Characterization of henequen natural fiber by using two-dimensional correlation spectroscopy

Han, Seong Ok; Jung, Young Mee

doi:10.1016/j.molstruc.2007.12.027

Cited by 13 publications

(11 citation statements)

References 23 publications

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“…The alkyl (C-H, CH 2 , C-CH 3 ) groups that are found in the cellulose, hemicelluloses, and lignin were detected in the region of 2929 cm -1 . The frequency at 1737 cm −1 showed a weak intensity, which is principally attributed to the carbonyl group stretching from the hemicelluloses (Han and Jung 2008). The occurrence of a weak alkene C=C bond from lignin is found in the region of 1610 cm -1 .…”

Section: Fourier Transform Infrared Spectroscopy Analysismentioning

confidence: 89%

Effects of Partial Replacement of Rattan Powder by Commercial Fillers on the Properties of Natural Rubber Composites

Muniandy¹,

Ismail²,

Othman³

2012

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The effects of partial replacement of rattan powder (RP) by carbon black (CB), mica, and calcium carbonate (CaCO 3 ) on the curing characteristics, tensile properties, rubber-filler interaction, and morphological studies of natural rubber (NR) composites were investigated. Rattan powder with an average particle size of less than 180 µm was used in this study. NR/RP/CB, NR/RP/mica, and NR/RP/CaCO 3 composites with five different RP/commercial fillers loadings (i.e. 30/0, 20/10, 15/15, 10/20, 0/30 phr) were prepared using a laboratory size two-roll mill. Results showed that the maximum torque (M H ) of the NR/RP/CB, NR/RP/mica, and NR/RP/CaCO 3 composites increased with increasing the commercial filler-loading ratio. The scorch time (t s2 ) and cure time (t 90 ) of NR/RP/CB composites decreased as the ratio of CB loading was increased, whereas, t s2 and t 90 of NR/RP/mica and NR/RP/CaCO 3 composites increased as mica and CaCO 3 loading ratio were raised, respectively. The tensile strength, elongation at break (E b ), stress at 100% elongation (M100), and stress at 300% elongation (M300) of all the composites increased as the commercial filler-loading ratio increased. This is due to the presence of the commercial filler, which brought a better rubber-filler interaction, as confirmed by the rubber-filler interaction and scanning electron microscopy (SEM) studies.

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Section: Fourier Transform Infrared Spectroscopy Analysismentioning

confidence: 89%

Effects of Partial Replacement of Rattan Powder by Commercial Fillers on the Properties of Natural Rubber Composites

Muniandy¹,

Ismail²,

Othman³

2012

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“…Also, the intensity of bands at 1738 cm -1 from carbonyl group stretching was reduced or almost absent due to hemicellulose removal. The decrease of the intensity of a band at 1608 cm -1 can be explained by the removal of OH bending in the absorbed water molecules by alkalization (Han and Jung 2008).…”

Section: Spectral Analysis Of Fibermentioning

confidence: 99%

Fabrication, Characterization, and Evaluation of Luffa cylindrica Fiber Reinforced Epoxy Composites

Saw

Purwar²,

Nandy³

et al. 2013

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Because of the increasing awareness of the environment and energy issues, as well as advances in technology, the areas of application for annual plant fiber functional materials are expanding. In this work, two chemical treatments, alkalization (2 h agitation with 5% NaOH) and furfurylation (graft furfuryl alcohol followed by oxidation with (1N) NaClO 2 solution), were conducted on Luffa cylindrica fiber surfaces. The grafting of furfuryl alcohol followed by oxidation-generated quinines showed better results than alkaline treatment with respect to enhancement of surface area and hydrophobicity as well as wax, lignin, and hemicellulose extraction. The efficiency of chemical treatments was verified by elemental analysis and FTIR spectroscopy. Differential scanning calorimetry, thermo-gravimetric analysis, scanning electron microscopy, water absorption, and mechanical tests were performed to determine the thermal, mechanical, and morphological properties of untreated and chemically treated luffa fiber reinforced epoxy composites. Microstructures of the composites were examined to determine the mechanisms for the fiber-matrix interaction, which affects the thermal stability, water absorption, and mechanical behavior of the composites. The data from the water absorption process of composites at various temperatures were analyzed using a diffusion model based on Fick's law.

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“…This is due to the alkalinisation treatment, which causes the removal of hemicellulose. According to Han and Jung (2008), the decreased intensity of the band at 1608.63 cm -1 is due to the removal of O-H bending because that tends to absorb water molecules throughout the alkalization treatment. A similar peak can be observed in the spectra between the untreated and treated reinforced luffa fiber epoxy composites that contribute to the C-H stretching at the peak of 2850.79 cm -1 .…”

Section: Spectral Analysismentioning

confidence: 99%

Processing and Characterization of Epoxy/Luffa Composites: Investigation on Chemical Treatment of Fibers on Mechanical and Acoustical Properties

et al. 2014

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This study focuses on the development of epoxy/luffa composites and the investigation of their mechanical and acoustical properties. The fibers underwent an alkalization treatment, and its effects on the mechanical and sound absorption properties of the composites were measured utilizing a universal testing machine and two-microphone transfer function impedance tube methods. The effects of chemical modifications on the fibers were studied using a scanning electron microscope (SEM). The thermal analyses of composites were conducted using thermo-gravimetric analysis (TGA). The composite's functional group was identified and evaluated using Fourier transform infrared spectroscopy (FTIR). The sound absorption coefficient of untreated and treated composites across a range of frequencies was very similar. Untreated composites appeared to perform better than those that were treated. Compared with untreated fiber composites, there was an improvement in the tensile strength of the treated fiber composites. The SEM characterization showed that the alkaline treatment changed the morphology of the fibers, resulting in a decrease in the sound absorption coefficients of the composites. The thermal characterization of composites showed that dehydration and degradation of lignin occurred in a temperature range of 40 to 260 °C, and the maximum percentage of cellulose was found to decompose at 380 °C.

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Characterization of henequen natural fiber by using two-dimensional correlation spectroscopy

Cited by 13 publications

References 23 publications

Effects of Partial Replacement of Rattan Powder by Commercial Fillers on the Properties of Natural Rubber Composites

Effects of Partial Replacement of Rattan Powder by Commercial Fillers on the Properties of Natural Rubber Composites

Fabrication, Characterization, and Evaluation of Luffa cylindrica Fiber Reinforced Epoxy Composites

Processing and Characterization of Epoxy/Luffa Composites: Investigation on Chemical Treatment of Fibers on Mechanical and Acoustical Properties

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