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

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.

Extraction and modification of cellulose from Artocarpus heterophyllus for biosorption of lead ion from aqueous solution as cost effective biosorbent

“…To determine the pHpzc of modified cellulose, was conducted according to the study of Kuncoro et al [24] and Viscusi et al [25] with slight modification salt addition method was used in which a series of 6 mL Erlenmeyer flasks containing 0.05 g of modified cellulose were filled with 50 mL of 0.125 M KNO3 and the initial pH was adjusted as 2, 4, 6, 8, 10, and 12 using 0.1 M HNO3 and 0.1 M NaOH. The Erlenmeyer flasks were kept at room temperature in water bath and left for 48 h on a rotary shaker at 180 rpm; afterward the supernatant solution was filtered, and final pH was determined using a pH meter.…”