Hydrophobic modification of cellulose isolated from Agave angustifolia fibre by graft copolymerisation using methyl methacrylate

Noor Afizah Rosli, Ishak Ahmad, Ibrahim Abdullah, Farah Hannan Anuar, Faizal K.P. Kunchi Mohamed

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Graft copolymerisation of methyl methacrylate (MMA) onto Agave angustifolia was conducted with ceric ammonium nitrate (CAN) as the redox initiator. The maximum grafting efficiency was observed at CAN and MMA concentrations of 0.91 × 10-3 and 5.63 × 10-2 M, respectively, at 45 °C for 3 h reaction time. Four characteristic peaks at 2995, 1738, 1440, and 845 cm-1, attributed to PMMA, were found in the IR spectrum of grafted cellulose. The crystallinity index dropped from 0.74 to 0.46, while the thermal stability improved upon grafting. The water contact angle increased with grafting yield, indicating increased hydrophobicity of cellulose. SEM images showed the grafted cellulose to be enlarged and rougher. The changes in the physical nature of PMMA-grafted cellulose can be attributed to the PMMA grafting in the amorphous regions of cellulose, causing it to expand at the expense of the crystalline component.

Original languageEnglish
Pages (from-to)69-75
Number of pages7
JournalCarbohydrate Polymers
Volume125
DOIs
Publication statusPublished - 10 Jul 2015

Fingerprint

Methacrylates
Grafts
Cellulose
Copolymerization
Polymethyl Methacrylate
Fibers
Nitrates
Hydrophobicity
Contact angle
Thermodynamic stability
Crystalline materials
Scanning electron microscopy
Water

Keywords

  • Cellulose
  • Free radical
  • Graft copolymerization
  • Hydrophobic
  • Methyl methacrylate

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics

Cite this

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title = "Hydrophobic modification of cellulose isolated from Agave angustifolia fibre by graft copolymerisation using methyl methacrylate",
abstract = "Graft copolymerisation of methyl methacrylate (MMA) onto Agave angustifolia was conducted with ceric ammonium nitrate (CAN) as the redox initiator. The maximum grafting efficiency was observed at CAN and MMA concentrations of 0.91 × 10-3 and 5.63 × 10-2 M, respectively, at 45 °C for 3 h reaction time. Four characteristic peaks at 2995, 1738, 1440, and 845 cm-1, attributed to PMMA, were found in the IR spectrum of grafted cellulose. The crystallinity index dropped from 0.74 to 0.46, while the thermal stability improved upon grafting. The water contact angle increased with grafting yield, indicating increased hydrophobicity of cellulose. SEM images showed the grafted cellulose to be enlarged and rougher. The changes in the physical nature of PMMA-grafted cellulose can be attributed to the PMMA grafting in the amorphous regions of cellulose, causing it to expand at the expense of the crystalline component.",
keywords = "Cellulose, Free radical, Graft copolymerization, Hydrophobic, Methyl methacrylate",
author = "Rosli, {Noor Afizah} and Ishak Ahmad and Ibrahim Abdullah and Anuar, {Farah Hannan} and {K.P. Kunchi Mohamed}, Faizal",
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T1 - Hydrophobic modification of cellulose isolated from Agave angustifolia fibre by graft copolymerisation using methyl methacrylate

AU - Rosli, Noor Afizah

AU - Ahmad, Ishak

AU - Abdullah, Ibrahim

AU - Anuar, Farah Hannan

AU - K.P. Kunchi Mohamed, Faizal

PY - 2015/7/10

Y1 - 2015/7/10

N2 - Graft copolymerisation of methyl methacrylate (MMA) onto Agave angustifolia was conducted with ceric ammonium nitrate (CAN) as the redox initiator. The maximum grafting efficiency was observed at CAN and MMA concentrations of 0.91 × 10-3 and 5.63 × 10-2 M, respectively, at 45 °C for 3 h reaction time. Four characteristic peaks at 2995, 1738, 1440, and 845 cm-1, attributed to PMMA, were found in the IR spectrum of grafted cellulose. The crystallinity index dropped from 0.74 to 0.46, while the thermal stability improved upon grafting. The water contact angle increased with grafting yield, indicating increased hydrophobicity of cellulose. SEM images showed the grafted cellulose to be enlarged and rougher. The changes in the physical nature of PMMA-grafted cellulose can be attributed to the PMMA grafting in the amorphous regions of cellulose, causing it to expand at the expense of the crystalline component.

AB - Graft copolymerisation of methyl methacrylate (MMA) onto Agave angustifolia was conducted with ceric ammonium nitrate (CAN) as the redox initiator. The maximum grafting efficiency was observed at CAN and MMA concentrations of 0.91 × 10-3 and 5.63 × 10-2 M, respectively, at 45 °C for 3 h reaction time. Four characteristic peaks at 2995, 1738, 1440, and 845 cm-1, attributed to PMMA, were found in the IR spectrum of grafted cellulose. The crystallinity index dropped from 0.74 to 0.46, while the thermal stability improved upon grafting. The water contact angle increased with grafting yield, indicating increased hydrophobicity of cellulose. SEM images showed the grafted cellulose to be enlarged and rougher. The changes in the physical nature of PMMA-grafted cellulose can be attributed to the PMMA grafting in the amorphous regions of cellulose, causing it to expand at the expense of the crystalline component.

KW - Cellulose

KW - Free radical

KW - Graft copolymerization

KW - Hydrophobic

KW - Methyl methacrylate

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