Improving Anti-Protein-Fouling Property of Polyacrylonitrile Ultrafiltration Membrane by Grafting Sulfobetaine Zwitterions

Table 2

The date of XPS of PAN-350 membrane.

	C	O	N	S
PAN-350	76.85	8.6	14.55	0
Hydrolyzed PAN-350	75.66	11.03	13.32	0
PAN-350-M1	74.36	11.61	13.57	0.46
PAN-350-M2	74.24	11.89	13.41	0.47
PAN-350-M3	72.98	11.79	14.72	0.52