Characterization of microcrystalline cellulose prepared from lignocellulosic materials. Part II: Physicochemical properties

Adel, Abeer M.; El–Wahab, Zeinab H. Abd; Ibrahim, A. A.; Al–Shemy, Mona T.

doi:10.1016/j.carbpol.2010.08.039

Cited by 228 publications

(97 citation statements)

References 22 publications

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“…For all samples, the bands around 2910 to 2930 cm -1 are attributed to C-H n asymmetric stretching present mainly in cellulose, which was the major component of the lignocellulosic fibers 21,26 . The band near 1735 cm -1 assigned to unconjugated stretching vibrations of the C=O of the carbonyl and acetyl groups in the xylan component of hemicellulose was clearly seen on PCF fibers and it was observed as a shoulder for RH fibers [27][28][29][30] .…”

Section: Fourier-transform Infrared Spectroscopy (Ftir)mentioning

confidence: 95%

Characterization of Fibers from Pineapple's Crown, Rice Husks and Cotton Textile Residues

Prado

Spinace

2015

Mat. Res.

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Fibers from pineapple's crown (PCF), rice husks (RH) and cotton textile residues (RTF) were characterized by SEM, X-ray diffraction, FTIR and thermogravimetric analysis. Moisture content, water absorption, density and the distribution of the diameter of the fibers were also evaluated. RTF showed cylindrical microstructure with smooth surface, PCF showed cellular structure and the microstructure of RH is globular, showing cell pattern of the outer surface epidermis which is well organized and has a corrugate structure. PCF and RH showed crystallographic planes of cellulose I and RTF showed a mixture of cellulose I and cellulose II. RTF showed the highest degree of crystallinity and the lower moisture content and water absorption. These results occur because the RTF has no hemicellulose, as verified by FTIR. Comparing the three fibers, the RTF presented the lowest density and diameter. Furthermore, the onset degradation temperature of RTF was 40 °C higher than the PCF and the RH.

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Section: Fourier-transform Infrared Spectroscopy (Ftir)mentioning

confidence: 95%

Characterization of Fibers from Pineapple's Crown, Rice Husks and Cotton Textile Residues

Prado

Spinace

2015

Mat. Res.

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“…Because of their complexity, the spectra were separated into two regions, namely: the OH and CH stretching vibrations in the 4000-2700 cm -1 region, showed in Figure 1a, and the "fingerprint" region which is assigned to different stretching vibrations of different groups in 1800-800 cm -1 , Figure 1b. It can be observed in Figure 1a a strong broad band in the region of 3700-3000 cm -1 which is assigned to different OH stretching modes and another band in the region of 3000-2800 cm -1 is ascribed to the stretching of asymmetric and symmetric methyl and methylene CH cellulose groups 19 . The band at around 3360 cm -1 related with OH stretching modes is more prominent for CPT than for CEG.…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 97%

“…FTIR spectroscopy has been used as a simple technique for obtaining rapid information about the chemical structure and crystallinity of celluloses samples 5,19 . Contrary to conventional chemical analysis, this method requires small sample sizes, short analysis time besides being non-destructive 20 .…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 99%

“…Figure 1b shows that in the "fingerprint" region the spectra revealed several bands. 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 .…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

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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“…The surface (Fig. 2a) shows irregular fiber fragments or irregular shaped fibrils and has a network structure [23][24] but after interacted with 3-chloropropyltrimethoxysilane appeared obviously diverse (Fig. 2b).…”

Section: Semmentioning

confidence: 99%

Synthesis, Characterization of Cellulose Modified with 2-Mercaptobenzothiazole and Its Adsorption To Cu(II) Ion in Aqueous Solution

Fatoni¹,

Koesnarpadi

Hidayati

2015

Indones. J. Chem.

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The modification of cellulose with 2-mercaptobenzhotiazole (MBT) through grafting and impregnating methods has been done. Modified cellulose used as adsorbent for Cu(II) ion in aqueous solution. The aims of research were modification cellulose with 3-chloropropyltrimethoxysilane and 2-mercaptobenzhotiazole (MBT), characterization of the modified cellulose with FTIR, SEM and XRD and adsorption study between cellulose-MBT adsorbent with Cu(II) ion in aqueous solution. The adsorbent of cellulose-MBT was synthesized by reflux process. Adsorption study between cellulose-MBT adsorbent with Cu(II) ion was investigated based on influence of pH solution, interaction time and initial concentration of Cu(II) ion. The result showed that activated cellulose can be modified with MBT to become cellulose-MBT adsorbent. The functional group of -C=N appeared at wavenumber 1658 cm -1 attributed to functional group of -C=N-is Schiff base of MBT. Presence functional group of S-H at cellulose-MBT adsorbent was not detected. The surface morphology of cellulose-MBT adsorbent after being interacted with Cu(II) ion was different before being interacted with Cu(II) ion. The diffractogram of cellulose-MBT adsorbent has similarity with cellulose-MBT adsorbent-Cu(II) ion. The optimum adsorption of Cu(II) ion was observed at pH 7.0 and 150 min of interaction time. Percentage of Cu(II) ion was absorbed by cellulose-MBT adsorbent tended to be constant after Cu(II) ion concentration 100 ppm. Keywords: modified cellulose; MBT; Cu(II) in aqueous solution ABSTRAK Telah dilakukan modifikasi selulosa dengan senyawa organik melalui metode penempelan dan impregnasi. Selulosa termodifikasi kemudian digunakan sebagai adsorben ion Cu(II) dalam larutan berair. Tujuan dari penelitian ini adalah modifikasi selulosa dengan 3-kloropropiltrimetoksisilen dan 2-merkaptobenzotiazol (MBT), karakterisasi selulosa termodifikasi menggunakan FTIR, SEM, XRD dan studi adsorpsi antara adsorben selulosa-MBT dengan ion Cu(II) dalam larutan berair. Adsorben selulosa-MBT disintesis dengan proses refluks. Eksperimen adsorpsi antara adsorben selulosa-MBT dengan ion Cu(II) dipelajari berdasarkan pengaruh pH larutan, waktu interaksi dan konsentrasi ion Cu(II). Hasil penelitian menunjukkan bahwa selulosa teraktivasi dapat dimodifikasi dengan senyawa organik menjadi adsorben selulosa-MBT. Gugus fungsi -C=N yang merupakan Basa

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Characterization of microcrystalline cellulose prepared from lignocellulosic materials. Part II: Physicochemical properties

Cited by 228 publications

References 22 publications

Characterization of Fibers from Pineapple's Crown, Rice Husks and Cotton Textile Residues

Characterization of Fibers from Pineapple's Crown, Rice Husks and Cotton Textile Residues

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

Synthesis, Characterization of Cellulose Modified with 2-Mercaptobenzothiazole and Its Adsorption To Cu(II) Ion in Aqueous Solution

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