China Apparel Fabric Industry: The pursuit of functional and comfort propositions
Supported by the National Natural Science Foundation of China, the team led by Tang Fangqiong, a researcher with controllable preparation and application of nanomaterials at the Institute of Physics and Chemistry, Chinese Academy of Sciences and the team led by Li Yi, a professor of textile and apparel at Hong Kong Polytechnic University, discovered that A unique nano-finishing technology, the successful development of a wash-resistant "quick-drying" type wool fabric. The research has been published in the journal Chemistry & Sustainability, Energy & Materials (ChemSusChem), a sister publication of Applied Chemistry in the German Chemical Society. And apply for international invention patents. Iron eggs from the city back to the village, said the city has a machine, go from here, the pig into a ham sausage, from the other end, sausage into a pig. This is a comic strip "Elevator in front of" a bridge. The same incredible machine there is a machine: the whole piece of wool from the machine "go" again, the wool will be in the machine "nano-modified", which has quick-drying moisture, easy perspiration, and many other superior performance . The former is only a comic baggage, while the latter is working hard with scientists, one step closer to reality. Technical Challenges for Textile Powers Although China is a big textile powerhouse, the domestic textile industry needs to continue its efforts in the design and processing of new fabrics. Taking sportswear as an example, information from China Apparel Network shows that the sportswear market in China has witnessed the fastest growth. In recent years, sales of sportswear brands in shopping malls have been the best. Ordinary sports market in the market every year can easily get tens of millions of sales. But we are familiar with the big brands still rely on imported fabrics to attract customers. There is a microclimate environment between the human skin and clothes. How to reduce the moisture content of the microclimate environment as much as possible for sportswear, so that the sweat on the human body surface can rapidly diffuse through clothing and evaporate into the air instead of Staying on the skin and keeping the garment dry and comfortable make it always the goal of people to work hard. Currently on the market sports brand to use more water-repellent chemical fiber, especially polyester, polypropylene, etc., the reason why such chemical fiber fabrics can absorb moisture perspiration, mainly because it absorbs sweat, sweat diffusion speed, and in the fabric The other side can quickly evaporate. In natural fibers, cotton, wool skin feel comfortable, green and healthy. Especially wool fiber, because of its light weight, soft, warm and other excellent quality has become an ideal garment material. Moisture absorption performance of cotton fiber is very good, but its moisture release speed is very slow, the diffusion rate of sweat is also slow, making sweat easy to concentrate. Once a large number of people sweat, sweat cotton fiber sweat after a serious, sticky in the body more uncomfortable. The structure of the scale layer on the surface of the wool fiber makes the natural hydrophobicity of the wool fabric, hindering the water absorption capacity of the wool fabric, resulting in a low moisture absorption and perspiration rate, which makes it extremely irritating and uncomfortable after a large amount of exercise. "Therefore, the development of 'quick-drying moisture' wool fabric has been a hot research topic in this field." Institute of Physics and Chemistry Chinese Academy of Sciences nanomaterials preparation and application of controlled materials researcher Tang Fangqiong said. Functional and comfort claims "There is bound to be more and more demand for clothing functionality and comfort, and comfort will gradually become one of the first things people consider when buying clothes," Tang said. With the improvement of living standards, a series of new fabrics came into being. The success of DuPont's highly elastic Lycra fiber, waterproof breathable fabric EXOTHERM functional fabric demonstrates the power of functional fabrics in increasing product value and meeting consumer needs. The rise of nanotechnology has also had a profound impact on the revolution in the field of textiles. In recent years, antibacterial, deodorant, anti-UV, self-cleaning and other functional nano-textile fabric has aroused widespread concern. In addition to the novelty of functionality, the use of nanotechnology, the development of "quick-drying moisture-absorbing" type of fabric to improve the wearing comfort of the fabric is also of great significance. Last year, Tang Fangqiong team and the team led by Professor Li Yi from Department of Textile and Apparel, Hong Kong Polytechnic University, developed a unique nano-finishing technology and successfully developed a "moisture-fast-drying" wool fabric with washability. The team had coated the surface of the wool fiber with a nano-thin layer composed of spherical silica to construct a super-hydrophilic wool fabric, and discussed the mechanism of nano-technology modified wool fiber hydrophilicity and hydrophobicity. However, nano-functional fabrics in practical applications also face a major problem that the new features of nano-technology fabric can not be sustained, such as washing resistance is not enough, after washing, especially in people's daily life washing machine washing method, which Some or all of the special features will disappear. Wool on the "long" a new feature "Before the nano-functional fabric preparation method is to make nano-materials additives, and then coated on the fabric, nano-particles by electrostatic adsorption on the fabric, this way is not solid. Some features can not be kept alive and washed out after a few washings, "said Tang Fangqiong." We started out as trying to solve the problem of durability and firmness. "Based on the previous research, Oriented, the use of surface grafting and in situ growth strategy, the wool fiber surface amino, carboxyl and other groups made monomolecular modification, these chemically modified groups and nano-silica particles can be firmly bonded to Together, in-situ growth of a thin layer of nanosilica with a diameter of 20 nanometers on the surface of the wool fiber. The group members went to the China Textile Research Institute, the "in-situ growth" of silicon dioxide thin layer of wool fabrics were tested. In reference to national standards after the test proved that it meets the "moisture quick-drying" functional fabric of the various indicators, with a sense of skin comfort, rapid perspiration function. Fabric treated in this way, the washing machine after 20 times, the "moisture fast drying" characteristics can still be well maintained, to solve the current nano-functional fabrics is not enough washing durability problems. Because the "grown" nanolayer is thin, the weight of the treated fabric increases less than one in a thousand. "Therefore, the additional cost is small, and the in-situ growth strategy greatly simplifies the preparation steps and provides new ideas for building nano functional fabrics on a large scale," said Tang Fangqiong. "We mainly research nanomaterials and always wanted to get out of the lab and put the nanotechnology into practical use. In our cooperation with the Hong Kong Polytechnic University, our initial idea was to invent a machine for making nanomaterials, "Once again, nanomaterials can grow directly on the fabric." Tang Fangqiong said, "At present, we are working with a textile enterprise in Jiangsu Province to prepare the wool for processing before it is woven into fabric, thereby improving the quality of the wool fiber. According to reports, to the fabric dyeing commonly used wet dyeing method, the fabric should be soaked in pigment, and then heated to 90 degrees Celsius, after 30 minutes out to dry, wash off the floating color, and then drying, the entire process It takes more than 1 hour. The surface grafting and in-situ growth of the preparation of nano-layer also has a process, but also through soaking, drying, and then grow in nano-solution particles, and then dried. From the beginning to "long" nanometer layer, about two or three hours. This process can be combined with the textile dyeing and finishing process, at the same time. "The 'long' nanofilm on the fabric has the function of 'quick-drying moisture' and the fabric is easy to perspire. We used titanium dioxide and silica to create functional fabrics with self-cleaning and antibacterial properties In theory, if you let it 'long' on the flame retardant, waterproof, cold, anti-infrared infrared and other functions of the nano-layer, the fabric has a corresponding function. "Tang Fangqiong said.
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