Experimental Study for Influence of Surfactants Chemical Microstructures on Wetting Effect about Coal Dust in Tongchuan Mining Area

Table 7

Linear correlation analysis of wettability and surfactant functional group parameters.

		Contact angle	Aliphatic hydrocarbon	Aromatic hydrocarbon	C-O-	C=O	Ether group	-OH	-COO	Aliphatic amine	Aromatic amine
Contact angle	Pearson correlation	1	0.903	0.473	0.699	0.081	0.332	−0.989	0.443	0.856	0.409
	Sig. (2-tailed)		0.097	0.527	0.507	0.948	0.785	0.011	0.557	0.144	0.591
	N	4	4	4	3	3	3	4	4	4	4