Lubricant Enhancement via Hydrodynamic and Acoustic Cavitation

Kiu, Stephen Sie Kiong; Yusup, Suzana; Soon, Chok Vui; Arpin, Taufiq; Samion, Syahrullail

doi:10.1016/j.proeng.2016.06.493

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…The effectiveness of homogenization is directly correlated with dispersion degree of generated suspension and has the further influence on rheological properties of cement systems modified by nanoadditives. Homogenization of nanomaterials can be provided by different methods, such as bead milling process (Yoshio et al, 2011), hydrodynamic, acoustic cavitation (Chai, Yusup, Chok, Arpin, & Irawan, 2016;Kiu, Yusup, Soon, Arpin, & Samion, 2016) and ultrasonication technique, which is more frequently used nowadays (Zou et al, 2015;Konsta-Gdoutos, Metaxa, & Shah, 2010). The listed methods allow to avoid agglomeration process in water suspension of nanoparticles and make it possible to use them for modification of cement systems in fresh and hardened state.…”

Section: Introductionmentioning

confidence: 99%

Degree of MWCNT suspension dispersity and its influence on rheology of cement pastes

Skripkiūnas

Karpova

Bendoraitienė

et al. 2019

Modern Building Materials, Structures and Techniques (MBMST)

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Modification of cement pastes by MWCNT (multi-walled carbon nanotubes) suspension enables to manage by their rheological properties due to the nanometer size of MWCNT. Dispersity degree of MWCNT suspension may be determined by the number of factors such as type and intensity of homogenization equipment, duration of homogenization and some other. The aim of present research consists in the establishment of optimal methodology of MWCNT suspension homogenization and investigation of dependence between dispersity degree of MWCNT suspension and rheological properties of cement pastes with that suspension. Two types of homogenization methods of MWCNT were tested such as ultrasonication and homogenization based on rotor-stator principle. The ultrasonication treatment about 6 min was established as optimal homogenization technique in the course of the current research. The yield stress and plastic viscosity of cement paste modified by MWCNT suspension increased in comparison with cement paste modified by polycarboxylate ether plasticizer (PCE) in 5 and 30 min after cement pastes mixing.Time of ultrasonication of MWCNT suspension more than 6 min did not have the influence on rheological behaviour of cement pastes.Addition of MWCNT decreased the volume coefficient of water bleeding of cement paste with PCE by 18%.

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Section: Introductionmentioning

confidence: 99%

Degree of MWCNT suspension dispersity and its influence on rheology of cement pastes

Skripkiūnas

Karpova

Bendoraitienė

et al. 2019

Modern Building Materials, Structures and Techniques (MBMST)

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“…In addition to emulsion processing and wastewater treatment, hydrodynamic cavitation is also applied for lubricant enhancement, during which an optimum concentration of nanoparticles is added to the lubricant to significantly improve its tribological performance . In a research study conducted by Kiu et al, multi‐wall carbon nanotubes were added to the lubricants through hydrodynamic and acoustic (ultrasonic) cavitation.…”

Section: Introductionmentioning

confidence: 99%

“…In a research study conducted by Kiu et al, multi‐wall carbon nanotubes were added to the lubricants through hydrodynamic and acoustic (ultrasonic) cavitation. The results showed that the addition of multi‐wall carbon nanotubes improved the nanofluids’ viscosity and both the ultrasonic and hydrodynamic cavitation yield higher viscosity than pure samples …”

Section: Introductionmentioning

confidence: 99%

Effects of ultrasonic cavitation on neutralization process of low molecular weight polyethylene glycol

et al. 2018

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In recent decades, ultrasound has been broadly employed in different applications, particularly in the chemical industry. Ultrasound enhances chemical reactions in a solution via generation of cavitation microbubbles. It improves mass transfer rate and kinetic rate of targeted systems under various process conditions. In polyethylene glycol (PEG) production, the neutralization reaction is generally carried out by employing a mechanical stirring operation. However, this process produces a soluble salt containing potassium and acetate ions, which are known to appreciably manipulate/alter the properties of PEG. In this paper, ultrasound influence is initially analyzed through the neutralization of deionized water. This study then focuses on the neutralization of PEG using ultrasonic cavitation and its impact on the properties of PEG. The ultrasonic cavitation unit employed in this research is a COLE‐Parmer® 500 W & 20 kHz with an ultrasonic probe. To investigate the efficiency of the ultrasonic cavitation reactor and analyze the important aspects of the implemented method, the concentration of soluble salts and conductivity of PEG neutralized by the ultrasonic cavitation method are measured and compared with those of the commercial PEG prepared by the mechanical stirring methodology. The results reveal that the neutralization reaction via the ultrasonic cavitation lowers the conductivity and concentrations of potassium and acetate ions, compared to the traditional stirring methods. It is also concluded that the minimum conductivity and the minimum content of potassium and acetate ions are achieved at 30 % power and a reaction time of 5 min. This study promises the efficient utilization of the ultrasonic cavitation in the industrial sectors, particularly in pharmaceutical industries.

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Laboratory-scale synthesis and scale-up challenges

Bhanvase¹,

Barai²

2021

Nanofluids for Heat and Mass Transfer

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Lubricant Enhancement via Hydrodynamic and Acoustic Cavitation

Cited by 5 publications

References 14 publications

Degree of MWCNT suspension dispersity and its influence on rheology of cement pastes

Degree of MWCNT suspension dispersity and its influence on rheology of cement pastes

Effects of ultrasonic cavitation on neutralization process of low molecular weight polyethylene glycol

Laboratory-scale synthesis and scale-up challenges

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