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

Table 5

Percentages of different carbon types in ¹³C-NMR spectra of the surfactants.

No.
1	6.90	—	6.90	1.51	5.39	1.51	—	93.10	4.76	19.98	68.36
2	8.93	8.93	—	—	—	—	—	91.07	4.43	61.22	25.42
3	2.27	2.27	—	—	—	—	—	97.73	3.42	31.49	62.82
4	33.54	—	33.54	29.06	4.48	—	29.06	66.46	5.27	41.62	19.57