Smart hydrogels based on double responsive triblock terpolymers

Reinicke S, Schmelz J, Lapp A, Karg M, Hellweg T, Schmalz H (2009)
Soft Matter 5(13): 2648-2657.

Journal Article | Published | English

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Abstract
In this work a new kind of "smart'' hydrogel is presented, which is composed of a poly(2-vinylpyridine)-block-poly(ethylene oxide)-block-poly(glycidyl methyl ether-co-ethyl glycidyl ether) (P2VP-b-PEO-b-P( GME-co-EGE)) triblock terpolymer. The thermo-sensitive poly(glycidyl methyl ether-co-ethyl glycidyl ether) block exhibits a cloud point which is easily adjustable by the comonomer ratio. Copolymerization of GME and EGE produces nearly statistical copolymers with a weak preferential incorporation of GME, exhibiting a sharp coil-to-globule transition with almost no hysteresis. The triblock terpolymers aggregate in aqueous solution triggered by both pH and temperature. At sufficiently high concentration this stimuli-responsive behaviour leads to a reversible gel formation with gel strengths and transition points tuneable by pH, temperature, concentration, and block lengths. At pH 7, an unique gel-sol-gel transition accompanied with a strengthening of the gel is observed upon heating using rheology. Moreover, the structure of the low temperature gel phase is investigated by means of small-angle neutron scattering (SANS).
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Reinicke S, Schmelz J, Lapp A, Karg M, Hellweg T, Schmalz H. Smart hydrogels based on double responsive triblock terpolymers. Soft Matter. 2009;5(13):2648-2657.
Reinicke, S., Schmelz, J., Lapp, A., Karg, M., Hellweg, T., & Schmalz, H. (2009). Smart hydrogels based on double responsive triblock terpolymers. Soft Matter, 5(13), 2648-2657.
Reinicke, S., Schmelz, J., Lapp, A., Karg, M., Hellweg, T., and Schmalz, H. (2009). Smart hydrogels based on double responsive triblock terpolymers. Soft Matter 5, 2648-2657.
Reinicke, S., et al., 2009. Smart hydrogels based on double responsive triblock terpolymers. Soft Matter, 5(13), p 2648-2657.
S. Reinicke, et al., “Smart hydrogels based on double responsive triblock terpolymers”, Soft Matter, vol. 5, 2009, pp. 2648-2657.
Reinicke, S., Schmelz, J., Lapp, A., Karg, M., Hellweg, T., Schmalz, H.: Smart hydrogels based on double responsive triblock terpolymers. Soft Matter. 5, 2648-2657 (2009).
Reinicke, Stefan, Schmelz, Joachim, Lapp, Alain, Karg, Matthias, Hellweg, Thomas, and Schmalz, Holger. “Smart hydrogels based on double responsive triblock terpolymers”. Soft Matter 5.13 (2009): 2648-2657.
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