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    Recently, more attentions have been paid to natural polymer-based flocculants in water treatment, since they are believed to be low-cost, nontoxic, and environmentally friendly materials. In this work, strong cationic chitosan-based graft copolymer flocculants (3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CTA) modified chitosan-graft-polyacrylamide, denoted as chitosan-CTA-g-PAM) have

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    Preparation of chitosan-graft-polyacrylamide magnetic

    2015-10-01· The chitosan-based magnetic microspheres were employed as adsorbents for the removal of Cu, Pb, and Hg from aqueous solutions. To well understand the molecular interactions between the adsorbents and the adsorbates, the FTIR spectra of two magnetic adsorbents before and after adsorption of Cu, Pb, and Hg ions have been measured and shown in Fig. 2.

  • preparation of chitosan-graft-polyacrylamide magnetic

    Preparation of chitosan-graft-polyacrylamide magnetic

    2015-10-01· 1. J Colloid Interface Sci. 2015 Oct 1;455:261-70. doi: 10.1016/j.jcis.2015.05.043. Epub 2015 May 29. Preparation of chitosan-graft-polyacrylamide magnetic composite microspheres for enhanced selective removal of mercury ions from water.

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    Chitosan-graft-Polyacrylamide adsorbent for Sulphate removal from water . Conference Paper (PDF Available) · November 2015 with 1,158 Reads How we measure 'reads' A 'read' is counted each time

  • thermo-thickening behavior and its mechanism in a

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    A novel thermo-thickening behavior of a chitosan-g-polyacrylamide (CS-g-PAM, GPAM) aqueous solution is reported for the first time in this work. The viscosity of GPAM aqueous solutions significantly increases above a critical temperature upon heating, as observed in dynamic and steady rheological experiments

  • advances in chitosan-based superabsorbent hydrogels

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    Ferfera-Harrar et al. elaborated superabsorbent composite-type semi-IPNs composed of grafted network chitosan-graft-polyacrylamide as a matrix and carboxymethylcellulose as entrapped soluble polysaccharide. 8 The presence of CMC in the composites affected the enzymatic degradation rates in both lysozyme and active slurry solutions.

  • the flocculating properties of chitosan-graft

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    The Flocculating Properties of Chitosan-graft-Polyacrylamide Flocculants (I)-Effect of the Grafting Ratio Article in Journal of Applied Polymer Science 117(4) · August 2010 with 45 Reads

  • microwave enhanced synthesis of chitosan-graft

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    Chitosan-graft-polyacrylamide (Ch-g-PAM) was synthesized without any radical initiator or catalyst using microwave (MW) irradiation.Under optimal grafting conditions, 169% grafting was observed at 80% MW power in 1.16 min. Conventionally under similar conditions a maximum grafting of 82% could be achieved in 1 h using K 2 S 2 O 8 /ascorbic acid as redox initiator coupled with Ag + ions as

  • microwave enhanced synthesis of chitosan-graft

    Microwave enhanced synthesis of chitosan-graft

    T1 Microwave enhanced synthesis of chitosan-graft-polyacrylamide molecularly imprinted polymer (MIP) for selective extraction of antioxidants. AU Saifuddin, N. AU Yasumira, A. A.Nur. PY 2010/1/1. Y1 2010/1/1. N2 Polymers have been molecularly imprinted for the purpose of binding specifically to α-tocotrienol (vitamin E). A

  • chitosan-graft-acrylamide polyelectrolytes: synthesis

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    A series of chitosans have been grafted with quaternary ammonium cationic monomers, as well as acrylamide using Ce(IV) to induce macroradical formation on the polysaccharide backbone. The materials, which...

  • adsorptive removal of nickel from aqueous solution by palm

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    Prof. Dr. Mustafa Tümer Director I certify that this thesis satisfies the requirements as a thesis for the degree of Master of Science in Chemistry. Assoc. Prof. Dr. Izzet Sakallı Chair, Department of Chemistry We certify that we have read this thesis and that in our opinion it is fully adequate in

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  • selective adsorption behavior of cd(ii) ion imprinted

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    2017-01-05· Fig. 1 reflected the polymerization schematic mechanism of the Cd(II) ion imprinted polymers. Under the action of emulsifier, oil phase and water phase formed inverse emulsion. In inverse emulsion system, β-cyclodextrin and AM as functional monomer reacted with Cd(II) to form an imprinted polymer under cross-linking ECH and initiator ammonium persulfate.

  • zhen yang school of chemistry and materials science

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    Flocculation of both anionic and cationic dyes in aqueous solutions by the amphoteric grafting flocculant carboxymethyl chitosan-graft-polyacrylamide. Journal of Hazardous Materials, 2013, 254, 36-45 08) Z Yang, H Yan, H Yang, H Li, A Li, R Cheng. Flocculation performance and mechanism of graphene oxide for removal of various contaminants from

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    A number of studies on the interactions between particles and polymer flocculants with SFA and AFM are available. 192-199 For example, Wang et al. 192 studied the effect of solution salinity in the interactions between a chitosan‐graft‐polyacrylamide (chi‐g‐PAM) and mica‐coated surface.

  • journal of applied polymer science : vol 117,no 4

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  • fabrication of bifunctional chitosan-based flocculants

    Fabrication of Bifunctional Chitosan-Based Flocculants

    In this study, a series of chitosan-based quaternary ammonium graft flocculants, namely chitosan-graft-poly(acrylamide and methacryloyl ethyl trimethyl ammonium chloride) [CTS-g-P(AM-DMC)], was successfully synthesized by plasma initiation, and the as-prepared [CTS-g-P(AM-DMC)] had both flocculation and sterilization functions. Various characterization techniques were used to study the

  • materials free full-text fabrication of bifunctional

    Materials Free Full-Text Fabrication of Bifunctional

    Flocculation is one of the most widely used economical and effective technologies for wastewater treatment, and the flocculant that is used has a great influence on the flocculation process [1,2].There is no doubt that the development of flocculants with the characteristics of being economical, highly efficient, and environmentally-friendly is an irresistible trend, which has splendid

  • scientists discover first antiferromagnetic topological

    Scientists discover first antiferromagnetic topological

    2019-12-19· Dr. Anna Isaeva is an associate member of the Cluster of Excellence ct.qmat and Junior Professor for Synthesis and Crystal Growth of Quantum Materials at TU Dresden and the Leibniz Institute for Solid State and Materials Research Dresden (IFW). Together with her group, she works at the interface of chemistry, physics and crystallography on the

  • zhen yang school of chemistry and materials science

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    Flocculation of both anionic and cationic dyes in aqueous solutions by the amphoteric grafting flocculant carboxymethyl chitosan-graft-polyacrylamide. Journal of Hazardous Materials, 2013, 254, 36-45 08) Z Yang, H Yan, H Yang, H Li, A Li, R Cheng. Flocculation performance and mechanism of graphene oxide for removal of various contaminants from

  • adsorptive removal of nickel from aqueous solution by palm

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    Prof. Dr. Mustafa Tümer Director I certify that this thesis satisfies the requirements as a thesis for the degree of Master of Science in Chemistry. Assoc. Prof. Dr. Izzet Sakallı Chair, Department of Chemistry We certify that we have read this thesis and that in our opinion it is fully adequate in

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    Preparation of chitosan-graft-polyacrylamide magnetic composite microspheres for enhanced selective removal of mercury ions from water. Kun Li, Yawen Wang, Mu Huang, Han Yan, Hu Yang, Shoujun Xiao, Aimin Li, J. Colloid Interface Sci. 2015, 455, 261-270

  • researchers defy 19th-century law of physics in 21st

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    2018-11-21· Credit: University of Sussex. Research led by a University of Sussex scientist has turned a 156-year-old law of physics on its head in a development which could lead to more efficient recharging of batteries in cars and mobile phones.

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    Preparation of chitosan-graft-polyacrylamide magnetic composite microspheres for enhanced selective removal of mercury ions from water K Li, Y Wang, M Huang, H Yan, H Yang, S Xiao, A Li Journal of colloid and interface science 455, 261-270,2015

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    LI K, WANG Y, HUANG M, et al. Preparation of chitosan-graft-polyacrylamide magnetic composite microspheres for enhanced selective removal of mercury ions from water[J]. Journal of Colloid & Interface Science, 2015, 455: 261-270.

  • cationic polyacrylamide hydrogels: topics by science.gov

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    2018-01-01· In the current work, a series of amphoteric grafting chitosan-based flocculants (carboxymethyl chitosan-graft-polyacrylamide, denoted as CMC-g-PAM) was designed and prepared successfully. The flocculants were applied to eliminate various dyes from aqueous solutions.

  • microwave-assisted polymer synthesis (maps) as a tool

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    Microwave-assisted polymer synthesis (MAPS) as a tool in biomaterials science How new and how powerf_日语学习_外语学习_教育专区 319人阅读|28次下载. Microwave-assisted polymer synthesis (MAPS) as a tool in biomaterials science How new and how powerf_日语学习_外语学习_教育专区。

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    The Pennsylvania State Univ., USA Visiting Professor, Dept. of Mechanical Eng., Univ. College London, UK a. Corresponding author( [email protected] ) This talk will discuss the use of preceramic polymers to fabricate highly porous ceramics with a wide variety of pore morphology and sizes, ranging from the micro-meso to the macro scales, using a variety of processing approaches.

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    This chapter introduces the research situation of microwave-assisted organic synthesis (MAOS) and some characteristic reaction cases. It also explains why MAOS is a reaction suitable for Green Chemistry (no solvent or water solvent condition).

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    Abstract: The novel cationic flocculant of CMCTS-g-CPAM was synthesized by polymerizing carboxymethyl chitosan (CMCTS), acrylamide (AM) and methacryloyloxyethyl trimethyl ammonium chloride (DMC) under ultraviolet (UV) radiation.The response surface method was adopted to obtain the optimum preparation conditions:illumination time 2 h, initiator mass fraction 0.04%, pH=8.

  • removal of permethrin pesticide from water by chitosan

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