Optimization of Deacetylation Process for Regenerated Cellulose Hollow Fiber Membranes

Table 3

Utilities and averaged importance scores for different factors.

Factors and levels	Utility estimate	Averaged importance score (%)
Swelling time
No swelling	−0.889	31.94
Swelling for 1 h	−0.667
Swelling for 24 h	1.556
Concentration
0.05 M	0.222	14.76
0.075 M	0.333
0.1 M	−0.556
Solution
50% ethanol	−1.500	34.36
96% ethanol	1.500
Reaction time
0.5 h	0	18.94
2 h	0.111
4 h	−0.111
(Constant)	5.500