Li, Xuke; Lu, Ying; Sun, Yingying; Che, Yihui; Men, Yongfeng
Analysis of Diffuse SAXS Intensity in the Vicinity of Zero Scattering Angle Reveals the Location of the Flexibilizer in Homopolypropylene Compounds
Vistamaxx performance polymer which is one type of propylene-based elastomer acting as the flexibilizer for toughening the homopolypropylene (HPP) was studied using X-ray scattering at wide, small, and ultrasmall angle regimes and dynamic mechanical analysis techniques. The well-overlapped scattering curves at wide angle and ultrasmall angle indicate the unaffected structure…
A multi-functional dual-energy laboratory Mo-Cr-SAXS system
Koppoju, S.
A laboratory small-angle X-ray scattering (SAXS) system with a dual energy (Mo and Cr) source has been designed and established with the aim of studying the heterogeneity in high-Z metallic structural materials such as steels (Fe alloy) and other materials. With the combination of Mo and Cr energies, various camera…
Amino-functionalized breath-figure cavities in polystyrene–alumina hybrid films: effect of particle concentration and dispersion
V, Lakshmi; Raju, Annu; G, Resmi V.; Pancrecious, Jerin K.; D, Rajan T. P.; C, Pavithran
We report the formation of breath-figure (BF) patterns with amino-functionalized cavities in a BF incompatible polystyrene (PS) by incorporating functionalized alumina nanoparticles. The particles were amphiphilic-modified and the modifier ratio was regulated to achieve a specific hydrophobic/hydrophilic balance of the particles. The influence of the physical and chemical properties of…
A lignin-derived sulphated carbon for acid catalyzed transformations of bio-derived sugars
Antonyraj, Churchil A.; Haridas, Ajit
Bio-ethanol plant derived crude lignin was utilized in the synthesis of carbon catalysts for the conversion of xylose in acid pretreatment liquid (APL, another by-product of bio-ethanol plant) into furfural. Also, xylose dehydration to furfural by carbon catalysts carried out in water-MIBK biphasic system showed a maximum yield of 60%…
Aescin Incorporation and Nanodomain Formation in DMPC Model Membranes
Sreij, Ramsia; Dargel, Carina; Moleiro, Lara H.; Monroy, Francisco; Hellweg, Thomas
The saponin aescin from the horse chestnut tree is a natural surfactant well-known to self-assemble as oriented-aggregates at fluid interfaces. Using model membranes in the form of lipid vesicles and Langmuir monolayers, we study the mixing properties of aescin with the phase-segregating phospholipid 1,2-dimyristoyl-sn-glycero-phosphocholine (DMPC). The binary membranes are experimentally…
Microfluidics-based self-assembly of peptide-loaded microgels: Effect of three dimensional (3D) printed micromixer design
Borro, Bruno C.; Bohr, Adam; Bucciarelli, Saskia; Boetker, Johan P.; Foged, Camilla; Rantanen, Jukka; Malmsten, Martin
In an effort to contribute to research in scalable production systems for polymeric delivery systems loaded with antimicrobial peptides (AMPs), we here investigate effects of hydrodynamic flow conditions on microfluidic particle generation. For this purpose, rapid prototyping using 3D printing was applied to prepare micromixers with three different geometric designs,…
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…
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…
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…
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…