Carboxymethyl cellulose with tailored degree of substitution obtained from bacterial cellulose

Casaburi, Agustina; Rojo, Úrsula María Montoya; Cerrutti, Patricia; Vázquez, Analı́a; Foresti, María Laura

doi:10.1016/j.foodhyd.2017.09.002

Cited by 114 publications

(90 citation statements)

References 34 publications

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“…After carboxymethylation, a broad peak at around 2θ = 20.8 • was observed. This was consistent with other observation that the modification process could influence the intermolecular and intramolecular hydrogen bonding, leading to an amorphous structure [28][29][30]. Due to the enhanced dispersion of modified cellulose, it is beneficial to be used as a filler in UF resin without agglomeration.…”

Section: Structural Characterization Of Modified Substratessupporting

confidence: 91%

Structures, Properties and Potential Applications of Corncob Residue Modified by Carboxymethylation

et al. 2020

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In this study, corncob residue (CR) valorization was simply and efficiently realized via carboxymethylation, and its enhanced performance as fillers in urea-formaldehyde (UF) resin was investigated. The structures of corncob residue and carboxymethylated derivative were analyzed by nuclear magnetic resonance (NMR), Fourier-transform infrared spectroscopy (FTIR), and Raman techniques, respectively. The thermal stability, morphology, viscosity control, and adhesive strength were then investigated to evaluate its performance as fillers in UF resin composite. Similar to commercial flour, carboxymethylated CR could effectively disperse in UF resin. It also exhibited a better initial viscosity control between 30 and 50 °C. The adhesive test analysis showed that the shear strength of resin with carboxymethylated CR addition could reach 1.04 MPa, which was comparable to flour (0.99 MPa) and significantly higher than raw CR (0.45 MPa). Moreover, a low formaldehyde emission was observed.

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Section: Structural Characterization Of Modified Substratessupporting

confidence: 91%

Structures, Properties and Potential Applications of Corncob Residue Modified by Carboxymethylation

et al. 2020

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“…Several attempts to surface functionalize BC by chemical routes have been reported [ 15 , 16 , 17 , 18 ]. Wet BC membranes were grafted with (3-aminopropyl)triethoxysilane (APTES) in ethanol and showed increased hydrophobicity and antibacterial properties [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…Dried BC membranes were grafted with two organosilanes, octadecyltrichlorosilane and APTES in hexane showing increased hydrophobicity in the first case and improved cell attachment and spreading in the case of APTES treatment [ 16 ]. Carboxymethylated cellulose was obtained starting from water suspension of BC, previously homogenized with a blender, which was solvent-exchanged to isopropanol and carboxymethylated [ 18 ]. The degree of substitution was tailored by controlling the reaction conditions.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Nanocellulose by Submerged Liquid Plasma for Surface Functionalization

et al. 2018

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Tailoring the surface properties of nanocellulose to improve the compatibility of components in polymer nanocomposites is of great interest. In this work, dispersions of nanocellulose in water and acetonitrile were functionalized by submerged plasmas, with the aim of increasing the quality of this reinforcing agent in biopolymer composite materials. Both the morphology and surface chemistry of nanocellulose were influenced by the application of a plasma torch and filamentary jet plasma in a liquid suspension of nanocellulose. Depending on the type of plasma source and gas mixture the surface chemistry was modified by the incorporation of oxygen and nitrogen containing functional groups. The treatment conditions which lead to nanocellulose based polymer nanocomposites with superior mechanical properties were identified. This work provides a new eco-friendly method for the surface functionalization of nanocellulose directly in water suspension, thus overcoming the disadvantages of chemical treatments.

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“…From the conductometric titration curves, degree of acetylation and degree of substitution can be calculated (Table-2). The higher degree of acetylation of N,O-carboxymethyl chitosan than chitosan indicates that that (-NH2) groups were also carboxy-methylated (Table-2) [34][35][36].…”

Section: Determination Of Degree Of Acetylation (Da) and Degree Of Sumentioning

confidence: 99%

Physico-Chemical Studies of Chitosan Derivatives and Optimization of Reaction Conditions using RSM Design

2019

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In this work, the chitosan flake was converted to carboxymethyl chitosan (CMCS) by carboxymethylation process using monochloroacetic acid in alkaline condition. The structure of carboxymethyl chitosan was confirmed by NMR, FT-IR, XRD, TGA and SEM techniques. The average molecular weight of carboxymethyl chitosan was obtained by viscometry method. The carboxymethylation reaction of chitosan was optimized for the reaction time, reaction temperature, amount of chitosan, amount of monochloroacetic acid. Response surface methodology (RSM) was used to analyze degree of substitution, degree of acetylation and yield with respect to reaction conditions. At the optimization reaction condition the degree of substitution, degree of acetylation (%) and yield (%) values are 0.56, 33.99 and 78.2, respectively.

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Carboxymethyl cellulose with tailored degree of substitution obtained from bacterial cellulose

Cited by 114 publications

References 34 publications

Structures, Properties and Potential Applications of Corncob Residue Modified by Carboxymethylation

Structures, Properties and Potential Applications of Corncob Residue Modified by Carboxymethylation

Treatment of Nanocellulose by Submerged Liquid Plasma for Surface Functionalization

Physico-Chemical Studies of Chitosan Derivatives and Optimization of Reaction Conditions using RSM Design

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