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Effects of polymorph transformation via mercerisation on microcrystalline cellulose fibres and isolation of nanocrystalline cellulose fibres


Citation

Osman Al-Edrus, Syeed Saifulazry and Chuah, Teong Guan and Md. Tahir, Paridah and Aung, Min Min and Zainudin, Edi Syams (2017) Effects of polymorph transformation via mercerisation on microcrystalline cellulose fibres and isolation of nanocrystalline cellulose fibres. Pertanika Journal of Science & Technology, 25 (4). pp. 1275-1290. ISSN 0128-7680; ESSN: 2231-8526

Abstract / Synopsis

Cellulose I can be irreversible transformed into cellulose II via mercerisation or regeneration treatments. In the past few decades, mercerisation was used mainly to improve fibre properties for textile industries. A few studies have focused on the effects of mercerisation treatment on the cellulose polymorph itself and after it was downscaled to nanosize. This study aims to characterise the micro size crystalline cellulose after complete polymorph conversion via mercerisation technique and investigate its effects on isolation to nanosize crystalline cellulose. A microcrystalline cellulose (MCC) was purchased and converted into cellulose II via mercerisation technique. Sulphuric acid hydrolysis was carried-out to produce nanocrystalline cellulose (NCC). The MCC and NCC of different polymorphs were then characterised and analysed for its crystallography, morphology, particles size distribution and thermal stability using wide-angle X-ray diffraction (WXRD), electron microscopes, dynamic light scattering analyser and thermogravimetric analyser, respectively. Both MCC and NCC fibres showed complete conversion of cellulose I to cellulose II and decrement of crystallinity index (CI). Electron micrographs revealed that both cellulose II polymorph fibres (MCC II and NCC II) were morphological affected. The analysis of size distribution and dimension measurement confirmed that mercerisation treatment causing increment in fibre diameter and shortened length. The thermal stability of both cellulose II polymorph fibres (MCC II and NCC II) was also found to be improved.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Faculty of Forestry
Faculty of Science
Institute of Tropical Forestry and Forest Products
Publisher: Universiti Putra Malaysia Press
Keywords: Nanocrystalline cellulose; Microcrystalline cellulose; Mercerization; Alkaline treatment; Cellulose polymorph
Depositing User: Nabilah Mustapa
Date Deposited: 10 Jan 2018 16:50
Last Modified: 25 Jan 2018 17:06
URI: http://psasir.upm.edu.my/id/eprint/58329
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