The present disclosure relates to hydrophilic microporous membranes comprising a modified surface. In addition, the present disclosure relates to a process for producing such hydrophilic membranes by modification of microporous membranes with fluorinated organosilane compounds and electron beam irradiation.

The present disclosure relates to hydrophilic microporous membranes comprising a modified surface. In addition, the present disclosure relates to a process for producing such hydrophilic membranes by modification of microporous membranes with fluorinated organosilane compounds and electron beam irradiation.

Organic solvent nanofiltration membranes that include at least one polymer coated expanded polyparaxylylene (eP-PX) membrane are provided. A substrate/support layer may be positioned on one side of the ePPX membrane. In some embodiments, the substrate/support layer is sandwiched between ePPX membranes. Processes for manufacturing and using such organic solvent nanofiltration membranes are also provided. The organic solvent nanofiltration membranes are capable of separating and/or concentrating solutes from a solution comprising a lower molecular weight organic solvent with high permeability. The polymer coated ePPX membranes may also be resistant to chemical attack, resistant to gamma radiation, thermally stable, biocompatible, and strong.

The present invention generally relates to polymeric membrane materials formed, at least in part, from monomeric material selected from 2,3,3,3-tetrafluoropropene (CF.sub.3CF=CH.sub.2, HF0-1234y0 or trans-1,3,3,3-tetrafluoropropene (CF.sub.3CH=CFH, HFO-1234ze), and to membrane preparations and uses thereof in water desalination, filtration, membrane distillation, pervaporation, and selective gas separation.

The present invention generally relates to polymeric membrane materials formed, at least in part, from monomeric material selected from 2,3,3,3-tetrafluoropropene (CF.sub.3CF=CH.sub.2, HF0-1234y0 or trans-1,3,3,3-tetrafluoropropene (CF.sub.3CH=CFH, HFO-1234ze), and to membrane preparations and uses thereof in water desalination, filtration, membrane distillation, pervaporation, and selective gas separation.

Described herein are amorphous fluorinated copolymers produced by the polymerization of one or more fluorinated ring monomers and one or more fluorinated comonomers containing multiple ether oxygens. The copolymers are suitable in many high-technology applications, such as optical fibers, anti-reflection coatings, protective coatings, and gas separation membranes. In one aspect, the copolymers are useful is in the field of membrane-based gas separation processes. In one aspect, amorphous copolymer is produced by polymerizing (a) one or more fluorinated ring monomers in the amount of 1 mol % to 99.5 mol %, wherein the fluorinated ring monomer is at least a five membered ring and (b) a comonomer in the amount of from 0.5 mol % to 99 mol %, wherein the comonomer comprises a fluorinated compound with two or more ether oxygens.

Described herein are amorphous fluorinated copolymers produced by the polymerization of one or more fluorinated ring monomers and one or more fluorinated comonomers containing multiple ether oxygens. The copolymers are suitable in many high-technology applications, such as optical fibers, anti-reflection coatings, protective coatings, and gas separation membranes. In one aspect, the copolymers are useful is in the field of membrane-based gas separation processes. In one aspect, amorphous copolymer is produced by polymerizing (a) one or more fluorinated ring monomers in the amount of 1 mol % to 99.5 mol %, wherein the fluorinated ring monomer is at least a five membered ring and (b) a comonomer in the amount of from 0.5 mol % to 99 mol %, wherein the comonomer comprises a fluorinated compound with two or more ether oxygens.

The disclosure provides an improved process for preparing oleophobic fluoropolymers. The resulting fluropolymers were found to be effective in imparting hydrophobic and oleophobic properties to porous polymeric membranes such as PTFE. The treated PTFE membrane can reach an oleophobic level of 6 or above, (according to the AATCC-118-1997 oil repellency test method) with a low air flux loss.

The present invention relates to new anion exchange polymers and (blend) membranes made from polymers containing highly fluorinated aromatic groups by means of nucleophilic substitution and processes for their production by means of nucleophilic aromatic substitution and their areas of application in membrane processes, in particular in electrochemical membrane processes such as fuel cells, electrolysis and redox flow batteries.

The present invention relates to new anion exchange polymers and (blend) membranes made from polymers containing highly fluorinated aromatic groups by means of nucleophilic substitution and processes for their production by means of nucleophilic aromatic substitution and their areas of application in membrane processes, in particular in electrochemical membrane processes such as fuel cells, electrolysis and redox flow batteries.