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Effect Of Dyeing On Wrinkle Properties Of Cotton Cross-Linked By Butane Tetracarboxylic Acid (BTCA) In Presence Of Titanium Dioxide (TiO2) Nanoparticles

Hezavehi E., Shahidi S., Zolgharnein P.

Autex Research Journal

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2015

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Vol. 15, no. 2

104--111

EN

This study evaluates the wrinkle behaviour and wrinkle resistant properties of cotton fabrics dyed by Direct Blue 2B in the presence and absence of nano-TiO2 particles. A finishing process on samples was performed before dyeing by means of 1,2,3,4-butanetetracarboxylic acid (BTCA) and sodium hypophosphite (SHP) using a pad dry cure method. Such experiments as wrinkle recovery test (AATCC-128), water drop test and dye fastness determination (ISO 105-C01) were conducted to understand how current treatment impacted the cotton fabrics’ properties. Finally, samples were characterised using the X-ray diffractometery method to scrutinise how crystallinity changes and dominates the structural parameter (wrinkle behaviour) of cotton fabrics. Furthermore, scanning electron microscopy (SEM) was used to visualise the surface variations of the samples before and after dyeing process. The results showed that the wrinkle resistant of cross-linked fabrics have been improved after direct dyeing. Furthermore, levelness dyeing and good fastness properties of dyes on cross-linked fabrics were observed.

2

Investigation and Modelling of Stress Relaxation on Cylindrical Shell Woven Fabrics: Effect of Experimental Speed

Hezavehi E., Azadiyan M., Zolgharnein P.

Fibres & Textiles in Eastern Europe

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2013

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Vol. 21, no. 6 (102)

64--73

EN

This paper evaluates the effects of experimental speeds (22, 24 and 26 m/min) on woven fabrics' stress relaxation behaviour in a cylindrical form under constant torsional strain. Worsted woven fabrics were put under experimentation with identical specifications along the warp direction such as yarn density, fabric construction and fibre content, However the structural parameters were somewhat different in the weft direction. The experiments were conducted using the method established by Hezavehei, et.al (2011) and the stress relaxation behaviour of specimens at three speeds of a spiral shaft which can hold samples tightly in a cylindrical form and automatically rotate were investigated. According to the results obtained, with increasing the speed of fabric rotation around the main shaft, the quantity of stress relaxation percent decreases. The effect of experimental speed on the stress relaxation behaviour is differently reported for the warp and weft directions due to the variety of structures along each individual direction. Regarding this, the reduction in the torsional strain recovery of samples in the weft direction is significantly more than that in the warp direction. In fact, the stress relaxation behaviour is likely to be related to the physical and viscoelastic properties of fibre, yarn and fabric. Hence the experimental data were fitted with two well known viscoelastic models such as an ordinary Maxwell's and three component Maxwell's model with a parallel connected nonlinear spring. The results were fairly justified by curve fitting of experimental data with the three component Maxwell's model including a parallel connected nonlinear spring. Furthermore non-linear behaviour was observed from experimental validation with a remarkable correlation coefficient.

PL

Badano tkaniny z przędz czesankowych przy jednakowych warunkach struktury wzdłuż kierunku osnowy, jak gęstość tkaniny, struktura tkaniny i zawartość różnych włókien w przędzy, natomiast parametry wzdłuż wątku wykazywały zróżnicowanie. Badania prowadzono zgodnie z metodą opracowaną przez Hezavehei (2011). Wyniki badań wykazały, że przy wzroście prędkości relaksacji wartość relaksacji zmalała. Wykazano, że istnieje zróżnicowanie relaksacji naprężeń torsyjnych w kierunkach osnowy i wątku. Zachowanie się tkanin przy relaksacji naprężeń jest ściśle związane z lepko-sprężystymi właściwościami badanego materiału. Wyniki badań interpretowano za pomocą dwóch modeli: zwykłego modelu Maxwella i trójskładnikowego modelu Maxwella z równolegle połączonymi elementami sprężystymi. Uzyskano dużą zgodność wyników z trójskładnikowym modelem Maxwella.

3

Morphological, thermal and mechanical properties of nanostructured materials based on polypropylene/poly (trimethylene terephthalate) blended fibers and organoclay

Hezavehi E., Bigdeli A., Zolgharnein P.

Materials Science Poland

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2012

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Vol. 30, No. 2

82--91

EN

The crystallization morphologies, thermal behaviors and mechanical properties of PP/PTT/nanoclay blends nanocomposite fibers were investigated. Polypropylene/poly (trimethylene terephthalate) blends containing montmorillonite (MMT) were prepared using a twin screw extruder followed by fiber spinning process. The melt intercalation of PP and PPT alloys was carried out in the presence of a compatibilizer such as maleic anhydride-g-polyropylene (MAPP). The results show the improved adhesion between the phases and fine morphology of the dispersed phase. It has contributed to significant improvement in the properties and thermal stabilities of the final nanocomposite materials. A general understanding of how the morphology is likely to be related to the final properties of organically modified montmorillonite (OMMT)-incorporated PP/PTT blends is also described.

4

Study of BTCA and Nano-TiO2 Effect on Wrinkle Force and Recovery of Cotton/Polyester Blended Fabric

Azad A., Hezavehi E., Shahvazian M., Zolgharnein P.

Fibres & Textiles in Eastern Europe

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2012

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Vol. 20, no. 5 (94)

60--65

EN

In this study the wrinkle force and recovery, elongation, strength, Poisson's ratio and initial modulus of cotton/polyester blended fabric (65/35%) have been investigated. Different samples were considered after being treated by 1,2,3,4-butane tetra carboxylic acid (BTCA) and sodium hypophosphite (SHP) catalyst mixed with nano-titanium dioxide(TiO2) as a co-catalyst by the pad-dry curing method. The wrinkle behaviour of the samples treated was assessed by a wrinkle force tester in addition to an Italian Mesdan tensile teste, and wrinkle recovery tester AATCC128, meanwhile their surfaces were evaluated by scanning electron microscopy (SEM). The results show that utilising the treatment substances led to wrinkle recovery improvement; in addition, the wrinkle force, Poisson's ratio and initial modulus were also increased. On the other hand, it is observed that tensile properties in both directions (weft and warp) of the woven fabrics were decreased. Furthermore, a different observation was induced for each direction of the woven fabrics through considering the orthotropic feature, wrinkle force and recovery.

PL

Badano siły przy marszczeniu, powrót do stanu wyjściowego, wydłużenie, wytrzymałość, współczynnik Poissona i moduł początkowy tkanin mieszankowych bawełniano-poliestrowych. Próbki poddano obróbce za pomocą kwasu 1,2,3,4-butano tetrakarboksylowego (BTCA) i hypofosforanu sodu (SHP) zmieszanych z TiO2. Pomiary wykonano za pomocą specjalistycznej aparatury przeznaczonej do badania pofałdowań tkanin. W wyniku stosowania podanej apretury uzyskano znaczną poprawę zachowania tkanin przy marszczeniu, połączone to było z obniżeniem ich wytrzymałości. Dodatkowe badania przeprowadzono dla stwierdzenia stopnia ortotropowości tkanin.