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Table 4 Advancing (ACA) and receding contact angles (RCA) of water, apparent surface free energy and the specific surface area (SSA)

From: Modified silicas with different structure of grafted methylphenylsiloxane layer

No. Scheme of modification Advancing contact angle θ a (deg.) Receding contact angle θ a (deg.) Apparent surface free energy γ S (mJ/m2) SSA (BET) aCarbon content (CNH). wt % Carbon content (XPS). wt %
Protocol 1 (modifying mixture portion on tree stages—25/35/40 vol%)
1 L-S 134 130 10 126 8.9 10.5
2 M 121 109 15 118 9.1 11.2
3 S-L 109 94 21 133 7.5 8.9
Protocol 2 1 (modifying mixture portion on tree stages—40/35/25 vol%)
4 S-L 125 118 14 154 9.6 11.2
5 M 131 120 11 139 9.2 10.9
6 L-S 146 136 5 146 9.3 11.0
  1. aCarbon content evaluated using CNH-analysis