Mercury
Mercury
Mercury
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3) the size of molecules<br />
• Small-sized surface active agents have better<br />
wettability and permeability;<br />
• Large-sized agents have better ablution ( 洗 涤<br />
作 用 ) and dispersant effect ( 分 散 作 用 ).<br />
e.g. the order of the ablution effectiveness of<br />
alkyl sodium sulfate surface active agent is as<br />
follows:<br />
C 16 H 33 SO 4 Na> C 14 H 29 SO 4 Na> C 12 H 25 SO 4 Na<br />
• Concerning wettability, it appears the<br />
opposite.