Extraction of nanocellulose from pineapple leaves by acid-hydrolysis and pressurized acid hydrolysis for reinforcement in natural rubber composites

摘要

This work aimed to study the extraction of nanocellulose(CNC)from pineapple leaves(PL)for using as a reinforcing filler in the natural rubber.PL mainly consists of cellulose so it is properly used for nanocellulosic extraction.The extractions were performed by acid-hydrolysis and pressurized acid-hydrolysis methods.The morphology and structure of the extracted nanocelluloses were compared and investigated using transmission electron microscope,Fourier transformed infrared,and X-ray diffraction analysis.It was found that pineapple leave has 27.64% of a-cellulose.The size of celluloses,which were extracted and hydrolyzed by acid-hydrolysis and pressurized acid hydrolysis,were reduced to 130 and 117 nm,respectively.And the shape was rodlike.The crystallinity index(CrI)of CNC was increased to 92.95 % and 91.24 % when it was treated by acid hydrolysis and pressurized acid hydrolysis,respectively.