Fluoroalkylsilane versus Alkylsilane as Hydrophobic Agents for Silica and Silicates

Figure 5

SEM images of unmodified magnesium silicate (a) and MgO·SiO₂ modified with 5 weight parts by mass of OPF (b), ODS (c), and OCS (d).

(a)

(b)

(c)

(d)