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The whole process of carbon fiber production is complicated, and the key includes dozens of processing stages such as raw material generation, chemical fiber forming, pre-air oxidation and carbonization, including various courses such as polymer chemistry, polymer physics, and material science research. The spiritual essence of meticulous work is indeed attributable to a super-difficult new project with the most technical content in the materials curriculum. It can only have the most sufficient support for the basic theories of basic disciplines, the guarantee of the best basic industrial production technology, and the most advanced technology. The three factors of meticulous practical operation and the most stringent management methods can be successful. However, the current status of my country's carbon fiber industrial production shows that these three factors are lacking. Among them, the weakest foundation is the scientific research of basic disciplines and basic theories.
In the past 30 years of scientific research, after many successful failures of Chinese scientific and technical personnel, in the analysis of many reasons that have pinned the development trend of carbon fiber, the long-term backwardness of the level of raw silk is the "short board" of the improvement of the level of carbon fiber. Finally reached a consensus. The importance of the original silk to the carbon silk also shows the regularity of "congenital underdevelopment, acquired difficulty to make up".
Because the injection of overseas second- and third-rate strands has a relatively high probability of development in recent years, it is found at this stage that apart from the diameter, compressive strength and crystals tend to be outward, the original strain rate, fracture extension, content and spread, thermal characteristics and elemental analysis Wait for the square but the foundation is close. The difference in the shape and structure of chemical fiber is more significant: the diameter is not as thin as that of the overseas original yarn and the error is large. It can also be clearly seen from the SEM photos that the domestic original yarn has many large defects and holes. The compressive strength data information is slightly lower, the uneven rate is too large, and the crystals tend to be smaller. Whether this difference is the important difference between the two kinds of raw silk quality is not certain, but the lack of important index values of high-quality raw silk is indeed the most serious one in the domestic raw silk production. One of the difficult problems.
The disadvantage is the most critical element that causes the material's compressive strength to decrease. Carbon fiber is also the most lethal element for typical ductile materials. However, the in-depth scientific research aimed at the causes of the shortcomings, especially the principle of how the shortcomings are caused and how they can be prevented, is rarely mastered. Therefore, the development trend of carbon fiber in my country has stalled for a period of time. The difference with overseas is getting bigger and bigger.
In the past 30 years of scientific research, after many successful failures of Chinese scientific and technical personnel, in the analysis of many reasons that have pinned the development trend of carbon fiber, the long-term backwardness of the level of raw silk is the "short board" of the improvement of the level of carbon fiber. Finally reached a consensus. The importance of the original silk to the carbon silk also shows the regularity of "congenital underdevelopment, acquired difficulty to make up".
Because the injection of overseas second- and third-rate strands has a relatively high probability of development in recent years, it is found at this stage that apart from the diameter, compressive strength and crystals tend to be outward, the original strain rate, fracture extension, content and spread, thermal characteristics and elemental analysis Wait for the square but the foundation is close. The difference in the shape and structure of chemical fiber is more significant: the diameter is not as thin as that of the overseas original yarn and the error is large. It can also be clearly seen from the SEM photos that the domestic original yarn has many large defects and holes. The compressive strength data information is slightly lower, the uneven rate is too large, and the crystals tend to be smaller. Whether this difference is the important difference between the two kinds of raw silk quality is not certain, but the lack of important index values of high-quality raw silk is indeed the most serious one in the domestic raw silk production. One of the difficult problems.
The disadvantage is the most critical element that causes the material's compressive strength to decrease. Carbon fiber is also the most lethal element for typical ductile materials. However, the in-depth scientific research aimed at the causes of the shortcomings, especially the principle of how the shortcomings are caused and how they can be prevented, is rarely mastered. Therefore, the development trend of carbon fiber in my country has stalled for a period of time. The difference with overseas is getting bigger and bigger.
