【正文】 ge 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 recoveryangle.Figure 2 showed that the tensile strengthdecreased with increasing dosage of MPTS. ForCrease recovery angle/176。 strength loss.1. IntroductionCotton fabrics shrink and wrinkle easily due to theshift and deformation of cellulose macromoleculesafter repeated wet N , N dimethylol4,5dihydroxyethyleneurea (DMDHEU) had beenthe most widely used crosslinking agent in textile industry to provide cotton fabrics in the anticrease ?nishing owing to the ether linkages formedbetween DMDHEU and the cellulose molecules. Thetime desirable mechanical stability properties weregiven and the potential to release formaldehyde,a known human carcinogen, was also ,3Signi?cant decrement but not avoidance in therelease of formaldehyde could be obtained by etherifying DMDHEU or by continuing to treat the?nished fabric with hydrolyzed glycidyloxypropyltrimethoxysilane (GPTMS) Another ?nishing agent, 1, 2, 3, 4butanetetracarboxylic acid(BTCA) catalyzed with sodium hypophosphite(SHP) can provide an alternative possibility forthe formaldehydefree crease resistant –7However, the serious strength loss due to depolymerizations and crosslinkings of the cellulose macromolecules is one reason for its relatively small marketSol–gel technology is a chemical processing basedon hydrolysis and subsequent condensation of metalor semimetal It is conducted at a lowtemperature which also enables the incorporationof organic pounds into the inorganic structure without The sol–gel processhas been recognized as an excellent technologicalapproach for coating textiles to impart new andfrequently multifunctional properties to the samples, such as water and oil repeling, UV radiationprotection, antimicrobial property, selfcleaning andcontrolled release of –20 Applications ofsilicone coating technology can be seen in sleeping bags, paragliding, hotair balloons and highperformance The e?ects of silica sol?Corresponding author.715?716treatment on the properties of the cotton fabric werepreviously reported, and it was found that sol–geltreatment could remarkably increase the abrasionIn this paper, BTCA ?nished cotton fabrics weretreated with silica sol to improve the decreased tensile strength in the anticrease ?nishing. E?ects of theparameters on the crease recovery angle, the tensilestrength and the abrasion resistance were discussedin detail to obtain the better cotton fabric sol treatment conditions.2. Experimental. MaterialsThe cotton fabric (weight g/m2). BTCAand SHP were available from Herst International Group. Tetraethoxysilane (TEOS),ethanol (EtOH), γmethacryloxypropyltrimethox ysilane (MPTS) and the anhydrous sodium carbon ate were supplied bySinopharm Chemical Reagent Co., Ltd. Thehydrochloride and the ammonia were obtained fromSinopharm Shanghai Chemical Reagent Co.. Preparation of silica solCertain amounts of TEOS were added to the mixtureof EtOH and di?erent amounts of MPTS, followed byadding deionized water and catalyst. The molar ratioof TEOS, EtOH and H2O was 1:6:5. The mixtureswere stirred with a magnetic stirring apparatus andkept in a concussing water bath kettle for 6 h forsu?cient reactions.. Anticrease ?nishingBTCA (100 g/L) and SHP (50 g/L) were added toa given amount of deionized water and the result. Silica sol treatmentAnticrease ?nished cotton fabrics were impregnatedwith the prepared silica sol for 2 min, followed bypadding twice to a wet pickup of about 80%. Thetreated fabrics were then predried at 80?C for 4 minand cured at 160?C for 3 min.. Crease recovery anglemeasurementThe cotton fabrics were conditioned at 20?C and 65%. for 24 h and tested on the machine YG(B)541Daccording to ISO 2313:1972. Fabrics were creased and pressed under controlled conditions of time and load. After removal of the creasing loads, the angles formed between 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 I