The article reports the fabrication of cellulose-layered double hydroxide (LDH) obtained by urea hydrolysis method. A wide characterization was carried out to assess the morphological, spectroscopic and barrier properties of LDH modified cellulose. The cellulose-LDH was then used as hybrid reinforcement in polyurethane (PU) composites. A slight improvement in thermal stability of PU was achieved and a better hydrophilicity was obtained, due to the intrinsic polarity of LDH. Elastic modulus of PU composites increased up to 48 MPa for a filler loading of 10% wt. Finally, UV barrier properties were studied in the range 280–700 nm. The produced composite showed a noticeable decrease in light transmission as the reinforcement content increase, displaying high light-blocking properties with a quasi-total resistance to transmission in UV range.

In situ one-step fabrication of layered double hydroxide deposited on cellulose: Effect of modified cellulose on physical properties of polyurethane composites

Viscusi G.;D'Amico F.;Gorrasi G.
2022

Abstract

The article reports the fabrication of cellulose-layered double hydroxide (LDH) obtained by urea hydrolysis method. A wide characterization was carried out to assess the morphological, spectroscopic and barrier properties of LDH modified cellulose. The cellulose-LDH was then used as hybrid reinforcement in polyurethane (PU) composites. A slight improvement in thermal stability of PU was achieved and a better hydrophilicity was obtained, due to the intrinsic polarity of LDH. Elastic modulus of PU composites increased up to 48 MPa for a filler loading of 10% wt. Finally, UV barrier properties were studied in the range 280–700 nm. The produced composite showed a noticeable decrease in light transmission as the reinforcement content increase, displaying high light-blocking properties with a quasi-total resistance to transmission in UV range.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/4795330
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