Interactions between Talc Particles and Water and Organic Solvents

A New Interpretation of Contact Angle Variations in View of a Recent Analysis of Immersion Calorimetry

“…The term k depends on the liquid used in the immersion experiment and can be taken as 2.5 for alkanes (30,31). Hence, another method is available besides contact angle measurements to discuss the link between the cosine of the angle and the two parameters π e and γ SL .…”

“…It indicates whether the solid is of high or low energy, and of course, this value depends both on the chemical species involved and on the bond structure. It has been recently shown (31) that the tension value is linked to the crystallinity (i.e., the ratio between crystalline and amorphous parts of the solid) and to the crystal shape (lamellarity, grinding, etc.). This is in agreement with the fact that solids presenting contact angles with usual liquids are generally polymers, i.e., both organic and amorphous materials.…”

Measurement of Surface Area of Modified Clays by Ethylene Glycol Monoethyl Ether Method

“…Talc and pyrophylite are examples of clay minerals with dominant neutral siloxane surface and are hydrophobic. The neutral siloxane surface will hardly interact with polar molecules such as water given that it is non-polar [6,7]. Unlike the neutral siloxane surface that has a very low affinity for polar molecules, non polar organic molecules can interact with the neutral siloxane surface.…”

Fire-retardant and fire-barrier poly(vinyl acetate) composites for sealant application

“…An initial difference between the modulus of the kaolin and talc series was observed, with the kaolin series generally higher than the modulus of the talc series. This was due to the different particle structure and interaction between PVAc and talc [33,34] than between kaolin and PVAc. After burning the composites at 400 and 1050°C, the phases underwent structural transformations.…”