Synthesis and properties of chitosan-N-dextran graft copolymers

Janciauskaite, Ugne; Rakutyte, Vilma; Miškinis, J.; Makuška, Ričardas

doi:10.1016/j.reactfunctpolym.2007.12.001

Cited by 54 publications

(20 citation statements)

References 35 publications

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“…4B inset) correspond to the amine (-NH-), amide (-NHCO-) and a quaternary ammonium group (N + ), respectively. The peak with binding energies at 401.4 eV is attributed to the positive nitrogen atom from the IDA derivative attached to the modified copolymer electrode [24].…”

Section: Modification Of the Copolymer Film And Its Characterizationmentioning

confidence: 99%

Electrochemical detection of copper ion using a modified copolythiophene electrode

Lin

Cho

Choe

et al. 2009

Electrochimica Acta

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Section: Modification Of the Copolymer Film And Its Characterizationmentioning

confidence: 99%

Electrochemical detection of copper ion using a modified copolythiophene electrode

Lin

Cho

Choe

et al. 2009

Electrochimica Acta

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“…This has been commonly found in the literature. Indeed, without exception, recent publications, [21][22][23] using Ch samples of DD values similar to this study, have deemed it necessary to use 3-4 C1s peaks, 2-3 O1s peaks, and 2-3 N1s peaks to fit their XPS results. The extra peaks are variously described as coming from contaminants and amine salts.…”

Section: Morphological Characterizationmentioning

confidence: 90%

The effect of ethylene oxide sterilization on the surface chemistry andin vitrocytotoxicity of several kinds of chitosan

França

Mbeh

Samani

et al. 2013

J. Biomed. Mater. Res.

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The surfaces of three chitosan samples, differing only in their degrees of deacetylation and of carboxyethyl chitosan were chemically characterized by X-ray photoelectron spectroscopy, time-of-flight secondary ion mass spectroscopy, X-ray diffraction, and Fourier transform infrared, both before and after sterilization with ethylene oxide. Unexpected elemental ratios suggest that surface chemical modification occurred during the processing of the original chitin, with further surface modification on subsequent sterilization, despite previous reports to the contrary. Cell viability was evaluated by direct contact methyl thiazole tetrazolium and lactate dehydrogenase assays between the chitosan particles and A549 human epithelial cells, which demonstrated that the modifications incurred on sterilization are reflected in biocompatibility changes. All the samples were found to be biocompatible and nontoxic before sterilization and remained so subsequently. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2013.

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“…X-ray photoelectron spectroscopy (XPS) wide-scan spectra of the Dt and CS-modified Dt are respectively shown in Figure 6((1)a,(1)b). The signals with binding energies at 399.1 and 285.5 eV, attributable to the N 1s and C 1s species respectively [43,44], appeared in the XPS wide scan spectrum of the CS-modified Dt, clearly suggesting the successful immobilization of CS on the surface of Dt [45]. As shown in Figure 6((2)a), the peak at approximately 401.3 eV corresponds to the protonated N in CS (Ncs) [46].…”

Section: Xps Analysismentioning

confidence: 91%

Adsorption of As(V) from Aqueous Solution on Chitosan-Modified Diatomite

Yang

Gong

Huang

et al. 2020

IJERPH

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A novel chitosan (CS)-modified diatomite (Dt) was prepared by a simple mixture in the mass ratio to remove As(V) from aqueous solution in this research. The CS-modified Dt adsorbent was characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and X-ray powder diffraction (XRD) analysis. The parameters to influence the adsorption of As(V) ion were studied under such conditions as kinetics, adsorption isotherm, and pH effect. The results revealed that adsorption of As(V) was initially rapid and the equilibrium time was reached after 40 min. The optimal value of the pH was 5.0 for better adsorption. The equilibrium data were well fitted to the Langmuir isotherm compared to the Freundlich isotherm, and exhibited the highest capacity and removal efficiency of 94.3% under an initial As(V) concentration of 5 mg/L. The kinetic data were well described by the pseudo-second-order model. In addition, 0.1 M NaOH has the best desorption efficiency of As(V) adsorbed on CS-modified Dt, and the removal efficiency of As(V) was still higher than 90% when after six adsorption-desorption cycles. These results showed that the CS-modified Dt could be considered as a potential adsorbent for the removal of As(V) in aqueous solution.

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Synthesis and properties of chitosan-N-dextran graft copolymers

Cited by 54 publications

References 35 publications

Electrochemical detection of copper ion using a modified copolythiophene electrode

Electrochemical detection of copper ion using a modified copolythiophene electrode

The effect of ethylene oxide sterilization on the surface chemistry andin vitrocytotoxicity of several kinds of chitosan

Adsorption of As(V) from Aqueous Solution on Chitosan-Modified Diatomite

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