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Si2p XPS spectra of the raw coal and the coal adsorbed dispersant.
| Yulin coal |
Yili coal |
|||
|---|---|---|---|---|
| area (cps eV) | thickness (nm) | area (cps eV) | thickness (nm) | |
| raw | 1382.5 | — | 2302.8 | — |
| NSF | 1154.3 | 0.76 | 2033.9 | 0.52 |
| PSS | 1040.2 | 1.19 | 1976.8 | 0.64 |
| P(SS-co-AA-co-DMDAAC) | 837.2 | 2.11 | 1489.3 | 1.83 |
