Composite Hydrogels Based on Bacterial Cellulose and Poly-1-vinyl-1,2,4-triazole/Phosphoric Acid: Supramolecular Structure as Studied by Small Angle Scattering
Ruslan Y. Smyslov,
Artem I. Emel’yanov,
Ksenia V. Ezdakova,
Svetlana A. Korzhova,
Yulia E. Gorshkova,
Albert K. Khripunov,
Alexandra V. Migunova,
Natalia V. Tsvigun,
Galina F. Prozorova,
Varvara O. Veselova,
Gennady P. Kopitsa,
Lijun Lu,
Yanchao Mao,
Alexander S. Pozdnyakov
Affiliations
Ruslan Y. Smyslov
Institute of Macromolecular Compounds RAS, NRC KI, 199004 Saint Petersburg, Russia
Artem I. Emel’yanov
A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 664033 Irkutsk, Russia
Ksenia V. Ezdakova
Petersburg Nuclear Physics Institute NRC KI, 188300 Gatchina, Russia
Svetlana A. Korzhova
A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 664033 Irkutsk, Russia
Yulia E. Gorshkova
Joint Institute for Nuclear Research, 141980 Dubna, Russia
Albert K. Khripunov
Institute of Macromolecular Compounds RAS, NRC KI, 199004 Saint Petersburg, Russia
Alexandra V. Migunova
Department of Microbiology, Biological Faculty, Saint Petersburg State University, 199178 Saint-Petersburg, Russia
Natalia V. Tsvigun
Federal Scientific Research Centre “Crystallography and Photonics” of the Russian Academy of Sciences, 111933 Moscow, Russia
Galina F. Prozorova
A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 664033 Irkutsk, Russia
Varvara O. Veselova
Kurnakov Institute of General and Inorganic Chemistry RAS, 119991 Moscow, Russia
Gennady P. Kopitsa
Petersburg Nuclear Physics Institute NRC KI, 188300 Gatchina, Russia
Lijun Lu
Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
Yanchao Mao
Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
Alexander S. Pozdnyakov
A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 664033 Irkutsk, Russia
New composite hydrogels (CH) based on bacterial cellulose (BC) and poly-1-vinyl-1,2,4-triazole (PVT) doped with orthophosphoric acid (oPA), presenting interpenetrating polymeric networks (IPN), have been synthesized. The mesoscopic study of the supramolecular structure (SMS) of both native cellulose, produced by the strain Komagataeibacter rhaeticus, and the CH based on BC and containing PVT/oPA complex were carried out in a wide range of momentum transfer using ultra- and classical small-angle neutron scattering techniques. The two SMS hierarchical levels were revealed from 1.6 nm to 2.5 μm for the objects under investigation. In addition, it was shown that the native BC had a correlation peak on the small-angle scattering curves at 0.00124 Å−1, with the correlation length ξ being equal to ca. 510 nm. This motive was also retained in the IPN. The data obtained allowed the estimation of the fractal dimensions and ranges of self-similarity and gave new information about the BC mesostructure and its CH. Furthermore, we revealed them to be in coincidence with Brown’s BC model, which was earlier supported by Fink’s results.
