Home / Knowledge / News / Textiles / Chinese chemist turns cotton into super fabric
Chinese chemist turns cotton into super fabric
11
Apr '15
Courtesy: ACS Nano
Courtesy: ACS Nano
Superprotective garb for withstanding both flood and fire is on the horizon now that Chinese chemists have come up with a self-healing, triple-dip coating that turns cotton flame resistant and waterproof , according to media reports.
 
Flame-retardant fabric coatings, found on children’s pajamas and furniture fabrics, often wash away, says Junqi Sun of Jilin University, in China. Sun wondered whether adding a waterproof coating would extend the life of water-soluble fire retardants. He decided to test the idea with an especially durable waterproof coating his group had been working on: a superhydrophobic surface that heals itself.
 
Superhydrophobic surfaces, such as those found on duck feathers and lotus leaves, repel water with roughness at the micro- and nano-scale. In addition, they combine that texture with exposed molecules with low surface energy. Sun’s group achieved superhydrophobicity the same way, by topping a porous undercoat with a rough skin of aggregated, cagelike molecules: fluorinated-decyl polyhedral oligomeric silsesquioxane (F-POSS) molecules. F-POSS’s long, fluorinated alkyl chains are water averse, and its aggregated cages are spiky, which gives water droplets the brush-off.
 
The coating’s self-healing capacity comes from additional F-POSS molecules embedded in the porous undercoat. When the rough surface gets nicked, the opening allows in water from the air, driving underlying F-POSS molecules to fill in and restore the hydrophobicity of the exposed surface.
 
Sun’s team sandwiched a fire retardant in between the waterproof coating and cotton, choosing a combination of the polyelectrolytes ammonium polyphosphate (APP) and branched poly(ethylenimine) (bPEI). Like a burning marshmallow, the combination blocks the transfer of heat and oxygen by swelling, forming a char, and releasing inert gases to push the oxygen away.
 
After dipping cotton samples in APP, bPEI, and then F-POSS, Sun’s group tested the coating by holding a flame to the bottom of a 30-cm-long vertical strip of fabric for 12 seconds. Untreated cotton burned away in 14 seconds, yet no more than 4 cm of the treated cotton burned before the flame extinguished itself.
 
Sun intends the coating for military clothing and other fabrics that must withstand harsh conditions. (SH)
 

Fibre2fashion News Desk - India

Must ReadView All

President Tsai Ing-wen delivering remarks before boarding her plane bound for Central America. Courtesy: Presdient's office

Textiles | On 16th Jan 2017

‘Textiles at centre of Taiwan’s new trade arrangements’

Textiles should be at the heart of Taiwan’s thinking while developing ...

Apparel/Garments | On 16th Jan 2017

Ralph Lauren develops policy on tracking wood based fabrics

In a bid to trace source of wood based fabrics like viscose and rayon ...

Apparel/Garments | On 16th Jan 2017

EC proposes enhanced market access for Sri Lanka

The European Commission (EC) has proposed that a significant part of...

Interviews View All

Priyanka
Studio Priyanka Rajiv

‘To reinvent the age-old tradition of embroidery to suit demographics and...

Evelyne Cholet
UCMTF

‘France had a reputation of being big in new ideas, but poor in marketing...

Abhishek Ganguly
Puma India

‘As a brand, Puma is always looking for new and innovative ways to inspire ...

Paolo Ocleppo
Sandvik Hyperion

Paolo Ocleppo, Rotary Cutting Segment manager, Sandvik Hyperion discusses...

Ashok Desai
Bombay Textile Research Association

Bombay Textile Research Association (BTRA) is a leading name in textile...

Marcel Alberts
Eurofibers

Coating at a fibre level is a practice not usually seen in the...

Wendell Rodricks
Wendell Rodricks

"We should not compare India and the West. There are things we do that...

Igor Chapurin
Chapurin

"Now we can see the Russian trend in international fashion. And Russian...

Sonam & Paras Modi
SVA

Sonam and Paras Modi's Sva Couture is synonymous with head-turning...

Press Release

Press Release

Letter to Editor

Letter to Editor

RSS Feed

RSS Feed

Submit your press release on


editorial@fibre2fashion.com

Letter To Editor






(Max. 8000 char.)

Search Companies





SEARCH
January 2017

January 2017

Subscribe today and get the latest update on Textiles, Fashion, Apparel and so on.

SUBSCRIBE


Browse Our Archives

GO


eNEWS
Insights
Subscribe today and get the latest News update in your mail box.
Advanced Search