Poly(glycidyl methacrylate)/bacterial cellulose nanocomposites: preparation, characterization and post-modification

Faria, Marisa; Vilela, Carla; Mohammadkazemi, Faranak; Silvestre, Armando J.D.; Freire, Carmen S. R.; Cordeiro, Nereida

http://hdl.handle.net/10400.13/3309

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Authors

Faria, Marisa

Vilela, Carla

Mohammadkazemi, Faranak

Silvestre, Armando J.D.

Freire, Carmen S. R.

Cordeiro, Nereida

Abstract(s)

Nanocomposites composed of poly(glycidyl methacrylate) (PGMA) and bacterial cellulose (BC) were prepared by the in-situ free radical polymerization of glycidyl methacrylate (GMA) inside the BC network. The resulting nanocomposites were characterized in terms of structure, morphology, water-uptake capacity, thermal stability and viscoelastic properties. The three-dimensional structure of BC endowed the nanocomposites with good thermal stability (up to 270 °C) and viscoelastic properties (minimum storage modulus = 80 MPa at 200 °C). In addition, the water-uptake and crystallinity decreased with the increasing content of the hydrophobic and amorphous PGMA matrix. These nanocomposites were then submitted to post-modification via acid-catalysed hydrolysis to convert the hydrophobic PGMA into the hydrophilic poly(glyceryl methacrylate) (PGOHMA) counterpart, which increased the hydrophilicity of the nanocomposites and consequently improved their water-uptake capacity. Besides, the post-modified nanocomposites maintained a good thermal stability (up to 250 °C), viscoelastic properties (minimum storage modulus = 171 MPa at 200 °C) and porous structure. In view of these results, the PGMA/BC nanocomposites can be used as functional hydrophobic nanocomposites for post-modification reactions, whereas the PGOHMA/BC nanocomposites might have potential for biomedical applications requiring hydrophilic, swellable and biocompatible materials.

Keywords

Bacterial cellulose nanocomposites Poly(glycidyl methacrylate) Post-modification . Faculdade de Ciências Exatas e da Engenharia

URI

http://hdl.handle.net/10400.13/3309

Citation

Faria, M., Vilela, C., Mohammadkazemi, F., Silvestre, A. J., Freire, C. S., & Cordeiro, N. (2019). Poly (glycidyl methacrylate)/bacterial cellulose nanocomposites: Preparation, characterization and post-modification. International journal of biological macromolecules, 127, 618-627.