Title: Photografted poly(acrylic acid) thin layers with ultra-high swelling ratios and high swelling and pH response rates
Abstract: Polymeric thin films with a stimuli-responsive surface layer have many potential applications. Surface photografting is a simple and versatile method for introducing grafted chains onto polymeric substrates. However, photografted layers usually have very low swelling ratios, swelling and stimuli-response rates. This work demonstrates that photografting of acrylic acid onto polyethylene films carried out with films on the top or at the bottom of a solution leads to huge differences in the grafting reactions and the final properties of the grafted layers. The photografting reaction on the top surface of a solution is much faster, and the grafted poly(acrylic acid) layers have ultra-high equilibrium swelling ratios (>100) and very high swelling and pH response rates (in seconds).
Publication Year: 2011
Publication Date: 2011-06-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 5
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