Influence of sonication treatment on supramolecular cellulose microfibril-based hydrogels induced by ionic interaction

Masruchin, Nanang; Park, Byung‐Dae; Causin, Valerio

doi:10.1016/j.jiec.2015.03.034

Cited by 37 publications

(16 citation statements)

References 34 publications

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“…Repetitive freeze-thaw processes favor microcrystals formation in the polymer structure, have no toxicity issues and do not generate harmful chemical residues. 45 Charged polymers can be crosslinked in presence of multivalent ions of opposite charge by electrostatic interaction; 46 one classical example is the gelation of alginate in the presence of Ca 2+ ions. Gelatin is an example of physical hydrogel from our everyday life formed by hydrogen bonds among the macromolecules; it is stable under low temperature, but at high temperature, the H bonds are disrupted, and the gel structure is lost.…”

Section: Physical Crosslinkingmentioning

confidence: 99%

Magneto-Responsive Hydrogels: Preparation, Characterization, Biotechnological and Environmental Applications

Frachini¹,

Petri²

2019

J. Braz. Chem. Soc.

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Hydrogels are hydrophilic three-dimensional networks able to hold large amount of water and hydrophilic molecules. Magneto-responsive hydrogels comprise of magnetic nanoparticles dispersed in polymeric networks that can be manipulated under external magnetic field. This review aims at (i) giving a brief overview on the evolution of hydrogels until the design and development of magnetic hydrogels; (ii) describing the types of hydrogels and the basic concepts about superparamagnetic iron oxide nanoparticles, as well as the preparation and characterization of magneto-responsive hydrogels; (iii) displaying the relevant applications of magneto-responsive hydrogels for drug delivery, regenerative medicine of tissues, cancer therapy and environmental issues and (iv) highlighting the challenges and future trends of magneto-responsive hydrogels for 3D and 4D printing.

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Section: Physical Crosslinkingmentioning

confidence: 99%

Magneto-Responsive Hydrogels: Preparation, Characterization, Biotechnological and Environmental Applications

Frachini¹,

Petri²

2019

J. Braz. Chem. Soc.

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“…TEMPO-cellulose nanofibril (TCNF) obtained by 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)mediated oxidation has gained popularity in the field of bio-nanomaterials applications [1][2][3][4][5][6][7], due to the regioselective surface modification of cellulose which promote large amounts of anionically charged sodium carboxylate that may cause the individualization of cellulose microfibrils by electrostatic repulsion and/or osmotic effects in water, therefore reducing the energy consumption for nanocellulose isolation. Isogai et al (2011) [8] reported the required energy was below 7 MJ.Kg -1 of cellulose with yield above than 90%.…”

Section: Surface Modification Of Tempo-mediated Cellulose Nanofibril mentioning

confidence: 99%

“…The carboxyl content of TCNF was measured by the conductometric titration method [6]. The 80 mL cellulose suspension with 0.05% solid content was stirred continually with addition of 5 mL 0.01 M NaCl while the pH of the suspension was adjusted to 2.5-3 by addition of 0.1 M HCl.…”

Section: Conductometric Titrationmentioning

confidence: 99%

Surface Modification of Tempo-Mediated Cellulose Nanofibril With Octadecylamine

Masruchin

Nuryawan

Kusumaningrum

et al. 2019

jsmi

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SURFACE MODIFICATION OF TEMPO-MEDIATED CELLULOSE NANOFIBRIL WITH OCTADECYLAMINE. In this study, surface modification of 2,2,6,6-tetramethylpiperidine-1-oxyl radical TEMPO-cellulose nanofibrils (TCNF) was obtained by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS)-mediated system. The carboxylate groups on TCNF surface was replaced by conjugation of octadecylamine (ODA). The conversion of the carboxylate groups on CNF into amide I and II groups was confirmed by attenuated transform reflectance-infrared (ATR-FTIR) and elemental analysis study. Further, decarboxylation of TCNF at higher temperature was hindered by the presence of amide groups resulted in the higher thermal stability of TCNF as observed by thermogravimetry analysis (TGA). These results suggested the possibility of modifying surface negatively charged of TCNF with conjugated amine groups into thermally stable nanocellulose.

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“…Mechanical processes such as high-pressure homogenization, ultrasonication, cryo crushing, and microfluidization, involve a high energy consumption needed to disintegrate the cellulose microfibrils (Ferrer et al, 2012;Masruchin et al, 2015;Soni et al, 2015). Steam explosion treatment and chemical pretreatment such as oxidation basic-acid hydrolysis followed by a mechanical treatment can decrease the energy consumption (Lu et al, 2010;Li et al, 2015;Dahlem et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Preparation of Surface-Modified Nanocellulose from Sugarcane Bagasse by Concurrent Oxalic Acid-Catalyzed Reactions

Sriruangrungkamol¹,

Wongjaiyen²,

Brostow³

et al. 2020

CMUJNS

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Concurrent oxalic acid-catalyzed reactions, including cellulose hydrolysis and esterification of the hydrolyzed cellulose, were performed to prepare the nanocellulose from sugarcane bagasse. Hydrothermal hydrolysis at 100 o C in a microwave digester was performed using oxalic acid at the concentrations of 0, 5, 10, and 30%w/v as catalysts. The hydrolyzed cellulose so obtained was characterized by several techniques, including FTIR, TGA, XRD, and viscosity measurements. The concentration of oxalic acid slightly affects the thermal stability, crystallinity, and molecular weight of the hydrolyzed cellulose. Apart from acting as a catalyst, oxalic acid at 10 or 30%w/v could react with OH groups of the cellulose by esterification. After mechanical homogenization, microfibrils of hydrolyzed cellulose were separated. The SEM results show a web-like network structure of the mixture of cellulose fibrils (CNFs) and fibril aggregates-indicating the nanofiber form of nanocellulose. The dispersion stability of the suspensions in deionized water and organic solvents (dimethyl formamide (DMF) and acetone) increases with increasing concentration of oxalic acid for hydrolysis-as seen in the presence of oxalate groups on the surfaces of CNFs. Thus, the microwaveassisted oxalic acid hydrolysis, followed by the homogenization of cellulose provides a potential method for the production of surface-modified CNFs.

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Influence of sonication treatment on supramolecular cellulose microfibril-based hydrogels induced by ionic interaction

Cited by 37 publications

References 34 publications

Magneto-Responsive Hydrogels: Preparation, Characterization, Biotechnological and Environmental Applications

Magneto-Responsive Hydrogels: Preparation, Characterization, Biotechnological and Environmental Applications

Surface Modification of Tempo-Mediated Cellulose Nanofibril With Octadecylamine

Preparation of Surface-Modified Nanocellulose from Sugarcane Bagasse by Concurrent Oxalic Acid-Catalyzed Reactions

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