Biomaterials, Biodegradables and Biomimetics Research Group

Papers in Scientific Journals

Synthesis and Physical and Thermodynamic Properties of Lactic Acid and Malic Acid-Based Natural Deep Eutectic Solvents

Abstract

In this paper, four natural deep eutectic solvents (NADES) systems were prepared at specific molar ratios, La:Bet (2:1) (lactic acid/betaine), La:Hist (9:1) (lactic acid/histidine), Ma:Bet:H 2 O (1:2:3) (malic acid/betaine/water) and Ma:Bet:Pro:H 2 O (1:1:1:2) (malic acid/betaine/proline/water). Their physical and thermodynamic properties were studied, namely viscosity, electrical conductivity, and heat capacity. The viscosity and electrical conductivity were determined as a function of temperature and the correlation for the temperature dependence was obtained and discussed based on Arrhenius theory. The heat capacity for all eutectic systems was measured by differential scanning calorimetry (DSC) over a temperature range of 293.15−363.15 K. The ability of these NADES to reduce cellulose crystallinity was evaluated. Cellulose crystallinity after suspension in these NADES was studied by X-ray diffraction. Cellulose suspended in Ma/Bet/H 2 O (1:2:3) suffer the highest crystallinity reduction among the systems studied and was about of 20%.

Journal
Journal of Chemical and Engineering Data
Volume
63
Issue
7
Pagination
2548-2556
Publisher
ACS
ISSN
1520-5134
URL
https://pubs.acs.org/doi/10.1021/acs.jced.7b01037
Keywords
Natural deep eutectic solvents, Physical properties, thermodynamic properties
Rights
Restricted Access
Peer Reviewed
Yes
Status
published
Project
Dez.Zyme
Year of Publication
2018
DOI
10.1021/acs.jced.7b01037
Date Published
2018-06-19
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