Hydrogels derived from

Polyurethane hydrogels derived from UV curable urethane prepolymer and hydrophilic monomers were prepared and their properties were evaluated. The urethane prepolymer used in this study contained well-defined hard segments centered with a polyether-based soft segment and end-capped with methacrylate groups. The hydrophilic monomers studied were 2-hydroxyethyl methacrylate (HEMA), N-vinyl pyrrolidone, and glycerol methacrylate. Methacryloxypropyl tris(trimethysiloxy) silane (TRIS) was also used in some cases to modify properties. All compositions were UV... 

Mithieux, S. M., Rasko, J. E., and Weiss, A. S. (2004). Synthetic elastin hydrogels derived from massive elastic assemblies of self-organized human protein monomers. Biomaterials 25, 4921-4927. 

M.T. Wolf, K.A. Daly, E.P. Brennan-Pierce, S.A. Johnson, C.A. Carruthers, A. D Amore, S.P. Nagarkar, S.S. Velankar, S.F. Badylak, A hydrogel derived from decellularized dermal extracellular matrix, Biomaterials 33 (29) (2012) 7028-7038. 

Sawkins, M.J., Bowen, W., Dhadda, P, Markides, H., Sidney, L.E., Taylor, A.J., Rose, F.R., Badylak, S.F., Shakesheff, K.M., White, L.J., 2013. Hydrogels derived from demineralized and decellularized bone extracellular matrix. Acta Biomater. 9, 7865-7873. 

Hydrogels from lightly crosslinked MEEP absorb water but do not dissolve. The gels extrude water when the temperature is raised above the lower critical solution temperature (65 °C). Hydrogels derived from the ethoxyethojq ethojq derivative have a lower critical solution temperature (LOST) of 38 °C (close to human body temperature). 

Coneski PN, Wynne JH. Zwitterionic polyurethane hydrogels derived from carboxybeta-ine-functionalized diols. ACS Appl Mater Interfaces 2012 4(9) 4465-9. 

R. Hernandez, J. Sacristdn, L. Asin, T. Torres, M. Ibarra, G. Goya, and C. Mijangos, Magnetic hydrogels derived from polysaccharides with improved specific power absorption Potential devices for remotely tri ered drug delivery. The Journal of Physical Chemistry 5,114 (37), 12002-12007,2010. 

Hernandez, R., Sacristan, J., Asm, L., Torres, T. E., Ibarra, M. R., Goya, G. F., et al. (2010). Magnetic hydrogels derived from polysaccharides with improved specific power absorption potential devices for remotely triggered drug delivery. Journal of Physical Chemistry B, 114(37), 12002-12007. 

Velasco, D. et al. (2011) pH-sensitive polymer hydrogels derived from morpholine to prevent the crystallization of ibuprofen. J. Control. Release, 149 (2), 140-145. 

Hydrogels derived from these p[Pg.88]

Keane, T.J., Dziki, J., Castelton, A., Faulk, D.M., Messerschmidt, V., Londono, R., Reing, J.E., Velankar, S.S., Badylak, S.F., 2015. Preparation and characterization of a biologic scaffold and hydrogel derived from colonic mucosa. 1. Biomed. Mater. Res. B Appl. Biomater. 

An ionic polymer has been defined by Holliday (1) as a polymer which contains both covalent and ionic bonds in its structure. In the form of ionic pol)nner hydrogels, derived from polyelectrolytes by chemical gelation, they have found application in dentistry. The oldest class is the alginate impression material which is formed by a double decomposition reaction between sodium alginate and the salt of a divalent metal. Other classes are the ionomer and polycarboxy-late cements. 

In dex-MA (Fig.2) methacrylate esters are present which are sensitive to hydrolysis However, in hydrogels derived from dex-MA no significant hydrolysis of ester group occurs, even at extreme conditions (pH and temperature). As shown in the previous section, dex-MA can be rendered... 

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