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472352
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显示 1-27 共 27 条结果 关于 "472352" 范围 论文
Lin-feng Zhou et al.
Journal of chromatography. A, 1256, 15-21 (2012-08-14)
A simple and facile needle-adapter was designed for constructing manual on-line polymer monolith microextraction-high performance liquid chromatography (PMME-HPLC). A capillary poly(4-vinylpyridine-co-ethylene glycol dimethacrylate) [poly(VP-co-EGDMA)] monolith was prepared by in situ polymerization, using 4-vinylpyridine (VP) and ethylene glycol dimethacrylate (EGDMA) as
Victor W T Shum et al.
Pharmaceutical research, 29(2), 500-510 (2011-09-06)
Crosslinked, degradable derivatives of low-molecular-weight polyethylenimine (PEI) are relatively efficient and non-cytotoxic gene delivery agents. To further investigate these promising materials, a new synthetic approach was developed using a poly(4-vinylpyridine)-supported Fe(III) catalyst (PVP(Fe(III))) that provides more facile synthesis and enhanced
Zenghe Liu et al.
Analytical chemistry, 84(7), 3403-3409 (2012-03-20)
Continuous glucose measurement has improved the treatment of type 1 diabetes and is typically provided by externally powered transcutaneous amperometric sensors. Self-powered glucose sensors (SPGSs) could provide an improvement over these conventionally powered devices, especially for fully implanted long-term applications
Biomimetic surface coatings for atmospheric water capture prepared by dewetting of polymer films.
Stuart C Thickett et al.
Advanced materials (Deerfield Beach, Fla.), 23(32), 3718-3722 (2011-07-19)
Nader Ghaffari Khaligh
Ultrasonics sonochemistry, 19(4), 736-739 (2012-01-17)
A simple and convenient procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes is described through a one-pot condensation of 2-naphthol with aryl aldehydes in the presence of poly(4-vinylpyridinium)hydrogen sulfate as an efficient, cheap, readily synthesized and eco-friendly catalyst in a solvent free
Rita Rodrigues et al.
Materials (Basel, Switzerland), 7(12), 8189-8196 (2014-12-22)
We report on the efficiency improvement of organic solar cells (OPVs) based on the low energy gap polyfluorene derivative, APFO-3, and the soluble C60 fullerene PCBM, upon addition of a residual amount of poly (4-vinylpyridine) (PVP). We find that the
Md Rafiqul Islam et al.
Journal of nanoscience and nanotechnology, 13(5), 3546-3549 (2013-07-19)
A nanocomposite of TiO2 nanoparticle with an electroactive poly(4-vinylpyridine) (PVP) was synthesized via a simple surface thiol-lactam initiated radical polymerization upon grafting from protocol. This can be achieved through the primary modification of the TiO2 surface with a silane coupling
A Eckelt et al.
Macromolecular rapid communications, 33(22), 1933-1937 (2012-08-21)
A reliable method to decide whether two polymers A and B are miscible or incompatible would be very helpful in many ways. In this contribution we demonstrate why traditional procedures cannot work. We propose to use the intrinsic viscosities [η]
Christy D Petruczok et al.
Advanced materials (Deerfield Beach, Fla.), 24(48), 6445-6450 (2012-09-27)
A simple, efficient, and scalable method for patterning microstructures on curved substrates is demonstrated. Initiated chemical vapor deposition is used to synthesize a thin film that crosslinks upon UV exposure. Polymeric features are defined on glass rods with high curvature
Nader Ghaffari Khaligh et al.
Ultrasonics sonochemistry, 20(1), 26-31 (2012-08-28)
Poly(4-vinylpyridinium) perchlorate, is a supported, recyclable, eco-benign catalyst for synthesis of substituted coumarins via Pechmann reaction using ultrasound irradiation at room temperature and neat condition in high yields with short reaction times. The catalyst was studied by FT-IR, X-ray diffraction
Hui Wang et al.
Journal of colloid and interface science, 365(1), 178-183 (2011-10-04)
A general method has been developed to determine the ionization constants of polymer thin films based on the stimuli-responsiveness of the polymer. Robust polymer films were fabricated on silicon wafers and gold slides using perfluorophenyl azide (PFPA) as the coupling
Sampa Saha et al.
ACS applied materials & interfaces, 3(8), 3042-3048 (2011-07-07)
Atom transfer radical polymerization (ATRP) is commonly used to grow polymer brushes from Au surfaces, but the resulting film thicknesses are usually significantly less than with ATRP from SiO(2) substrates. On Au, growth of poly(methyl methacrylate) (PMMA) blocks from poly(tert-butyl
Hanieh Ghadimi et al.
Analytica chimica acta, 765, 70-76 (2013-02-16)
A novel glassy carbon electrode (GCE) modified with a composite film of poly (4-vinylpyridine) (P4VP) and multiwalled carbon nanotubes (P4VP/MWCNT GCE) was used for the voltammetric determination of paracetamol (PCT). This novel electrode displayed a combined effect of P4VP and
Hong-Lei Wang et al.
Langmuir : the ACS journal of surfaces and colloids, 27(16), 9880-9889 (2011-07-20)
Multilayers of manganese(III) porphyrin-linked poly(vinylpyridinium) (MnTMPyP-PVPMe) polyelectrolyte and poly(styrenesulfonic acid-o-maleic) acid (PSS) have been assembled on gold, quartz, and indium tin oxide surfaces by a layer-by-layer (LBL) technique. The assembly process was monitored by measuring their absorption spectra and frequency
Kohei Uosaki et al.
Journal of the American Chemical Society, 132(48), 17271-17276 (2010-11-17)
Interfacial structures of alkylated polyvinylpyridine (Cn-PVP) brushes with various side chain lengths (n = 2, 6, 12) in dry nitrogen, water vapor, liquid water, and aqueous electrolyte solution were investigated by sum frequency generation (SFG) spectroscopy. The SFG spectra of
Tuan Manh Nguyen et al.
Archives of microbiology, 201(2), 155-161 (2018-12-19)
A strictly aerobic, orange-pigmented strain was isolated and designated as UCM-25T. This strain is capable of degrading aniline and benzene, while is also producing antimicrobial compounds which inhibit the growth of some common pathogenic microbes. A near full-length 16S rRNA
Ihsan Amin et al.
Small (Weinheim an der Bergstrasse, Germany), 7(5), 683-687 (2011-03-04)
For the development of polymer carpets as active devices for micro- and nanotechnology, a control of the polymer carpet morphology and especially control of the stimulus responsive polymer brush is needed. Here, we report on the first example for the
Joanna Lim Wee Ling et al.
Talanta, 88, 477-483 (2012-01-24)
A new poly(4-vinyl pyridine) (P4VP) based cadmium (Cd)-ion selective electrode (ISE) was developed. The 4-vinyl pyridine (4VP) was first polymerized electrochemically on the surface of graphite, later characterized by FTIR, SEM/EDX and then optimized as ISE for Cd. At optimal
Laura Maggini et al.
ChemSusChem, 6(2), 367-373 (2012-12-15)
Herein, we report the first example of a supramolecular carbon nanotube (CNT)-based magnetic depolluting agent for divalent metal ion (M(2+)) removal from aqueous solutions. In particular, magnetic multi-walled carbon nanotubes (m-MWCNTs) coated with poly(vinylpyridine) (PVPy) self-aggregate in aqueous solutions that
Jian-Hua Qiu et al.
Journal of colloid and interface science, 354(1), 152-159 (2010-11-19)
Poly(4-vinylpyridine) (P4VP) brushes were grafted onto microporous polysulfone (PSF) membranes via surface-initiated atom transfer radical polymerization (SI-ATRP) and then immobilized copper (II) ions on the modified membrane. Copper-loaded membranes exhibited excellent antibacterial properties with the added advantage of repeated use.
Tobias Miller et al.
Pharmaceutical research, 30(2), 584-595 (2012-11-09)
To gain mechanistic insights into drug loading and lyophilization of polymeric micelles. PEGylated poly-4-(vinylpyridine) micelles were loaded with dexamethasone. Three different methods were applied and compared: O/W emulsion, direct dialysis, cosolvent evaporation. Micellar dispersions with the highest drug load were
Jim D Roach et al.
Water research, 45(3), 1387-1393 (2010-11-18)
An application of polyelectrolyte-enhanced ultrafiltration utilizes cationic polyelectrolytes to electrostatically bind anionic species. The colloid and target anion are then concentrated using an ultrafilter, producing a filtrate with a lower concentration of the target. This study compared the performances of
Akihiro Tai et al.
Carbohydrate research, 346(15), 2511-2514 (2011-09-10)
6-O-Dodecanoyl-2-O-α-D-glucopyranosyl-L-ascorbic acid (6-sDode-AA-2G) was synthesized from 2-O-α-D-glucopyranosyl-L-ascorbic acid and lauric anhydride with a polymer catalyst, poly(4-vinylpyridine), in N,N-dimethylformamide without the introduction of protecting groups. The optimum reaction conditions enabled 6-sDode-AA-2G to be synthesized in a yield of 49.7%. The yield
Stuart C Thickett et al.
Langmuir : the ACS journal of surfaces and colloids, 26(20), 15989-15999 (2010-09-23)
We investigated the morphology and dynamics of the dewetting of metastable poly(4-vinylpyridine) (P4VP) thin films situated on top of polystyrene (PS) thin films as a function of the molecular weight and thickness of both films. We focused on the competition
Jinxin Cao et al.
Journal of colloid and interface science, 381(1), 137-142 (2012-06-09)
We report here a novel protein sequestration method using polymeric colloidal particles prepared by emulsion polymerization with reactive block copolymers. Specifically, poly(4-vinyl-N-ethylpyridine bromide)-block-polymethylacrylate block copolymers were synthesized from reversible addition-fragmentation chain transfer polymerization and used as emulsifiers for emulsion polymerization
Ultrafiltration membranes composed of highly cross-linked cationic polymer gel: the network structure and superior separation performance.
Qifeng Wang et al.
Advanced materials (Deerfield Beach, Fla.), 23(17), 2004-2008 (2011-03-18)
Yang Su et al.
Langmuir : the ACS journal of surfaces and colloids, 27(14), 8983-8989 (2011-06-16)
A facile method of preparing hierarchical hollow silica microspheres containing surface silica nanoparticles (HHSMs) through the sol-gel process of tetraethylorthosilicate employing a quasi-hard template of non-cross-linking poly(4-vinylpyridine) microspheres is proposed. The quasi-hard template contains the inherent catalyst of the basic
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