The Structures and Physicochemical Properties of Mixtures of Water-Soluble Polymers

Рашидова, С. Ш.; Воропаева, Н. Л.; Nikonovich, G. V.; Burkhanova, N. D.; Yugay, S. M.; Pulatova, H. P.; Ibragimov, I. Sh.; Ruban, I. N.

doi:10.1365/s10337-004-0231-y

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…Their intensities decreased with increasing CMCh content. Similar results of XRD analysis were reported in literature for PVA/chitosan hydrogels [ 20 ], PVA/carboxymethyl cellulose [ 25 ] and similar XRD chart was obtained in case of PVA/carboxymethyl chitosan blend hydrogels by the same author in this research [ 26 ]. Therefore, addition of CMCh suppresses the capacity of PVA to crystallize into nanogels.…”

Section: Resultssupporting

confidence: 91%

Synthesis and Characterization of Carboxymethyl Chitosan Nanogels for Swelling Studies and Antimicrobial Activity

2012

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Nanogels of a binary system of carboxymethyl chitosan (CMCh) and poly- (vinyl alcohol) PVA, were successfully synthesized by a novel in situ process. They were also characterized by various analytical tools like Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and X-ray diffraction (XRD). They were studied for their unique swelling properties in water and different pH solutions. They were also investigated for their great ability to capture or isolate bacteria and fungi from aquatic environments.

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Section: Resultssupporting

confidence: 91%

Synthesis and Characterization of Carboxymethyl Chitosan Nanogels for Swelling Studies and Antimicrobial Activity

2012

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“…In PVA blends, this may imply an interaction between the components. Similar results are reported for both PVA/chitosan hydrogels and CMCh/PVA 39, 40…”

Section: Resultssupporting

confidence: 87%

Crosslinked poly(vinyl alcohol)/carboxymethyl chitosan hydrogels for removal of metal ions and dyestuff from aqueous solutions

Sabaa

Mohamed

El-Taweel

et al. 2011

J of Applied Polymer Sci

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Hydrogels composed of poly(vinyl alcohol) (PVA) and carboxymethyl chitosan (CMCh) were synthesized via ultraviolet (UV) irradiation that can be used in several industrial fields. Several analysis tools were used to characterize the physical and thermal properties of CMCh/PVA hydrogels namely FT-IR, scanning electron microscope (SEM), XRD, thermogravimetric analysis (TGA), and differential scanning calorimetery (DSC). TGA results showed that CMCh/PVA hydrogels are thermally more stable than CMCh and their thermal stability increases as PVA content increases in the hydrogel. Also, DSC results showed that CMCh/PVA hydrogels are at least partial miscible blends. Moreover, the swelling behavior of the CMCh/PVA hydrogels was studied in different buffered solutions and in different salt solutions at various concentrations. CMCh/PVA hydrogels swell much more than CMCh especially at alkaline pH. Both metal and dye uptake were studied for CMCh/PVA hydrogels. The hydrogels adsorb much more dyestuff and metal ions like Cu 2þ , Cd 2þ , and Co 2þ than CMCh itself. Much dyestuff and metal ions are adsorbed by the hydrogels as PVA content increases in the hydrogel.

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“…One of the procedures for obtaining biodegradable materials involves the preparation of compositions (blends), containing, besides the polymeric basis, some organic either native or modified fillers (starch, cellulose, amylose, amylopectin and dextrin), which are assimilated by microorganisms in the process of biodegradation. Special interest has been generated by the investigations devoted to biodegradable products based on water-soluble polymer blends (pectin-polyvinylalcohol (PVA), polyvinylacetate-PVA, starch-PVA, chitosan-PVA, PVA-PVP, pectin-starch, etc) [1].…”

Section: Introductionmentioning

confidence: 99%

Surface modifications of some nanocomposites containing starch

Pascu¹,

Popescu²,

Vasile³

2008

J. Phys. D: Appl. Phys.

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Polymer-layered silicate nanocomposites have attracted strong interest in today's materials research, due to the possible impressive enhancements of material properties, comparatively with those of pure polymers. Several starch/poly(vinylalcohol)/montmorillonite nanocomposites have been subjected to surface modification by physical treatments such as dielectric barrier discharge (DBD) exposure and coating with proteins (albumin) or polysaccharides (chitosan), for improving their biocompatibility. Untreated and treated surfaces have been comparatively studied by contact angle measurements, FT-IR and 2D-FT-IR spectroscopy and optical microscopy. It has been established that enhancement of the surface characteristics depends on the type and number of incorporated nanoparticles as well as on the treatment applied. Coupling of DBD exposure and coating techniques appears to be highly efficient.

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The Structures and Physicochemical Properties of Mixtures of Water-Soluble Polymers

Cited by 5 publications

References 4 publications

Synthesis and Characterization of Carboxymethyl Chitosan Nanogels for Swelling Studies and Antimicrobial Activity

Synthesis and Characterization of Carboxymethyl Chitosan Nanogels for Swelling Studies and Antimicrobial Activity

Crosslinked poly(vinyl alcohol)/carboxymethyl chitosan hydrogels for removal of metal ions and dyestuff from aqueous solutions

Surface modifications of some nanocomposites containing starch

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