Cairan Ionik Baru Dari Biological Buffer: Sintesis Dan Properti Termofisik

Mustain, Asalil (2013) Cairan Ionik Baru Dari Biological Buffer: Sintesis Dan Properti Termofisik. Masters thesis, Institut Teknologi Sepuluh Nopember.

Text 2311201010-Master Thesis.pdf - Accepted Version Restricted to Repository staff only Download (20MB) | Request a copy

Abstract

Dua cairan ionik baru dibuat dari biological buffer (N-(2- hydroxyethyl)piperazine-N′-(3-propanesulfonic acid) (EPPS) atau 3- (cyclohexylamino)-1-propanesulfonic acid (CAPS)) dengan tetramethylammonium hydroxide (TMA) telah disintesis dengan metode netralisasi asambasa sederhana. Struktur molekul dari dua cairan ionik ini ([TMA][EPPS] dan [TMA][CAPS]) dikonfirmasi dengan menggunakan analisis nuclear magnetic resonance (NMR). Stabilitas termal dan titik lebur dari cairan ionik ditentukan dengan menggunakan thermal gravimetric analysis (TGA) dan differential scanning calorimetry (DSC). Kandungan air dalam cairan ionik diukur dengan titrasi Karl Fischer. Properti termofisik seperti densitas, ekspansi termal, apparent molar volume, kelarutan, viskositas, konduktivitas dan konduktivitas molar, dari larutan ionik biner antara [TMA][EPPS] dan [TMA][CAPS] dengan air atau pelarut organik telah ditentukan pada rentang suhu dan konsentrasi tertentu dibawah tekanan atmosfer. Beberapa persamaan korelasi sebagai fungsi suhu atau konsentrasi digunakan untuk mengkolerasi data properti fisik tersebut seperti persamaan polinomial untuk densitas, persamaan Vogel-Fulcher-Tammann untuk viskositas, persamaan Casteel-Amis untuk konduktivitas dan persamaan Debye-HückelOnsager untuk konduktivitas molar. Sebagai tambahan, plot Walden digunakan untuk menggambarkan ionicity dari cairan ionik. Dua cairan ionik baru ini ditemukan larut dalam air dan pelarut organik seperti metanol dan etanol. Sehingga, dua cairan ionik baru ini dapat diaplikasikan untuk aplikasi yang lebih luas dalam sistem yang mengandung air maupun pelarut organik.
===================================================================================================================================
Two new ionic liquids derived from biological buffers, N-(2- hydroxyethyl)piperazine-N′-(3-propanesulfonic acid) (EPPS) or 3- (cyclohexylamino)-1-propanesulfonic acid (CAPS), with tetramethylammonium hydroxide (TMA) have been synthesized by simple acid-base neutralization method. The molecular structures of these two ionic liquids, [TMA][EPPS] and [TMA][CAPS], were confirmed by using nuclear magnetic resonance (NMR) analysis. The thermal stabilities and the melting points of the ionic liquids were determined by using thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC) techniques, respectively. Water contents in the prepared ionic liquids were measured with Karl Fischer titration. The physical properties, including density, thermal expansion, apparent molar volume, solubility, viscosity, conductivity, and molar conductivity, of the binary ionic solutions of [TMA][EPPS] and [TMA][CAPS] with water or organic solvents have been determined over wide temperature and concentration ranges under atmospheric pressure. Several correlated equations as a function of temperature or concentration were used to fit the physical properties data which are a polynomial equation for density, the Vogel-Fulcher-Tammann equation for viscosity, the Casteel-Amis equation for conductivity, and the Debye-HückelOnsager equation for molar conductivity. In addition, the Walden plot was used to represent the ionicity of ionic liquids. These two new ionic liquids were found to be soluble in water and in organic solvents, such as methanol and ethanol. As a consequence, these two new ionic liquids could be applied to broad applications in which the systems containing either water or organic solvents

Item Type:	Thesis (Masters)
Additional Information:	RTK 660.297 22 Mus n
Uncontrolled Keywords:	Cairan ionik, biological buffer, sintesis, properti termofisik.
Subjects:	Q Science > QD Chemistry
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Chemical Engineering > 24101-(S2) Master Thesis
Depositing User:	Mr. Tondo Indra Nyata
Date Deposited:	22 Jul 2024 01:46
Last Modified:	22 Jul 2024 01:46
URI:	http://repository.its.ac.id/id/eprint/108587

Actions (login required)

View Item