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Extraction and characterization of cellulose nanocrystals from tea leaf waste fibers

The aim was to explore the utilization of tea leaf waste fibers (TLWF) as a source for the production of cellulose nanocrystals (CNC). TLWF was first treated with alkaline, followed by bleaching before being hydrolyzed with concentrated sulfuric acid. The materials attained after each step of chemic...

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Autores Principales: Abdul Rahman, Nur Hayati, Chieng, Buong Woei, Ibrahim, Nor Azowa, Abdul Rahman, Norizah
Formato: Artículo
Lenguaje:English
Publicado: MDPI 2017
Acceso en línea:http://psasir.upm.edu.my/id/eprint/35436/1/35436.pdf
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spelling oai:psasir.upm.edu.my:35436 http://psasir.upm.edu.my/id/eprint/35436/ Extraction and characterization of cellulose nanocrystals from tea leaf waste fibers Abdul Rahman, Nur Hayati Chieng, Buong Woei Ibrahim, Nor Azowa Abdul Rahman, Norizah The aim was to explore the utilization of tea leaf waste fibers (TLWF) as a source for the production of cellulose nanocrystals (CNC). TLWF was first treated with alkaline, followed by bleaching before being hydrolyzed with concentrated sulfuric acid. The materials attained after each step of chemical treatments were characterized and their chemical compositions were studied. The structure analysis was examined by Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). From FTIR analysis, two peaks at 1716 and 1207 cm−1—which represent C=O stretching and C–O stretching, respectively—disappeared in the spectra after the alkaline and bleaching treatments indicated that hemicellulose and lignin were almost entirely discarded from the fiber. The surface morphology of TLWF before and after chemical treatments was investigated by scanning electron microscopy (SEM) while the dimension of CNC was determined by transmission electron microscopy (TEM). The extraction of CNC increased the surface roughness and the crystallinity index of fiber from 41.5% to 83.1%. Morphological characterization from TEM revealed the appearance of needle-like shaped CNCs with average diameter of 7.97 nm. The promising results from all the analyses justify TLWF as a principal source of natural materials which can produce CNC. MDPI 2017 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/35436/1/35436.pdf Abdul Rahman, Nur Hayati and Chieng, Buong Woei and Ibrahim, Nor Azowa and Abdul Rahman, Norizah (2017) Extraction and characterization of cellulose nanocrystals from tea leaf waste fibers. Polymers, 9 (11). art. no. 588. pp. 1-11. ISSN 2073-4360 http://www.mdpi.com/2073-4360/9/11/588 10.3390/polym9110588
institution UPM IR
collection UPM IR
language English
description The aim was to explore the utilization of tea leaf waste fibers (TLWF) as a source for the production of cellulose nanocrystals (CNC). TLWF was first treated with alkaline, followed by bleaching before being hydrolyzed with concentrated sulfuric acid. The materials attained after each step of chemical treatments were characterized and their chemical compositions were studied. The structure analysis was examined by Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). From FTIR analysis, two peaks at 1716 and 1207 cm−1—which represent C=O stretching and C–O stretching, respectively—disappeared in the spectra after the alkaline and bleaching treatments indicated that hemicellulose and lignin were almost entirely discarded from the fiber. The surface morphology of TLWF before and after chemical treatments was investigated by scanning electron microscopy (SEM) while the dimension of CNC was determined by transmission electron microscopy (TEM). The extraction of CNC increased the surface roughness and the crystallinity index of fiber from 41.5% to 83.1%. Morphological characterization from TEM revealed the appearance of needle-like shaped CNCs with average diameter of 7.97 nm. The promising results from all the analyses justify TLWF as a principal source of natural materials which can produce CNC.
format Article
author Abdul Rahman, Nur Hayati
Chieng, Buong Woei
Ibrahim, Nor Azowa
Abdul Rahman, Norizah
spellingShingle Abdul Rahman, Nur Hayati
Chieng, Buong Woei
Ibrahim, Nor Azowa
Abdul Rahman, Norizah
Extraction and characterization of cellulose nanocrystals from tea leaf waste fibers
author_facet Abdul Rahman, Nur Hayati
Chieng, Buong Woei
Ibrahim, Nor Azowa
Abdul Rahman, Norizah
author_sort Abdul Rahman, Nur Hayati
title Extraction and characterization of cellulose nanocrystals from tea leaf waste fibers
title_short Extraction and characterization of cellulose nanocrystals from tea leaf waste fibers
title_full Extraction and characterization of cellulose nanocrystals from tea leaf waste fibers
title_fullStr Extraction and characterization of cellulose nanocrystals from tea leaf waste fibers
title_full_unstemmed Extraction and characterization of cellulose nanocrystals from tea leaf waste fibers
title_sort extraction and characterization of cellulose nanocrystals from tea leaf waste fibers
publisher MDPI
publishDate 2017
url http://psasir.upm.edu.my/id/eprint/35436/1/35436.pdf
_version_ 1819295786817552384
score 13.4562235

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