Georgian Scientists/ . 6 N 3, 2024 350 Georgian Scientists Vol. 6 Issue 4, 2024 https://doi.org/10.52340/gs.2024.06.04.30 1 , 2 , 3 , 4 , 5 , 6 1 , , , - e-mail zazajavar@gmail.gom ORCID ID: https://orcid.org/0009-0006-3839-9880 2 , , - e-mail: 75bibileishvili@gmail.com ORCID ID: https://orcid.org/0009-0003-7712-2436 3 , - e-mail: nanagogesashvili@gmail.com ORCID ID: https://orcid.org/0000-0001-5140-5815 4 5 6 5200P(PES) ( ) PES- 15%- , 10% PEG 300, PEG 600 5% LiCl . FTRI . , LiCl - . (1985 2 ) PES /PEG 600/ LiCl/ DMAc . : , , PEG, LiCl, . [1]. . , [2]. Georgian Scientists/ . 6 N 3, 2024 351 , [3,4,5]. 100 55 - 24 . ( ) 15%- PES/ DMAc. (Biolar). 5% LiCl 10% PEG300 PEG600. PES/ DMAc/LiCl, PES/DMAc/PEG300, PES/DMAc /PEG600. PES/DMAc/LiCl PEG300 PEG600. LiCl/PEG300 LiCl/PEG600 . (Zetasizer Nano Zen 3690- Malvern Instruments) . 1. , , 25 . P1- P6 . . FTRI (BRUKER) , (SPM, Certus standart V, Nano Can technologies Ltd). . , 5.972 0.8332 , PEG- LiCl - . FTRI . 2 PES/DMAc/PEG600/LiCl . Georgian Scientists/ . 6 N 3, 2024 352 1636 -1 2. 1578 -1 1460 -1, . ( ) 1280- 1150 -1, ( ) 1483 -1 1510 -1, (O=S=O) 1151 -1, 833 -1 CH- . 2. PES /PEG 600/ LiCl/ DMAc ) P6 ( ) . FTRI 4,5. PES/ DMAc P1 ( 4), . 4. P1 5. P6 P6 , , , PEG600/LiCl . 15%- 1. C:\SPEKTRY\ N\P 4.0 P 4 Instrument type and / or accessory C:\SPEKTRY\ N\# 2.0 # 2 Instrument type and / or accessory 10/07/2024 10/07/2024 30 12 .3 7 29 31 .6 3 28 76 .6 0 16 25 .1 6 15 76 .4 8 15 50 .5 7 14 86 .9 8 13 94 .4 2 13 57 .4 2 13 21 .5 0 12 99 .3 1 12 63 .8 4 12 39 .6 8 11 87 .2 6 11 51 .2 7 11 04 .6 0 10 60 .8 5 10 12 .1 8 96 4. 96 87 2. 62 84 4. 55 74 2. 40 72 0. 46 70 1. 78 58 9. 44 56 0. 46 47 3. 18 500100015002000250030003500 Wavenumber cm-1 0. 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 0. 7 Ab so rb an ce U ni ts Page 1/1 Georgian Scientists/ . 6 N 3, 2024 353 1. 15%- . % 300, % 600, % LiCl, % , , 2 PES/ DMAc 87 - - - P1 0,1 991 PES/ DMAc /LiCl 82 5 P2 0,09 1321 PES/ DMAc /PEG300 82 10 P3 0,08 1486 PES/ DMAc /PEG600 82 10 P4 0,07 1545 PES/DMAc/PEG300/LiCl 77 10 5 P5 0, 11 1624 PES/DMAc/PEG600/LiCl 77 10 5 P6 0,09 1985 , P1- LiCl- P2 PWF ( , ) , P3, P4, , PEG300- PEG600- . P5, P6 . PES/DMAc/PEG600/LiCl . 1. L. G. Tiron, . C. Pintilie, M. Vlad, I. G. Birsan, . Balta, Characterization of Polysulfone Membranes Prepared with Thermally Induced Phase Separation, IOP Conf Ser Mater Sci Eng, Gala i, Romania, 2017. 2. K. Gonzaga, J. C. Mierzwai,Comparison between Two Polyethersulphone Concentrations in Hollow Fiber Ultrafiltration Membranes. Is It Worth to Use More Polymer? Eclét Quím, 46 (1), 52 (2021). 3.T. A. Otitoju, A. L. Ahmad, Recent Advances in Hydrophilic Modification and Performance of Polyethersulphone (PES) Membrane via Additive Blending. RSC Adv, 40, 22710 (2018). 4.B. Thurmer, P. M. Poletto, M. Marcoli, J. M. Duarted, M. Zeni, Effect of Non-solvents Used in the Coagulation Bath on Morphology of PVDF Membranes. JMR, 15 (6), 884 (2012). 5.J.Lin, C. L. Cheng, F. M. Huang, L. P. Cheng, Effect of Salt Additive on the Formation of Microporous Poly(vinylidene fluoride) Membranes by Phase Inversion from LiClO4/water/DMF/PVDF System. Polymer, 44, 413 (2003). 6. ,. ., ., ., ., . , .100,1 78-81, 2024,. Georgian Scientists/ . 6 N 3, 2024 354 Preparation and research of natural water ultrafiltration membranes based on polyethersulfone 1Zaza Javashvili, 2George Bibileishvili, 3Nana Gogesashvili, 4Elene Kakabadze, 4Mzia Kezherashvili, 5Tinatin Butkhuzi Engineering Institute of Membrane Technologies of Georgian Technical University Abstract Polyethersulfone microfiltration membranes were successfully obtained from casting compositions of 15% polyethersulfone in DMAc. PEG 300, PEG 600 and LiCl were used as additives. The influence of the additives on the characteristics of the membranes was studied in detail both separately and in the complex. DLS of the solutions, as well as FTIR analysis of the solutions and obtained membranes were performed. It was determined that the simultaneous use of additives has a more significant effect on the characteristics of membranes than the use of each additive separately. The membrane precipitated from the PES /PEG 600/ LiCl/ DMAc pouring solution was the best in terms of structure and producttvity index (1985 L/m2h) among the obtained membranes. keywords: ultrafiltration, polyethersulfone, PEG, LiCl, productivity.