EFFECT OF MICROWAVE ASSISTED ENZYMATIC PRETREATMENTS ON REACTIVE DYEINGS OF COTTON KNITTED FABRICS

Year 2018, Volume: 1 Issue: 2, 65 - 72, 31.12.2018

Hacer Özgen , Mahire Cihangirova , Burcu Yılmaz Şahinbaşkan

Abstract

Microwave energy is an
alternative method for pre-treatments, dyeing and finishing of textile
materials. It is fast, uniform, effective and energy efficient heating.  Using enzymes for pre-treatment of cotton
fabrics have also many advantages over conventional processes such as reducing
the chemical damage to the fabric, energy saving and short process times.
Nowadays, with the increase in importance of cleaner production techniques,
sustainability and carbon footprint for the textile industry microwave-assisted
enzymatic pre-treatment is became an important topic.

In this research study, the
effect of microwave-assisted pre-treatments with pectinase, cellulase and
laccase enzymes on dyeability of cotton knitted fabric was investigated.
Therefore, cotton knitted fabrics were pre-treated with sodium hydroxide,
pectinase, cellulase and laccase enzymes by conventional and microwave-assisted
methods.  All fabrics were conventionally
dyed with reactive dye after pre-treatments. Hydrophilicity, contact angle,
whiteness/yellowness indexes of conventionally and microwave-assisted
pre-treated fabrics were measured and compared with the conventionally treated
samples with sodium hydroxide. The absorbency of the all pre-treated samples
were checked in accordance with AATCC 79-2007 Method, and the wetting time was
found to be less than 60 seconds. Whiteness and yellowness results were
adequate for dark-coloured (dyeing or printing) fabrics. The dyed cotton
knitted fabrics after different pre-treatments were examined for colorimetric
measurement results and dry-wet rubbing/ colour staining-colour change washing
fastness properties. The fabrics were dyed successfully with C.I.Reactive Black
5 (Remazol Black B [Dystar]. Microwave-assisted pre-treated fabric samples with
sodium hydroxide, pectinase and cellulase enzymes were dyed dark colours.
Pre-treated fabric samples were dyed more dark colours than microwave-assisted
pre-treated fabric samples. The pilling test results (4+) and colour fastness
to dry-wet rubbing (4-5 +) / colour staining-colour change washing (4-5 +) of
the dyed fabric samples were investigated and adequate results were obtained.
The time saving was almost 90 % by microwave heating. In the light of these
results, it is clear that microwave-assisted pre-treatment process can be an
important alternative to conventional pre-treatment method. In addition short
processing times were contributed to sustainability and reduction of carbon
footprint.

 

Keywords

Microwave energy, Pectinase, Cellulase, Laccase, Reactive dye, Cotton fabric

PAMUKLU ÖRME KUMAŞLARIN REAKTİF BOYARMADDELER İLE BOYANMASINA MİKRODALGA ENERJİSİ YARDIMI İLE UYGULANAN ENZİMATİK ÖN İŞLEMLERİN ETKİSİ

Abstract

Mikrodalga
enerjisi tekstil materyallerinin ön işlem, boyama ve bitim işlemleri için
alternatif bir metottur. Hızlı, uniform, etkili ve ısıtma enerjisi verimlidir.
Pamuklu kumaşların ön işlemlerinde enzimlerin kullanımı da konvansiyonel
yöntemler ile karşılaştırıldığında kumaşta daha az hasar, enerjiden tasarruf ve
kısa işlem süreleri gibi birçok avantaja sahiptir. Günümüzde, tekstil
endüstrisinde temiz üretim tekniklerinin öneminin artması ile mikrodalga
enerjisi yardımı ile enzimatik ön işlemlerin gerçekleştirilmesi önemli bir konu
haline gelmiştir.  

Bu çalışmada,
pektinaz, selülaz ve lakkaz enzimleri ile mikrodalga enerjisi yardımıyla ön
işlemlerin pamuklu örme kumaşların boyanmasına etkisi araştırılmıştır.
Konvansiyonel olarak ve mikrodalga enerjisi yardımı ile ön işlem gören
kumaşların hidrofilite, temas açısı ve beyazlık/sarılık indeksleri ölçülmüş ve
sodyum hidroksit ile konvansiyonel olarak işlem gören örnekler ile
karşılaştırılmıştır. Farklı ön işlemlere tabi tutulduktan sonra boyanan pamuklu
örme kumaşların renk ve haslık özellikleri incelenmiştir. Kumaşlar C.I.Reactive
Black 5 ile başarılı şekilde boyanmıştır. Boncuklanma test sonuçları ve
sürtünmeye/yıkamaya karşı renk haslık test sonuçları kabul edilebilir
değerlerde bulunmuştur. Ön işlemde mikrodalga enerjisinin kullanımı işlem
sürelerinde yaklaşık % 90 oranında tasarruf sağlamıştır.

Keywords

Mikrodalga enerjisi, Pektinaz, Selülaz, Lakkaz, Reaktif boyarmadde, Pamuklu kumaş

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