Protein fiber has "air conditioning function"

Summary:

Business Club on January 25th came to Beijing Xuelian Cashmere Co., Ltd., located in the factory area of ​​Daxing, Beijing. The reporter found the company’s senior engineer, Miao Xiaoguang, who won the second prize for the National Technological Invention Award in a humble office.

Although Miao Xiaoguang’s thinking is agile and as young as young people, he is constantly making all kinds of babes like juggling in the process of telling. These babes include milk silk, cashmere, paraffin and their The finished product of the research results - sweater made of milk protein thermoregulation fiber and cashmere blended.

The National Science and Technology Awards Conference was held in Beijing on January 14. In 2010, six projects in the textile industry won national awards. Of these, two projects won the second prize for the National Technological Invention Award and four won the second prize for the National Science and Technology Progress Award. Awards. "High-temperature phase change material microcapsules completed by Zhang Xingxiang, Tang Guojun, Tian Sufeng, Miao Xiaoguang, Wang Xuechen, and Shi Haifeng from Tianjin University of Technology, Tsinghua University, Shandong Hailong Co., Ltd., Beijing Xuelian Cashmere Co., Ltd. and other units." , high heat storage and temperature control fiber and its preparation technology "project won the second prize of the National Technology Invention Award.

Miao Xiaoguang's main contribution to the research and development of the "High-Temperature Phase Change Material Microcapsules, High Storage Heat Storage Temperature Control Fibers and Preparation Technology" project is the research and development of protein thermoregulation fibers and their preparation techniques.

This fiber fabric can absorb, store, redistribute, and release heat. When the ambient temperature is low, it automatically raises the temperature inside the clothing. When the ambient temperature is high, it automatically lowers the temperature inside the clothing to make the temperature inside the clothing more comfortable. .

Machine edge allows cashmere products with thermostat function

"Cashmere and wool meet with water and it's feverish. This is common sense. However, this moisture absorption and heat release is one-off and cannot be repeated. Therefore, cashmere and wool have good insulation function, but they do not have the function of regulating temperature." Miao Xiao Light said.

At this point, the development of foreign thermostat materials has also entered a mature stage.

Outlast was a patented technology developed by the National Aeronautics and Space Administration research project in the late 1970s and early 1980s. It was developed by the NASA for the moon landing program to create moon landing gear for astronauts, including gloves. Socks, underwear, etc. Later, they established the Gateway Research and Development Company specializing in the research and development of tempering fibers with a registered trademark of outlast. The thermoregulation fibers are used in the production of ordinary clothing and are sold in the US and European markets. Outlast air conditioning fiber is a A new type of smart fiber was developed in 1988. It was first used for commercial purposes in 1994. It was used in outdoor clothing in 1997 and is now widely used in fashion and bedding. When products use this technology, they should be put An Outlast tag. This tag shows the effect that can be achieved using this technique: "Not too hot, not too cold".

Comfortemp is a temperature-adjustable, high-tech material developed by Frisby, North Carolina, using a Phase Change Material (PCM), originally used by NASA for aerospace applications. An insulation material used to protect the temperature of astronauts and space equipment. The main purpose of this product is as a clothing material additive, which can be used to make constant temperature fabrics, which can automatically adjust the body products within the proper temperature range. The ambient temperature achieves the double effect of resisting the "high heat of the heat" and "cold cold", and at the same time has good air permeability.

Swiss schoeller company has introduced innovative flexible fabrics with flexible temperature adjustment. The key to its innovation is c-change biomimetic temperature film with "morphological memory function". It can adjust moisture permeability flexibly and can be fine-tuned according to weather changes. The temperature of the garment quickly drains moisture and is highly waterproof and windproof.

Daiwa Chemical Industries of Japan introduced the newly developed microcapsule temperature control agent products Prethermo C-25 and Prethermo C-31 (Prethermo C Series) to the textile auxiliaries market. The Prethermo C Series can be used for the finishing of textile fabrics other than silk. , Particularly suitable for underwear, bedding and overalls processing use. Generally used in the finishing process using padding method.

In the wool industry, Miao Xiaoguang, who has been rolling all his life, once envisaged the function of adjusting the temperature of cashmere fibers. Interestingly, at the 1998 Sangma Awards, Miao Xiaoguang saw the realization of this idea. hope.

In the same year, Zhang Xingxiang from Tianjin University took a "tempered capsule" and won the Sangma Award. The "tempered capsule" at that time was mainly used to make flake fillers. This filler can be used to produce high-grade outdoor products. According to Xiaoguang, since this thermostatic capsule can produce a flake filler, can further study make it spinnable and comfortable?

Many methods used in the process

Temperature comfort is the first requirement for the fiber. Because the natural fiber itself does not have the function of regulating temperature, Miao Xiaoguang thought of adding certain substances to cashmere so that it can also regulate body temperature. "Preserve the characteristics of cashmere itself. The idea that Miao Xiaoguang always insists on studying thermoregulation fiber has caused him to suffer a lot.

The earliest method was coating. Since Zhang Xingxiang's "tempered capsule" research has been used as the basis, Miao and his team thought of breaking the capsule or directly coating the phase change material onto the cashmere sweater. As a result of this, the thermostat function is realized, but the texture of the cashmere itself does not exist. The product feels stiff and does not feel comfortable.

In this process, Miao Xiaoguang had also thought of buying foreign thermostat fibers such as the United States' Outlast. He found through comprehensive experiments that the use of these fibers and blended cashmere would not achieve the effect of temperature adjustment if the content were small. The content is too much to keep the feel of cashmere.

As a result, Miao Xiaoguang and his R&D team began to look for new ideas. They thought that if the thermostatic capsules are made of fiber and blended or interwoven with cashmere, the problem of changing the feel of cashmere products can be avoided. The method can be achieved by adding a phase change material to the synthetic fiber spinning solution. However, from the consumer's point of view, considering the problem, a large amount of chemical fiber is added to the manufactured cashmere product, which is very unfavorable for the value of the cashmere transfer. .

Eventually, they thought of adding phase change materials to milk protein spinners to make milk protein thermoregulation fibers, and then blending them with cashmere to make cashmere sweaters.

"The cooperation in R&D is very important. The cooperation between Beijing Xuelian Cashmere Co., Ltd. and Tianjin University, Tsinghua University, Shandong Hailong Co., Ltd. and other units is a typical cooperation between industry, university and research institute, which is beneficial to the results." Miao Xiaoguang said, " In fact, there are some cooperations that are not listed in the project, but without them, this invention cannot be completed at all."

According to some relevant provisions of the National Science and Technology Progress Invention Award, not all participating personnel and participating units can be included. Therefore, some people and units become heroes behind the scenes.

Miao Xiaoguang’s list of behind-the-scenes heroes that are not listed in the project are many units including Shanxi Hengtian New Fiber Technology Development Co., Ltd. Miao Xiaoguang took out a dozen milk protein thermoregulation fiber samples. It is said that the experimental production of such The sample took a long time for researchers from Shanxi Hengtian. "It is unknown whether the melt temperature or the thermostat capsule dissolves properly, and the microcapsules will easily reunite after being dissolved, blocking the nozzle of the spinner. Their experiments Staff had to clean the nozzle again and again."

Miao Xiaoguang and his experimental team paid a lot during the experiment. For some time, Miao Xiaoguang's face was swollen and peeled after swelling. When describing this matter to reporters, Miao Xiaoguang was an understatement. At that time, I was looking for a suitable substance to react with protein. At the same time when it reacts with protein, the outflowing gas must have reacted with the body's surface protein, so my face is swollen. But this is not. Dangerous, peeled off the skin just fine, there is no sequelae." Miao Xiaoguang said.

Prospect extends to the field of protein synthesis

The wide application of thermostat fiber in the world has already proved its development has broad prospects for development. It can be used for the production of personal underwear, safety protective clothing, shoes, bedding, including astronaut clothing.

Although the initial purpose was to allow the cashmere products to have a thermoregulation function, Miao Xiaoguang’s researched milk protein fiber can be blended with many fibers, including blending with wool, camel hair, cotton and other fibers at a ratio of 40%. Good temperature control fabric.

This fabric phase change ç„“ up to 22J / g or more, and excellent pressure, high temperature performance. Even after the product by high temperature dyeing and steaming, high-pressure stereotypes finishing and soaping process, the phase change ç„“ is still more than 20J / g. This fiber is a nutritive material containing natural milk protein. It has excellent skin-friendly properties and provides sufficient conditions for downstream customers to develop and develop high-grade new functional fabrics. Although "reserving the characteristics of cashmere itself, the high value of delivering cashmere" is The starting point was studied, but the research fiber covered the entire protein fiber field. The raw material used to prepare the temperature control fiber can be extended to other protein fiber synthetic fibers.

In the field of protein synthetic fibers, this technology can be used to produce high-caloric-conservation temperature comfort smart temperature-control fibers modified by proteins such as cow's cheese protein, wool protein, wheat protein, or corn protein, and its phase in a suitable temperature range for human body Change can reach more than 20J/g.

In the large project of "high temperature-resistant phase change material microcapsules, high heat storage and temperature-regulating fiber, and preparation technology", each unit has its own research focus. For example, the focus of Tianjin University's research is on thermoregulation capsules. The focus of the university's research is on intelligent temperature-regulating silicones. Shandong Hailong's research focus is on viscose thermostat fiber.

Different from other winners, the carrier of smart fiber of Beijing Saussurei Co., Ltd. is protein fiber. Miao Xiaoguang and his team have succeeded in providing the temperature control function of milk protein fiber. In the concept of people, and silicone temperature control fiber Compared with viscose fiber, thermoregulation of milk protein fiber clearly has more selling points.

"There is hope for cooperation with COFCO in the production of protein, milk protein, corn protein, and other high-calorie temperature comfort thermostat fiber," said Miao Xiaoguang.

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