Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Dyeing easier : new potential for dyeing polyester with chitosan

31.05.2012
Najua Tulos and co-researchers of the Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), Shah Alam, studied the potential of chitosan to dye polyester fabric. Produced commercially by removing the acetyl groups from chitin (a derivative of glucose), chitosan was found to greatly improve the colourfastness of polyester fabrics.

Polyester is a man-made fibre that is extensively produced in factories for clothing and home furnishings.


Commercial chitosan is derived from the shells of shrimp and other sea crustaceans, including Pandalus borealis, pictured here.

Indeed, polyester has taken the world by storm. Its wide use reflects its range of pleasing properties, high resilience, stretch and recovery; good strength and dimensional stability; it is also highly wrinkle resistant. The insoluble nature of polyester fibres when exposed to water also limits enzymatic hydrolysis to the surface, thus improving the fibre surface wettability.

However, polyester does not take dye well. That is, it is not easy to colour polyester. Polyester fibres have definitive hydrophobic character and high degree of crystallinity, thus being difficult to penetrate with dyes.

Disperse dye is the only effective dye for polyester and usually done at a high temperature (about 130ºC) in order to increase the dye up-take.

This research studied the potential of chitosan to dye polyester fabric at lower temperatures.

In the experiment, the white polyester fabric surface was treated with chitosan by exhaustion method, pad-dry-cure and ultrasound. The treated fabrics were then dyed with reactive dyes at low temperature. The colourfastness to washing, colourfastness to perspiration, colourfastness to rubbing/crocking and colourfastness to light were evaluated to measure the colour change and staining.
It was found that the dyed polyester had excellent colourfastness to washing with a rating between 4/5 and 5 for colour change, and 4/5 and 5 for staining. This was made possible as the surface of polyester was treated with chitosan solution. The chitosan made it dyeable even under lower temperatures.

They concluded that reactive dyes have higher affinity for polyester fibres after the fabric surface being treated.

Contact:

Najua Tulos
Eryna Nasir
Wan Yunus Wan Ahmad

Faculty of Applied Sciences
Universiti Teknologi MARA (UiTM)
Shah Alam, Malaysia

Email: najua@salam.uitm.edu.my

Megawati Omar | Research asia research news
Further information:
http://www.uitm.edu.my
http://www.researchsea.com

More articles from Materials Sciences:

nachricht Successful Mechanical Testing of Nanowires
07.12.2017 | Helmholtz-Zentrum Geesthacht - Zentrum für Material- und Küstenforschung

nachricht Nature's toughest substances decoded
05.12.2017 | Rice University

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

Im Focus: Successful Mechanical Testing of Nanowires

With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong

Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...

Im Focus: Virtual Reality for Bacteria

An interdisciplinary group of researchers interfaced individual bacteria with a computer to build a hybrid bio-digital circuit - Study published in Nature Communications

Scientists at the Institute of Science and Technology Austria (IST Austria) have managed to control the behavior of individual bacteria by connecting them to a...

Im Focus: A space-time sensor for light-matter interactions

Physicists in the Laboratory for Attosecond Physics (run jointly by LMU Munich and the Max Planck Institute for Quantum Optics) have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe the motions of electrons in atoms.

The most basic of all physical interactions in nature is that between light and matter. This interaction takes place in attosecond times (i.e. billionths of a...

Im Focus: A transistor of graphene nanoribbons

Transistors based on carbon nanostructures: what sounds like a futuristic dream could be reality in just a few years' time. An international research team working with Empa has now succeeded in producing nanotransistors from graphene ribbons that are only a few atoms wide, as reported in the current issue of the trade journal "Nature Communications."

Graphene ribbons that are only a few atoms wide, so-called graphene nanoribbons, have special electrical properties that make them promising candidates for the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

Blockchain is becoming more important in the energy market

05.12.2017 | Event News

 
Latest News

Making fuel out of thick air

08.12.2017 | Life Sciences

Rules for superconductivity mirrored in 'excitonic insulator'

08.12.2017 | Information Technology

Smartphone case offers blood glucose monitoring on the go

08.12.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>