Ultrasound-assisted preparation of chitosan/nano-silica aerogel/tea polyphenol biodegradable films: Physical and functional properties

Wu, Zhijun; Li, Yang; Tang, Jing; Lin, Derong; Qin, Wen; Loy, Douglas A.; Zhang, Qing; Chen, Hong; Li, Suqing

doi:10.1016/j.ultsonch.2022.106052

Cited by 15 publications

(3 citation statements)

References 67 publications

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“…The refinement mechanisms of ultrasonic is mainly summarised as: ultrasonic cavitation broke dendrites and ultrasonic cavitation enhanced nucleation. Figure 12 shows a schematic diagram of the cavitation effect, where the cavitation bubbles in the Al melt undergo the process of growth, pulsate to eventually collapse during the ultrasonic treatment[29,30]. According to the literature[9,31], the moment of cavitation bubble breakage can generate high temperature and pressure, breaking the dendritic arms, and increasing pressure subcooling effect.…”

Section: Discussionmentioning

confidence: 99%

The microstructure and mechanical properties of 2219 alloy during ultrasonic treatment

Jiang

et al. 2023

Materials Science and Technology

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High-intensity ultrasonic melt treatment technique plays a key role in improving the performance of large-scale 2219 alloy ingot (Φ630 mm × 4500 mm). In this current paper, ultrasonic treatment-assisted casting techniques were developed and applied to manufacture large-scale 2219 aluminium (Al) alloy ingot in direct chill casting (DC). The industry-level experiments revealed that the α-Al grains of the ingot with ultrasonic (USDC) were refined, the area fraction of the coarse Al2Cu eutectic phase showed a decreasing trend, and the mechanical properties were lightly improved than without ultrasonic ingot (DC). Based on the present results and previous proposed hypotheses, the synergistic effects of cavitation and acoustic streaming were considered as the dominant mechanisms of USDC.

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Section: Discussionmentioning

confidence: 99%

The microstructure and mechanical properties of 2219 alloy during ultrasonic treatment

Jiang

et al. 2023

Materials Science and Technology

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“…Here, the high degradation with TiO 2(0.8) @SiO 2(0.2) @Starch composites may be due to the high electrical conductivity of TiO 2(0.8) @SiO 2(0.2) @Starch composites that delays recombination of •OH radicals. [37] The results of the sonocatalytic process indicate that the proposed sonocatalytic system could not efficiently mineralize the paracetamol under the explored experimental conditions.…”

Section: Effect Of Sonocatalysis Processmentioning

confidence: 94%

Nanostructured Composite of Starch/Silica Hybrid Decorated with Titanium Oxide Nanoparticles for Photocatalytic, Sonocatalytic, and Sonophotocatalytic

Tolba,

Hasanin,

Abdelhameed

2024

Starch Stärke

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Nanocomposite‐based heterostructure plays an important role in both industrial and advanced applications. A series of TiO2 nanoparticles decorated on silica/starch hybrid material (TiO2(x)@SiO2(x)@Starch nanocomposites) is synthesized using a facile sol–gel method. The intrinsic characteristics of the as‐prepared nanocomposites are studied using a variety of techniques. In this study, the degradation of paracetamol (PCT) is investigated in the presence of TiO2(x)@SiO2(x)@Starch nanocomposites. Photocatalysis and sonocatalysis systems are used separately and simultaneously in presence of sunlight and low‐power ultrasound. The adsorption results are essential factor in the degradation process. The non‐linear transform of the kinetics is further used to determine the characteristic parameters of TiO2(x)@SiO2(x)@Starch nanocomposites. The obtained results confirm that the experimental kinetic data follow the pseudo‐first order model in photocatalytic, sonocatalytic, and sonophotocatalytic processes but the rate constant of sonophotocatalysis is higher than the sum of it at photocatalysis and sonocatalysis process. This work develops a new sono‐photo active hybrid process for potential application in wastewater treatment. Additionally, the prepared TiO2 nanoparticles with silica/starch hybrid material perform antimicrobial activity. The antimicrobial activity is increased parallel with the TiO2 percent. The broad‐spectrum antimicrobial activity of nanocomposites is noticed at the highest percentage of TiO2 in TiO2(0.8)@SiO2(0.2)@Starch.

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“…There are different approaches to the methods of film formation, from common, conventional methods like dip coating, spin coating, spray methods, chemical vapor deposition, and tape casting [8] to more advanced methods like 3d printing [9,10], inkjet printing [9], and plasma spraying [11]. Chemical structure is one of the most important Gels 2024, 10, 394 2 of 13 factors in determining aerogel coating properties, with silica aerogels being the most widely studied and used.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Advanced Imaging Characterization of Magnetic Aerogel-Based Thin Films for Water Decontamination

Niculescu,

Mihaiescu,

Bîrcă

et al. 2024

Gels

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Aerogels have emerged as appealing materials for various applications due to their unique features, such as low density, high porosity, high surface area, and low thermal conductivity. Aiming to bring the advantages of these materials to the environmental field, this study focuses on synthesizing magnetic silica aerogel-based films suitable for water decontamination. In this respect, a novel microfluidic platform was created to obtain core-shell iron oxide nanoparticles that were further incorporated into gel-forming precursor solutions. Afterward, dip-coating deposition was utilized to create thin layers of silica-based gels, which were further processed by 15-hour gelation time, solvent transfer, and further CO2 desiccation. A series of physicochemical analyses (XRD, HR-MS FT-ICR, FT-IR, TEM, SEM, and EDS) were performed to characterize the final films and intermediate products. The proposed advanced imaging experimental model for film homogeneity and adsorption characteristics confirmed uniform aerogel film deposition, nanostructured surface, and ability to remove pesticides from contaminated water samples. Based on thorough investigations, it was concluded that the fabricated magnetic aerogel-based thin films are promising candidates for water decontamination and novel solid-phase extraction sample preparation.

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Ultrasound-assisted preparation of chitosan/nano-silica aerogel/tea polyphenol biodegradable films: Physical and functional properties

Cited by 15 publications

References 67 publications

The microstructure and mechanical properties of 2219 alloy during ultrasonic treatment

The microstructure and mechanical properties of 2219 alloy during ultrasonic treatment

Nanostructured Composite of Starch/Silica Hybrid Decorated with Titanium Oxide Nanoparticles for Photocatalytic, Sonocatalytic, and Sonophotocatalytic

Fabrication and Advanced Imaging Characterization of Magnetic Aerogel-Based Thin Films for Water Decontamination

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