Georgian Scientists/ . 6  N 3, 2024 360

Georgian Scientists

Vol. 6  Issue 4, 2024

https://doi.org/10.52340/gs.2024.06.04.32

1 , 2 , 3 , 4 , 5

, 6

1 ,  - e-mail: nanagogesashvili@gmail.com ORCID ID:

https://orcid.org/0000-0001-5140-5815
2 , , - e-mail:

75bibileishvili@gmail.com ORCID ID: https://orcid.org/0009-0003-7712-2436

 15%-  ( ) 
) ( /LiCl ) 

. -
 20

 50 . , 
.

N1- N8 .

 (SPM, Certus standart V, Nano Can technologies Ltd).
50  

.
: , , , ,

.

-,
. 

, 
.

, .
, 

, 
. , 



Georgian Scientists/ . 6 N 3, 2024 361

. 
 [1]. 

. 
,

. 
, . 

, 
, -

. 

.
, , 

[2,3].

, 
, 

- 
. 

 15%- ) 
) /LiCl. 100  55  -

, 24 . 
, , 

 pH . .  20  50 
. N1- N8 , 

. 
 (SPM, Certus  standart  V, Nano Can

technologies Ltd).  1 /LiCl. 
.



Georgian Scientists/ . 6 N 3, 2024 362

 1. /LiCl 
.

, ,
2

20 N1 1,1 789
+KOH 20 N2 1,3 801

 +K2 CO3 20 N3 1,41 845
+CH 3COOH 20 N4 1,66 974

50 N5 0,9 980
+ KOH 50 N6 1,2 901

 +K2 CO3 50 N7 1,5 991
+CH 3COOH 50 N8 1,6 1123

,  20
, 50 , , 

50 .  K2CO3

. 
, . /LiCl

 20 ,  50 
.  1,2,3,4

 50 
.

 1.  N 5  2.  N6

 3.  N 7  4.  N8



Georgian Scientists/ . 6 N 3, 2024 363

 N8 
,  N6  pH-  N 7

. .
,  pH-

.
,  pH -

 50 .

 1. Aqnieszka K.Holda, ivo F.J.Vankelecom, Understanding and quigind the phase inversion process
 for synthesis of solvent resistant nanofiltration membranes, J. Appl. Polym. Sci. 2015, 132.

 2. Rosario Cervellere,Xianghong Qian, David M.Ford,Christina, Carbello,Sal Giglia, Paul
 C.Millett, Phase-field modeling of non-solvent induced phase separatio (NIPS) for
 PES/NMP/Water with comparison to experiments ,Journal of MembranE Science v.619, 2021.
3. Liana F. Padilha1 and Cristiano P. Borges PVC membranes prepared via non-solventinduced

 phase separation process, Brazilian Journal of Chemical Engineering Vol. 36, No. 01, pp. 497
 - 509, 2019.
 4. Preparation and Characterization of Membranes Formed by Nonsolvent Induced Phase
 Separation A Review Gregory R. Guillen, Yinjin Pan, Minghua Li, and Eric M. V. Hoek* r | Ind.
 Eng Chem. Res, 2011, 50, 3798–3817
 5. Song Zhao, Zhi Wang,Jiziao Wang, Shichang Wang, The effectof pHof coagulation bath on
 tailoring the
 morphologyand separation performance of polysulfone/polyaniline ultrafiltration membrane ,
 Journal of membrane Science, 469, 316-325
 6. Cristin Rina Ratri, Tegar BudiAguta, Annisaa Hayya Arundati, Rohib Rohib, Mochamad
 Chlid, Sotya Astutiningsh, Adam Febriyanto Nugraha, Effect of Coagulation Bath
 Composition on Cellulose-Based Polymer Electrolyte Fabrcated via Non-Solvent-Induci
 Ptas Separation Method,IJtec Vol14, N7, (2023).



Georgian Scientists/ . 6 N 3, 2024 364

Study of the influence of the basic-acidic nature of the non-solvent on the
characteristics of membranes obtained by phase inversion

1Nana Gogesashvili, 1George Bibileishvili, 3Liana Ebanoidze, 4Elene Kakabadze, 5Zaza Javashvili,
6Tinatin Butkhuzi

Engineering Institute of Membrane Technologies of Georgian Technical University

Abstract
 In the paper, a 15% polyamide (PA) polymer composition obtained in lithium chloride
dimethylacetamide (DMAc) ( PA/DMAc/LiCl ) was used to create new filtration membranes. The role
of the basic-acidic nature of the non-solvent in the deposition of membranes by the phase inversion
method at 20  and 60  was investigated. It is established that both the composition of the non-
solvent and the temperature have a significant effect on the characteristics of the obtained membranes.
Pore sizes of N1-N8 membranes are determined by bubble point method. And the morphology and
structure of the membranes were studied with a scanning probe microscope (SPM, Certus standart V,
Nano Can technologies Ltd). Among the obtained membranes, the better productivity and surface
topography was found for the membrane precipitated in acidified water at 50 .

keywords: membrane, Coagulation Bath, phase inversion, non-solvent, productivity.