【正文】 ween the limbs were Five samples weremeasured in the warp direction and ?ve in the ?ll direction. The values presented were the sums of each average warp and ?ll values.. Tensile strength measurementAccording to ISO 139341:1999, the cotton fabricswere conditioned at 20?C and 65% . for 24 hprior to testing on the machine YG(B). The tensile strengths were averages of each three measurements in the warp direction.. Abrasion resistancemeasurementThe abrasion resistance was measured according toISO 5470. The samples were mounted in a specimen holder, subjected to a de?ned load, and rubbedagainst a standard fabric in a translational movement on the machine YG522. The abrasion resistance property was denoted by the Wloss value,ing mixture was stirred until plete dissolutionoccurred. The cotton fabrics were impregnated withWloss = W0 ? W1/S(1)the mixture for 2 min at room temperature andthen padded twice to a wet pickup of about 80%with a laboratory pad mangle obtained from Labortex Co., Ltd., Taiwan. The treated fabrics werepredried at 80?C for 4 min and cured at 160?C for3 min.where Wloss was the weight loss per square meter(g/m2), W0 was the weight before the experiment,W1 was the weight after the experiment and S wasthe abrasive area of the sample (20 cm2). The Wlossvalues were inversely proportional to the abrasionresistance.Surface Treatment of AntiCrease Finished Cotton Fabric Based on Sol–Gel Technology717No.Table 1.Di?erent processing Methods.Processing Method123456PaddedPaddedPaddedPaddedPaddedPaddedthethethethethetheanticrease ?nishing bath → Dried → Cured → Padded the silica sol bath → Dried → Curedsilica sol bath → Dried → Cured → Padded the anticrease ?nishing bath → Dried → Curedanticrease ?nishing bath → Dried → Padded the silica sol bath → Dried → Curedsilica sol bath → Dried → Padded the anticrease ?nishing bath → Dried → Curedanticrease ?nishing bath → Padded the silica sol bath → Dried → Curedsilica sol bath → Padded the anticrease ?nishing bath → Dried → Cured. Treatment methodsIn order to investigate the e?ect of the processingmethods of the two times of ?nishing on the physicalproperties of the cotton fabrics, samples were treatedwith di?erent methods illustrated in Table 1.3. Results and Discussion. Dosage of MPTSMPTS in the reaction system might play the roles ofpromoting the hydrolyzed TEOS to polycondensate,crosslinking the polycondensated polymer ?lm withthe cotton fabric or conglutinating the macromolecular chains of cotton ?bers or all.Figure 1 demonstrated that the crease recoveryangle was dependent on the dosage of MPTS. Itwas clear that the value increased severely whenthe increase in the MPTS dosage was from to mol/L. This enhancement could be interpretedin terms of all roles of MPTS. Firstly, hydrolyzedTEOS polycondensated rapidly and formed highdegree polymers in the presence of MPTS. Secondly,formed polymers were crosslinked to the fabrics also255250245240235with MPTS. Thirdly, the macromolecular chainsof cotton ?bers were conglutinated by MPTS too.The higher the dosage of MPTS added, the higherthe degree of the polymerization。 more polymerswere anchored to the fabric and more macromolecular chains were conglutinated. The polymers crosslinked to the fabrics formed a transparent ?exiblethreedimensional silicon oxide ?lm. The fabric wasbended for the excuse of external forces. When theapplied force was withdrawn, the internal stressesbetween the macromolecular chains trend the fabric to restore its original shape. The conglutinatingimproves the forces between the macromolecularchains. The anchored ?lm also improved the forcesdue to its ?exibility and its crosslinking with thefabric. So increasing the dosage of MPTS couldimprove the ability of restoring from deformation,thus enhancing the crease recovery angle. Theremight be another explanation: the capacity of outerforce resistance could be improved by the bendingrigidity which corresponded to the diameter of ?ber.MPTS worked as a bridge which made hydrolyzedTEOS aggregate mutually. The higher the dosage ofMPTS added, the greater the amount of the polymer anchored on the fabric, the thicker the diameter of ?ber. This results in stronger bending rigidity,stronger capacity of outer force resistance and highercrease recovery angle. When the MPTS dosage wasincreased further, the enhancement in the creaserecovery angle was very small. It had likely reached asaturated value. The dosage of mol/L was probably enough to aggregate hydrolyzed TEOS, anchorthe ?lm onto the ?bers and conglutinate the macro0molecular chains of ?bers. Dosage in excess wouldDosage of MPTS/mol/LFig. 1. E?ect of dosages of MPTS on the crease recoveryangles of fabrics treated with concentration of the sol100% and pH of the sol.not make signi?cant e?ect on the crease rec