Ultrathin Sicopion Composite Cation-Exchange Membranes: Characteristics and Electrodialytic Performance following a Conditioning Procedure

Table 2

Dimensional variation coefficients (in the 𝑋 and 𝑌 dimensions) from a dry-to-wet membrane (Cs_𝑥, Cs_𝑦), after an acid bath (Ca_𝑥, Ca_𝑦) and after an alkaline bath (Cb_𝑥, Cb_𝑦).

CEM membrane	Dry to wet		Acid bath		Alkaline bath
(of diluate compartment)	Cs𝑥,	Cs𝑦	Ca𝑥,	Ca𝑦	Cb𝑥,	Cb𝑦
Sicopion 16.7 % SFSP	0.0018±0.0016	0.0000±0.0000	0.0031±0.0008	0.0018±0.0022	0.0031±0.0008	0.0018±0.0022
Sicopion 25.0 % SFSP	0.0000±0.0000	0.0000±0.0000	0.0031±0.0008	0.0007±0.0014	0.0038±0.0013	0.0007±0.0014
Sicopion 35.0 % SFSP	0.0009±0.0016	0.0000±0.0000	0.0014±0.0016	0.0007±0.0014	0.0014±0.0016	0.0007±0.0014
CMX-SB	n/a	n/a	0.0029±0.0005	0.0023±0.0027	0.0029±0.0005	0.0013±0.0027