Determination of absorption and structural properties of cellulose-based hydrogel via ultrasonic pulse-echo time-of-flight approach

Lamanna, Leonardo; Rizzi, Francesco; Demitri, Christian; Pisanello, Marco; Scarpa, Elisa; Qualtieri, Antonio; Sannino, Alessandro; Vittorio, Massimo De

doi:10.1007/s10570-018-1874-4

Cited by 10 publications

(8 citation statements)

References 33 publications

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“…Ultrasound is considered a promising and eco‐friendly alternative for the pretreatment of lignocellulosic biomass, consisting of the process of transmitting energy in the form of sound waves (mechanical) into the extraction system 19–21 . The main effect of ultrasound on the extraction of plant matrices is increased cell wall permeability, which facilitates the dilatation and hydration of the material by increasing the pore size of the cell wall, improving the process of diffusion and mass transfer, and resulting in higher extraction yields and the reduction of extraction time 22–26 …”

Section: Introductionmentioning

confidence: 99%

“…[19][20][21] The main effect of ultrasound on the extraction of plant matrices is increased cell wall permeability, which facilitates the dilatation and hydration of the material by increasing the pore size of the cell wall, improving the process of diffusion and mass transfer, and resulting in higher extraction yields and the reduction of extraction time. [22][23][24][25][26] Peracetic acid (PA) is a strong oxidizing agent with excellent bleaching properties suitable for the extraction of cellulose, as it has low environmental impact when compared to that of the chlorinated reagents employed in conventional processes used for cellulose extraction. PA decomposes during bleaching into nontoxic and antimicrobial decomposition products.…”

Section: Introductionmentioning

confidence: 99%

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Environmentally friendly process based on a combination of ultrasound and peracetic acid treatment to obtain cellulose from orange bagasse

Marim

Mantovan

Giraldo

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND Brazil is responsible for 60% of the global production of orange juice, accounting for over three‐quarters of global orange juice exports, resulting in large quantities of orange bagasse (OB). This is an underutilized byproduct of the orange juice industry and corresponds to 50% of the fruit weight. The objectives of this study were to produce cellulose from OB using a combination of ultrasound and peracetic acid (PA) treatment, and to characterize the obtained materials according to their microstructure, crystallinity, thermal stability and water sorption behavior, and their cellulose, hemicellulose and lignin contents. RESULTS Ultrasound pretreatment alone was not effective in altering the composition of OB. Samples subjected to both ultrasound and PA presented higher cellulose contents and lower hemicellulose and lignin contents in comparison to their respective samples undergoing PA treatment alone. The sample subjected to ultrasound for 10 min at a 30% amplitude combined with PA treatment for 24 h (USPA.24) resulted in the highest crystallinity index (54%), with 81.49% cellulose, 0.88% hemicellulose and 2.68% lignin. The increase in cellulose content of samples also resulted in lower water‐holding capacity, solubility and water adsorption capacity of samples. CONCLUSION Ultrasonication associated with PA treatment can be considered a promising approach and effective protocol for the extraction of cellulose from lignocellulosic residues, and it has the advantages of simplicity and environmental friendliness when compared to conventional methods, reducing the toxicity and amount of the resulting effluents. © 2020 Society of Chemical Industry (SCI)

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Environmentally friendly process based on a combination of ultrasound and peracetic acid treatment to obtain cellulose from orange bagasse

Marim

Mantovan

Giraldo

et al. 2020

J of Chemical Tech & Biotech

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“…This may be due to the decrease in molecular weight with increasing NaOH reaction time ( Table 1 ). Short molecular chains hardly generate a bulk hydrogel but lead to just an increase in viscosity [ 6 ]. The swelling capacity of CMC-0 h hydrogels was recorded and reported in Figure 4 a.…”

Section: Resultsmentioning

confidence: 99%

“…CMC shows the ability to suspend solids in aqueous media, stabilize emulsions, absorb moisture from the atmosphere, and is mainly used as a thickener, suspending aid, binder, gelling agent, stabilizer, and water retention agent, etc. [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Carboxymethylcellulose-Based Hydrogel Obtained from Bacterial Cellulose

et al. 2023

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In the present study, we have produced a sodium carboxymethylcellulose (CMC) hydrogel from a bacterial cellulose etherification reaction with chloroacetic acid in an alkaline medium. Bacterial cellulose (BC) was synthesized via economical and environmentally friendly methods using the Gluconacetobacter xylinus bacterium. After purification, freeze-drying, and milling, BC microparticles were dispersed in NaOH solution for different time periods before the etherification reaction. This has allowed the understanding of the alkalinization effect on BC modification. All synthesized CMC were soluble in water, and FTIR and XRD analyses confirmed the etherification reaction. The bath of BC in NaOH solution affects both molecular weight and degree of substitution. SEM analysis revealed the change of BC microstructure from fibrous-like to a smooth, uniform structure. The CMC-0 h allowed the production of crosslinked hydrogel after dehydrothermal treatment. Such hydrogel has been characterized rheologically and has shown a water absorption of 35 times its original weight. The optimization of the CMC produced from BC could pave the way for the production of ultrapure hydrogel to be applied in the healthcare and pharmaceutical industry.

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“…The investigation of protein solutions and hydrogels by ultrasonic propagation has been performed by a series of research studies [16][17][18][19][20][21]. In fact, the sound speed and the acoustic wave damping can be used to provide information about protein hydration in an aqueous environment and their conformational changes or phase transformations induced by the external stimuli [22].…”

Section: Introductionmentioning

confidence: 99%

Probing Globular Protein Self-Assembling Dynamics by Heterodyne Transient Grating Experiments

et al. 2019

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In this work, we studied the propagation of ultrasonic waves of lysozyme solutions characterized by different degrees of aggregation and networking. The experimental investigation was performed by means of the transient grating (TG) spectroscopy as a function of temperature, which enabled measurement of the ultrasonic acoustic proprieties over a wide time window, ranging from nanoseconds to milliseconds. The fitting of the measured TG signal allowed the extraction of several dynamic properties, here we focused on the speed and the damping rate of sound. The temperature variation induced a series of processes in the lysozyme solutions: Protein folding-unfolding, aggregation and sol–gel transition. Our TG investigation showed how these self-assembling phenomena modulate the sound propagation, affecting both the velocity and the damping rate of the ultrasonic waves. In particular, the damping of ultrasonic acoustic waves proved to be a dynamic property very sensitive to the protein conformational rearrangements and aggregation processes.

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Determination of absorption and structural properties of cellulose-based hydrogel via ultrasonic pulse-echo time-of-flight approach

Cited by 10 publications

References 33 publications

Environmentally friendly process based on a combination of ultrasound and peracetic acid treatment to obtain cellulose from orange bagasse

Environmentally friendly process based on a combination of ultrasound and peracetic acid treatment to obtain cellulose from orange bagasse

Carboxymethylcellulose-Based Hydrogel Obtained from Bacterial Cellulose

Probing Globular Protein Self-Assembling Dynamics by Heterodyne Transient Grating Experiments

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