Title
Phyllosilicate-based functional nanocomposites
Code
SP2018/95
Summary
Research activities within the framework of the project will be divided into three areas.
1) Preparation and characterization of polypyrrole/phyllosilicate nanocomposite thin films on glass and polymeric substrate.
Since the polyaniline-based thin films of this type exhibits higher electrical conductivity in comparison with pure polyaniline[Kulhánková et al. Thin Solid Films 562 (2014) 319], similar effect in the case of the polypyrrole can be expected. Higher electrical conductivity of polypyrrole in comparison with polyaniline [L. Dai, Intelligent macromolecules for smart devices, Springer, London (2004), pp. 41-80.] is another important fact which, while maintaining the same trend, can lead to thin layers with significantly higher conductivity than polyaniline/montmorillonite nanocomposite layers. Therefore, after successful mastering the method of preparation of pure polypyrrole thin layers (project SGS 2017/65) the research will be focused on preparation of polypyrrole/phyllosilicate nanocomposite thin films.
2) Preparation and characterization of photoactive nanocomposites containing ZnS nanoparticles on phyllosilicate matrix.
After successful mastering the method of preparation of pure photoactive ZnS (project SGS 2017/65) the research will be focused on synthesis of the ZnS in water suspension of phyllosilicate so the resulting nanoparticles are anchored on the surface of phyllosilicate particles. Similarly to nanocomposites containing ZnO nanoparticles [Mamulová Kutláková et al. Appl. Catal. B 162 (2015) 392], an increase in photoactivity of ZnS when prepared as an integral part of the ZnS/phyllosilicate nanocomposite can be expected.
3) Study of stability of structure and electrical conductivity of polypyrrole/phyllosilicate nanocomposites in long-term time horzon (in range of several months).
Structural and functional characteristics of nanocomposite materials, as can be found in a literature, are almost always based on analyzes of freshly prepared samples. It is the result of an understandable effort to register the properties of the sample as soon as possible after its preparation because such obtained values are most readily reproducible and allow verification of the correctness of the preparation process. Monitoring the long-term changes in these values (i.e., the values measured immediately after the sample preparation) represents a further step in material research, especially with regard to potential use of the material in practical applications. This research in the field of polypyrrole/phyllosilicate nanocomposites builds on preliminary research that has been focused on monitoring the stability of pure polyaniline thin layers [Peikertová et al. Chem. Pap. 71 (2017) 379]. It can be assumed that monitoring of structural changes and changes in electrical conductivity will provide information on the stability of the nanocomposites compared to pure polypyrrole. On the basis of previous observations, the electrical conductivity of polypyrrole/phyllosilicate nanocomposites starts to decrease after a certain period of time. The purpose of monitoring is to determine whether a long-term stable electrical conductivity value will be achieved, and if so, for how long after the preparation.
Start year
2018
End year
2018
Provider
Ministry of Education, Youth and Sports
Category
SGS
Type
Specifický výzkum VŠB-TUO