Supramolecular Structures of Chitosan on the Surface of Fumed Silica

Kulyk, T. V.; Palyanytsya, B.B.; Borodavka, T. V.; Borysenko, M.V.

doi:10.1007/978-90-481-2309-4_21

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…To ascertain the immobilization of chitosan onto the surface of mesoporous silica, FT-IR spectroscopy was employed to characterize initial chitosan, silica and chitosan-modified silica. Similar features were seen for initial chitosan and silica, as well as unmodified hybrid materials as was reported earlier [3,20], i. e., bands at 1700 cm -1 and 1550 cm -1 in the spectrum of chitosan (Fig. 2, curve 1) confirm the presence amino groups in the initial polymer.…”

Section: Resultssupporting

confidence: 87%

Chitosan Immobilized on Silica Surface for Wastewater Treatment

Budnyak

Тертых

Yanovska

2014

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Adsorbents of natural origin are widely used for industrial wastewater treatment in order to replace current costly methods of heavy metals removing from solutions. For that purpose, immobilization of chitosan on the silica gel surface by crosslinking of adsorbed biopolymer with glutaraldehyde was carried out. Anchorage of chitosan on the silica surface was confirmed by IR spectroscopy. Concentration of immobilized chitosan was estimated using thermogravimetric analysis. The adsorption of microquantities of Zn(II), Cu(II), Cd(II), Pb(II), Fe(III), V(V) and Mo(VI) ions from aqueous solutions by obtained composite has been studied. The highest sorption capacities were observed with respect to zinc (0.46 mmol/g), molybdenum-and vanadium-containing ions (0.31 mmol/g). Diffuse reflectance electronic spectra of samples with different content of adsorbed metal and kinetic adsorption characteristics of the composite adsorbent were estimated.

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Section: Resultssupporting

confidence: 87%

Chitosan Immobilized on Silica Surface for Wastewater Treatment

Budnyak

Тертых

Yanovska

2014

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“…Moreover, the characteristic peak at m/z 125 common to amino sugars is observed in the mass spectrum [ 34 ]. Pyrolysis of SPhMDPOBn on the silica surface is more complex.…”

Section: Resultsmentioning

confidence: 99%

Investigation of chemical transformations of thiophenylglycoside of muramyl dipeptide on the fumed silica surface using TPD-MS, FTIR spectroscopy and ES IT MS

et al. 2014

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In this study, chemical transformations of benzyl ester of О-(phenyl-2-acetamido-2,3-dideoxy-1-thio-β-d-glucopyranoside-3-yl)-d-lactoyl-l-alanyl-d-isoglutamine (SPhMDPOBn) on the fumed silica surface were examined, and the surface complex structure was characterized by temperature-programmed desorption mass spectrometry (TPD-MS), infrared spectroscopy (FTIR) and electrospray ion trap mass spectrometry (ES IT MS). Stages of pyrolysis of SPhMDPOBn in pristine state and on the silica surface have been determined. Probably, hydrogen-bonded complex forms between silanol surface groups and the C = O group of the acetamide moiety NH-(CH3)-C = O…H-O-Si≡. The thermal transformations of such hydrogen-bonded complex result in pyrolysis of SPhMDPOBn immobilized on the silica surface under TPD-MS conditions. The shifts ∆ν of amide I band (measured from 1,626 to 1,639 cm−l for SPhMDPOBn in pristine state) of 33 and 35 cm−l which occurred when SPhMDPOBn was immobilized on the silica surface may be caused by a weakening of the intramolecular hydrogen bonding of the SPhMDPOBn because the interaction with the silica surface as hydrogen bond with silanol groups is weaker than that in associates.

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Dextran-silica hybrid materials: production, adsorption, thermal transformations and structure of the adsorption layer

Kulik¹

2018

Polim. z.

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Supramolecular Structures of Chitosan on the Surface of Fumed Silica

Cited by 3 publications

References 8 publications

Chitosan Immobilized on Silica Surface for Wastewater Treatment

Chitosan Immobilized on Silica Surface for Wastewater Treatment

Investigation of chemical transformations of thiophenylglycoside of muramyl dipeptide on the fumed silica surface using TPD-MS, FTIR spectroscopy and ES IT MS

Dextran-silica hybrid materials: production, adsorption, thermal transformations and structure of the adsorption layer

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