Riego de adherencia 65

FABRİCS

Zeynep OMEROGULLARI BASYIGIT

Usak University Faculty of Engineering Textile Engineering Department, 1 Eylul Campus, Usak, TR

[email protected] ABSTRACT

The treatment of polyester fabric in alkali medium is a common chemical modification process for producing a fabric with desirable qualities such as soft cloth, fabric regain, water absorbency, and fabric pilling with draping. However, if the optimization of the chemical treatment was not maintained, there could be serious decrease in mechanical strength of polyester fabrics. In this study, surface modification by low temperature plasma treatment (<50 0C) were used as an alternative to chemical modification of polyester fabrics with alkaline treatment and the effects of both chemical and surface modification on mechanical and chemical properties of polyester fabrics were investigated. Parameters of chemical modification such as exposure time and concentration of alkali were varied while different exposure time was used in plasma application as a surface modification treatment. Performance tests such as mechanical strength, loss of weight and hydrophilicity of polyester fabrics were tested after each modification. Scanning electron microscope (SEM) micrographs were taken as well. According to the test results; loss of weight of polyester fabrics after chemical modification was more than occurred right after surface modification. Advantages of surface modification on polyester fabrics were clearly seen in this study, especially when compared to high concentration alkali treatment. It was also considered that these functionalized polyester fabrics could be used as an alternative platform for 3DP (three-dimentional printing) applications before deposition of the polymers.

Keywords: Alkaline treatment, surface modification, polyester fabrics, plasma application

ÖZET

Polyester kumaşların alkali ortamda işlem görmesi kumaşların yumuşak tutum, hidrofilik karakter kazanması, dökümlü bir kumaş haline gelmesi gibi istenen özelliklere sahip olmasını sağlayan alışılmış bir uygulamadır. Fakat yapılan bu kimyasal modifikasyon işleminin parametreleri optimize edilmediğinde, polyester kumaşların mekanik mukavemetlerinde ciddi düşüşler görülebilmektedir. Bu çalışmada, düşük sıcaklıkta yapılan (<50 0C) plazma aplikasyonu ile yüzey modifikasyon işlemi; polyester kumaşların kimyasal modifikasyon işlemlerine bir alternatif olarak kullanılmıştır ve her iki modifikasyon işleminin polyester kumaşların mekanik ve kimyasal özelliklerine olan etkileri incelenmiştir. Süre ve konsantrasyon gibi kimyasal modifikasyon işleminin parametreleri çeşitlendirilirken, yüzey modifikasyon işleminde kumaşlar farklı plazma işlem sürelerine tabi tutulmuştur. Her iki modifikasyondan sonra, polyester kumaşların mekanik özellikleri, hidrofilite değerleri ve ağırlık kayıpları gibi performans değerleri incelenmiş, taramalı elektron

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mikroskobu (SEM) görüntüleri alınmıştır. Test sonuçlarına göre; kimyasal modifikasyondan sonra kumaşlarda oluşan ağırlık kaybı plazma işlemi ile yapılan yüzey modifikasyonu işlemine oranla daha fazla olmuştur. Bu çalışmada, özellikle yüksek konsantrasyonda yapılan alkali işleme göre; polyester kumaşlara uygulanan yüzey modifikasyon işleminin pek çok avantajı görülmüştür. Fonksiyonelleştirilmiş bu polyester kumaşların üç boyutlu baskı uygulamalarında polimer aktarılmadan önce alternatif bir platform olarak kullanılabileceği düşünülmüştür.

Anahtar Kelimeler: Alkali işlem, yüzey modifikasyonu, polyester kumaş, plazma işlemi

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