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Gel behavior of cellulose nanofiber smart materials


Cellulose particles with dimensions in the nanometer range are biomaterials with potentially useful characteristics. Nowadays, intensive research efforts have been directed to deploy cellulose nanoparticles as a platform to produce "smart" materials These nanomaterials respond to external stimuli, such as pH, light or heat and when they possess thermos responsive properties, they can be extremely valuable for biomedical applications. In this proposed project, cellulose nanofibers (CNF) will be extracted from sugarcane bagasse to produce thermos responsive materials, Poly (oligo ethylene glycol methacrylate) (POEGMA) brushes will be polymerized from CNF surface, producing hydrogels with different LCSTs (Lower Solution Critical I Temperature). Chemical and morphological characterization of the smart materials prepared by radical polymerization will be evaluated. Furthermore, the gelation properties of CNF-POEGMA systems will be analyzed by temperature and DSC measurements. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SOUZA, SIVONEY FERREIRA; MARIANO, MARCOS; DE FARIAS, MARCELO A.; BERNARDES, JULIANA SILVA. Effect of depletion forces on the morphological structure of carboxymethyl cellulose and micro/nano cellulose fiber suspensions. Journal of Colloid and Interface Science, v. 538, p. 228-236, . (17/50133-8, 16/04514-7)
SILVA, CAROLINE E. P.; TAM, KAM C.; BERNARDES, JULIANA S.; LOH, WATSON. Double stabilization mechanism of O/W Pickering emulsions using cationic nanofibrillated cellulose. Journal of Colloid and Interface Science, v. 574, p. 207-216, . (15/25406-5, 17/50133-8, 16/04514-7)
TANG, JUNTAO; SONG, YANG; ZHAO, FEIPING; SPINNEY, STEWART; BERNARDES, JULIANA DA SILVA; TAM, KAM CHIU. Compressible cellulose nanofibril (CNF) based aerogels produced via a bio-inspired strategy for heavy metal ion and dye removal. Carbohydrate Polymers, v. 208, p. 404-412, . (17/50133-8)

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