1 H NMR spectroscopy study of structural water in rehydrated biocomposite of Spongilla lacustris freshwater demosponge o
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T.C. BIOLOGICAL AND BIOMIMETIC MATERIALS
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H NMR spectroscopy study of structural water in rehydrated biocomposite of Spongilla lacustris freshwater demosponge origin Tatiana Krupska1 · Marcin Wysokowski2,3 · Iaroslav Petrenko3 · Yuliya Khrunyk4,5 · Krzysztof Nowacki6 · Hermann Ehrlich3,7 · Vladimir V. Turov1 Received: 26 April 2020 / Accepted: 23 July 2020 © The Author(s) 2020
Abstract Biocomposites of sponge origin attract scientific attention due to their renewability as well as special properties. Dried skeletons of fresh water demosponge Spongilla lacustris represent unique kind of naturally occurring silica-chitin-based biocomposites with long history of their applications in dermatocosmetics. However, there is still a lack of knowledge on their physico-chemical properties in model systems. The aim of this work was to model drug systems based on S. lacustris powdered biocomposite, water and a hydrophobic medium, which served as an analog of an oil base. Both thermogravimetric analysis and 1H NMR spectroscopy study of structural water in rehydrated biocomposite lead to obtaining of interesting experimental data useful for preparation of biocosmetic products. Keywords Spongilla lacustris · Bio-silica · 1H NMR · Biocosmetics
1 Introduction
* Marcin Wysokowski [email protected] Vladimir V. Turov [email protected] 1
Chuiko Institute of Surface Chemistry of the NAS of Ukraine, General Naumov Str. 17, Kiev 03164, Ukraine
2
Faculty of Chemical Technology, Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60965 Poznan, Poland
3
Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, Gustav‑Zeuner str. 3, 09599 Freiberg, Germany
4
Ural Federal University, Mira Str. 19, 620002 Ekaterinburg, Russia
5
The Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences, Akademicheskaya Str. 20, 620990 Ekaterinburg, Russia
6
Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, ul. Berdychowo 4, 60‑965 Poznan, Poland
7
Center for Advanced Technology, Adam Mickiewicz University, 61614 Poznan, Poland
Sponges (Porifera) represent an ancient and unique phylum of the first multicellular organisms to have inhabited our planet. They have survived since Precambrian due to the ability to synthetize a broad diversity of secondary metabolites with cytotoxic and antibiotic-like activities as well as the formation of robust skeletal structures made of biosilica and calcium carbonates (see for review [1, 2]). Siliceous spicules remain to be one of the typical skeletal formations found in diverse sponges, which belong to the Demospongiae class. They function as mechanical support for organic matrix as well as due to very sharp apical ends can protect the sponge body from predators (i.e., fish, turtles, etc.). Intriguingly, the presence of sharp up to 300 µm-long spicules contributed to the use of fresh water sponges such as Spongilla lacustris in the tradit
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