrils with hierarchical fibril…
Yerba Mate applications: Magnetic response of powders and colloids of iron oxide nanoparticles coated with Ilex paraguariensis derivatives
Mercado, D. Fabio; Cipollone, Mariano; González, Mónica C.; Sánchez, Francisco H.
A co-precipitation synthesis method was used to obtain iron oxide nanoparticles coated with Yerba Mate (Ilex paraguariensis) extract. These particles have a core–shell structure with the iron oxide phase surrounded by an organic shell provided by an organic component which come from the Yerba Mate extract. Obtained nanoparticles were exhaustively…
Temperature-Dependent Order-to-Order Transition of Polystyrene-block-poly(ethylene-co-butylene)-block-polystyrene Triblock Copolymer under Multilayered Confinement
Tan, Xiao; Li, Jiang; Guo, Shaoyun
The order-to-order transition (OOT) plays a key role in the nanotechnological applications of block copolymer (BCP) and is dramatically dependent on the spatial environment. A multilayer-confined space has been fabricated by layer-multiplying coextrusion technology to investigate the OOT mechanism of polystyrene-block-poly(ethylene-co-butylene)-block-polystyrene triblock copolymer (SEBS) under…
Tough and self-recoverable hydrogels crosslinked by triblock copolymer micelles and Fe3+ coordination
Xu, Zuxiang; Li, Jinhui; Gao, Guorong; Wang, Zongbao; Cong, Yang; Chen, Jing; Yin, Jingbo; Nie, Lei; Fu, Jun
Tough hydrogels have great potentials in soft robotics, artificial muscles, tissue replacement, and so on. Here we introduce novel tough hydrogels crosslinked by triblock copolymer (F127DA) micelles and metal coordination. The gels showed outstanding tensile strength (∼1–11 MPa), toughness (∼4–32 MJ m−3), and excellent self-recovery properties (∼56.8–87.2% toughness recovery in…
Synthesis, order-to-disorder transition, microphase morphology and mechanical properties of BAB triblock copolymer elastomers with hard middle block and soft outer blocks
Wang, Wentao; Wang, Xuehui; Jiang, Feng; Wang, Zhigang
A series of BAB-type triblock copolymer elastomers (TBCPEs) with a soft–hard–soft block sequence were synthesized via reversible addition–fragmentation chain transfer (RAFT) polymerization, in which “A” represents the hard block poly(isobornyl acrylate) (PIBA), whereas “B” represents the soft block poly(n-butyl acrylate)-co-poly(1-vinylimidazole) (P(BA-co-VI)) random copolymer. Two considerably…
Structural design, preparation and characterization of light, isotropic and robust statically determined organic frameworks as reusable adsorbents
Yue, H. -B.; Guo, J. W.; Fu, S. Q.; Li, X.; Wen, W. Q.; Jiang, W. Z.; Tong, R.; Haranczyk, M.
Using (bi)adamantane “knots” and p-phenylene “rods” as building blocks, statically determined organic frameworks, viewed and termed as porous organic polymers (POP) were synthesized by Suzuki coupling polycondensation with high yields, 85–94%. The saturation of the polymer linking knot and rod groups was determined by FT-IR and 13C NMR spectroscopy. The…
Effects of oxidation on the physicochemical properties of polyunsaturated lipid membranes
Parra-Ortiz, Elisa; Browning, Kathryn L.; Damgaard, Liv S. E.; Nordström, Randi; Micciulla, Samantha; Bucciarelli, Saskia; Malmsten, Martin
The exposure of biological membranes to reactive oxygen species (ROS) plays an important role in many pathological conditions such as inflammation, infection, or sepsis. ROS also modulate signaling processes and produce markers for damaged tissue. Lipid peroxidation, mainly affecting polyunsaturated phospholipids, results in a complex mixture of oxidized products, which…
β phase PVDF-hfp induced by mesoporous SiO2 nanorods: synthesis and formation mechanism
Yuan, Du; Li, Zibiao; Thitsartarn, Warintorn; Fan, Xiaoshan; Sun, Jiaotong; Li, Hui; He, Chaobin
Poly(vinylidene fluoride) (PVDF) homopolymer and its copolymers in their β phases are the most promising polymeric materials for electroactive devices. In this work, a simple and effective strategy is developed to fabricate β-poly(vinylidene fluoride-co-hexafluoropropylene) (β-PVDF-hfp) with characteristic piezo-/ferro-electric properties using mesoporous SiO2 nanorods. The nanorods offer 2-fold…