Hydrogels fibrous forms

Photolithography and microfabrication are techniques used for the formation of scaffolds of specific shape and with distinct surface properties. Three-dimensional scaffolds are composed of hydrogels like biodegradable lactide/glycolic acid copolymers or nonbiodegradable polydimethylsiloxane. In the case of lactide/glycolic acid copolymers, the polymer is formed into a fibrous... 

Focus has changed with time from nonabsorbable to absorbable polymers. Absorbable polymers typically take the form of fibrous meshes, porous scaffolds, or hydrogels. If the polymer can degrade at a controlled rate, the body s own cells can infiltrate the matrix and replace the polymer space with natural tissue. The use of an absorbable polymer can have many advantages, such as the following ... 

Three-dimensional porous scaffolds have been developed in several forms (eg, fibrous meshes, foams, sponge-Uke structures, hydrogels, microparticles, selfassembling peptides) by means of a wide range of fabrication techniques such as... 

Kimizuka s group reported that aqueous dispersion of cationic L-glutamate derivatives 39 and 40 with two alkyl tails gives fibrous nanoassemblies with the bilayer structure (Fig. 22). When anionic naphthalene dye 41 was added to the aqueous bilayer of 40 with long undecyl tails, immediate precipitation occurred. Apparently, formation of the hydrophobic ion-pair destabilizes the long-chained ammonium bilayer of 40. On the other hand, 39 with short octyl tails formed a transparent hydrogel in the presence of anionic dye 41... 

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