Physically crosslinked hydrogels

The method consists of the retention by sorption of the porphyrins on poly (vinyl alcohol) (PVA) hydrogels. Poly (vinyl alcohol) (PVA) is selected as the polymer of choice for the purification of industrial and medical wastewaters due to its capacity to form physically crosslinked hydrogels with the advantages of non-toxic, non-carcinogenic and biodegradable properties. [Pg.143]

Grafts of poly(NIPAAm) have also been used to impart temperature responsive behavior to natural biomaterials for drug delivery, converting them into physically crosslinking hydrogels above the LCST of the poly(NIPAAm) portions. For example, poly(NIPAAm) grafted onto hyaluronic acid formed a gel upon injection which had a 12-hour burst release of riboflavin followed by sustained release (Ha et al. 2006). Similarly, chitosan with grafted poly(NIPAAm) was shown to release 5-fluorouracil at a controlled rate (J.W. Bae et al. 2006). [Pg.103]

Yan SF, Yin JB, Tang L, Chen XS (2011) Novel physically crosslinked hydrogels of carboxymethyl chitasan and cellulose ethers structure and controlled drug release behavior. J Appl Polym Sci 119 2350-2358... [Pg.249]

Polymers and Their Physically Crosslinked Hydrogels by Freeze-Thaw Technique 121... [Pg.121]

Supramolecular hydrogels based on polypseudorotaxanes of CDs and polymers are some of the most attractive physical crosslinking hydrogels that can be applied as... [Pg.211]

Zhang H, Zhang F, Wu J (2013) Physically crosslinked hydrogels from polysaccharides prepared by freeze-thaw technique. React Funct Polym 73(7) 923-928... [Pg.562]

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