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The Secret Material Behind "Air Conditioning Clothes" Has Phase Change Function.

2014/2/23 8:39:00 72

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Air Conditioning Clothing Clothing Materials

it is reported that Chengdu's < a href= "http://www.91se91.com/" target= "_blank" > textile < /a > Zheng Guanghong, a senior college professor, led the Sichuan provincial university ecological textiles Key Laboratory, and developed a kind of "air conditioning a href=" http://www.91se91.com/ "target=" http://www.91se91.com/ "clothes < < >". The clothing can be adjusted and controlled by absorption and release of heat, and the maximum control range can reach 3 degrees ~5 degrees Celsius. 
 to further understand the mystery behind this "air-conditioned clothes", the reporter interviewed Professor Guang Guang Hong, a professor at Chengdu Textile College. 
 original intention: meeting special needs 
 reporter: what kind of idea or idea did you first develop this "air-conditioned clothing"? 
 Zheng Guanghong: this kind of "air conditioning clothes" is actually made of a href= "http://www.91se91.com/" target= "_blank" with the help of materials with phase change function. The clothing is "/a", which can be used to adjust the temperature of the human body surface by the "endothermic" or "exothermic" material produced by the phase spanformation process, which belongs to the special functional clothing. Due to frequent contact with the military industry system, our R & D team has some foundations for the development and application of special functional materials. In 1990s, Japan began developing materials that could automatically purify narrow space air with ultraviolet light energy, called "Photocatalyst". Our research team also began developing this material, and won a national patent in 2004. Using this material to make curtains and other interior decoration materials can effectively improve indoor air quality, especially the air environment quality of relatively narrow space. 
 simply speaking, the current "air conditioning clothes", which are mainly made of the "Outlast" brand fiber produced by the United States, are interwoven or blended with other fibers to enhance the comfort effect of the whole body so as to meet the special needs under special circumstances. Therefore, the production cost is high and can only meet the needs of the domestic high-end market. At present, we are making new improvements in temperature regulating materials, with a view to reducing costs, expanding the market and meeting the needs of ordinary consumers. As far as possible, we should locate the clothing with micro control of the body surface temperature to the ordinary consumers, but it will take some time. 
 principle: "state change" /p >
 reporter: can you give a brief introduction to the principle of adjusting the temperature of this garment? 
 Zheng Guanghong: simply put, ice dissolves into water and absorbs heat. When water is formed into ice, it will exotherm. The spanformation between these States is the "phase spanformation principle", and the "air-conditioned clothes" is made of microencapsulated raw materials with phase spanformation principle and then attached to fibers in different forms. Then the fibers containing microencapsulated phase change are interwoven or blended with ordinary fibers and processed into garments. When the surface temperature of the body rises or decreases, the phase change material contained in this garment can be adjusted by heat absorption or heat release, so as to adjust the skin surface temperature of the package. Of course, adjusting the temperature range is closely related to the proportion of phase change materials contained in clothing. The larger the proportion of phase change materials, the greater the temperature range will be controlled, but the higher the production cost. According to the special needs, the temperature range of the skin surface is about 3 C ~5 degrees. 
P > breakthrough: the emphasis on "raw material" /p >
 reporter: what is the process of R & D of air conditioning clothing? Can you give an example of how to overcome a technical difficulty in this process? 
 Zheng Guanghong: for this garment, we are based on the raw materials developed by the "Outlast" company of the United States, and are designed and made into garments through textile, printing and dyeing and processing, which belong to product development. If one day, the new temperature regulating material can be used instead of "Outlast" fiber, and the production cost of temperature regulating materials can be reduced to meet the market demand. In this regard, the development of "temperature adjusting fibers" with automatic adjustment of temperature or "phase change microcapsules" made of phase change materials as mentioned before should be a technical difficulty in developing "air-conditioned clothes". 
At present, there are many ways to make adjustable temperature garments in China. The main technical breakthrough is to adjust the spinning and forming technology of the temperature regulating fibers based on the adjustable temperature fiber materials. P Some are made of thermoregulation materials into microcapsules. When spinning, the capsules are embedded in the pores of their fibers; some are blended with other fibers, and some are processed in the form of printing and dyeing. Of course, each method has its advantages and disadvantages. 
 the "air-conditioned clothing" we made mainly chose the "temperature regulating fiber" developed by the "Outlast" company of the United States, and the microcapsule made of phase change material was added to the spinning fluid when spinning to become a "temperature regulating fiber" with temperature adjustment effect. The ability of clothing to adjust the temperature is related to the proportion of fabric containing "temperature regulating fiber" in the unit area. If we make a garment containing one hundred percent "temperature adjusting fiber" material, its ability to adjust the temperature may be high, otherwise it will be low. 
The price of this adjustable thermostat produced by P Outlast is very high. Considering the cost and the acceptable market price, we should pay attention to the proportion distribution when the temperature adjustable fiber blended with other fibers. In addition, the durability, air sensitivity and the strength, structure, color and comfort of the fabric should also be considered. Therefore, how to select and design the proportion of fiber interwoven or blending is a key factor for the development of this garment. 
 Future: more planning and expectation 
 reporter: what is the level of successful research and development of air conditioning clothing at home and abroad? What are the next steps in this area? 
 Zheng Guanghong: the development of phase change materials used in our clothing has taken at least 5 to 10 years in the United States. We started with material selection, and made it into garments on the basis of thermoregulation materials in the United States. 
 in fact, the technology of the United States and Japan is relatively advanced in this respect. I once worked as a researcher at Fukui University in Japan. In contrast, our country is still lagging behind in this aspect, especially in the development of functional fibers and functional materials. If the adjustment effect and the comfort evaluation of the "tempering fiber" are nearly blank, the inspection of this functional material needs to be tested in other countries. Secondly, the domestic concept of functional material application and industrialization is relatively slow, which is relatively backward compared with the United States and Japan. 
 there are still many defects in the specifications and types of tempering materials on the market, which can not fully meet the needs of clothing production. We should improve the insufficiency on the basis of absorbing the strengths of American raw materials, and strive to develop raw materials that can meet our clothing production in 3~5 years, and make creative things from raw materials. Our school is a school with a history of more than 70 years and mainly based on textile, dyeing and clothing. It can make use of its advantages in spinning, weaving, dyeing, clothing and other equipment and talents to develop functional materials and clothing. 
 of course, we also hope that the state will introduce relevant standards and assessment measures as soon as possible in the detection of such functional fibers.