Summary What is known about this topic?The emerging H5Ny lineages of the avian influenza virus(AIV)with genomic reassortments have posed a continuous threat to animals and human beings.Since the first case of avian in...Summary What is known about this topic?The emerging H5Ny lineages of the avian influenza virus(AIV)with genomic reassortments have posed a continuous threat to animals and human beings.Since the first case of avian influenza A(H5N6)virus infection in 2014,the World Health Organization has reported a total of 38 cases by August 6,2021.展开更多
An approach for preparation of a novel composite anion exchanger composed of polystyrene/divinylbenzene (PS/DVB) beads and quaternized nanodiamods (QND) were proposed. Oxidized nanodiamonds (OND) were quaternized by t...An approach for preparation of a novel composite anion exchanger composed of polystyrene/divinylbenzene (PS/DVB) beads and quaternized nanodiamods (QND) were proposed. Oxidized nanodiamonds (OND) were quaternized by the condensation polymerization between methylamine (MA) and 1,4-butanediol diglycidyl ether (BDDE), which were characterized by Fourier transform infrared (FTIR) spectra, X-ray phtoelectron spectroscopy (XPS), thermogravimetric analysis (TGA). QND with layers of cationic polyelectrolyte was attached onto the surface of sulfonated PS/DVB beads electrostatically. Subsequently, hyperbranched reaction of QND agglomerated on the PS/DVB bead surface was performed by the alternate reaction between MA and BDDE to increase the exchange capacity. The composite anion exchanger showed good stability in organic solvent and a wide pH range.The surface of these microspheres was characterized by scanning electron microscopy. In addition, ion exchange selectivity and separation efficiency of the anion exchangers were assessed using the mixtures of anions (F,Cl,NO_2,Br,NO_3,HPO_4~2 and SO_4~2) with carbonate/bicarbonate as eluent, and the anion exchanger with high exchange capacity could be used to analyze chloride in aqueous solution with high concentration of fluoride. This work explores the potential of nanodiamods as an agglomerated material for ion chromatography stationary phases for the separation of inorganic anions.展开更多
基金Supported by the National Natural Science Foundation of China(No.82041033)Sichuan Science and Technology Program(2020FYS0015+1 种基金2020FYS0017)W.J.L.supported by the Excellent Young Scientist Program of the NSFC(No.81822040).
文摘Summary What is known about this topic?The emerging H5Ny lineages of the avian influenza virus(AIV)with genomic reassortments have posed a continuous threat to animals and human beings.Since the first case of avian influenza A(H5N6)virus infection in 2014,the World Health Organization has reported a total of 38 cases by August 6,2021.
基金financially supported by the National Natural Science Foundation of China (No. 51503182)Analysis and Measurement Foundation of Zhejiang Province(No. 2017C37064)+1 种基金Zhejiang Provincial Natural Science Foundation (No. LQ15C200006)Zhejiang University of Technology Natural Science Foundation (No. 2014XY002)
文摘An approach for preparation of a novel composite anion exchanger composed of polystyrene/divinylbenzene (PS/DVB) beads and quaternized nanodiamods (QND) were proposed. Oxidized nanodiamonds (OND) were quaternized by the condensation polymerization between methylamine (MA) and 1,4-butanediol diglycidyl ether (BDDE), which were characterized by Fourier transform infrared (FTIR) spectra, X-ray phtoelectron spectroscopy (XPS), thermogravimetric analysis (TGA). QND with layers of cationic polyelectrolyte was attached onto the surface of sulfonated PS/DVB beads electrostatically. Subsequently, hyperbranched reaction of QND agglomerated on the PS/DVB bead surface was performed by the alternate reaction between MA and BDDE to increase the exchange capacity. The composite anion exchanger showed good stability in organic solvent and a wide pH range.The surface of these microspheres was characterized by scanning electron microscopy. In addition, ion exchange selectivity and separation efficiency of the anion exchangers were assessed using the mixtures of anions (F,Cl,NO_2,Br,NO_3,HPO_4~2 and SO_4~2) with carbonate/bicarbonate as eluent, and the anion exchanger with high exchange capacity could be used to analyze chloride in aqueous solution with high concentration of fluoride. This work explores the potential of nanodiamods as an agglomerated material for ion chromatography stationary phases for the separation of inorganic anions.
