1、Multifunctional properties of cotton fabric treated with chitosan and carboxymethyl chitosan,By Xiuli Yang 2014/05/14,Outlines,Background Achievement Experimental Conclusion & Discussion,Background,Chitosan has got wide application in textile dyeing and finishing as a substitute for the various chem

2、icals used in textile processing. It has been used as a pretreatment agent in dyeing of cotton, in textile printing,wool dyeing and shrink proofing and in durable press finish. However, the application of chitosan in textiles is limited due to its poor solubility above pH 6.5 Another major problem i

3、s its poor durability on cotton textile due to lack of strong bonding forces between the two polysaccharides 。,Achievement,It was hypothesized that if a water soluble chitosan derivative could be developed it can lead to development of a multifunctional finish. Cotton can be made antimicrobial,its d

4、yeability can be modified or enhanced and treatment with chitosan can also impart wrinkle recovery property to it.,1.Materials,Experimental,1. Preparation, characterization and water solubility of carboxymethyl chitosan,4. Antimicrobi-al activity of treated cotton fabric samples,2. Testing antimicro

5、-bial activity in solution,3. Treatment of fabric with chitosan,5. Physical properties of treated cotton fabric samples,6. Dyeability study on treated cotton fabric samples,2.steps,Dyeing cycles for (a) direct dyes, (b) reactive dyes, (c) acid dyes and (d) basic dyes (*sodium carbonate alkali (A) is

6、 divided into two and added at 10 min interval at two points, *pH adjusted using acetic acid).,3.Dyeing process,Results and discussion,A concentration of 1gpl corresponding to 0.50.6% add-on could be considered as the optimum for application on cotton fabric for high antimicrobial activity. All treated samples showed much higher wrinkle resistance as compared to control sample. Dye exhaustion as well as the wash fastness of dyes improved after the treatment .The percent exhaustion of dyes a