A new quaternary ammonium salt monomer was synthesized and a quaternary amination of lignin（ noted as QL）, with the monomer was carried out by grafting copolymerization. The products were characterized by Fourier Tr...A new quaternary ammonium salt monomer was synthesized and a quaternary amination of lignin（ noted as QL）, with the monomer was carried out by grafting copolymerization. The products were characterized by Fourier Transform Infrared spectroscopy（ FTIR）. The experimental results indicate that the yield of the monomer was 99.06%, and the conversion of the monomer and the grafting yield of QL were 93.69% and 185.78%, respectively. The feasibility of QL as the flocculant to be applied in color removal of five artificial dyes, erioehrome black T（dye A）, gongo red（dye B ）, direct fast black G （dye C ）, cuprofix blue green B （dye D ）, and acid black ATT （dye E ） was examined. Results show that OL exhihits the favorable flocculation nerformance and high stability.展开更多
Copolymer of acrylic acid grafted polyethylene is used as membrane of ion exchanger.Its preparation and application were reported in many articles. However, its characterization was reported by only a few. In the pres...Copolymer of acrylic acid grafted polyethylene is used as membrane of ion exchanger.Its preparation and application were reported in many articles. However, its characterization was reported by only a few. In the present work, the copolymer is studied with X-ray photoelectron spectroscopy （XPS）. It is shown from the shift of the carboxyl group position in the spectra of C1s level that there are hydrogen-bonds in the copolymer. The grafting degree was characterized by the ratio of different carbon peak areas in the C1s spectra. Therefore, this method is very useful for the qualitative and quantitative展开更多
基金Supported by the National Nature Science Technology Item of of China(No.2005DC105005-01).
文摘A new quaternary ammonium salt monomer was synthesized and a quaternary amination of lignin（ noted as QL）, with the monomer was carried out by grafting copolymerization. The products were characterized by Fourier Transform Infrared spectroscopy（ FTIR）. The experimental results indicate that the yield of the monomer was 99.06%, and the conversion of the monomer and the grafting yield of QL were 93.69% and 185.78%, respectively. The feasibility of QL as the flocculant to be applied in color removal of five artificial dyes, erioehrome black T（dye A）, gongo red（dye B ）, direct fast black G （dye C ）, cuprofix blue green B （dye D ）, and acid black ATT （dye E ） was examined. Results show that OL exhihits the favorable flocculation nerformance and high stability.
文摘Copolymer of acrylic acid grafted polyethylene is used as membrane of ion exchanger.Its preparation and application were reported in many articles. However, its characterization was reported by only a few. In the present work, the copolymer is studied with X-ray photoelectron spectroscopy （XPS）. It is shown from the shift of the carboxyl group position in the spectra of C1s level that there are hydrogen-bonds in the copolymer. The grafting degree was characterized by the ratio of different carbon peak areas in the C1s spectra. Therefore, this method is very useful for the qualitative and quantitative
