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Publikācija: Novel Functionalized Lignins (Lignocellulose) – Silica Hybrid Materials

Publication Type Conference paper
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Novel Functionalized Lignins (Lignocellulose) – Silica Hybrid Materials
Field of research 1. Natural sciences
Sub-field of research 1.4 Chemical sciences
Authors Gaļina Teliševa
Tatjana Dižbite
Anna Andersone
Dmitry Evtuguin
Ljudmila Belkova
Keywords Lignocellulosics, biomimetic, hybrid materials, silicon, green materials
Abstract The aim of the present work is investigation and characterization of structures of novel functional lignin/silica organic-inorganic hybrid materials (OIHs) synthesized as bio-mimetic Si-containing clay minerals – soil organic matter. These producs are described as supramolecular systems, where guest molecule of Si-loigomer modulates both microsurface and bulk structure of lignin host matrix. As the result, hydrophobic silicon-containing blocks are formed not only on the lignin surface but also in the matrix bulk structure (XPS and TMA data). Novel OIHs were characterized by spectroscopic techniques (29Si and 13C solid state CP/MAS NMR, EPR, FT-IR, XPS), nitrogen gas, normal hydrocarbons and water vapour adsorption/desorption isotherms, sorption tests with potential inorganic (heavy metals) and organic (chlorophenols) pollutants. The data of 29Si CP/MAS NMR spectroscopy show that the silica structures in lignin/silica hybrids are highly, but not completely condensed and Si-OH groups still remain (as it also was shown by FT-IR) opening an opportunity for further adsorption interactions, about 40-60% of silica was incorporated into the lignin materials.
Reference Teliševa, G., Dižbite, T., Andersone, A., Evtuguin, D., Belkova, L. Novel Functionalized Lignins (Lignocellulose) – Silica Hybrid Materials. In: Conference Hybrid Materials 2009, France, Tours, 15-19 March, 2009. Tours: 2009, pp.A2.1.09.-A2.1.09.
ID 5953