Structural FTIR analysis and thermal characterisation of lyocell and viscose-type fibres

Carrillo, Fernando; Colom, X.; Suñol, J.J.; Saurina, J.

doi:10.1016/j.eurpolymj.2004.05.003

Cited by 569 publications

(369 citation statements)

References 15 publications

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“…The lateral order index (LOI) is correlated with the overall degree of the ordered structure in the cellulose (Poletto et al 2014;Corgié et al 2011;Carrilo et al 2004). The cellulose LOI from unfermented materials ranged from 1.966 to 2.119 and after fermentation it was a bit higher and ranged from 1.974 to 2.360 (Table 4).…”

Section: Resultsmentioning

confidence: 99%

Transformation of Miscanthus and Sorghum cellulose during methane fermentation

et al. 2018

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The purpose of the paper is designation of the changes in the structure of cellulose after the methane fermentation process of Miscanthus and Sorghum harvested during the growing season and afterwards. The percentage and structure of cellulose before and after fermentation were studied. Investigations into changes of the cellulose structure were conducted by the SEC, FT-IR and XRD methods. The average percentage of cellulose after the growing season for Miscanthus varieties was higher and for Sorghum varieties was lower. As a result of the fermentation, the percentage of cellulose for both investigated species harvested in two growth seasons was lower. The degree of polymerisation for the plants harvested after the growing season was lower for the most feedstock. As a result of the fermentation process, the degree of polymerization increased for each of the investigated feedstock. However, crystallinity of cellulose remained at the same level for Miscanthus and decreased for Sorghum. It was shown that changes were different in the cellulose structure of the compared species.

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Section: Resultsmentioning

confidence: 99%

Transformation of Miscanthus and Sorghum cellulose during methane fermentation

et al. 2018

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“…On the other hand, the peaks for xylan from hemicelluloses are derived from molecular vibrations in the uronic acids at 1730 and 1600 cm -1 [28] . CEG sample showed a more prominent peak than CPT at around 1730 cm -1 while the band at 1600 cm -1 overlap with the band at 1642 cm -1 associated with adsorbed water in cellulose 19,22,23 . This may indicate that xylan is more alkali resistant and probably hemicelluloses can be precipitation on the surface of the eucalyptus cellulose fibers during kraft cooking 28,29 .…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 90%

“…The band at 1642 cm -1 is associated with adsorbed water in cellulose 19,22,23 . The bands at 1430, 1370, 1335 and 1320 cm -1 are attributed to CH 2 symmetric bending, CH bending, OH in plane bending, CH 2 rocking vibration, respectively [21][22][23] , and the bands at 1162, 1111, 1057, 1033, 898 cm -1 are assigned to asymmetric C-O-C bridge stretching, the anhydroglucose ring asymmetric stretching, C-O stretching, C-H in plane deformation, C-H deformation of cellulose, respectively [21][22][23][24]26 . On the other hand, the peaks for xylan from hemicelluloses are derived from molecular vibrations in the uronic acids at 1730 and 1600 cm -1 [28] .…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 99%

“…Several techniques as X-ray diffraction and FTIR spectroscopy were used to evaluate the wood and cellulose crystallinity 5,7,8,9,10,12 . However, FTIR spectroscopy has been used as a simple technique for obtaining rapid information about the structure of cellulose and chemical changes taking place in cellulose due to various treatments 10,21,22,[25][26][27] . As mentioned earlier, the crystalline structure of cellulose affects the physical, mechanical and thermal properties of cellulose fibers.…”

Section: Introductionmentioning

confidence: 99%

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Materials produced from plant biomass: part II: evaluation of crystallinity and degradation kinetics of cellulose

et al. 2012

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In this study Eucalyptus grandis (CEG) and Pinus taeda (CPT) cellulose fibers obtained from kraft and sulfite pulping process, respectively, were characterized using Fourier transform infrared (FTIR) spectroscopy and thermogravimetry (TGA). The degradation kinetic parameters were determined by TGA using Coats and Redfern method. FTIR results showed that CPT presented a more ordered structure with higher crystallinity than CEG. Thermogravimetric results showed that CPT had a higher thermal stability than CEG. The kinetic results revel that for CEG the degradation mechanism occurs mainly by random nucleation, although phase boundary controlled reactions also occurs while for CPT the degradation process is more related with phase boundary controlled reactions. Results demonstrated that differences between thermal stability and degradation mechanisms might be associated with differences in the cellulose crystalline structure probably caused by different pulping processes used for obtaining the cellulose fibers.

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“…20 The band at 1336 cm -1 and 1312 cm -1 are assigned to both crystalline celluloses ANTIBACTERIAL EFFICIENCY OF MODAL FABRIC A. R. Arul et al…”

Section: Ftir Spectramentioning

confidence: 99%

ANTIBACTERIAL EFFICIENCY OF MODAL FABRIC TREATED WITH OXIDES OF Ti/Si/Zn NANOCOMPOSITES

2017

RJC

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The antibacterial efficiency of nano TiO2, TiO2/SiO2, TiO2/ZnO and TiO2/SiO2/ZnO Nanocomposites coated on modal fabric using dip coating was evaluated using Fourier infrared spectroscopy, Transmission electron microscopy, scanning electron microscopy and zone of inhibition against Bacillus subttilis. The particle size varies between 17.9 nm to 46.4 nm. The fabric treated with TiO2/SiO2/ZnO exhibited a maximum zone of inhibition of 53 mm followed by 47 mm and 43 mm for TiO2 and TiO2/ZnO treated fabrics respectively.TiO2/SiO2 treated fabric has shown a minimal zone of inhibition of 36 mm.

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Structural FTIR analysis and thermal characterisation of lyocell and viscose-type fibres

Cited by 569 publications

References 15 publications

Transformation of Miscanthus and Sorghum cellulose during methane fermentation

Transformation of Miscanthus and Sorghum cellulose during methane fermentation

Materials produced from plant biomass: part II: evaluation of crystallinity and degradation kinetics of cellulose

ANTIBACTERIAL EFFICIENCY OF MODAL FABRIC TREATED WITH OXIDES OF Ti/Si/Zn NANOCOMPOSITES

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