Development and testing of a novel glycerol/chitosan based biocide-free hydraulic fluid

Gelinski, Sabrina; Winter, Marius; Wichmann, Hubertus; Bock, Ralf; Herrmann, Christoph; Bahadir, Müfit

doi:10.1016/j.jclepro.2015.11.006

Cited by 14 publications

(8 citation statements)

References 10 publications

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“…Note also that compressibility of the three mentioned-above ILs is clearly lower than that of water (Figure ) but higher than the compressibility of glycerol which is approximately only one-half as compressible as water. Glycerol is one of the least compressible of the liquids and is used as a component of hydraulic fluid in the food industry as well as in developing novel hydraulic fluids that are high performing, free of mineral oil and biocides, and based on renewable materials as well as compatible to human health and the environment . In developing such novel hydraulic fluids, ILs are obviously a valuable alternative because they possess great potential.…”

Section: Resultsmentioning

confidence: 99%

“…Glycerol is one of the least compressible of the liquids and is used as a component of hydraulic fluid in the food industry as well as in developing novel hydraulic fluids that are high performing, free of mineral oil and biocides, and based on renewable materials as well as compatible to human health and the environment. 72 In developing such novel hydraulic fluids, ILs are obviously a valuable alternative because they possess great potential. An additional property calculated in this work is the internal pressure P int .…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

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Isobaric and Isochoric Heat Capacities as Well as Isentropic and Isothermal Compressibilities of Di- and Trisubstituted Imidazolium-Based Ionic Liquids as a Function of Temperature

Musiał

Bałuszyńska

Zorębski

et al. 2018

Ind. Eng. Chem. Res.

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The isobaric and isochoric heat capacities of six disubstituted imidazolium-based ionic liquids with different anions and two trisubstituted imidazolium-based bis-(trifluoromethylsulfonyl)imides were determined at atmospheric pressure in the temperature range from 293.15 to 323.15 K. The isobaric heat capacities were determined using differential scanning calorimetry. The isochoric heat capacities were determined indirectly by means of the acoustic method from the speed of sound and density measurements. Also, other connected with the speed of sound quantities such as isentropic and isothermal compressibilities as well as internal pressures were determined. The highest compressibilities show both trisubstituted imidazolium-based bis(trifluoromethylsulfonyl)imides whereas 1-ethyl-3-methylimidazolium thiocyanate shows the lowest compressibility. The critical comparison of the isobaric heat capacity data with the available literature data makes possible a recommendation of the most reliable heat capacity values. Analyzed predictive capability of two heat capacity models based on the group contribution method is poor in the case of the [C(CN) 3 ] − anion. Additionally, based on the speeds of sound, the thermal conductivities were calculated using a modified Bridgman relation and compared with values estimated by a group contribution method. Here, the worst results are obtained in the case of [SCN] − anion.

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Section: Resultsmentioning

confidence: 99%

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

Isobaric and Isochoric Heat Capacities as Well as Isentropic and Isothermal Compressibilities of Di- and Trisubstituted Imidazolium-Based Ionic Liquids as a Function of Temperature

Musiał

Bałuszyńska

Zorębski

et al. 2018

Ind. Eng. Chem. Res.

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“…Thus, these glycerol and water based MWFs do not contain conventional biocides. A glycerol concentration of at least 30 to 35% is necessary to limit microbial growth in an acceptable manner [79] , [80] . Nevertheless, glycerol present at lower concentration can serve as a nutrient and improve microbial development.…”

Section: How To Potentiate the Activity Of A Biocide? Application To mentioning

confidence: 99%

Ways to improve biocides for metalworking fluid

Martino

2021

AIMS Microbiology

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Metalworking fluids (MWF) are mainly emulsions of oil in water containing additives such as corrosion inhibitors, emulsifiers, defoamers, and biocides. Microbial contamination of MWF is almost systematic, and some of their constituents serve as nutrients for contaminating microorganisms. Biocides for MWF are protection products used to counter microbial contaminations and growth. Ideally, a biocide for MWF should have the following non-exhaustive criteria: have a broad-spectrum activity, be usable at low concentrations, be compatible with the formulation and the physical-chemical properties of MWF, be stable over time, retain its effectiveness in the presence of soiling, have no corrosive action on metals, present no danger to humans and the environment, be inexpensive. The future lies in the development of new molecules with biocidal activity corresponding to these ideal specifications, but in the meantime, it is possible to improve the performance of existing molecules currently on the market. Different strategies for potentiation of the activity of existing biocides are possible. The compatibility of the potentiation strategies with their use in metal working fluids is discussed.

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“…1,3,16,17 It should be noted that although, in developing novel hydraulic fluids, ILs are of great importance, investigations to develop new and efficient hydraulic fluids, that are free of mineral oil and environmentally friendly, or at least environmentally acceptable, are not limited to ILs only. 18 All the advantages of the alkyl sulfate-based ILs have become the motivation for the presented work which will broaden the knowledge regarding the already widely studied [C 2 C 1 im]-[EtSO 4 ] and weakly tested [C 2 C 2 im][EtSO 4 ]. 19 For both ILs, this work extended considerably a recent study on heat capacities and related properties executed at atmospheric pressure.…”

Section: ■ Introductionmentioning

confidence: 97%

“…Low compressibility leads to a high efficiency factor of a high pressure machine and permits a reduction in the size pumps and equipment. , Schlücker et al reported that increasing volumetric efficiency reached 30% after replacing the mineral hydraulic oil by the [C 2 C 1 im][EtSO 4 ] in hydraulically driven diaphragm pumps. All above-mentioned studies prove that, for high pressure hydraulic systems, compressibility is one of the crucial properties and that low compressibility indicates high potential for hydraulic applications. ,,, It should be noted that although, in developing novel hydraulic fluids, ILs are of great importance, investigations to develop new and efficient hydraulic fluids, that are free of mineral oil and environmentally friendly, or at least environmentally acceptable, are not limited to ILs only …”

Section: Introductionmentioning

confidence: 99%

Comparative Study of the High Pressure Thermophysical Properties of 1-Ethyl-3-methylimidazolium and 1,3-Diethylimidazolium Ethyl Sulfates for Use as Sustainable and Efficient Hydraulic Fluids

Dzida

Musiał

Zorębski

et al. 2018

ACS Sustainable Chem. Eng.

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In this work, we discussed and compared new acoustic (speed of sound), transport (viscosity), surface (surface tension and contact angle on stainless steel and glass), and thermophysical properties with special regard for compressibilities and isobaric thermal expansion of 1,3-diethylimidazolium ethyl sulfate ([C2C2im][EtSO4]) with those of 1-ethyl-3-methylimidazolium ethyl sulfate ([C2C1im][EtSO4]), the reference mineral, synthetic, and biodegradable oils as well as hydraulic oils for use as hydraulic fluids. The refractive indices, NMR spectra, and cytotoxicities of [C2C1im][EtSO4] and [C2C2im][EtSO4] were also investigated. [C2C1im][EtSO4] and [C2C2im][EtSO4] have low isothermal compressibility and isobaric thermal expansion values, which are weakly dependent on the pressure and temperature. The viscosity, surface tension, and contact angle of [C2C2im][EtSO4] are more similar to that of commercial hydraulic oils than [C2C1im][EtSO4]. The investigated ILs have a 20 times lower toxicity on normal fibroblast from human new-born skin than that of bis(trifluoromethylsulfonyl)imide-based ILs. The presented results show that [C2C2im][EtSO4] can potentially be used as a hydraulic fluid in the same way as [C2C1im][EtSO4].

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Development and testing of a novel glycerol/chitosan based biocide-free hydraulic fluid

Cited by 14 publications

References 10 publications

Isobaric and Isochoric Heat Capacities as Well as Isentropic and Isothermal Compressibilities of Di- and Trisubstituted Imidazolium-Based Ionic Liquids as a Function of Temperature

Isobaric and Isochoric Heat Capacities as Well as Isentropic and Isothermal Compressibilities of Di- and Trisubstituted Imidazolium-Based Ionic Liquids as a Function of Temperature

Ways to improve biocides for metalworking fluid

Comparative Study of the High Pressure Thermophysical Properties of 1-Ethyl-3-methylimidazolium and 1,3-Diethylimidazolium Ethyl Sulfates for Use as Sustainable and Efficient Hydraulic Fluids

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