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Water Controversy Using De-Ionized Water (DI) Water

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Water Controversy Using De-Ionized Water (DI) Water
dried at 110 °C for 24 h proceed using De-ionized (DI) water (18MU, Model: D4521, Barnstead International, Dubuque, IA) that was added as a non-solvent into the fiber dope. Besides , N-Methyl-2-pyrrolidone (NMP) (Reagent Plus, 99%, Sigma-Aldrich, Milwuakee, WI) was used as the solvent to form the spinning dope . That could attribuited to its strong solvent power, low volatility and good water miscibility. Therefore , all solvents and nonsolvents were used as-received with no purification or modification. The liquid chemicals were reagent grade with 99% purity and purchased from Sigma Aldrich (Milwaukee, WI). Methanol (ACS grade, VWR) and hexane (ACS Reagent, >98.5%, VWR) were used for solvent exchange after fiber catalyst spinning.Besides,
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