Carboxymethylcellulose from bleached organosolv fibers of Eucalyptus nitens: synthesis and physicochemical characterization

Yáñez-S, Mauricio; Matsuhiro, Betty; Maldonado, Santiago Niño; González, Raúl; Luengo, Jorge; Uyarte, Omar; Serafine, Daniel; Moya, Sergio A.; Romero, Julio; Torres, Rodrigo; Kogan, Marcelo J.

doi:10.1007/s10570-018-1766-7

Cited by 33 publications

(14 citation statements)

References 44 publications

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“…Bands at 1610 and 1393 cm −1 are due to asymmetric and symmetric COO-vibrations, respectively [38,39]. At 3360 cm −1 , CMC and MOF-5–CMC exhibit -OH stretching bands, but this band is weak in the spectrum of MOF-5, which illustrates that the -OH stretching bands are mainly due to the presence of CMC [40,41]. In addition, CMC and MOF-5–CMC exhibited -CH 2 stretching absorptions at 2950 cm −1 , but the band corresponding to MOF-5–CMC was weaker than that of CMC [42].…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Carboxymethylcellulose/Metal-Organic Framework Beads for Removal of Pb(II) from Aqueous Solution

Jin

Wang

et al. 2019

Materials

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The ability to remove toxic heavy metals, such as Pb(II), from the environment is an important objective from both human-health and ecological perspectives. Herein, we describe the fabrication of a novel carboxymethylcellulose-coated metal organic material (MOF-5–CMC) adsorbent that removed lead ions from aqueous solutions. The adsorption material was characterized by Fourier-transform infrared spectroscopy, X-ray diffractometry, scanning electron microscopy, and X-ray photoelectron spectroscopy. We studied the functions of the contact time, pH, the original concentration of the Pb(II) solution, and adsorption temperature on adsorption capacity. MOF-5–CMC beads exhibit good adsorption performance; the maximum adsorption capacity obtained from the Langmuir isotherm-model is 322.58 mg/g, and the adsorption equilibrium was reached in 120 min at a concentration of 300 mg/L. The adsorption kinetics is well described by pseudo-second-order kinetics, and the adsorption equilibrium data are well fitted to the Langmuir isotherm model (R2 = 0.988). Thermodynamics experiments indicate that the adsorption process is both spontaneous and endothermic. In addition, the adsorbent is reusable. We conclude that MOF-5–CMC is a good adsorbent that can be used to remove Pb(II) from aqueous solutions.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Carboxymethylcellulose/Metal-Organic Framework Beads for Removal of Pb(II) from Aqueous Solution

Jin

Wang

et al. 2019

Materials

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“…•100 (4) The obtained LDP were further characterized as described below. For IL recovery, water was removed from the liquid phase by evaporation.…”

Section: Variables Employed To Characterize the Separation And Recovementioning

confidence: 99%

“…Eucalyptus is the most widely planted type of hardwoods and can be produced at relatively low cost [2]. Although the most important Eucalyptus species in terms of world plantations are E. grandis, E. urophylla, E. camaldulensis, and E. globulus, growing attention is being paid to E. nitens, owing to their decreased susceptibility to Gonipterus plagues and to its ability to resist a wide range of environmental conditions, i.e., altitudes between 600 and 1600 m, with moderate temperatures in summer and cold temperatures, frost and snow in winter [3,4]. Because of this, E. nitens is an interesting raw material for lignocellulose biorefineries, conceived as integrated industrial facilities enabling the separation of the major feedstock components and their separate processing.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Eucalyptus nitens Lignins Obtained by Biorefinery Methods Based on Ionic Liquids

et al. 2020

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Eucalyptus nitens wood samples were subjected to consecutive stages of hydrothermal processing for hemicellulose solubilization and delignification with an ionic liquid, i.e., either 1-butyl-3-methylimidazolium hydrogen sulfate or triethylammonium hydrogen sulfate. Delignification experiments were carried out a 170 °C for 10–50 min. The solid phases from treatments, i.e., cellulose-enriched solids, were recovered by centrifugation, and lignin was separated from the ionic liquid by water precipitation. The best delignification conditions were identified on the basis of the results determined for delignification percentage, lignin recovery yield, and cellulose recovery in solid phase. The lignins obtained under selected conditions were characterized in deep by 31P-NMR, 13C-NMR, HSQC, and gel permeation chromatography. The major structural features of the lignins were discussed in comparison with the results determined for a model Ionosolv lignin.

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“…27,33 Two intense absorption bands at around 1604 cm −1 and 1419 cm −1 can be seen in CMC A , CMC B , CMCNFs and CMCNCs FTIR spectra, corresponding to the COO − (carboxylate group, pink parts in Figure 2(a)). 34 The characteristic peaks located between 1250 cm −1 and 900 cm −1 (yellow part in Figure 2(a)) are attributed to C-O stretching and C-O-C, C-C-O bending vibration, respectively, representing the unique pattern for polysaccharides. 35 Additionally, the intensely broad absorption band at 3350 cm −1 is assigned to O-H stretching vibrations (blue part in Figure 2 CMCNCs, broader band appears in CMC A and CMC B spectra due to water absorption from air.…”

Section: Characterization Of Cmc a Cmc B Cmcnfs And Cmcncsmentioning

confidence: 99%

“…We also find the bands between 1250 cm −1 and 900 cm −1 are assigned to C-O stretching and C-O-C, C-C-O bending vibration, respectively (yellow part in Figure 5(a)). 34 Thermal degradation behavior of pure CMC film, CMC/CMCNFs (4 wt%) and CMC/CMCNCs (4 wt%) composite films are reflected by TG/DTG curves ( Figure 5(b)). We observed that T onset of CMC, CMC/ CMCNFs and CMC/CMCNCs films are 56 C, 70 C, and 78 C, respectively.…”

Section: Thermal Stability and Light Transmittance Of Cmc/cmcnfs Anmentioning

confidence: 99%

Preparation of treelike and rodlike carboxymethylated nanocellulose and their effect on carboxymethyl cellulose films

Wei

Jia

Zhang

et al. 2020

J of Applied Polymer Sci

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In this work, carboxymethyl cellulose (CMC) with low substitution degree, followed by different posttreatments, was applied to prepare treelike CMC nanofibrils (CMCNFs) and rodlike CMC nanocrystals (CMCNCs), and their performance in CMC composite film was evaluated simultaneously. From transmission electron microscopy results, it was found that the treelike CMCNCFs exhibited a lager aspect ratio compared to the rodlike CMCNCs. As for reinforcing CMC film, 4 wt% was the best adding amount, at this time, the tensile strength of CMC/CMCNFs and CMC/CMCNCs composite films was increased by 72.1% and 47.3%, respectively. Moreover, adding these nanofillers to CMC also could enhance the thermal stability of composite films slightly, while the transmittance of composite films was reduced at the same time. In addition, CMC/CMCNFs film was designed as a packaging box to determine its performance. Therefore, this study could reveal the differences of properties for composites with different types of nanocellulose and provide a foundation for further application of nanocellulose.

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Carboxymethylcellulose from bleached organosolv fibers of Eucalyptus nitens: synthesis and physicochemical characterization

Cited by 33 publications

References 44 publications

Fabrication of Carboxymethylcellulose/Metal-Organic Framework Beads for Removal of Pb(II) from Aqueous Solution

Fabrication of Carboxymethylcellulose/Metal-Organic Framework Beads for Removal of Pb(II) from Aqueous Solution

Characterization of Eucalyptus nitens Lignins Obtained by Biorefinery Methods Based on Ionic Liquids

Preparation of treelike and rodlike carboxymethylated nanocellulose and their effect on carboxymethyl cellulose films

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