ABSTRACT
In the present study, phosphorylated nanocellulose (P-NC) has been prepared from date palm sheath fibers by a solvent-free acid hydrolysis procedure. Eighteen different treatment procedures were employed for the composite treatment of jute fabric. Different fractions of phosphorylated nanocellulose (1-4%) and chitosan (0.5-2%) were used to examine the effects of treatment procedures on the resulting jute fabric composites. Weight uptake, phosphorus content and tensile properties of the treated jute fabrics have been reported. ATR-FTIR spectroscopy, X-ray diffractometer, transmission electron microscopy, environmental scanning electron microscopy, energy-dispersive X-ray spectroscopy and thermo-gravimetric analysis were used to gain insight into the mechanism of interaction between jute fabric, CS macromolecules, and P-NCs. In addition, the development of antimicrobial and thermal stability properties on jute fabric has been investigated.
Subject(s)
Anti-Infective Agents/chemistry , Anti-Infective Agents/pharmacology , Biocompatible Materials/chemistry , Biocompatible Materials/pharmacology , Cellulose/chemistry , Chitosan/chemistry , Nanoparticles/chemistry , Chemical Phenomena , Materials Testing , Mechanical Phenomena , Phosphorylation , Spectroscopy, Fourier Transform Infrared , Tensile Strength , Thermodynamics , X-Ray DiffractionABSTRACT
Rice hulls (RH) and bean hulls (BH) were subjected to prehydrolysis treatments, to define the optimum conditions for producing a high percentage of hydrolyzed hemicellulose with a small or moderate degradation of the cellulosic portion. The hydrolysis experiments were performed using hydrochloric and sulfuric acids in concentrations ranging from (0.5 to 5)% (w/w) at 120 degrees C for 90 min and 10% consistency. The effects of different temperatures (80 to 120 degrees C) and time (30 to 120 min) on acid hydrolysis of lignocellulosic materials were recorded. It was found that, the optimum condition to hydrolyze the lignocellulosic materials (RH) and (BH) are 2% (w/w) of mineral acid at 120 degrees C for 90 min and 10% consistency. The cellulose crystallinity index in the different types of lignocellulosic materials with and without acid treatment, were increased from 0.32 to 0.46 in case of RH and from 0.43 to 0.61 in case of BH. Due to the lignin depolymerization during the pretreatment process, the relative absorbency of the methoxyl group and the aromatic rings bands were lowered for the pretreated than the untreated lignocellulosic materials. Also, the band at 1730 cm(-1) which is attributed to carbonyl groups of uronic acids was lowered due the hemicellulose hydrolysis.
