Oxidized (ONC) and hydrolyzed (HNC) crystalline nanocelluloses were prepared from a high-grade pure industrial cotton waste fibre (CFT). They were grafted by glycidyl methacrylate (GMA) with a Fenton-type reaction, affording crystalline ONC-GMA and HNC-GMA, with molar substitution (MS) in the range of 1.3–2.2, where the GMA appendages did not substantially affect the crystallinity degree. Modified and unmodified nanocelluloses (NCs) were tested with respect to adsorption of amoxicillin (AM) and beta-naphtol (NPT). ONC and ONC-GMA adsorbed AM in large amounts. HNC adsorbed AM only when grafted with GMA. ONC, ONC-GMA, and HNC-GMA can be developed as renewable nanomaterials to remove AM from wastewater. ONC-GMA and HNC-GMA showed moderate capability to remove beta-naphtol from water. Bacterial NC (BNC) grafting afforded BNC-GMA with molar substitution (MS) in the range of 0.25–2.5. Until MS reached ca. 1.7, BNC-GMA maintained the hydrogel state. Higher MS transformed it into a powder. BNC and BNC-GMA were tested in adsorption and release processes of amoxicillin and vancomycin (VC). BNC adsorbed and released good amounts of AM. BNC-GMA with MS = 0.28 adsorbed and released vancomycin (VC) better than BNC, while BNC-GMA with MS = 1 adsorbed and released VC worse than BNC and BNC-GMA with MS = 0.28. BNCs loaded with VC could be developed as biocompatible wound dressing nanomaterials and tissue engineering scaffolds, while BNCs loaded with AM could be developed as drug delivery nanomaterials. All the tested NCs are crystalline in the range of 55–72%.

Nanocelluloses from cotton waste, bacterial nanocellulose and glycidyl methacrylate grafting: specific adsorption properties towards target molecules

255th National Meeting (2018)

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