Aura Herbal Textiles Limited Get Combined Privileges at Unusual Price Make your product a global brand - Make your brands desirable
   Home >  Articles  >  Dyes and Chemicals


Ionic crosslinking of cotton
By  : Peter J. Hauser, C. Brent Smith, Mohamed M. Hashem

 Free Download  |     Email Article |  Discuss Article |  Print Article |  Rate Article

Chitosan is obtained by alkaline hydrolysis of the naturally occurring polysaccharide chitin (Figure 2).

 

Experimental


Anionic cellulose was produced with various carboxymethyl content (up to 125 mmol per 100 g fabric) by a method similar to those previously reported [1, 2, 5, 6, 7, 8]. Bleached cellulosic fabric was impregnated with 20% aqueous NaOH for 10 minutes at room temperature, followed by padding to a wet pickup of 100%. Samples were dried at 60oC. These alkali-treated samples were then steeped for 5 minutes at room temperature in aqueous solutions of chloroacetic acid that had been neutralized with sodium carbonate at various concentrations (0 to 3.0 M). These samples were then squeezed to 100% wet pickup, sealed in plastic bags and heated at 70oC for 1 hour. The samples were then washed and dried at room temperature. Blanks were included. This produced 7 different levels of carboxymethylation, i.e. 6.15, 30.2, 60.7, 87.1, 97.3, 114.5, and 123.7 mmols of carboxymethyl groups per 100 grams of fabric, as determined by titration.

 

Cationic chitosan was produced by the reaction of 85% N-deacetylated chitin with 3-chloro-2-hydroxypropyl trimethyl ammonium chloride using a method that differed somewhat from the method previously reported by Kim et al. [3]. 161 grams of 85% N-deacetylated chitin was slurried in 1156 grams of 69% w/w solution of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride. NaOH (50% w/w) was added dropwise to maintain pH of 10 to 11. The slurry was stirred overnight; then the temperature was raised to 95oC for 4 hours, cooled to room temperature and adjusted to pH 7 with acetic acid. The resulting reaction product was soluble in the reaction mixture. When recovered by drying, the resulting product was easily re-dissolved in room-temperature water at pH 7.


To accomplish the ionic crosslinking, cationized chitosan was applied to the anionic cellulosic fabrics by padding through solutions of cationized chitosan in water at 100% wet pickup, then drying at 105oC. Various concentrations of cationic chitosan were used in the padding bath, i.e. 0, 0.5, 2, 4, and 6% solution concentration.


Materials


The materials used are presented in Table I.

 

All chemicals were used as received.

 

1 2 3 4 5  ]    



Latest Comment

really nice information, with stringent norms for textiles and formaldehyde release this info is very useful
 navnath

 
 Free Download  |     Email Article |  Discuss Article  |  Print Article |  Rate Article
    Bookmark This Article To Your Favorite Bookmarking Sites   Bookmark and Share

Product Focus
NanoSphere by Schoeller Technologies AG VIBRA-PLUS by Osthoff-Senge Gmbh

Article Category
  Textile
  Technology
  Industry
  Apparel
  General
  Fashion
  Retail
  Technical Textiles
  Leather, Footwear & Jewellery
  Software
  Dyes & Chemicals
  Handloom and Handicraft
  Machinery

Submit Your Article
Contributor's Profile
Contributor's Login
Subscribe for Newsletter
RSS Feeds
Disclaimer
Find Buyer/Seller of:
Find Used Machinery Buyer/Seller:
Dyes
Buying / Selling Offers
Calcium Hypochlorite
Solvent Dyes
Wrinkle resistance
More
Top 5 Dyes Buyer
India, Pakistan, Bangladesh, Turkey, China
View All Buyers
Top 5 Dyes Seller
India, China, Taiwan, Turkey, Iran
View All Sellers

Latest Articles
Glorious String to your Hand-Bracelets  
Small Brands, Big Canvas  
Performance Apparels sees hype in the Global Market  
Buying Apparel Fabric-8 Critical Points to Remember  
'Bandhani'- The Tie and Dye Process  
Recession and Luxury - The Global Market
Lean manufacturing To restrict cheap imports
Submit Articles about your products and services - Get them published as Featured Articles
Most Downloaded Articles
Quality Requirements for Hosiery ...
Moisture Management and ...
Lean Rationale for ...
Indian Textile and Clothing Sector Poised for a ...
Evaluation of Industrial Dyeing Wastewater Treatment with ...

Disclaimer | About Us | Enquiry | Sitemap | Our Services | Feedback / Comments | Internet Rank
Copyright © 2009.
All rights reserved by
Sanblue Enterprises Pvt. Ltd.
For best view:
Use Internet Explorer 5.0+,
Screen resolution 1024 x 768
ICICI Payment Gateway
Secure Merchant
ISO 9001 certified