【正文】 ase with the increase in thepH value.. Processing methodsThe sequences were illustrated in Table 1. In Fig. 7,the crease recovery angles of the samples ?rstly ?nished with BTCA (Methods 1, 3 and 5) were higherthan those ?rstly treated with silica sol (Methods2, 4 and 6). That might be because with Methods 1, 3 and 5, BTCA could better crosslink withthe fabrics. Whereas with Methods 2, 4 and 6,for the obstruction of the silica sol, BTCA could280260240220200with BTCA ?nishing solution was directly paddedwith silica sol solution. The BTCA available forcrosslinking with the fabric was much lesser andwas likely to weaken the e?ect of the anticrease?nishing.In Fig. 8, samples treated with Methods 1 and 2seemed to have much lower tensile strengths thanother processes. This might be attributed to thetwo times of curing. When curing at 160?C, theglucopyranosyls of cellulosic macromolecular chainsbegan to dehydrate, the degree of the cellulosicmacromolecular chains decreased and the numbersof the carbonyls and the carboxyl increased. Thesewould result in the decrease of the tensile strength.However, pared to the one only treated withBTCA, the tensile strength of the sample treatedwith Method 1 was also increased by about %for the existence of the silica ?lm anchored on thesurface of the fabric. Compared to Method 1, inthe existence of MPTS, silica ?lm in Method 2could better crosslink and anchor to the fabric. Thesilica ?lm had positive e?ect in improving the tensile strength of the fabric. The samples treated withMethods 5 and 6 under the conditions of one timeof drying and one time of curing had better tensile680670660650640630180123456620123 456MethodFig. 7. E?ect of processing methods on the crease recovery angles of fabrics treated with MPTS mol/L, concentration of the sol 100% and pH of the sol 9.MethodFig. 8. E?ect of processing methods on the crease recovery angles of fabrics treated with MPTS mol/L, concentration of the sol 100% and pH of the sol 9.Tensile strength/NCrease recovery angle/176。ottcher, J. Sol–GelSci. Technol. 1–3 (2004) 219.19. A. Bozzi, T. Yuranova, I. Guasaquillo, D. Laub andJ. Kiwi, J. Photoch. Photobio. A 2 (2005) 156.20. C. X. Wang and S. L. Chen, Appl. Surf. Sci. 18(2006) 6348.21. T. Textor, T. Bahners and E. Schollmeyer, MelliandTextil. 10 (1999) 847.22. C. Schramm, W. H. Binder and R. Tessadri, J. Sol–Gel Sci. Technol. 29 (2004) 155.。ottcher, J. Sol–Gel Sci. Technol.27 (2003) 43.12. C. X. Wang, M. Li, G. W. Jiang, K. J. Fang andA. L. Tian, Res. J. Text. Apparel 3 (2007) 27.13. Z. X. Li, Y. J. Xing and J. J. Dai, Appl. Surf. Sci. 7(2008) 2131.14. B. Mahltig, F. Audenaert and H. B168。Tensile strength/NTensile strength/NSurface Treatment of AntiCrease Finished Cotton Fabric Based on Sol–Gel Technology719Table 2. E?ect of concentrations of the sol on the abrasion resistances of fabrics treated with MPTS mol/Land pH of the sol 8.Wloss/g/m2 (10?4 )280260240Cycles40123456722020080345678910 11120200DestroypHFig. 5. E?ect of pH values on the crease recovery angles1: Virgin (Anticrease ?nished cotton fabric)。 anticrease ?nishing。 cotton fabric。7186606402602506202406005800 230406080100120Dosage of MPTS/mol/LFig. 2. E?ect of dosages of MPTS on the tensile strengths of fabrics treated with concentration of the sol100% and pH of the sol 8.the existence of many hydroxyl groups, the forcesbetween the macromolecular chains of cotton ?berssuch as the hydrogen bonds are very strong. Whenthere is an external force, the breaking could ?rstoccur in the bonds in the internal of the molecularchains of amorphous areas but not the bonds betweenthe macromolecular chains. That means that cottonConcentration of the sol/%Fig. 3. E?ect of concentrations on the crease recoveryangle of fabrics treated with MPTS mol/L and pHof the sol 8.640620600580560fabric is broken for the breaking but not the slip406080100120page of molecular chains. Furthermore, the formedtransparent ?exible threedimensional silicon oxide?lm on the fabric and the conglutination between the?bers enhanced the forces between the macromolecular chains. Thus, the movements of macromolecular chains conglutinated were restricted and unevendistribution of internal stress which mostly concentrated to the molecular chains of the amorphousareas occurred. This resulted in a decline in strength.When the external force was strong enough, thebond in the internal of the molecular chains of amorphous areas was broken and t