THE 3
rd
INTERNATIONAL SCIENTIFIC CONFERENCES OF STUDENTS AND YOUNG RESEARCHERS
dedicated to the 99
th
anniversary of the National Leader
of Azerbaijan Heydar Aliyev
331
Since surfactants are amphiphilic materials with hydrophobic and
hydrophilic parts, they absorb at the interface of oil-water. Surfactants are
usually categorized according to their polar head as the hydrophobic tails are
usually similar. Non-ionic surfactant has an uncharged head group while
anionic and cationic surfactants have negative
and positive head groups,
accordingly. Due to the placement of surfactant molecules at the oil-water
interfaces, the interfacial surface tension is reduced which causes the oil to
dilute in water [2]. As a result, an increase in the interfacial surface area
between oil and water leads to oil degradation.
In this research, surfactants obtained from carboxylic acids and amines,
changes in their surface tensions according
to the concentrations of
surfactants are studied.
Results
. As reactants, nonylamine (C
9
H
17
NH
2
), acetic acid (CH
3
COOH)
and formic acid (HCOOH) are used. Both reactions occur at 50-60
o
C and
atmospheric pressure. The products of the reactions are the salt of
nonylamine and formic acid and the salt of nonylamine and acetic acid,
respectively.
𝐶 𝐻 − 𝑁𝐻 + 𝐻𝐶𝑂𝑂𝐻 → 𝐶 𝐻 − 𝑁𝐻 𝑂 𝑂𝐶𝐻
𝐶 𝐻 − 𝑁𝐻 + 𝐶𝐻 𝐶𝑂𝑂𝐻 → 𝐶 𝐻 − 𝑁𝐻 𝑂 𝑂𝐶𝐶𝐻
Sigma Tensiometer was used to determine the surface tensions of the
products to prove that obtained products are surfactants. In this research,
surfactants gained from
carboxylic acids and amines, changes in their
surface tensions according to the concentrations of surfactants are studied
and illustrated in the given figures below.
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