Where ppm Quantities of Silsesquioxanes Make a Difference—Silanes and Cage Siloxanes as TiO2 Dispersants and Stabilizers for Pigmented Epoxy Resins

Where ppm Quantities of Silsesquioxanes Make a Difference—Silanes and Cage Siloxanes as TiO2 Dispersants and Stabilizers for Pigmented Epoxy Resins

In this work, silsesquioxane and spherosilicate compounds were assessed as novel organosilicon coupling agents for surface modification of TiO2 in a green process, and compared with their conventional silane counterparts. The surface-treated TiO2 particles were then applied in preparation of epoxy (...

Full description

Saved in:
Bibliographic Details
Published in:Materials 2022-01, Vol.15 (2), p.494
Main Authors: Brząkalski, Dariusz, Przekop, Robert E., Frydrych, Miłosz, Pakuła, Daria, Dobrosielska, Marta, Sztorch, Bogna, Marciniec, Bogdan
Format: Article
Language:eng
Subjects:
Additives
cage siloxane
composite
Contact angle
Coupling (molecular)
Coupling agents
Dielectric properties
Dispersants
Epoxy resins
Nanocomposites
Nanoparticles
NMR
Nuclear magnetic resonance
Organosilicon compounds
Pigments
Polymers
POSS
silane
Silanes
Siloxanes
silsesquioxane
spherosilicate
Stability
Stabilizers (agents)
Surface treatment
Thermodynamic properties
Titanium
Titanium dioxide
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this work, silsesquioxane and spherosilicate compounds were assessed as novel organosilicon coupling agents for surface modification of TiO2 in a green process, and compared with their conventional silane counterparts. The surface-treated TiO2 particles were then applied in preparation of epoxy (EP) composites and the aspects of pigment dispersion, suspension stability, hiding power, as well as the composite mechanical and thermal properties were discussed. The studied compounds loading was between 0.005–0.015% (50–150 ppm) in respect to the bulk composite mass and resulted in increase of suspension stability and hiding power by over an order of magnitude. It was found that these compounds may be an effective alternative for silane coupling agents, yet due to their low cost and simplicity of production and manipulation, silanes and siloxanes are still the most straight-forward options available. Nonetheless, the obtained findings might encourage tuning of silsesquioxane compounds structure and probably process itself if implementation of these novel organosilicon compounds as surface treatment agents is sought for special applications, e.g., high performance coating systems.
ISSN:1996-1944
1996-1944