Search results

1

Implantation of superabsorbent polymer by magnetic iron oxide particles

100%

Grzesiak M., Szajnecki Ł.

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

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2019

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vol. 74

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issue 2

EN

The aim of this research was to optimise methods of magnetic particles of iron oxides implantation into superabsorbent polymer based on partially neutralized acrylic acid (SAc/AAc) crosslinked with ethylene glycol dimethacrylate (EGDMA). The structure of the obtained materials was confirmed by infrared spectroscopic analysis (FT-IR/ATR). The quality of implantation process was evaluated on the basis of microscopy images. Swelling properties of the obtained implanted materials were also determined.

2

APPLICATION OF CHITOSAN IN THE FORMULATION OF DERMATOLOGICAL HYDROGELS PREPARED ON THE BASIS OF MACROMOLECULAR COMPOUNDS

100%

Szcześniak M., Grimling B., Meler J., Karolewicz B.

Progress on Chemistry and Application of Chitin and its Derivatives

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2018

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vol. 23

179 - 184

EN

The effect of chitosan concentration on the properties of dermatological preparations prepared with 2% methylcellulose and 10% polyvinylpyrrolidone was studied. As the levels of chitosan, propylene glycol-1,2 and glycerol increased, the hardness, consistency and cohesiveness of the hydrophilic gels increased, while the dissipation capacity decreased. Gels based on methylcellulose and chitosan, compared to formulations containing polyvinylpyrrolidone, have a higher rate of loss of volatile compounds, higher pH values for 1,2-propylene glycol formulation and higher texture parameters. The tested hydrogels have good rheological properties, allowing extrusion from the tube and spreading on the skin.

3

The use of hydrogel in afforestation of postindustrial areas

100%

Ptach W., Boczoń A., Wróbel M., Ptach W., Boczoń A., Wróbel M.

Journal of Water and Land Development

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2009

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issue 13B

4

Poly(2-acrylamido-2-methyl-1-propane sulfonic acid-co-1-vinyl-2-pyrrolidone) Hydrogel and its use in the Removal of Cd(II), Pb(II) and Cu(II)

100%

Çavuş S., Çakal E.

Acta Physica Polonica A

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2017

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vol. 132

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issue 3

505-508

EN

Poly(2-acrylamido-2-methyl-1-propanesulfonic acid-co-1-vinyl-2-pyrrolidone), P(AMPS-co-VP), hydrogel was prepared by free radical cross-linking polymerization method. Prepared hydrogel was used in the competitive removal of Cd(II), Pb(II) and Cu(II) ions from aqueous solution. The characterization of P(AMPS-co-VP) before and after sorption was carried out by the Fourier transform infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy. Atomic absorption spectrometer was used to found the concentration of metal ions in the aqueous solution. The selectivity of P(AMPS-co-VP) was as follows: Cd(II)>Pb(II)>Cu(II). Kinetic study showed that competitive removal of heavy metal ions on poly(AMPS-co-VP) was in accordance with a pseudo-second-order model.

5

THE INFLUENCE OF SELECTED POLYMERS ON THE RHEOLOGICAL PROPERTIES OF HYDROGELS WITH CHITOSAN APPLIED ON THE SKIN

100%

Szcześniak M., Grimling B., Meler J., Karolewicz B.

Progress on Chemistry and Application of Chitin and its Derivatives

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2017

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vol. 22

201 - 206

EN

The aim of the study was to evaluate the effect of methylcellulose and carboxymethylcellulose on the rheological properties of hydrogels applied to skin on chitosan in the presence of the additives propylene glycol and glycerol. Rheological studies showed that the tested gels are non-newtonian systems, and have thixotropic properties. Substrates made of methylcellulose and chitosan are characterised by higher shear values than those obtained with carboxymethylcellulose. The addition of polymers had a positive influence on the dispersion of hydrogels, and the addition of excipients increased firmness, consistency and cohesiveness of the gels. Larger increases were observed with the addition of 10% of glycol propylene and glycerol contents for methylcellulose and of 20% of carboxymethylcellulose.

6

APPLICATION OF CHITOSAN IN THE FORMULATION OF HYDROGELS APPLIED ON SKIN

100%

Meler J.

Progress on Chemistry and Application of Chitin and its Derivatives

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2013

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vol. 18

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issue 18

181-186

EN

These studies concerned the effect of composition on the substrate physicochemical parameters of hydrogels for use on skin. Hydrogels containing 1% of hydrocortisone and 1% of chitosan addition was made on the basis of methylcellulose, sodium carboxymethylcellulose and Carbopol 934 P. The release proceeds according to first-order kinetics. Depending on the type and composition of the polymer gels were obtained with various pharmaceutical availability of hydrocortisone. Addition of 1% chitosan affects the acceleration of the release in any given case.

7

APPLICATION OF TEXTURE PROFILE ANALYSIS TO INVESTIGATE THE MECHANICAL PROPERTIES OF THERMOSENSITIVE INJECTABLE CHITOSAN HYDROGELS

88%

Owczarz P., Rył A., Wichłacz Ż.

Progress on Chemistry and Application of Chitin and its Derivatives

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2019

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vol. 24

151 - 163

EN

In this paper, the mechanical properties of hybrid chitosan hydrogels were investigated using the texture profile analysis test. Scaffolds obtained from a polysaccharide of various molecular weights were studied, which, with the addition of glycerophosphate salt, formed a three-dimensional structure in vivo. The obtained systems were also enriched with collagen and calcium carbonate to improve the mechanical properties. The determined texture parameter values indicate that the mechanical properties of the hybrid hydrogel depend on the molecular weight of the polymer, the type of solvent and, the pH-neutralizing substance, as well as the type and concentration of the filler. Moreover, in some cases the TPA test was the only way to evaluate the mechanical properties of the obtained hydrogels due to the inability to determine the Young's modulus. Consequently, the texture analysis test is a valuable tool for selecting solutions depending on the intended application of the scaffolds.

8

PVA hydrogel deformation in response to change in temperature or pH

75%

Kazimierska-Drobny K., Kazimierska-Drobny K.

Bulletin of the Polish Academy of Sciences: Technical Sciences

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2021

9

THE INFLUENCE OF SUBSTRATE COMPOSITION ON THE PHYSICOCHEMICAL PROPERTIES OF HYDROGELS WITH CHITOSAN

75%

Szcześniak M., Grimling B., Meler J., Pluta J.

Progress on Chemistry and Application of Chitin and its Derivatives

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2016

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vol. 21

187-191

EN

The aim of the study was to evaluate the effect of Carbopol 934 P and PVP K 90 on the rheological properties of chitosan gels. Hydrogels were prepared with hydrocortisone containing chitosan, Carbopl 934P, PVP, propylene glycol-1,2 or polyethyleneglycol 400 and glycerol. Addition of polymers had positive influence on the dispersion of hydrogels. The studied gels have thixotropic properties, their viscosity increases with the increase of the concentration of polymers. Increase of the content of polyvinylpyrrolidone K 90 and Carbopol 934 P increases the consistence, gels are more firm and cohesive. Gels with 5 % chitosane, 15% polyvinylpyrrolidone K 90 and Carbopol 934 P in the presence of additives have prolonged half release period of hydrocortisone.

10

THE FORMATION OF HYDROGELS BASED ON CHITOSAN AND ITS WATER-SOLUBLE DERIVATIVES

75%

Il’ina A. V., Shagdarova B. T., Lunkov A. P., Varlamov V. P.

Progress on Chemistry and Application of Chitin and its Derivatives

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2020

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vol. 25

5 - 15

EN

This review considers articles on the formation of hydrogels based on chitosan as well as succinylated and quaternized chitosan derivatives. They are synthesized using low toxicity reagents, under ordinary conditions (low production costs). Chitosan derivatives are soluble in an extended range of pH values and characterized by mucoadhesiveness, bioavailability and biodegradability, which extends the potential of their medical applications. One of the most important properties of chitosan and its derivatives is the ability to form hydrogels. Depending on the nature of the bonds that occur during formation, hydrogels are divided into chemically or physically crosslinked, or a mixture of the two. Chemically crosslinked gels have covalent bonds, while physically crosslinked gels are formed by noncovalent interactions, for example, ionic. Mixed hydrogels have both types of crosslinking.

11

Physicochemical properties and cytotoxicity of hydrogels based on Beetosan® containing sage and bee pollen

75%

Tyliszczak B., Drabczyk A., Kudłacik-Kramarczyk S., Grabowska B., Kędzierska M.

Acta Biochimica Polonica

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2017

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vol. 64

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issue 4

709-712

EN

Currently, increasing attention is being paid to issues related to environmental protection, waste management, as well as to the development of polymers with useful properties. The research presented here involved preparation of hydrogels based on Beetosan® - a chitosan derived from the multi-stage processing of dead bees. Moreover, hydrogels were additionally modified with natural substances - i.e. bee pollen and extract of Salvia officinalis (sage) that are well known for the presence of many compounds with beneficial properties from a medical point of view. Materials have been first obtained by photopolymerization. Then, their surface morphology, wettability and cytotoxicity to selected cell lines have been determined. It can be stated that such combination of Beetosan® hydrogel matrix and the mentioned additives resulted in a preparation of polymers characterized by negative impact on cancer cells. Impact of hydrogels with sage is slightly more intense due to the presence of substances such as ursalic or rosmaric acid that are characterized to have anticancer activity. Such negative impact has not been observed in case of studies using fibroblasts. Furthermore, addition of natural substances into hydrogels resulted in a more homogeneous surface and in the decrease of wettability angle of the tested polymers. It can be concluded that the use of natural-derived reagents and synthesis of polymers using these reagents (as a result of environmentally friendly photopolymerization) yields materials with interesting properties for medical purposes, with particular emphasis on antitumor activity, and without significant negative impact on fibroblasts.

Refine search results

Implantation of superabsorbent polymer by magnetic iron oxide particles

APPLICATION OF CHITOSAN IN THE FORMULATION OF DERMATOLOGICAL HYDROGELS PREPARED ON THE BASIS OF MACROMOLECULAR COMPOUNDS

The use of hydrogel in afforestation of postindustrial areas

Poly(2-acrylamido-2-methyl-1-propane sulfonic acid-co-1-vinyl-2-pyrrolidone) Hydrogel and its use in the Removal of Cd(II), Pb(II) and Cu(II)

THE INFLUENCE OF SELECTED POLYMERS ON THE RHEOLOGICAL PROPERTIES OF HYDROGELS WITH CHITOSAN APPLIED ON THE SKIN

APPLICATION OF CHITOSAN IN THE FORMULATION OF HYDROGELS APPLIED ON SKIN

APPLICATION OF TEXTURE PROFILE ANALYSIS TO INVESTIGATE THE MECHANICAL PROPERTIES OF THERMOSENSITIVE INJECTABLE CHITOSAN HYDROGELS

PVA hydrogel deformation in response to change in temperature or pH

THE INFLUENCE OF SUBSTRATE COMPOSITION ON THE PHYSICOCHEMICAL PROPERTIES OF HYDROGELS WITH CHITOSAN

THE FORMATION OF HYDROGELS BASED ON CHITOSAN AND ITS WATER-SOLUBLE DERIVATIVES

Physicochemical properties and cytotoxicity of hydrogels based on Beetosan® containing sage and bee pollen