sahar abbasi geravand

Nanomicrobial cellulose is an important biopolymer with a three-dimensional structure that is produced by some microorganisms and has been widely used in medicine. One of the unique properties of microbial cellulose is its very high water absorption, which can be used to produce modern wound dressings. But after drying, it’s three-dimensional structure collapses and the amount of water reabsorption decreases. Accordingly, the aim of this project was to preserve the three-dimensional structure of nanomicrobial cellulose by networking it and improving the water reabsorption properties of this biopolymer. In addition, the cell viability, proliferation, and cell growth of the modified structure and untreated microbial cellulose were also studied.

In this study, microbial cellulose was produced, purified, and neutralized using stationary culture. The samples were then treated with different concentrations of citric acid/sodium hypophosphite and crosslinked. Finally, the characteristics of treated and raw samples were studied by various tests including ATR-FTIR, MTT, SEM, water absorption and in vitro and in vitro tests.

According to the results, it was found that the cross-linking operation prevents the collapse of the structure and not only does not cause toxicity, but in addition to increasing water uptake, it also increases viability, adhesion, and cell proliferation in the modified cellulose.

Cross-linked nanomicrobial cellulose has high potential as a modern wound dressing.

In this study, stable lattices of terpolymer butyl acrylate, methyl methacrylate, and styrene were synthesized by a mini-emulsion polymerization technique using tert-butyl hydroperoxide TBHP/Fe2 /ethylenediaminetetraacetic acid/sodium formaldehyde sulfoxylate redox initiators at room temperature, and the kinetics of the reaction were studied. The reaction rate was obtained from periodic sampling. The chemical compositions of the samples were identified by FTIR. The distribution index of some polymers and their distribution were determined by gel permeation chromatography. The size distribution of the polymers in the lattices was obtained by dynamic light scattering. From the results of the DSC test, it was deduced that copolymerization produces a structure of special blocks and that this particular terpolymer has two glass-transition temperatures.