Synthesis of Electrospun Polyvinyl Butyral/Bentonite Nanofiber Film for Cationic Dye Removal

Table 3

The contact angle of PVB/bentonite nanofibers versus the operating time.

Time (minute)	Contact angle
0	109.2
15	100.4
30	90.6
45	75.5
60	50.7
75	38.7
90	0