hydrogel

 The study is devoted to the development and evaluation of alginate hydrogel plates modified with tea tree and rosemary essential oils as a potential wound treatment material. The introduction of these oils into the hydrogel has led to a significant increase in the antibacterial properties of the hydrogel, making it effective against pathogens. Importantly, the inclusion of essential oils does not impair the physical, mechanical, and operational characteristics of hydrogel plates.

A series of gelatin-based hydrogels was prepared, and the effects of different crosslinking agents and agar content were studied in detail. Results indicate that borax and glutaraldehyde are good crosslinking agents. Moreover, all samples were described with a hindered Fickian water diffusion, making it an interesting choice for medical applications.

The features of forming macroporous hydrogel foam during the foaming of aqueous sodium alginate solutions with simultaneous cross-linking of sodium alginate macromolecules by calcium ions are considered. Foaming is achieved through the release of carbon dioxide from the hydrogel composition due to the interaction of carbonates with carboxyl groups. The study outlines the most significant factors influencing the formation process of macroporous hydrogel foam.

Developing a new generation of transparent hydrogel firefighting mineral-polymeric materials is an urgent task. These composites are used to produce refractory glass structures, particularly double-glazed windows. These double-glazed windows are multilayer structures made of silicate glass sheets, with gaps filled by a transparent material that turns opaque under flame exposure, reducing heat load and maintaining structural integrity for a specified duration.

The initiating ability of finely dispersed bimetallic particles in the polymerization reaction of 2-hydroxyethyl methacrylate in polyvinylpyrrolidone presence is proven. The bimetal formation on the surface of ferrum particles was confirmed by the X-ray spectroscopic microanalysis results. The regularities of block polymerization of such compositions have been studied. The effect of metals nature, monomer and polyvinylpyrrolidone ratio, as well as the temperature on polymerization kinetics and "limit" monomer conversion was determined.

The article presents the results of a study of the influence of the molecular weight of polyvinylpyrrolidone on the properties of two-layer hydrogel/polycaproamide membranes. Composite membranes are obtained by the developed method, which consists in the formation of hydrogel membranes with subsequent deposition from a solution into their outer surface of a reinforcing layer based on polyamide modified with polyvinylpyrrolidone.

The report describes the features of physical and mechanical properties and absorption capacity of hydrogels based on highly esterified pectin. Experimental data showed the correlation between these values. Also, an attempt is made to explain the obtained dependencies via the hydrogel morphology and the mechanism of its formation.

Organic-inorganic hydrophilic composites based on sodium polyacrylate (PAANa) and poly-N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (PAPTMS) showed the improved swelling capacity at incorporation of PAPTMS. Changing of non-Fickian to Super case II swelling behaviour is observed at 20 wt % PAPTMS content. Enhancing of thermal stability and heat-resistance index of composite hydrogels compared to PAA is shown.

The paper presents the results of the study of copolymerization of 2-hydroxyethylmethacrylate (HEMA) with polyvinylpyrrolidone (PVP) under the action of two-component initiation systems of iron (II) sulfate/radical type initiator. The influence of the nature of the radical initiator (In) in the FeSO4/In system on the behavior of the polymerization of HEMA/PVP compositions, structural parameters of the polymer matrix network and properties of hydrogels based on pHEMA-gr-PVP copolymers were established.