As early as 2006, many Japanese companies began to experiment with air purification textiles. The polyester fabrics produced by some companies can purify formaldehyde, ammonia, acetic acid and other substances, and some acrylic fibers can eliminate ammonia through chemical absorption. Another type of polyester has a strong removal effect on acetaldehyde, which is the main component of tobacco.
The scientific research team led by Shen Yong (Professor of the School of Fashion, Shanghai University of Engineering and Technology) developed a nanocatalytic material this time that can degrade formaldehyde, benzene and other harmful organic matter in the air under the action of light. These organic matter will be decomposed into water and carbon dioxide to purify the air. After identification, this scientific research achievement integrates self-cleaning, air purifying, antibacterial, deodorizing, anti-ultraviolet and other functions.
Talking about the initial establishment of the project, Professor Shen Yong told reporters: “Nowadays, there are many news reports that children got leukemia after riding in a new car they just bought, or shortly after moving into a new house, although it is not medically certain that harmful substances such as formaldehyde are the main cause of the disease. , but we still hope to find a material that can purify the air and avoid the harm of air pollution to the human body. ”
In his continuous research, he found that nanometer photocatalytic materials and textile fibers can be used as an efficient and durable photocatalyst and other multi-functional textiles to degrade or decompose volatile organic compounds in the environment, and can be used in daily life and certain activities. On some special occasions, it can achieve the effect of “purifying the air”.
What’s even more surprising is that this product not only purifies the air, but also has multiple functions such as UV protection, antibacterial and deodorization. In comparison, Japanese air purification textiles appear to have a single function and are inconvenient to use.
However, combining nanophotocatalytic materials with textile fibers requires a lot of research work, and many research teams have made related attempts before.
Some teams have adopted a solution blending or melt blending method to mix nanomaterials with fiber polymers to produce functional fibers and fabrics. This solves the problem of nanomolecules needing to be firmly combined with fibers, but a new problem arises. Lai: The nanomaterials made in this way are easily agglomerated and may be accompanied by impurities, making them difficult to control.
Another method is to “stick” nanomaterials to the surface of textiles through adhesives. Such textiles are difficult to clean and the fabric feels rough.
After nearly ten years of research, Shen Yong finally found a solution: using chemical methods of structural modification, the reactive chemical groups on the nanomaterials can directly react with the fibers to achieve tight covalent bonds. This chemical combination Not only does it ensure the feel of the fabric, it does not contain any added adhesive, it also takes advantage of the characteristics of the fabric’s raw materials and is green and environmentally friendly.
He said that the key to this project is to achieve breakthroughs in related technologies in the process of uniform dispersion of nanoparticles and their firm combination with fibers, and the completion of a number of technological innovations.
Through this project, his team developed the “one-step” hydrolysis preparation application technology and production technology of modified nano-titanium dioxide in functional finishing of textiles, developed a feasible finishing process of modified nano-titanium dioxide in textiles, and solved the problem of nanoparticles. In order to solve the problem of uniform dispersion on the fiber and its strong combination with the fiber, we developed a series of fabric photocatalysts, antibacterial, and anti-UV multifunctional finishing agents, and established the production of nanometer multifunctional textile clothing fabrics, home textiles, and automotive interior textiles. base.
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