Investigating the Effects of Nonsolvent Additive and Spinning Conditions on Morphology and Permeation of PAN Hollow Fiber Membranes

Table 2

Composition and the spinning conditions of the fabricated hollow fiber PAN membranes. Spinneret OD/ID (mm), 1.2/0.6; polymer concentration, 18 wt%; PVP concentration, 4 wt% of total polymer solution weight; dope/bore flow rate, 1.5; coagulant, tap water.

No.	Membrane code	Dope composition NMP/H2O (wt%/wt%)	Bore fluid composition NMP/H2O (, %)	Dope flow rate (ml)	Air gap distance (cm)	Coagulation bath temperature	Take-up status
1	W0	82/0	90/10	6	2	28	Free fall
2	W2	80/2	90/10	6	2	28	Free fall
3	W3.5	78.5/3.5	90/10	6	2	28	Free fall
4	W6	76/6	90/10	6	2	28	Free fall
5	B0	82/0	0/100	4	2	28	Free fall
6	B90	82/0	90/10	4	2	28	Free fall
7	D4	78.5/3.5	90/10	4	2	28	Free fall
8	D6	78.5/3.5	90/10	6	2	28	Free fall
9	A5	78.5/3.5	90/10	6	5	28	Free fall
10	A7	78.5/3.5	90/10	6	7	28	Free fall
11	A9	78.5/3.5	90/10	6	9	28	Free fall
12	C22	78.5/3.5	90/10	6	5	22	Free fall
13	C28	78.5/3.5	90/10	6	5	28	Free fall
14	T0	78.5/3.5	90/10	6	2	28	Free fall
15	T10	78.5/3.5	90/10	6	2	28	10% stretch
16	T20	78.5/3.5	90/10	6	2	28	20% stretch