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Keyword: pH

Total Papers Found: 18
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The development of a microfabricated transient planar source (TPS) sensor for measuring thermal conductivity of nanofluids

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The addition of thermally conductive nanoparticles to conventional heat transfer fluids enhances their performance so they can be used for high-powered applications. However, as nanoparticles are added, the liquid becomes ...

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Systematic studies of tannin–formaldehyde aerogels: preparation and properties

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A variety of tannin-formaldehyde aerogels were produced in order to examine the effects of pH and dilution during their manufacture. The authors produced a phase diagram that could describe them. ...

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Effect of pH and chemical surfactant on thermal conductivity enhancement of Cu-H2O nanofluids 

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This study investigates the effect changing the PH of a copper nanofluid and sodium dodecylbenzenesulfonate (SDBS) surfactant concentration has on the thermal conductivity of the nanofluid. The thermal conductivity was ...

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Reduction of shrinkage and brittleness for resorcinol-formaldehyde aerogels by means of a pH-controlled sol-gel process 

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This article investigates how the thermal conductivity of a resorcinol-formaldehyde aerogels varies with increasing resorcinol (R) to water (W) ratios. The thermal conductivity was measured using the Hot disk transient ...

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New tannin-lignin aerogels

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Tannin and lignin are organic materials that are more cost-effective than synthetic, non-renewable phenolic compounds. In this paper, tannin-lignin-formaldehyde (TLF) composites were used to synthesize thermally insulative mesoporous aerogels. A ...

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Highly mesoporous organic aerogels derived from soy and tannin 

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The first soy and tannin based organic aerogels with 91% naturality have been developed by researchers, and they have low bulk density but high volumes of mesopores. In this experiment, the ...

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Analysis of factors influencing thermal conductivity and viscosity in different kinds of surfactant solutions

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Surfactants are often used in nanofluids to help improve dispersion and prevent aggregation of the resident nanoparticles. In this study, the researchers used the transient plane source (TPS) technique to ...

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Thermal Conductivity Enhancement for Aqueous Alumina Nano-Suspensions in the Presence of Surfactant

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A series of Al2O3-water nanofluids were synthesized and their thermal conductivities were evaluated under different pH values and concentrations of surfactant (SDBS) using the Hot Disk Thermal Constants ...

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Study on dispersion behavior and thermal conductivity of Cu-H2O nanofluids

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The addition of Cu nanoparticles to water was studied at different pH values and different dispersant concentrations by the measurement of zeta potential and absorbency. Thermal conductivity was measured by ...

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