I have been looking for method to increase hydroxyl group on epoxy resin surface.
From what I know I can use acid or base to break the epoxide group to produce hydroxyl group?
May I get your opinion if it is feasible?
Dear Si Abdul,
As you mentioned hydrolysis of epoxides to give the corresponding diols can be carried out by typical reagents : H3O+ or aq. NaOH. Note that epoxides are more reactive than normal ethers due to the high ring strain The nucleophile attacks the epoxide and opens the ring by breaking the C-O bond. Since the nucleophile attacks at 180o to the breaking C-O bond, the stereochemistry of the diol is trans.
Hoping this will be helpful,
Rafik
you can also make a treatment with an epoxy-functionel silane. This can be aplicated via aquos or watersolution. The epoxy group sticks to your resin and after hydrolysisthere are at least 3 hydroxy by every mol silane. Such silanes can be obtained from Aldrich, or cheaper Dow Corning, Wacker and Momentive.
I would suggest using ethanolamine or diethanolamine as a part of the curing system as they contain residual OH groups which would appear on the surface as well. The following file http://www.huntsman.com/performance_products/Media%20Library/a_MC348531CFA3EA9A2E040EBCD2B6B7B06/Home_MC348531CFA8BA9A2E040EBCD2B6B7B06/Technical%20Presentati_MC4296668862CCC36E040EBCD2B6B5BA5/files/Acceleration%20of%20Epoxy%20Resin%20Systems%20-%20Burton%20-%20Rev%202006.pdf ccontains further reactive accelertors with residual OH groups.
(ODA) Surfactant.a treatment with an epoxy resin-functionel grop by (ODA) Surfactant. a treatment with an epoxy resin-functionel grop by (ODA) Surfactant.you can useing a treatment with an epoxy resin-functionel grop by (ODA) Surfactant.
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