Physicochemical properties of betaine monohydrate-carboxylic acid mixtures

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Abstract

Green solvents are widely used to minimize environmental problems associated with the use of volatile organic solvents in many industries. DES are new green solvents in recent. The physicochemical properties of DES can be varied by properly combining of salts with different hydrogen bond donors. The objective of this work is to investigate the effect of varying molar ratios on the physicochemical properties of betaine monohydrate-carboxylic acid (i.e,. propionic or acetic acid) mixtures. Properties of mixtures were measured at 40°C. The viscosity, polarity scale (ENR), density, pH, and water content tend to decrease with the decrease in a molar ratio of betaine monohydrate to acid. Conversely, the ionic conductivity was increased. The physicochemical properties of these mixtures depend on the hydrogen bonding interactions between betaine, water and acid molecules. Betaine monohydratecarboxylic acid mixtures have wide range of polarity, low viscosity, high ionic conductivity, and density higher than 1 g•cm-3 that make them fit for numerous various applications. Additionally, due to these mixtures have acidic pH, it should be properly selected of metal type to minimize corrosion problems in industrial application.

Original languageEnglish
Article number012017
JournalIOP Conference Series: Materials Science and Engineering
Volume358
Issue number1
DOIs
Publication statusPublished - 22 May 2018
Event3rd International Conference on Global Sustainability and Chemical Engineering, ICGSCE 2017 - Putrajaya, Malaysia
Duration: 15 Feb 201716 Feb 2017

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