Effect of acid hydrolysis on regenerated kenaf core membrane produced using aqueous alkaline-urea systems

Farah Nadia Mohammad Padzil, Sarani Zakaria, Chin Hua Chia, Sharifah Nabihah Syed Jaafar, Hatika Kaco, Sinyee Gan, Peivun Ng

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Bleached kenaf core pulps (BKC) were hydrolyzed in H<inf>2</inf>SO<inf>4</inf> (0.5 M) at different time (0 min to 90 min) at room temperature. After the hydrolysis process, the viscosity average molecular weight (M<inf>Latin small letter Eng</inf>) for BKC sample has reduced from 14.5 × 10<sup>4</sup> to 2.55 × 10<sup>4</sup>. The hydrolyzed BKC was then dissolved in NaOH:urea:water and in LiOH:urea:water mixed solvent at the ratio of 7:12:81 and 4.6:15:80.4, respectively. The increased in hydrolysis time has decreased M<inf>Latin small letter Eng</inf> of cellulose leading to easy dissolution process. Higher porosity and transparency with lower crystallinity index (CrI) of regenerated membrane produced can be achieved as the M<inf>Latin small letter Eng</inf> reduced. The properties of membrane were observed through FESEM, UV-vis spectrophotometer and XRD. This study has proven that acid hydrolysis has reduced the M<inf>Latin small letter Eng</inf> of cellulose, thus, enhanced the properties of regenerated membrane produced with assisted by alkaline/urea system.

Original languageEnglish
Pages (from-to)164-171
Number of pages8
JournalCarbohydrate Polymers
Volume124
DOIs
Publication statusPublished - 25 Jun 2015

Fingerprint

Urea
Pulp
Hydrolysis
Membranes
Cellulose
Acids
Ultraviolet spectrophotometers
Water
Transparency
Dissolution
Porosity
Molecular weight
Viscosity
Temperature

Keywords

  • Cellulose membrane
  • Crystallinity index
  • Solubility
  • Sulphuric acid
  • Ubbelohde viscometer
  • Viscosity average molecular weight

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Effect of acid hydrolysis on regenerated kenaf core membrane produced using aqueous alkaline-urea systems. / Padzil, Farah Nadia Mohammad; Zakaria, Sarani; Chia, Chin Hua; Syed Jaafar, Sharifah Nabihah; Kaco, Hatika; Gan, Sinyee; Ng, Peivun.

In: Carbohydrate Polymers, Vol. 124, 25.06.2015, p. 164-171.

Research output: Contribution to journalArticle

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AU - Chia, Chin Hua

AU - Syed Jaafar, Sharifah Nabihah

AU - Kaco, Hatika

AU - Gan, Sinyee

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