Page 112 - Gas Wettability of Reservoir Rock Surfaces with Porous Media
P. 112
96 Gas Wettability of Reservoir Rock Surfaces with Porous Media
250,000 200,000
F1s 150,000 F1s
optoelectronic strength/CPS 150,000 O1s optoelectronic strength/CPS 100,000 O1s N1s C1s
200,000
100,000
50,000
50,000
0 C1s 0
1400 1200 1000 800 600 400 200 0
1400 1200 1000 800 600 400 200 0
Combined line/eV
Combined line/eV
(A) (B)
FIGURE 3.2
XPS analysis of fluorinated acrylate polymer (A) F06-AA, (B) F06-AA-DA.
2.5
2.0
Absorptivity 1.5
1.0
0.5
0.0
240 260 280 300 320
Wave length/nm
FIGURE 3.3
Ultraviolet visible absorption spectra of F06-AA-DA.
from amine hydrochloride. Thus, the result of XPS illustrates that dopamine has
accessed fluorinated acrylate polymer, and is consistent with infrared analysis.
3.2.1.2.3 Analysis of Ultraviolet-visible Spectrum (UV-vis)
Fluorinated acrylate polymer was dissolved in N,N- DMF to prepare a solution
with certain concentration. It was tested at room temperature with scanning
range of 250B310 nm, and scanning speed of 440 nm/min. The experimental
result is shown in Fig. 3.3.
It can be seen from uv-visible spectroscopy (Fig. 3.3) that F06-AA-DA exhibits
an absorption peak at 284 nm. It shows that the polymer contains catechol
functional groups, indicating that dopamine is introduced in the polymer.
