Controlled defects were created on DNA linked 2D colloidal photonic crystals using a Nd:YAG pulsed laser. The 2D photonic crystals were self-assembled using 1.8 μm polystyrene (PS) microspheres on functionalized glas...
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The synthesis of poly(lactic-co-glycolic acid) (PLGA) by the ring opening copolymerization of D,L-lactide and glycolide was performed at 110°C to 130°C using Sn(Oct)2 as catalyst, 1,10-decanediol as initiato...
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In the present study, vapor permeation and pervaporation of aqueous 2‐propanol mixtures were investigated using Torlon ® poly(amide imide) as a membrane material. Torlon membranes preferentially permeated H 2 O ...
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In the present study, vapor permeation and pervaporation of aqueous 2‐propanol mixtures were investigated using Torlon ® poly(amide imide) as a membrane material. Torlon membranes preferentially permeated H 2 O from aqueous 2‐PrOH mixtures both by vapor permeation and pervaporation. Diffusion experiments led to the conclusion that both solubility selectivity and diffusivity selectivity showed a preference for H 2 O. Solubility selectivity is by far the dominant factor governing permselectivity, and as a result, Torlon membranes showed permselectivity toward water in vapor permeation and pervaporation. The present study showed that Torlon ® poly(amide imide) is a membrane material potentially applicable to the dehydration of water miscible organics. [ABSTRACT FROM AUTHOR]
Nondestructive damage sensing and load transfer mechanisms of thermal treated carbon nanotube (CNT) and nanofiber (CNF)/epoxy composites were investigated using electromicromechanical technique. Carbon black (CB) was ...
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The synthesis of poly(lactic-co-glycolic acid) (PLGA) by the ring opening copolymerization of D,L-lactide and glycolide was performed at 110 °C to 130 °C using Sn(Oct)2 as catalyst, 1,10-decanediol as initia...
The synthesis of poly(lactic-co-glycolic acid) (PLGA) by the ring opening copolymerization of D,L-lactide and glycolide was performed at 110 °C to 130 °C using Sn(Oct)2 as catalyst, 1,10-decanediol as initiator in a supercritical sc-CO2 expanded medium at pressures of up to 3,500 psi. Due to the limited monomer solubility in sc-CO2 at low temperatures (70 °C), only Mn = 2,500 is typically obtained. However, molecular weight increases with both temperature and sc-CO2 pressure. Thus, Mn = 13,000 (PDI = 1.28) was obtained at 110 °C–130 °C even in the absence of fluorinated surfactants. Biodegradable drug delivery nanocomposites based on dexamethasone and poly(lactic acid) (PLA) and poly(lactide-co-glycolide) (PLGA) were prepared by the rapid expansion of the corresponding supercritical CHC1F2 solutions (110 °C, 200–300 bar) in air (RESS) and in toluene (RESOLV). The RESS process leads to a broad particle size distribution (100–500 nm) while the RESOLV generates a narrower distribution centered around 100 nm and is accompanied by the formation of a few large particles, most likely due to aggregation.
Nondestructive damage sensing and load transfer mechanisms of thermal treated carbon nanotube (CNT) and nanofiber (CNF)/epoxy composites were investigated using electro-micromechanical technique. Carbon black (CB) was...
Nondestructive damage sensing and load transfer mechanisms of thermal treated carbon nanotube (CNT) and nanofiber (CNF)/epoxy composites were investigated using electro-micromechanical technique. Carbon black (CB) was used only for the comparison. Electro-micromechanical techniques were applied to obtain the fiber damage and stress transferring effect of carbon nanocomposites with their contents. Thermal treatment and temperature affected on apparent modulus and electrical properties on nanocomposites due to enhanced inherent properties of each CNMs. Coefficient of variation (COV) of volumetric electrical resistance can be used to obtain the dispersion degree indirectly for various CNMs. Dispersion and surface modification are very important parameters to obtain improved mechanical and electrical properties of CNMs for multifunctional applications. Further optimized functionalization and dispersion conditions will be investigated for the following work continuously.
polymer blend technology was used to create highly anisotropic membranes for fuel cell applications. An important factor for creating structures of high proton conductivity and low methanol permeability was the applic...
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polymer blend technology was used to create highly anisotropic membranes for fuel cell applications. An important factor for creating structures of high proton conductivity and low methanol permeability was the application of electric fields of selected magnitude and frequency during the formation of the membrane.
Die Grenzflächenaktivität des Augenbohnen‐Mosaikvirus (CPMV) zwischen zwei nichtmischbaren Flüssigkeiten wird mithilfe der Fluoreszenzmarkierung untersucht. Das Titelbild zeigt ein Bänderdiagramm ...
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Die Grenzflächenaktivität des Augenbohnen‐Mosaikvirus (CPMV) zwischen zwei nichtmischbaren Flüssigkeiten wird mithilfe der Fluoreszenzmarkierung untersucht. Das Titelbild zeigt ein Bänderdiagramm von CPMV, fluoreszenzmikroskopische Bilder von Perfluordecalintropfen in Wasser, die von CPMV‐Schichten umgeben sind, und die Struktur eines mit einem fluoreszierenden Farbstoff und Biotin markierten CPMV‐Partikels. In ihrer Zuschrift auf S. 2472 ff. beschreiben T. P. Russell et al. die Bildung robuster Membranen durch Selbstorganisation von CPMV‐Bionanopartikeln an Flüssig‐flüssig‐Grenzflächen.
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