This project belongs to the field of textile chemistry and dyeing and finishing technology. In recent years, the application of nanotechnology and the development of functional textiles have attracted widespread attention. How to uniformly disperse nanoparticles and firmly combine them with fibers is the key. However, there has been no successful development of large-scale production of nanocomposite multifunctional textiles. Relevant reports. Shanghai University of Engineering Technology cooperates with Shanghai Bada Textile Printing and Garment Co., Ltd., Shanghai Longtou Home Textile Co., Ltd., and Shanghai Automobile Carpet Factory Co., Ltd., taking scientific research as the guide and based on technological innovation, integrating the advantages of various scientific research and industrialization, and has developed the application technology and production technology of modified nano titanium dioxide in functional finishing of textiles, solving the problem of uniform dispersion of nanoparticles on fibers and strong combination with fibers. It has also achieved large-scale production of nano-composite multifunctional textile products. This project has been funded by the Nano Project of Shanghai City Science and Technology Development Fund, the Scientific Research Development Fund of Shanghai City Education Commission and Enterprise Industrialization Research, and has passed the appraisal and acceptance. The main innovations are: (1) Developed a "one-step" hydrolysis preparation technology for nano titanium dioxide, and chemically modified it by introducing active groups such as hydroxyl, amino, and siloxy groups and incorporating transition metal elements, effectively improving the reactivity of nanoparticles and fibers and its dispersion stability in the aqueous phase;(2) Developed a feasible finishing process for modified nano titanium dioxide on textiles, determined key technical parameters for industrialization, developed durable photocatalyst functional textiles, solved the problem of degradation of photocatalytic textile products, and improved the performance of finished fabrics, Processing methods and actual production. There is a good mutual confirmation;(3) In order to evaluate the photocatalytic properties of functional textiles, an online VOC detection system and a small environmental simulation test cabin were developed for the first time at home and abroad, and standard testing conditions were determined. The system continuously tests and records data at a speed ten times faster than traditional methods. To tens of times, and has multiple functions such as qualitative or quantitative evaluation and monitoring of purifying materials and pollution-releasing materials;(4) Using water-dispersed nano titanium dioxide surface active group modification technology, a series of fabric photocatalyst, antibacterial, and anti-ultraviolet multifunctional finishing agents have been developed, and a nano photocatalyst fabric finishing agent production device with an annual output of more than 120 tons has been formed., and a production base for nano multifunctional textile and garment fabrics, household textiles, and automobile interior fabrics has been established. The nano-functional textiles developed in this project have been tested to meet the standards of international AATCC and national textile testing agencies. After expert technical appraisal and scientific and technological novelty search, this project is the first in China, is novel and practical, and has reached the international advanced level. The project's core technology has applied for 6 national invention patents, including 3 authorizations, 1 utility model authorization, 19 high-level papers have been published, 4 papers have been included in SCI and EI, 3 engineers and 7 master's students have been trained, and won the gold medal and second prize in the Shanghai City Excellent Invention Selection Competition. The results of this project have been promoted and applied in Shanghai Bada Textile Printing and Dyeing Garment Co., Ltd., Shanghai Longtou Home Textile Co., Ltd., Shanghai Automobile Carpet Factory Co., Ltd., Shanghai Jiesen Environmental Protection Technology Co., Ltd., Jiangyin Asus Textile Co., Ltd. and other enterprises. High-performance nano-photocatalyst composite multifunctional series of clothing fabrics, knitted underwear, curtains, household bedding, car carpets, car floor mats, etc. have been developed, completing the design of industrial production processes. It can form a certain scale of production capacity on conventional process equipment, and its products are exported to France, Brazil, etc. In the past three years, the project has added 375.436 million yuan in output value, 57.814 million yuan in profit, 25.003 million yuan in tax revenue, and generated US$9.972 million in foreign exchange. The product quality meets user requirements, and customer feedback information is good. It has expanded the application field of textiles, increased the added value of products, enhanced competitiveness in the international market, achieved considerable economic and social benefits, and promoted the upgrading of technologies and products in the multifunctional textile industry.