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

Table 10

Nonlinear correlation analysis of surfactant functional groups and wettability.

Factor	Fitting formula	R^2
Carbonyl carbon	Y = 33.01 + 6.26x − 0.52x^2	0.51910
Protonated carbon	Y = 46.05–25.44x + 4.58x^2	0.98663
Aliphatic methyl/arylmethyl	Y = −227.25 + 138.17x − 17.17x^2	0.99868
Quaternary carbon/methylene	Y = 84.47 – 2.6x + 0.03x^2	0.46883
Oxygen-linked aliphatic carbon	Y = −33.41 + 3.9x − 0.04x^2	0.71263