A Comparative Study on the Flocculation of Silica and China Clay with Chitosan and Synthetic Polyelectrolytes

Flocculation is still one of the most important and efficient processes for water treatment. However, most industrial processes, such as in water treatment plants, still use huge amounts of synthetic polyelectrolytes for the flocculation process. Here we compare the flocculation of two different suspended particles, i.e., silica particles and china clay, with the biopolymer chitosan and two common strong synthetic polyelectrolytes. As a flocculant, chitosan featured a minimum uptake rate of 0.05 mg/g for silica and 1.8 mg/g for china clay. Polydiallyldimethylammonium chloride (PDADMAC) for comparison possessed a minimum uptake rate of 0.05 mg/g for silica and 2.2 mg/g for china clay. Chitosan as an environmentally friendly biopolymer competes with the synthetic polyelectrolytes and thus represents a beneficial economic alternative to synthetic flocculants.

Oleophobic Composite Films Based on Multi-Layer Graphitic Scaffolding

A new oleophobic composite material was synthesised utilising multi-layered graphitic (MLG) material as scaffolding is presented herein. The composite consisted of a polyelectrolyte/fluorosurfactant complex derived from polydiallyldimethylammonium chloride (PDDA) and...

SYNTHESIS AND STRUCTURE OF ARTIFICIAL ADJUVANT FOR PREPARATION OF SYNTHETIC VACCINES

The aim of the research was to develop a new approach to designing a new structure in creating synthetic vaccines. We succeeded in synthesizing a polyelectrolyte adjuvant. As a starting material, we used polydiallyldimethylammonium chloride modified with halogen hydrate-ions. The pre-clinical tests carried out on laboratory animals demonstrated no deviations in their physiological and toxicological parameters.