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Journal articles on the topic 'Sonication time'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Rucins, Martins, Oksana Petricenko, Karlis Pajuste, et al. "Studies of Preparation and Stability of Liposomes Formed by 1,1'-[(3,5-didodeciloxycarbonyl-4-phenyl-1,4-dihydropyridine-2,6-diil)-dimethylen]Bispyridinium Dibromide." Advanced Materials Research 787 (September 2013): 157–62. http://dx.doi.org/10.4028/www.scientific.net/amr.787.157.

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In this work we describe the studies of preparation and stability of liposomes formed by 1,1'-[(3,5-didodeciloxycarbonyl-4-phenyl-1,4-dihydropyridine-2,6-diil) dimethylebispyridinium dibromide, novel lipid-like compound. The influence of the amount of amphiphilic compound, solvent and sonication time was studied. Liposomes were prepared by dispersing of compound in the corresponding media at a selected concentration by sonication using a probe type sonicator and characterised by atomic force microscopy (AFM) and dynamic light scattering (DLS) methods.

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2

Campaniello, Daniela, Antonio Bevilacqua, Milena Sinigaglia, and Maria Rosaria Corbo. "Using homogenization, sonication and thermo-sonication to inactivate fungi." PeerJ 4 (June 28, 2016): e2020. http://dx.doi.org/10.7717/peerj.2020.

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Ultrasound (US), Thermo-sonication (TS) and High Pressure Homogenization (HPH) were studied as tools to inactivate the spores ofPenicilliumspp. andMucorspp. inoculated in distilled water. For US, the power ranged from 40% to 100%, pulse from 2 to 10 s, and duration of the treatment from 2 to 10 min. TS was performed combining US (40–80% of power, for 8 min and pulse of 2 s) with a thermal treatment (50, 55 and 60°C at 4, 8 and 12 min). Homogenization was done at 30–150 MPa for 1, 2 and 3 times. Power was the most important factors to determine the antifungal effect of US and TS towards the con

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3

Rennhofer, Harald, and Benjamin Zanghellini. "Dispersion State and Damage of Carbon Nanotubes and Carbon Nanofibers by Ultrasonic Dispersion: A Review." Nanomaterials 11, no. 6 (2021): 1469. http://dx.doi.org/10.3390/nano11061469.

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Dispersion of carbon nanotubes and carbon nanofibers is a crucial processing step in the production of polymer-based nanocomposites and poses a great challenge due to the tendency of these nanofillers to agglomerate. Besides the well-established three-roll mill, the ultrasonic dispersion process is one of the most often used methods. It is fast, easy to implement, and obtains considerably good results. Nevertheless, damage to the nanofibers due to cavitation may lead to shortening and changes in the surface of the nanofillers. The proper application of the sonicator to limit damage and at the

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4

Dunnivant, Frank M., and Alan W. Elzerman. "Determination of Polychlorinated Biphenyls in Sediments, Using Sonication Extraction and Capillary Column Gas Chromatography-Electron Capture Detection with Internal Standard Calibration." Journal of AOAC INTERNATIONAL 71, no. 3 (1988): 551–56. http://dx.doi.org/10.1093/jaoac/71.3.551.

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Abstract A sonication technique is presented for the extraction of polychlorinated biphenyls (PCBs) from sediments. In addition, a quantitation scheme is described which allows peak-specific and, in many cases, congener-specific determination of PCBs. PCBs are quantitated by capillary column gas chromatography-electron capture detection, with internal standard calibration. Results utilizing sonication extraction were compared with those obtained by Soxhlet and steam distillation extractions of 3 U.S. Environmental Protection Agency (EPA) quality control sediment samples and 3 lake sediments kn

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Shi, Zengqian, Zhiyong Cai, Siqun Wang, Qixin Zhong, and Joseph J. Bozell. "Short-time ultrasonication treatment in enzymatic hydrolysis of biomass." Holzforschung 67, no. 8 (2013): 891–97. http://dx.doi.org/10.1515/hf-2013-0024.

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Abstract To improve the conversion of enzymatic hydrolysis of biomass in an energy-efficient manner, two short-time ultrasonication strategies were applied on six types of biomass with different structures and components. The strategies include pre-sonication before the hydrolysis and intermittent sonication during the ongoing hydrolysis. The microstructures of each type of biomass were characterized by scanning electron microscopy to investigate the potential correlation between biomass structure and ultrasonicaton. The concentration of resultant reducing sugar was measured to evaluate the ef

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Adeyinka, Adegbola, A. A. Dare, D. S. Popoola, H. A. Saka, and A. O. Afolabi. "Experimental investigation of enhanced remediation of contaminated soil using ultrasound effect." International Journal of Engineering & Technology 3, no. 3 (2014): 322. http://dx.doi.org/10.14419/ijet.v3i3.1103.

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In the development of an effective ground remediation method, there has been significant research focusing on the technique of enhancing soil-flushing method The soil flushing method enhanced by ultrasonic waves is a new technique that is potentially an effective method for in situ remediation of the ground contaminated by NAPL hydrocarbons. The research work investigated the effectiveness of sonication in the soil flushing method for a range of conditions involving treatment time, hydraulic gradient and the discharge velocity. The experimental investigation of the study was conducted using th

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7

Das, Shawtik, Raja Pandey, Tuphan Devkota, and Charles Chusuei. "Raman Spectroscopy as an Assay to Disentangle Zinc Oxide Carbon Nanotube Composites for Optimized Uric Acid Detection." Chemosensors 6, no. 4 (2018): 65. http://dx.doi.org/10.3390/chemosensors6040065.

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Refluxed zinc oxide (ZnO) nanoparticles (NPs) were prepared and attached to carboxylic acid functionalized multi-walled carbon nanotubes (COOH-MWNTs) via sonication. Practical optimization of electrocatalysts using sonication to disentangle a carbon nanotube composite for monitoring uric acid (UA) is shown. Monitoring UA is important for the management of medical disorders. Selection of sonication time is a crucial step in producing the desired composite. We report, for the first time, the practical use of Raman spectroscopy to tune the sonication involved in tethering ZnO NPs to the multi-wal

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8

Adinoyi, M. J., Necar Merah, Zuhair M. Gasem, and N. Al-Aqeeli. "Effect of Sonication Time and Clay Loading on Nanoclay Dispersion and Thermal Property of Epoxy-Clay Nanocomposite." Key Engineering Materials 471-472 (February 2011): 490–95. http://dx.doi.org/10.4028/www.scientific.net/kem.471-472.490.

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The development of nanoclay-epoxy nanocomposite material requires a suitable blending process to be employed. Amongst blending techniques, sonication has been one of the promising means for polymer-clay nanocomposite fabrication. In this study, epoxy-clay nanocomposites with 2, 4 and 5% clay loadings were fabricated using different sonication periods ranging from 5 to 60 minutes. The effect of sonication time and clay loading on the nanocomposite structure was investigated using Differential Scanning Calorimetry (DSC), X-ray diffraction (XRD), Scanning Electron Micropscope (SEM) and Energy Dis

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9

Zhang, Guangming, Tian Wan, Feng Gao, and Haifeng Lu. "SOLUBILIZATION OF HEAVY METALS IN SLUDGE DURING SONICATION: IMPACT OF SONICATION TIME AND POWER DENSITY." Environmental Engineering and Management Journal 13, no. 10 (2014): 2625–32. http://dx.doi.org/10.30638/eemj.2014.293.

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10

Srivastava, S. K., and I. P. Singh. "Mechanical Properties of Glass Fibre-Epoxy Based Polymer Nanocomposites." Journal of Nano Research 15 (September 2011): 41–49. http://dx.doi.org/10.4028/www.scientific.net/jnanor.15.41.

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The experimental studies are conducted in this paper to optimize the three parameters for development of nanocomposite, namely (i) clay loadings, (ii) magnetic stirring time, and (iii) sonication time. Firstly polymer nanocomposites of varying contents nanoclay were prepared by using a mechanical stirrer and an ultrasound sonicator. The weight percentage of nanoclay in the nanocomposite with fixed stirring and sonication time was optimized for maximum intercalation within the polymer. After optimization of clay percentage, glass fiber based epoxy nanocomposite laminates were prepared. Nanocomp

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11

Say, Sreypich, Nathaniel Dugos, Susan Roces, and John Martin Mondragon. "Effect of sonication power on perfusion decellularization of cadaveric porcine kidney." MATEC Web of Conferences 268 (2019): 01009. http://dx.doi.org/10.1051/matecconf/201926801009.

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Kidney problems rank 7th among the top 10 causes of mortality among Filipinos. One of the potential future treatment options is the use of bioengineered kidney. The preparation of scaffolds is the first step in kidney bioengineering and perfusion decellularization using chemicals is considered the most preferred preparation method to date. However, the use of chemicals alone requires long treatment time hence, in this study perfusion decellularization is to be enhanced by sonication treatment at varying sonication power. Decellularization was carried out by perfusing the kidney with 1% SDS and

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Zhang, Dong Dong, Dong Lin Zhao, and Bin He. "Effect of Graphene Structure on Mechanical Properties of Graphene/Epoxy Nanocomposites." Advanced Materials Research 873 (December 2013): 496–502. http://dx.doi.org/10.4028/www.scientific.net/amr.873.496.

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Graphene nanosheets (GNSs) were mass-produced from flake natural graphite by oxidation, rapid expansion and ultrasonic treatment. The effects of ultrasonic times on the morphology and structure of GNSs and mechanical properties of GNS/epoxy nanocomposites were systematically investigated. GNS/epoxy nanocomposites were fabricated by ultrasonication and cast molding method. The mechanical properties of GNS/epoxy nanocomposites were influenced by the specific surface area, layer stacking and oxygen-containing functional group contents of GNSs. GNSs had excellent exfoliation degree when the sonica

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Alex John Thangapaul, A., V. Sherly Arpuda Kiruba, R. Nivea, et al. "Nanorods of Cobalt Oxide: Study on its Morphology with Varied Sonication Time." Advanced Materials Research 678 (March 2013): 203–6. http://dx.doi.org/10.4028/www.scientific.net/amr.678.203.

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Nanomaterials research has become a major attraction in the field of advanced materials research in the area of Physics, Chemistry, and Materials Science. Biocompatible and chemically stable magnetic metal oxide nanoparticles have biomedical applications that includes drug delivery, cell and DNA separation, gene cloning, magnetic resonance imaging (MRI). This research is aimed at the fabrication of magnetic cobalt oxide nanoparticles using a safe, cost effective, and easy to handle technique that is capable of producing nanoparticles free of any contamination. Nanostructured Cobalt oxide powde

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14

Gasem, Zuhair M., Necar Merah, M. J. Adinoyi, and Zafarullah Khan. "The Effects of Clay Content and Sonication Time on Water Uptake in Epoxy-Organoclay Nanocomposites." Advanced Materials Research 445 (January 2012): 509–13. http://dx.doi.org/10.4028/www.scientific.net/amr.445.509.

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The effects of clay loading and the extent of sonication time on water uptake in epoxy-organoclay based nanocomposites have been investigated as a function of exposure time in 3.5% NaCl at room temperature. Three clay loadings (2%, 4%, and 5wt.%) were dispersed in the epoxy resin by 10 and 60 minute sonication. The weight gains in the neat epoxy and the nanocomposites with 2 wt.% and 4 wt.% clay loadings showed a common asymptotic saturation value of 0.72 wt.% after 1000 hours of exposure. The saturation value was independent of sonication time. Nanocomposite with 5% clay loading and 60 minute

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15

Adinoyi, M. J., Necar Merah, Zuhair M. Gasem, and N. Al-Aqeeli. "Variation of Mechanical Properties of Epoxy-Clay Nanocomposite with Sonication Time and Clay Loading." Key Engineering Materials 471-472 (February 2011): 496–501. http://dx.doi.org/10.4028/www.scientific.net/kem.471-472.496.

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Epoxy-clay nanocomposites have recently gained considerable attention due to their interesting physical, thermal and mechanical properties. These properties, however, depend on a number of parameters such as the clay type, clay modifying agent, polymer matrix and the adopted mixing process. In the current work, epoxy-clay nanocomposites were prepared from Araldite GY6010 CRS and Nanomer I.30E nanoclay using different sonication (mixing) periods (5 to 60 minutes) and different concentrations of clay (2 to 5%wt). The effect of sonication time and clay loading on the tensile and hardness properti

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Yu, Zai, Shi Chuan Tang, Peng Zhao, Ru Gang Zhong, and Bing Chang. "Dispersion and Stability of Nanoalumina in Solution Prior to Exposure." Advanced Materials Research 850-851 (December 2013): 16–19. http://dx.doi.org/10.4028/www.scientific.net/amr.850-851.16.

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Dispersion of nanoalumina in normal saline (NS) and phosphate buffered saline (PBS) was studied. The effects of different dispersing methods were investigated. The results showed nanoalumina was better dispersed in NS than PBS. And sonication was a more effective method that helped deaggregation compared with vortex oscillation. Finally, the influence of sonication time on the particle size and the stability of the sonicated NS suspension were studied using dynamic light scattering. The aggregation size was decreased to about 130 nm after ten-minute sonication and maintained when increasing so

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17

Dalkilic, Ahmet Selim, Bedri Onur Küçükyıldırım, Ayşegül Akdoğan Eker, et al. "Effects of Sonication Time on the Stability and Viscosity of Functionalized MWCNT-Based Nanolubricants." Current Nanoscience 16, no. 4 (2020): 639–54. http://dx.doi.org/10.2174/1573413715666190710161617.

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Background: Active scholars in the nanofluid field have continuously attempted to remove the associated challenge of the stability of nanofluids via various approaches, such as functionalization and adding a surfactant. After preparing a stable nanofluid, one must measure the properties, as this is vital in the design of thermal systems. Objective: Authors aimed to investigate the stability and viscosity of refrigeration lubrication oilbased nanofluids containing functionalized MWCNTs. The effects of concentration and temperature on viscosity were studied. Furthermore, the present study focuse

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18

Shah, Syed Sajid Ali, and Habib Nasir. "Liquid-Phase Exfoliation of Few-Layer Graphene and Effect of Sonication Time on Concentration of Produced Few Layer Graphene." Nano Hybrids and Composites 14 (March 2017): 17–24. http://dx.doi.org/10.4028/www.scientific.net/nhc.14.17.

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Although graphene has been produced by various methods at lab scale, however, its cost effective mass production method is still a challenge. Graphene has been produced by liquid phase exfoliation, which is the most probable method for commercial production of graphene for various industrial applications.This paper reports high concentration production of few-layer graphene in DMSO (dimethyl sulfoxide) as solvent through liquid phase exfoliation assisted with sonication. The temperature was kept below 30oC. SEM, AFM, and XRD were used to characterize the produced graphene. SEM results confirm

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Caretti, C., E. Coppini, E. Fatarella, and C. Lubello. "Membrane filtration and sonication for industrial wastewater reuse." Water Science and Technology 64, no. 12 (2011): 2500–2507. http://dx.doi.org/10.2166/wst.2011.800.

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This paper presents an experimental study aimed at estimating the efficiency of the innovative process of ultrafiltration (UF) combined with sonication (Son.) for the refinement of treated effluent to be reused in wet textile processes. Such a novel approach, which has not yet been employed on a full industrial scale, has been experienced at pilot scale on the secondary effluent of the Baciacavallo wastewater treatment plant (WWTP), which treats part of the effluent from one of the largest textile industry districts in Italy. The combined treatment efficiency was assessed both on ozonated and

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Sánchez-Romate, Xoan F., Alberto Jiménez-Suárez, Mónica Campo, Alejandro Ureña, and Silvia G. Prolongo. "Electrical Properties and Strain Sensing Mechanisms in Hybrid Graphene Nanoplatelet/Carbon Nanotube Nanocomposites." Sensors 21, no. 16 (2021): 5530. http://dx.doi.org/10.3390/s21165530.

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Electrical and electromechanical properties of hybrid graphene nanoplatelet (GNP)/carbon nanotube (CNT)-reinforced composites were analyzed under two different sonication conditions. The electrical conductivity increases with increasing nanofiller content, while the optimum sonication time decreases in a low viscosity media. Therefore, for samples with a higher concentration of GNPs, an increase of sonication time of the hybrid GNP/CNT mixture generally leads to an enhancement of the electrical conductivity, up to values of 3 S/m. This means that the optimum sonication process to achieve the b

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Lu, Shao Wei, Xian Jun Zeng, Peng Nie, and Chun Xu Zhang. "Sonication Parameters Analysis of MWCNTs Monodispersion in Aqueous Solution of Triton X-100." Advanced Materials Research 738 (August 2013): 46–51. http://dx.doi.org/10.4028/www.scientific.net/amr.738.46.

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Monodispersion of multi-walled carbon nanotubes with assistance of surfactants has become a usual procedure. A parametric analysis of sonication was performed in order to optimize the preparation procedure of MWCNTs monodispersion solution. MWCNTs solutions were characterized with results of UV-VIS absorbance and FT-IR spectra in order to find the optimal sonication time and power. Perfect sonication time obtained at the higher absorption peak 2.699 in 400nm is 42min, which can be define as sonication cycle. MWCNTs can achieve its optimum dispersion situation, when onication power is 270w, In

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Zhang, Chun Lei, A. K. Agadzi, Xiao Tong Fei, and Ting Li. "Ultrasound Assisted Removal of Unstable Form of Cu and Ni from Contaminated Soil." Applied Mechanics and Materials 522-524 (February 2014): 678–81. http://dx.doi.org/10.4028/www.scientific.net/amm.522-524.678.

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Heavy metals exist in different forms in polluted soils however only the unstable form is bioavailable and potentially threatening to the environment. This study adopted the ultrasound technique as a tool to transform the unstable heavy metal forms into soluble forms and remove them. Acoustic cavitation coupled with mechanical stirring was used to facilitate the removal of Cu and Ni from a polluted soil. Effect of sonication treating time, sonication power and slurry concentration factors on the removal efficiency (RE) were studied. Test results show that the RE increase with sonication treati

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Fang, Shiyuan, Weiqiang Qiu, Jun Mei, and Jing Xie. "Effect of Sonication on the Properties of Flaxseed Gum Films Incorporated with Carvacrol." International Journal of Molecular Sciences 21, no. 5 (2020): 1637. http://dx.doi.org/10.3390/ijms21051637.

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Carvacrol is a natural compound known to be a highly effective antibacterial; however, it is a hydrophobic molecule, which is a limitation to its use within food packaging. Flaxseed gum (FG) films containing different contents of carvacrol (C) were produced by a film-casting method with sonication. The effects of sonication power and time on the properties of the FG-C films were investigated by measuring the film thickness, mechanical properties, contact angle, opacity, water vapor permeability (WVP), water sorption isotherm, Fourier transform infrared spectroscopy(FTIR), differential scanning

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Ghaleb, Z. A., M. Mariatti, Zulkifli Mohamad Ariff, and Abdul Rahman Mohamed. "Comparison on Tensile Properties of Graphene and Multi-Walled Carbon Nanotubes/Epoxy Thin Film Composites." Advanced Materials Research 1024 (August 2014): 140–43. http://dx.doi.org/10.4028/www.scientific.net/amr.1024.140.

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Graphene nanoplatelets (GNP)/epoxy and multi-walled carbon nanotube (MWCNTs)/epoxy thin film composites were fabricate by ultrasonication and spin coating technique. The tensile properties of epoxy containing (0.2, 0.6 and 1 vol%) of GNP sonicated at different duration (10, 20 and 30 min) or MWCNTs sonicated at 20 min only have been studied. It was found that the addition of GNP was decrease the tensile strength and modulus. However, among all samples, GNP/epoxy produced by 20 min sonication time showed slightly higher tensile strength and modulus. The effect of sonication time was supported b

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Xu, Zhiyuan, Carissa Carlson, John Snell, et al. "Intracranial inertial cavitation threshold and thermal ablation lesion creation using MRI-guided 220-kHz focused ultrasound surgery: preclinical investigation." Journal of Neurosurgery 122, no. 1 (2015): 152–61. http://dx.doi.org/10.3171/2014.9.jns14541.

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OBJECT In biological tissues, it is known that the creation of gas bubbles (cavitation) during ultrasound exposure is more likely to occur at lower rather than higher frequencies. Upon collapsing, such bubbles can induce hemorrhage. Thus, acoustic inertial cavitation secondary to a 220-kHz MRI-guided focused ultrasound (MRgFUS) surgery is a serious safety issue, and animal studies are mandatory for laying the groundwork for the use of low-frequency systems in future clinical trials. The authors investigate here the in vivo potential thresholds of MRgFUS-induced inertial cavitation and MRgFUS-i

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Teixeira da Silva, Jaime A., and Judit Dobránszki. "Sonication (Ultrasound) Affects In Vitro Growth of Hybrid Cymbidium." Botanica Lithuanica 20, no. 2 (2015): 121–30. http://dx.doi.org/10.2478/botlit-2014-0014.

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AbstractThe use of ultrasound or sonication has been shown to stimulate growth and development of several plant species. No study exists on the impact of sound on Cymbidium growth in vitro. Using sonication at 60 Hz for several time periods, the response on new protocorm-like body (neo-PLB) formation on Teixeira Cymbidium (TC) medium was examined, as was the response on in vitro plant organogenesis. Sonication for 5 or 10 min stimulated neo-PLB formation significantly more than plant growth regulator (PGR)-free TC medium without sonication (negative control) and more than 1, 20 or 45 min sonic

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Alshabanat, Mashael, Amal Al-Arrash, and Waffa Mekhamer. "Polystyrene/Montmorillonite Nanocomposites: Study of the Morphology and Effects of Sonication Time on Thermal Stability." Journal of Nanomaterials 2013 (2013): 1–12. http://dx.doi.org/10.1155/2013/650725.

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Polymer nanocomposites of polystyrene matrix containing 10% wt of organo-montmorillonite (organo-MMT) were prepared using the solution method with sonication times of 0.5, 1, 1.5, and 2 hours. Cetyltrimethylammonium bromide (CTAB) is used to modify the montmorillonite clay after saturating its surface with Na+ions. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to characterize the montmorillonite before and after modification by CTAB. The prepared nanocomposites were characterized

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Pérez-Elvira, S. I., L. C. Ferreira, A. Donoso-Bravo, M. Fdz-Polanco, and F. Fdz-Polanco. "Full-stream and part-stream ultrasound treatment effect on sludge anaerobic digestion." Water Science and Technology 61, no. 6 (2010): 1363–72. http://dx.doi.org/10.2166/wst.2010.893.

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The use of ultrasound as pre-treatment to improve anaerobic digestion of secondary sludge has been established as a promising technology. There are great differences between lab scale and full-scale devices, regarding the relationship between the disintegration achieved and the energy supplied. Based on economic aspects, most of the full-scale plants use partial-stream instead of the full-stream sonication, which affects biogas production and digestate dewatering characteristics. A laboratory scale operation combining ultrasound and anaerobic digestion (batch tests) has been performed, determi

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Stanisic, Svetlana, Ljubisa Ignjatovic, Ivan Andjelkovic, Milica Stevic, Aleksandra Tasic, and Marjetka Savic-Bisercic. "The ultrasound assisted extraction of matrix elements and heavy metal fractions associated with Fe, Al and Mn oxyhydroxides from soil." Journal of the Serbian Chemical Society 77, no. 9 (2012): 1287–300. http://dx.doi.org/10.2298/jsc110929209s.

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The single agent extractions of major and trace metals from soil sample were conducted by means of rotary mixer and ultrasonic bath with sonication time of 10, 20, 30, 40 and 50 min. The sequential extraction according to the BCR scheme was undertaken. The obtained soil extracts were analyzed by ICP-OES and according to the results the rotary mixer assisted extraction was more efficient in the case of alkaline-earth elements. However, by the use of ultrasound several times higher amounts of matrix elements (Fe, Al and Mn) and heavy metals predominantly associated with Fe, Al and Mn oxyhydroxid

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Montazeri, Arash, Alireza Khavandi, Jafar Javadpour, and Abbas Tcharkhtchi. "An Investigation on the Effect of Sonication Time and Dispersing Medium on the Mechanical Properties of MWCNT/Epoxy Nanocomposites." Advanced Materials Research 264-265 (June 2011): 1954–59. http://dx.doi.org/10.4028/www.scientific.net/amr.264-265.1954.

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This work studied the effect of sonication time and dispersing medium on the dispersion state of 0.1%wt multi-wall carbon nanotube (MWCNT) in the MWCNT/epoxy nanocomposite system. Epoxy, hardener, and epoxy/solvent were used as dispersing mediums in this study. Tensile strength, strain at failure, Young's modulus and fracture toughness were measured under different dispersion state of MWCNT. The results indicate that with the increase in sonication time, initially there was an increase in tensile strength and fracture toughness values which was followed by a drop in values at longer sonication

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Tieu, Doanh Tu, My Khanh Nguyen, Tham Thi Hong Nguyen, Thanh Vo Ke Ngo, and Quyet Huu Do. "Study to Fabricate the Large Scale Buckypaper Based on Carbon Nanotubes." Communications in Physics 28, no. 3 (2018): 217. http://dx.doi.org/10.15625/0868-3166/28/3/10758.

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Carbon nanotubes (CNTs) have attracted great attention because of their unique structural, electrical, mechanical and thermal properties. Then CNTs have potential application as electrode for batteries and supercapacitors, especially binder-free electrodes. The major challenge is to fabricate the large scale electrode with the uniform thickness, electrical property. The large scale CNTs buckypaper can be fabricated via vacuum filtration technique. The characteristics of CNT dispersion and buckypaper depend on variety of factor such as sonication power, sonication time, dispersant…. In this stu

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Sánchez-Romate, Xoan F., Alejandro Sans, Alberto Jiménez-Suárez, Mónica Campo, Alejandro Ureña, and Silvia G. Prolongo. "Highly Multifunctional GNP/Epoxy Nanocomposites: From Strain-Sensing to Joule Heating Applications." Nanomaterials 10, no. 12 (2020): 2431. http://dx.doi.org/10.3390/nano10122431.

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A performance mapping of GNP/epoxy composites was developed according to their electromechanical and electrothermal properties for applications as strain sensors and Joule heaters. To achieve this purpose, a deep theoretical and experimental study of the thermal and electrical conductivity of nanocomposites has been carried out, determining the influence of both nanofiller content and sonication time. Concerning dispersion procedure, at lower contents, higher sonication times induce a decrease of thermal and electrical conductivity due to a more prevalent GNP breakage effect. However, at highe

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Wang, Yuehui, Xing Yang, and Dexi Du. "Silver Nanowires from Sonication-Induced Scission." Micromachines 10, no. 1 (2019): 29. http://dx.doi.org/10.3390/mi10010029.

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Silver nanowires (AgNWs) have great potential to be used in the flexible electronics industry for their applications in flexible, transparent conductors due to high conductivity and light reflectivity. Those applications always involve size which strongly affects the optical and electrical properties of AgNWs. AgNWs of mean diameter 70 nm and mean length 12.5 μm were achieved by the polyol solvothermal method. Sonication-induced scission was used to obtain the small size AgNWs. The relationship between the size of AgNWs and the ultrasonic time, ultrasonic power, and concentration of AgNWs were

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Güler, Ömer, S. Hale Güler, Veyis Selen, M. Gokhan Albayrak, and Ertan Evin. "Production of graphene layer by liquid-phase exfoliation with low sonication power and sonication time from synthesized expanded graphite." Fullerenes, Nanotubes and Carbon Nanostructures 24, no. 2 (2015): 123–27. http://dx.doi.org/10.1080/1536383x.2015.1114472.

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Ali, Syed Sadiq, Mohammed Shahabuddin, and Mohammad Asif. "In Situ Monitoring of Dispersion Dynamics of Carbon Nanotubes during Sonication Using Electrical Conductivity Measurements." Journal of Nanomaterials 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/479053.

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The main challenge in the fabrication of carbon nanotube- (CNT-) based composite materials is the optimization of the sonication time in order to obtain homogenous and uniform dispersion of CNTs. Past studies mostly relied on postprocessing characterization techniques to address this issue. In the present, however, in situ monitoring of dispersion dynamics of CNTs in distilled water is carried out using instantaneous conductivity measurements. Using a computer controlled data acquisition system, the time evolution of the solution conductivity was carefully recorded. The data were then used to

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Aboubakar, Mohamed, Eshmaiel Ganjian, Homayoon Sadeghi-Pouya, A. M. Akash, and Mircea Vinatoru. "Compressive Strength of Cement Mortar Using Sebha Clay, Treated by Sonication Method." Applied Mechanics and Materials 377 (August 2013): 60–68. http://dx.doi.org/10.4028/www.scientific.net/amm.377.60.

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Clay as natural pozzolan is found in the north of the city of Sebha, Libya. Sebha clay is relatively high in silica, and its physical and chemical properties could be referred to as ASTM C618 class N. Sonication treatment is carried out and the treated Sebha clay is used as a mineral admixture in the Portland cement mortar. Horn method 20 kHz frequencies with different powers and different times are used in the Sonication treated. The particle size distributions (PSD) and Scanning Electron Microscope (SEM) imaging are used to understand the mechanism of pozzolanic improvement of the Sebha clay

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Anand, Anubhav, Gyanendra Singh, and Shubhini A Saraf. "PLACKETT–BURMAN DESIGN AS A TOOL FOR SCREENING AND PROCESS OPTIMIZATION OF RIVASTIGMINE-LOADED LIPID NANOCARRIERS." Asian Journal of Pharmaceutical and Clinical Research 11, no. 12 (2018): 155. http://dx.doi.org/10.22159/ajpcr.2018.v11i12.28066.

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Objective: Plackett–Burman experimental design is used to identify the most important factors early in the experimentation phase when complete knowledge about the system is usually unavailable. The objective of this study was to screen out the most important factors affecting the size and entrapment efficiency of rivastigmine hydrogen tartrate (RHT) nanostructured lipid carriers (NLCs).Methods: The RHT-loaded NLC was prepared by the modified solvent emulsification-diffusion method. The independent variables selected for Plackett–Burman design were drug: lipid ratio, solid lipid/liquid lipid (S

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Alfarisa, Suhufa, Dwi Ahmad Rifai, and Parmin Lumban Toruan. "Studi Difraksi Sinar-X Struktur Nano Seng Oksida (ZnO)." Risalah Fisika 2, no. 2 (2018): 53–57. http://dx.doi.org/10.35895/rf.v2i2.114.

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Abstrak – Kajian terhadap difraksi sinar-X struktur nano ZnO dengan waktu sonikasi yang berbeda telah dilakukan menggunakan metode hidrotermal-sonokimia. Variasi waktu sonikasi yang digunakan dalam kajian ini adalah 0 (tanpa sonikasi), 30, 45, dan 60 menit. Pola difraksi sinar-X diplotkan dan dibandingkan untuk mengetahui struktur, kristalinitas dan kemurnian ZnO yang dihasilkan. Estimasi ukuran kristal ZnO juga dihitung menggunakan persamaan Scherrer. Hasil penelitian menunjukkan bahwa struktur nano ZnO yang disintesis tanpa proses sonikasi memiliki kemurnian kristal yang rendah dengan ukuran

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Dai, Qian Wen, Zi Li Liu, Cui Xia Xu, Qi Gang Xie, Fan Zhang, and Jian Jie Zhang. "Liquid-Phase Selective Hydrogenation of Nitrobenzene over Ultrasonic-Assisted Ni-Mo-P Amorphous Catalyst." Advanced Materials Research 550-553 (July 2012): 420–23. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.420.

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The Ni-Mo-P amorphous catalysts were prepared by chemical reduction method under different sonication conditions. The catalytic performance of the prepared catalysts in selective hydrogenation of nitrobenzene(NB) to aniline(AN) were characterized by XRD, BET, N2-adsorption, H2-TPR and H2-TPD. The results show that the introduction of ultrasonic can improve the dispersion of the active sites in the catalyst, the particle size of the catalyst is also smaller than the regular prepared Ni-Mo-P amorphous catalyst. And the influences of the sonication power and time on the catalysts were discussed a

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Hussain, Shehzad, Minaxi Sharma, and Rajeev Bhat. "Valorisation of Sea Buckthorn Pomace by Optimization of Ultrasonic-Assisted Extraction of Soluble Dietary Fibre Using Response Surface Methodology." Foods 10, no. 6 (2021): 1330. http://dx.doi.org/10.3390/foods10061330.

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Sea buckthorn pomace is a valuable industrial waste/by-product obtained after juice production that contains bioactive, health-promoting dietary fibres. This pomace finds usage as animal feed or simply discarded, owed to the lack of appropriate handling or processing facilities. The present study was aimed to evaluate the effects of green extraction technologies such as ultrasonic-assisted extraction on the yield of soluble dietary fibre (SDF) from sea buckthorn pomace. Response surface methodology (RSM) coupled with Box–Behnken design (BBD) was applied for optimization of SDF yield. The effec

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Kader, Mohammad S., and Charles C. Chusuei. "A Cobalt (II) Oxide Carbon Nanotube Composite to Assay Dopamine." Chemosensors 8, no. 2 (2020): 22. http://dx.doi.org/10.3390/chemosensors8020022.

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A cobalt (II) oxide/carboxylic acid functionalized multiwalled carbon nanotube (CoO/COOH-MWNT) composite was fabricated for the biochemical detection of dopamine (DA). CoO particles were tethered to COOH-MWNTs by sonication. The current response versus different concentration was measured using cyclic voltammetry. Various parameters, including sonication time, pH, and loading were varied for the best current response. The composite with optimum current response was formed using a 30-min sonication time, at pH 5.0 and a 0.89 µg/mm2 loading onto the glassy carbon electrode surface. Good sensitiv

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Qi, J., Y. Y. Ye, J. J. Wu, H. T. Wang, and F. T. Li. "Dispersion and stability of titanium dioxide nanoparticles in aqueous suspension: effects of ultrasonication and concentration." Water Science and Technology 67, no. 1 (2013): 147–51. http://dx.doi.org/10.2166/wst.2012.545.

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The increasing applications of titanium dioxide (TiO2) nanoparticles raise concerns about their potential environmental impacts. To investigate the fate and transport of TiO2 nanoparticles in aqueous suspension, ultrasonication is widely used for the dispersion of TiO2 nanoparticles in laboratory-scale studies. There is a pressing need for detailed information on the dispersion and stability of TiO2 nanoparticles. This study investigated the change of size, zeta potential, and pH of TiO2 nanoparticles aqueous suspension under different conditions of ultrasonication and concentrations. It was f

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Šic Žlabur, Jana, Nadica Dobričević, Mladen Brnčić, et al. "Evaluation of the Behavior of Phenolic Compounds and Steviol Glycosides of Sonicated Strawberry Juice Sweetened with Stevia (Stevia rebaudiana Bertoni)." Molecules 24, no. 7 (2019): 1202. http://dx.doi.org/10.3390/molecules24071202.

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In this study, the influence of stevia addition and sonication processing parameters on the phenolic content and profile as well as the steviol glycosides of strawberry juice-based samples was investigated. For this purpose, three matrices—control samples of strawberry juices without green stevia powder (CS), strawberry juices with green stevia powder (JGSP), and sonicated juices with green stevia powder (SJGSP)—were prepared. For sonication purposes, different conditions regarding probe diameters (7 mm and 22 mm), amplitudes (50%, 75%, and 100%), and time (15 min, 20 min, and 25 min) were tes

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Merdassa, Yared, Jing-fu Liu, and Negussie Megersa. "Development and Validation of One-Step Ultrasound-Assisted Extraction for Simultaneous Determination of Multiclass Fungicides in Soils." Journal of AOAC INTERNATIONAL 98, no. 1 (2015): 192–200. http://dx.doi.org/10.5740/jaoacint.14-033.

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Abstract A rapid, efficient, and simple one-step ultrasound-assisted extraction (UAE) method was developed forthe analysis of seven fungicides (cymoxanil, metalaxyl, mandipropamid, folpet, chlorothalonil, kresoxim-methyl, and famoxadone) in horticultural soils. Analytes in the samples were determined by HPLC with variable wavelength detection. Key parameters that influence the UAE procedure were optimized, such as the nature and volume of extraction solvent, number of sonication steps, and sonication time. The highest extraction efficiencies in the range of 61.1–87.8% were obtained by using on

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Leong, Shi Xuan, Carmen C. Mayorga-Martinez, Zdeněk Sofer, Jan Luxa, Shu Min Tan, and Martin Pumera. "A study of the effect of sonication time on the catalytic performance of layered WS2 from various sources." Physical Chemistry Chemical Physics 19, no. 4 (2017): 2768–77. http://dx.doi.org/10.1039/c6cp07385a.

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Kahattha, Chokchai, Naratip Vittayakorn, and Wisanu Pecharapa. "Effect of Sonication Time and Calcination Temperature on Physical Properties of Titanium Dioxide Synthesized via Sonochemical-Assisted Process." Advanced Materials Research 802 (September 2013): 252–56. http://dx.doi.org/10.4028/www.scientific.net/amr.802.252.

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Titanium dioxide nanoparticles (TiO2) were successfully synthesized via a sonochemical-assisted process using titanium isopropoxide as the titanium sources and calcination process at 300-500 °C. The effect of sonication time and heat treatment temperature on structural and nanostructure properties of the nanoparticles were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscope (SEM) and transmission electron microscope (TEM). The XRD and Raman results indicated that the crystalline of as-sonochemically synthesized TiO2 nanoparticles corresponded to anatase p

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Rahmawati, Dewi Elok, Lilik Miftahul Khoiroh, Rachmawati Ningsih, Febi Yusniyanti, Wariatus Solawati та Puspa Sari. "Synthesis of Hematite Pigment (Α-Fe2O3) from Iron Lathe Waste using Precipitation-Sonication Method as Anti-Swelling on Wood". International Journal of Mechanical Engineering Technologies and Applications 1, № 2 (2020): 69. http://dx.doi.org/10.21776/mechta.2020.001.02.5.

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<p class="02abstracttext"><span lang="PT-BR">Iron lathe waste powder has the potential as a raw material in the synthesis of hematite pigments. Hematite pigments have many advantages, one of which is anti-swelling properties that can maintain the dimensions of wood. Hematite pigment synthesis was carried out using the precipitation-sonication method. The precipitation stage uses an ammonium hydroxide solution as a precipitating agent. Stages of sonication using the PEG-6000 template were performed at different times were 30, 45, and 90 minutes then calcined at 750 ° C for 3 hours.

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Knowles, Gregory P., and Alan L. Chaffee. "Aminopropyl-Functionalized Silica CO2Adsorbents via Sonochemical Methods." Journal of Chemistry 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/1070838.

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Aminopropyl-functionalized hexagonal mesoporous silica (HMS) products, as are of interest for CO2capture applications, were separately prepared by mixing aminopropyltrimethoxysilane (APTS) and HMS in toluene via a conventional stirred reactor and via sonication assisted methods, to investigate the potential of sonication to facilitate the preparation of products with higher tether loadings and correspondingly higher CO2sorption capacities. Sonication was expected to improve both the dispersion of the substrate in the solvent and the diffusion of the silane throughout the mesoporous substrate.

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Watanabe, Mayuko, Junko Ikeda, Yoshihiro Takeda, Mika Kawai, and Tetsu Mitsumata. "Effect of Sonication Time on Magnetorheological Effect for Monomodal Magnetic Elastomers." Gels 4, no. 2 (2018): 49. http://dx.doi.org/10.3390/gels4020049.

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Long, Zeqing, Guangming Zhang, Ting Wei, Lijun Niu, Jia Zhu, and Jinwei Li. "Tuning of BixOyCl formation with sonication time during ultrasound-hydrothermal preparation." Journal of Industrial and Engineering Chemistry 84 (April 2020): 322–31. http://dx.doi.org/10.1016/j.jiec.2020.01.014.

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