Self-cleaning Property of Tencel Fabric by Air Plasma and Cross-Linking Treatment Based on TiO2/SiO2 Sol-Gel Method

TS59; The ionic cross-linking treatment with 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CHTAC) and 1,2,3,4-butanetetracarboxyfic acid (BTCA) was treated on untreated and plasma treated Tencd fabrics,and then TiO2/SiO2 sol was applied to the treated samples.Self-cleaning characteristic was investigated using the color measurement spectrophotometer with 7 h UV irradiation.Moreover,the surface morphology,structure change of samples were observed by scanning electron microscopy (SEM) and Fourier transform infrared spectrescopy (FTIR),respectively.The results revealed that with the increase of CHTAC concentration,breaking strength of Tencel fabric increased,whiteness index decreased,and wrinkle recovery angle first dropped and then rose.It was also found that incxeasing concentration of BTCA,breaking strength of Tencel fabric decreased,whiteness index and wrinkle recovery angle increased.FTIR studies revealed that CHTAC and BTCA had grafted on Tencel fabric.Nevertheless,the molar ratio of 50∶1 of TiO2/SiO2 sol endowed Tencel fabric with better self-cleaning properties,compared with sample treated with pure TiO2.Furthermore,compared with sample treated with TiO2/SiO2 sol alone,the combination of plasma and cross-linking treatment (plasma + CHTAC + BTCA + TiO2/SiO2) decreased the value of K/S,and increased the value of AE,ensured more efficient photodegradation of methylene blue,and thus got a better performance of self-cleaning.