Beta cyclodextrin in Wrinkle Recovery Finishing

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Beta cyclodextrin in Wrinkle Recovery Finishing

  1. 1. Use and determination of beta cyclodextrin on textile substrates Bojana Vončina University of Maribor, Textile Department, Smetanova 17, 2000 Maribor, Slovenia ITSAPT seminar, Guimaraes, November 2005
  2. 2. Structure and dimensions of cyclodextrins ITSAPT seminar, Guimaraes, November 2005
  3. 3. Conical structure of β cyclodextrin ITSAPT seminar, Guimaraes, November 2005
  4. 4. Host–guest complex of β cyclodextrin and toluene ITSAPT seminar, Guimaraes, November 2005
  5. 5. Applications of β cyclodextrin in textile:Application methods (Surface modification): modification) Exhausting method Pad-batch method PrintingWashingPreparation of polymersIn fibre spinningSurface modificationEncaptulation ITSAPT seminar, Guimaraes, November 2005
  6. 6. Polycarboxylic acids like 1,2,3,4butanetetracarboxlic acid (BTCA) are well knownnonformaldehyde crosslinking reagents. BTCA hasfour carboxylic acid groups, which can react withhydroxyl groups of cellulose and form stable esterbonds Esterification can occur with heat alone or itcan be accelerated by the presence of salts of weakacids, such as sodium hypophosphite (SHPI).Physical properties of cotton fabrics treated withBTCA were comparable with those obtained forcotton treated with the most effective N-methylolreagents such as N, N’-dimethyloldihydroxy-ethylene-urea (DMDHEU) ITSAPT seminar, Guimaraes, November 2005
  7. 7. Grafting of β-cyclodextrin on cotton using polycarboxylic acid COOH O O C H C C H C O O COOH ITSAPT seminar, Guimaraes, November 2005
  8. 8. • Mercerised cotton, immersed in treated baths• Wet pick up 100%• Predried at 110 º C, 10 minutes• Fixation at 170 º C, 3 minutes• Washed in cold water and at 60 º C 30 minutes Concentration Concentration of Concentration Curing of β-CD in BTCA in of SHPI in temperature finished bath finished bath finished bath (g/ (º C) (g/l) (g/l) l) 20 6 3 170 20 6 6 170 30 6 3 170 30 6 6 170 30 6 6 200 ITSAPT seminar, Guimaraes, November 2005
  9. 9. β-cyclodextrin molecules linked to textile substrate can be determined qualitatively by Phenolphthalein and Phenol red. Alkaline solution of Phenolphthalein changes colour from carmine red for untreated textile substrate to colourless for BTCA/β-CD treated textile materials. Phenol red forms a yellow coloured complex with β-CD, so Phenol red changes colour from red to yellow when β-CD is present at the textile substrate.These qualitative methods can be use for white textilematerials only. ITSAPT seminar, Guimaraes, November 2005
  10. 10. 20 g/l β-CD, 6 g/l BTCA, 3 g/l SHPI c(CD) pH 0 (g/l) 20 (g/l) washed in cold washed at water 60º C 3 c(CD) pH 0 (g/l) 20 (g/l) washed in cold washed at water 60º C 12 ITSAPT seminar, Guimaraes, November 2005
  11. 11. 30 g/l β-CD, 6 g/l BTCA, 3 g/l SHPI c(CD) pH 0 (g/l) 30 (g/l) washed in cold washed at water 60º C 3 c(CD) pH 0 (g/l) 30 (g/l) washed in cold washed at water 60º C 12 ITSAPT seminar, Guimaraes, November 2005
  12. 12. 30 g/l β-CD, 6 g/l BTCA, 6 g/l SHPI c(CD) pH 0 (g/l) 30 (g/l) washed in cold washed at water 60º C 3 c(CD) pH 0 (g/l) 30 (g/l) washed in cold washed at water 60º C 12 ITSAPT seminar, Guimaraes, November 2005
  13. 13. Quantitative determination of linked β-CD Gravimetrical method The objective of the present study has been to develop semi-quantitative method for the evaluation of β-CD fixed onto the textile materials by UV/Vis spectroscopy using alkaline solution of phenolphthalein. ITSAPT seminar, Guimaraes, November 2005
  14. 14. amountC pH ABS AF-ADF ∆A D (mL) (550 nm) brez 11,35 0,9624 0,9624-0, 0 9624 1 11,35 0,7400 0,9624-0, 0,2224 7400 2 11,38 0,6341 0,9624-0, 0,3283 6341 3 11,36 0,4576 0,9624-0, 0,5048 4576 4 11,36 0,3729 0,9624-0, 0,5895 3729 5 11,35 0,3482 0,9624-0, ITSAPT 0,6142 seminar, Guimaraes, November 2005 3482
  15. 15. O H2C C O Cell HC COOH HC COOHConversion of H2C C O CDcarboxylic acid groups Oto carboxylate anions alkaline treatmentAfter-treatment of BTCA/CD finishedcotton fabrics with alkaline solutionseparate ester carbonyl band from Ocarboxylic acid band H2C C O Cell - HC COO Na+ HC COO- Na+ H2C C O CD O ITSAPT seminar, Guimaraes, November 2005
  16. 16. ATR FT-IR spectroscopy of nanoencaptulated cotton 99,0 98 97 96 95 1 724,80 94 93 1 567,1 7 92 1 639,31%T 91 90 89 88 87 86 85 84,1 2000,0 1950 1900 1850 1800 1750 1700 1650 1600 1550 1500 1450 1400 1350 1300 1250 1200 1150,0 cm-1 99,9 98 96 1 71 1 ,45 94 92 1 561 ,83 90 88 %T 86 1 41 4,88 84 82 80 78 76 74 ITSAPT seminar, Guimaraes, November 2005 73,0 4000,0 3600 3200 2800 2400 2000 1800 1600 1400 1200 1000 800 600,0 cm-1
  17. 17. Mechanism of grafting with policarboxylic acids  O H2C C H2C COOH O HC COOH HC C + Cell-OH -H2O O HC COOH O + CD-OH HC C H2C COOH O H2C C O COOH O O Cell O C CH2 CH CH CH2 C O CD COOH ITSAPT seminar, Guimaraes, November 2005
  18. 18. Conclusions We successfully grafted β-cyclodextrin onto cellulose substrate by using crosslinking reagent BTCA. In our research the rapid and simple spectroscopic method for determination of micro-amount of cyclodextrin in solution was adopted to determine the amount of β-cyclodextrin bonded onto the textile material. ITSAPT seminar, Guimaraes, November 2005

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