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Methods of preparing a crosslinked fiber membrane

  • US 8,734,567 B2
  • Filed: 04/29/2013
  • Issued: 05/27/2014
  • Est. Priority Date: 08/25/2010
  • Status: Expired due to Fees
First Claim
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1. A method for preparing a crosslinked hollow fiber membrane, the method comprising spinning into a monoesterifed fiber a one phase solution comprising a monoesterified polyimide polymer, acetone as a volatile solvent, a spinning solvent, and a spinning non-solvent, wherein the volatile solvent is present in an amount of greater than 25 wt. % to about 50 wt. %, based on the total weight of the solution;

  • andsubjecting the monoesterified fiber to crosslinking [one of esterfication and transesterification] conditions to prepare a crosslinked hollow fiber membrane.

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