Direct fluorination—Useful tool to enhance commercial properties of polymer articles

Hydrophobin as a Nanolayer Primer That Enables the Fluorinated Coating of Poorly Reactive Polymer Surfaces

“…Alternative approaches, such as chemical grafting of fl uoropolymers by radical methods through irradiation, [ 6−8 ] plasma, [ 9−12 ] or direct fl uorination with fl uorine gas, [ 1,2,13 ] require only moderate amounts of fl uorinated surface modifi ers but are much more aggressive and, in some cases, potentially hazardous.Other possibilities involve functionalization with fl uorinated molecules/ polymers consisting of specifi c chemical moieties that are able to bind either covalently or noncovalently to the polymer surface. [ 4,5,14,15 ] However, to achieve sufficiently stable bonding, this general strategy requires the presence of reactive hydrophilic sites, typically OH groups, which are not typically observed on the surfaces of apolar, hydrophobic polymers, such as polyolefi ns, and need to be introduced via oxidizing pretreatments that are usually either energy-intensive or not environmentally friendly.…”

“…Alternative approaches, such as chemical grafting of fl uoropolymers by radical methods through irradiation, [ 6−8 ] plasma, [ 9−12 ] or direct fl uorination with fl uorine gas, [ 1,2,13 ] require only moderate amounts of fl uorinated surface modifi ers but are much more aggressive and, in some cases, potentially hazardous.…”

Synthesis of Aminated Poly(ether imide) for the Preparation of Bi-polar Membranes and Their Application to Hypochlorite Production through the Surface Direct Fluorination

“…This results in polymers with a set of unique properties such as enhanced thermostability, chemical stability, and good barrier properties. [19][20][21] In this direct fluorination, hydrogen atoms are substituted for fluorine while double and conjugated bonds are saturated with fluorine. The formation of cross-linking (formation of C-C or C-O-C bonds) and destruction of CSi bonds are dependent on nature of the polymer and treatment conditions.…”

“…20 Direct fluorination (i.e., treatment with elemental gaseous fluorine) can be used tomodify the surface properties of polymers. 20 One of the main advantages of direct fluorination is that only a thin surface layer of polymer is affected during modification.…”

“…20 Direct fluorination (i.e., treatment with elemental gaseous fluorine) can be used tomodify the surface properties of polymers. 20 One of the main advantages of direct fluorination is that only a thin surface layer of polymer is affected during modification. Hence the remaining, bulk properties of the polymer are practically unchanged, though the overall physico-chemical properties of the polymer are dictated by its thin modified layer.…”