Preparation of Color-Changing Textile with pH Indicators Produced by Sol-Gel Method

Smart textile was developed in this paper,which could change color according to the p H value, meanwhile keep the flexibility,breathability,light weight and large cover of textiles. In this study p H sensitive fabrics were prepared by sol-gel method with two common p H indicators methyl red（ MR） and bromocresol green（ BCG）. The finished textiles present different halochromic behaviors with different dyeing methods. The oragic-inoragnic network,identified by Fourier transformed infrared spectrum（ FTIR） and solid state nuclear magnetic resonance（ NMR）,plays a key role in holding stability against leaking,and the cell viability keeps pace with the leaking process. The interaction between the gel matrix and indicators depends on the charges and size of guest molecules.