Herein, the results of a study focused on graphene in activation and cross-linking reactions with hydrazine are reported. The method provides an approach to the preparation of graphene-based materials, in this case, with a preset distance between individual layer and a relatively low ratio between the Raman [Formula: see text] and [Formula: see text] bands — [Formula: see text] peak intensity/[Formula: see text] peak intensity ([Formula: see text]/[Formula: see text]), ca. 1.81 (for unmodified High Strength Metallurgical Graphene[Formula: see text] (HSMG[Formula: see text] [Trade mark number: 013391669; Office for Harmonization in the Internal Market]), this ratio is 0.16). A 3D structure was created without a substrate (e.g. Si, SiO2 or polymer). This method allows for the preparation of a 3D graphene structure without the [Formula: see text]–[Formula: see text] interactions between individual layers.

No abstract

This study deals with the change of selected properties of samples of modified carboxymethyl cellulose after freeze drying. The investigated properties were changes in thickness, permeability, water sorption, thermal area resistance and thermal absorbing capacity. The prepared materials were evaluated by scanning electron microscopy. The product of presented technology has large internal surface, high wettability and biodegradability. It is nontoxic with high potential in biological applications.

No abstract

The preparation of films containing silver nanoparticles and vitamin C in the polymer matrix is presented in this work. Such films are capable of absorbing excessive amounts of water. In this case, -COOH groups in the CMC and ascorbic acid function as the reducing agents. The films prepared with silver nanoparticles and vitamins C are investigated by using the scanning electron microscope. Samples are also evaluated for their antioxidant and antimicrobial activity. The product of the presented technology is non-toxic with a high potential in biological applications.