Silica/lignosulfonate hybrid materials: Preparation and characterization

Abstract

The research reported here concerns the synthesis, characterization and potential applications of silica/lignosulfonate hybrid materials. Three types of silica were used (Aerosil®200, Syloid®244 and hydrated silica), along with magnesium lignosulfonate. The effectiveness of the hybrid material synthesis methodology was confirmed indirectly, using Fourier transform infrared spectroscopy, elemental and colorimetric analysis. Dispersive-morphological analysis indicates that the products with the best properties were obtained using 10 parts by weight of magnesium lignosulfonate per 100 parts of Syloid®244 silica. The relatively high thermal stability recorded for the majority of the synthesized products indicates the potential use of this kind of a material as a polymer filler. Results indicating the high electrokinetic stability of the materials are also of great importance. Additionally, the very good porous structure properties indicate the potential use of silica/lignosulfonate systems as biosorbents of hazardous metal ions and harmful organic compounds.

Preparation, characterization and the adsorption characteristics of lignin/silica nanocomposites from cellulosic ethanol residue

“…The third stage of the composites mass loss of about 3-10% observed in the range 600-800 C was interpreted as a consequence of the lignin molecules bonded with silica. 25 The similar phenomenon was also found by Klapiszewski et al 39 The mass loss of the third stage increased with the increasing of pH value, which was resulted from improvement of silica content in the nanocomposite. Meanwhile, it was found that the weight values of residues at 900 C were 47% in LS4 and 35% in lignin, indicating that more silica existed in composite, which was consistent with XPS analysis.…”

“…31 P-NMR analysis showed that the hydroxyl groups on the lignin were replaced by the Si-O-LIG ether bond in the composites, and TEM showed that the lignin in the composites were graed onto the nanosized silica surface, and the composites had a large surface area (560 m 2 g À1 ). Klapiszewski et al 25 reported the synthesis, characterization and potential applications of silica/lignosulfonate hybrid materials. Three types of silica were used to optimize silica species.…”

Synthesis of SiO2 nanopowders containing quartz and cristobalite phases from silica sands

“…The as-prepared SiO 2 powders were then characterized by means of X-ray diffractometry (XRD) to investigate the phase formation and crystal structure [23], X-ray fluouresence (XRF) to evaluate the elemental composition [24], fast-Fourrier transform infra-red spectrometry (FT-IR) to study the silica functional groups [25], scanning and transmission electron microscopy (SEM and TEM) to demonstrate the morphological and microstructural properties [7,26], and Brunauer-Emmett-Teller (BET) to determine the surface area [27].…”

Influence of Processing Conditions on the Thermal Stability and Mechanical Properties of PP/Silica-Lignin Composites

“…Currently, it is important for economic and environmental reasons to use natural polymers as organic precursors that are derived from broadly defined biomasses or other sources. Particularly, noteworthy are the systems with silica, which represents a popular, relatively inexpensive inorganic filler or support, and biopolymers, for example, lignin [1][2][3] and its derivatives, including lignosulfonates [4,5].…”