Of great scientific and practical interest is synthetic polyampholytes capable of existing in various conformational and phase states, depending on changes in temperature, pH of the medium, type and concentration of low molecular weight salt, thermodynamic quality of the solvent. Representatives of fully charged macromolecules - highly charged polyampholytes consist of charged cationic and anionic monomers and have the ability to retain charges over a wide range of pH values. The behavior of highly charged polyampholytes depends on the composition of the copolymers and the distribution of monomer units. The presence of permanent charges contributes to the effective binding of metal ions, dyes and surfactants. Copolymers of sodium salt of 2-acrylamido-2-methylpropanesulfonate (AMPSNa) and (3-acrylamidopropyl)trimethylammonium (APTAC) are typical representatives of highly charged polyampholytes, which belong to less studied polymers. Recent studies show that the use of AMPSNa and APTACH as monomers makes it possible to synthesize polymer matrices with unique properties. The significance of studies on polymers based on AMPSNa and APTAC is evidenced by a number of studies devoted to nanocomposite materials. A review of the literature data shows that studies on the complexation of highly charged polyampholytes with metal ions, especially the preparation of multilayer catalytic films by the LbL method, have not been studied enough and publications are episodic. Thus, despite a wide range of polyelectrolytes, not all potentially applicable polymers for the production of LbL are used to obtain multilayer nanocatalysts.
Objective of the project
The aim of this project is to develop multilayer polymer-metal nanocomposites by layer-by-layer assembly of functional polymers for their application in catalysis.
The expected results of the project are
It is expected that the obtained fundamental results will contribute to the development of methods for obtaining active, selective and reusable catalysts from highly charged polyampholytes as a matrix, in particular from PAPTAC and PAMPSNa in complex with transition metals. Given that the LbL design method does not require expensive equipment, reagents, and technological chains, this method can be considered easily commercialized. In addition, the LbL method is easily implemented in mini samples. The main results of the study will be in demand in the creation of such polymer-metal composites for catalysis and will be used to develop fundamental provisions that determine the use of highly charged polyelectrolytes as a matrix for catalysts. The results obtained contribute to the introduction of innovative products to the market of Kazakhstan.
For the first time, based on highly charged polymers PAPTAC and PAMPS in combination with PEI-CuNPs and PEI-PdNPs, the possibility of constructing a multilayer film by the LbL method for catalysis was studied..
Names and surnames of the study group members with their identifiers
- Selenova Bagadat Samatovna - Scientific adviser
- Nauryzova Saule Zinagievna - Performer
- Kuanyshbekov Tilek Kuanyshbekuly - Performer
- Aryp Kadiran - Performer
List of publications
Selenova B.S., Ayazbayeva A.Ye., Shakhvorostov А.V., Kabdrakhmanova S.K., Nauryzova S.Z., Kudaibergenov S.E. Preparation and study of the physicochemical characteristics of multilayer polymer composites based on poly(ethyleneimine)-stabilized copper nanoparticles and poly(sodium 2-acrylamide-2-methyl-1-propanesulfonate) (2021) Chem Bull of Kaz Nat Univ 2021, Issue 3. – P.22-31