Visoko tehnološko razvito poliamidno pletivo s superhidrofobnimi, oleofobnimi in samočistilnimi lastnostmi

Vidas, Andreja (author), Simončič, Barbara (mentor), Vasiljević, Jelena (comentor)

V tem diplomskem delu je bil preučevan učinek obdelave poliamidnega (PA) pletiva s postopkom sol-gel, na razvoj visokotehnolopke tekstilije z zaščitnimi lastnostmi. V izdelavo visoko tehnološkega poliamidnega pletiva so bili vključeni trije glavni postopki, ki so si sledili v naslednjem vrstnem redu: postopek apretiranja sol-gel z uporabo v naprej pripravljenih delcev SiO2, in situ sinteza delcev SiO2 v prisotnosti pletiva ter apretiranje s komercialnim perfluoriranim oligosiloksanskim sredstvom (FAS) po impregnirnem postopku. Vzorci so bili za določanje pralne obstojnosti tovrstne apreture oprani z enim (1PC) in štirimi pralnimi cikli (4PC). Obdelanim in neobdelanim vzorcem so bile določene morfološke, kemijske in mehansko-fizikalne lastnosti, ki so bile izmerjene z vrstično elektronsko mikroskopijo (SEM), infrardečo spektroskopijo s Fourerjevo transformacijo (FT-IR), merjenjem zračne prepustnosti ter pretržne trdnosti. Učinek apreture na vodo- in oljeodbojne lastnosti je bil ovrednoten na podlagi meritev statičnih stičnih kotov vode in n-heksadeksana ter kotov zdrsa kapljic vode s površine vzorcev. Rezultati so pokazali, da sta se pretržna trdnost in zračna prepustnost končnega obdelanega pletiva (vzorec PA+SP+IS+FAS) nekoliko zmanjšali v primerjavi z neapretiranim vzorcem. Tristopenjski postopek obdelave pletiva PA je omogočil doseganje statičnih stičnih kotov kapljice vode nad 140° in n-heksadeksana nad 130°. Tovrstna visokotehnološka obdelava poliamidnega (PA) pletiva se izkaže kot učinkovita pri podeljevanju zaščitnih vodoodbojnih ter še posebno oleofobnih lastnostih ter je kot rezultat podelila pletivo z zelo dobrim približkom »Lotusovega učinka«. Barvna razlika med apretiranimi in neapretiranimi vzorci ostaja praktično minimalna, pride namreč do zanemarljive potemnitve pri apretiranih vzorcih.

• Language: Slovenian
• Keywords: Poliamid, zaščitne lastnosti, superhidrofobnost, oleofobnost, sol-gel, delci SiO2.
• Work type: Bachelor thesis/paper
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Year: 2019
• PID: 20.500.12556/RUL-107101
• Publication date in RUL: 28.03.2019

VIDAS, Andreja, 2019, Visoko tehnološko razvito poliamidno pletivo s superhidrofobnimi, oleofobnimi in samočistilnimi lastnostmi [online]. Bachelor’s thesis. [Accessed 22 March 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=107101

Secondary language

• Language: English
• Title: High technology polyamide knit fabric with superhydrophobic, oleophobic and self-cleaning properties

Abstract

This diploma thesis aimed to study the effect of the sol-gel treatment of polyamide (PA) knit fabric on the developement of the high-tech textile with the protective properties. Fabrication of the high-tech polyamide knit fabric included three following procedures: sol-gel treatment with the pre-prepared SiO2 particles, in situ synthesis of SiO2 particles in the presence of the knit fabric, and coating with commercial perfluorinated siloxane agent (FAS) by a pad-dry-cure process. In order to investigate the washing fastness, samples were subjected to one (1PC) and four washing cycles (4PC). The morphological, chemical and mechanical-physical properties of untreated and treated samples were evaluated by scanning electron microscopy (SEM), infrared spectroscopy by Fourier transform (FT-IR), and measurements of air permeability and tensile strenght. The effect of apreture on the water and oil repellency was evaluated by measurements of static contact angles of water and n-hexadecane droplets, and water sliding (roll-off) angles. The results showed that air permeability and tensile strenght of the final treated knit fabric slightly decreased, compared to the untreated sample. The three-step modification process enabled the achievement of the static contact angle of water and n-hexadecane higher than 140° and 130°, respectively. This high-tech modification process of the PA knit fabric enables effective fabrication of the protective highly hydrophobic and highly oleophobic properties with good washing fastness and with performance close to the »Lotus effect«. The color difference between the treated and non-treated samples remains practically minimal, with neglible darkening in the treated samples.

• Keywords: Polyamide, protective properties, superhydrophobicity, oleophobicity, sol-gel, SiO2 particles.