Interpenetrating Polymer Networks of Poly(N-vinylacetamide) and Stimuli Responsive Polymers Applied to Novel Amphiphilic Gel

Authors: Ajiro, Hiroharu; Takemoto, Yukie; Akashi, Mitsuru

Source: Journal of Nanoscience and Nanotechnology, Volume 11, Number 8, August 2011 , pp. 7047-7049(3)

Publisher: American Scientific Publishers

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The swelling behaviors of IPN with poly(N-vinylacetamide) (PNVA), which possibly converts from nonionic gel to cationic gel, and the stimuli responsive polymers, such as poly(acrylic acid) (PAAc) and poly(N-isopropylacrylamide) (PNIPAm) were investigated in order to prepare the stimuli responsive amphiphilic gel. When the monomer concentrations were uniformed at the IPN preparation, the obtained PNVA/PAAc IPN showed the pH responsivity with around 100 of swelling ratio at pH 4 to around 1 of swelling ratio at pH 2, although it lost the amphiphilicity due to the lack of swelling in ethanol. On the other hand, the gelation of N-vinylacetamide at 2 M in PNIPAM gel resulted in thermosensitive and amphiphilic hydrogel, that the swelling ratio in EtOH/water (3/7, v/v) also decreased, compared to the value in water at 25 °C.


Document Type: Short Communication


Publication date: August 1, 2011

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