New chemical materials in the boat of life

"Shenzhou", the glorious name that carries the Chinese nation's thousand-year dream of flying to the sky, has spread all over the world
.

Recently, the Shenzhou 12 manned spacecraft once again took on the heavy responsibility.

Thermal control material: put on new clothes for Shenzhou spacecraft

Thermal control material: new clothes for the Shenzhou spacecraft Thermal control material: new clothes for the Shenzhou spacecraft

This time, the Shenzhou 12 manned spacecraft is more beautiful than the "predecessors" dressed in gray coats
.

This coat is a new type of low-absorption, low-emission thermal control coating carefully developed by the 529 Factory of the Fifth Academy of Aerospace Science and Technology Group for two years

This time the spacecraft will stay in space longer than before, and the space environment it faces is even worse
.

Because the surface temperature of the spacecraft facing the sun will be as high as 90℃, the surface temperature of the cabin facing the sun will be as low as -30℃

This low-absorption, low-emission thermal control coating coat is a thermal control material sprayed on the outer surface of the spacecraft
.

It has the ability of low absorption and strong reflection of solar radiation, which can reduce the internal heating phenomenon caused by long-term solar radiation of the spacecraft.

High-strength carbon fiber: to ensure smooth operation of Shenzhou

High-strength carbon fiber: to ensure the smooth operation of Shenzhou High-strength carbon fiber: to ensure the smooth operation of Shenzhou

Various high-end materials and intelligent technologies are also applied in the spacecraft to ensure the normal work and life safety of the astronauts and the smooth operation of the spacecraft
.

As an emerging material, carbon fiber is lighter than aluminum, but it has stronger strength than steel.
It also has excellent characteristics such as high temperature resistance, corrosion resistance, impact resistance, and fatigue resistance.
It is widely used in aerospace manufacturing.
Field
.

During the launch and return of the Shenzhou spacecraft, the designers designed a high-strength carbon fiber control stick for the astronauts.

　　In addition, in terms of technical performance, the intelligence level of the spacecraft is constantly improving, and the spacecraft control computer autonomously calculates and executes orbit control internally
.

In terms of chips, the spacecraft has made a number of domestic chip application improvements, which have high-precision, low-aging, anti-vibration and temperature-compensated crystal oscillator performance, which is better than imported ones

　　High-performance fibers: let astronauts walk in space

　High performance fiber: Let astronauts walk in space　High performance fiber: Let astronauts walk in space

　　This time, the astronauts will wear domestically-made outer suits to carry out out-vehicle activities and out-of-vehicle operations
.

Compared with the previous outerwear, the new generation of outerwear not only adds many new elements to the design, but also optimizes more functions

　　"The space environment is very complex.
The characteristics of strong cosmic ray radiation, extreme temperature difference, microgravity, and high vacuum will have a direct impact on astronauts, and even threaten their lives
.

Without the protection of overvehicle suits, exit operations cannot be achieved.

　　It is understood that the new generation of cabin suits has a total of 6 layers
.
Comfortable layer woven by cotton cloth with special anti-static treatment, backup airtight layer of rubber texture, main airtight layer composed of composite joint structure, limiting layer of polyester fabric, heat insulation layer to achieve heat insulation through heat reflection, And the outermost protective layer
.
The protective material of the outer layer can withstand temperature changes above ±100°C
.
It can work continuously for 6 hours, up to 8 hours, to maximize the safety of the astronauts when they exit the capsule, and carry out a series of complex operations of the space station and related load tests
.

　　As for astronauts’ in-cabin shoes, Zheng Rong, head of the Donghua University’s astronaut’s in-cabin shoes R&D and design team and professor at the International Fashion Science and Innovation Center of Donghua University, introduced that the materials for the in-cabin shoes are thermoplastic materials and blends.
Knitted materials are mainly used to ensure the comfort and safety of the feet of the astronauts during activities in the spacecraft cabin and the space station under the weightless environment
.
At the same time, considering the microgravity state in the cabin and the weight requirements of the spacecraft, the shoes used in the cabin are much lighter than ordinary shoes worn by ordinary people
.

　　Polycarbonate copolymer: a clear exploration of the mysterious universe

　Polycarbonate copolymer: a clear exploration of the mysterious universe　Polycarbonate copolymer: a clear exploration of the mysterious universe

　　The helmet surface window of the extravehicular suit can be described as the "eyes" of the astronauts, not only to provide the astronauts with a clear and good vision, but also one of the most critical parts of the astronauts' life support
.

　　Professor Liu Chuntai, executive director and professor of the National Engineering Research Center for Rubber and Plastic Moulds of Zhengzhou University, introduced: “As the weakest link in the space suit, in the face of huge air pressure, any cracks on the face window may endanger the lives of astronauts
.
” According to understanding, The material used for the helmet surface window of the outerwear is composed of polycarbonate or a copolymerized mixture of polycarbonate
.
In order to improve the anti-aging performance of the aerospace window, the project team studied the thermal stability of polycarbonate, so that the helmet window has the characteristics of high impact resistance, high spectral transmittance, etc.
, and can say "no" to the temperature difference of 300℃.
The performance indicators of window products fully meet the requirements of aerospace
.