Synchrotron Radiation Technology For Structural Evolution Of Polysulfonamide Forming Process

In view of the problem of insufficient mechanical properties of polysulfonamide (PSA) fibers developed by our country, Zhang Yumei is one of the main participants in the project. She and his team members used synchrotron radiation technology to establish a multilevel and multi-scale quantitative analysis method for analyzing the fiber from molecular structure to microstructure. Based on the analysis results of non-equilibrium structure in fiber forming process, the structural factors restricting the mechanical properties of fibers were excavated, and the relationship between fiber structure properties and process was established, which is the basis of new process design and effectively improves the mechanical properties of fibers.

1. the interaction between molecules is illustrated by means of synchrotron radiation X- ray diffraction and molecular simulation. It provides a basis for the quantitative calculation of supramolecular structure of polysulfonamide fibers.

2. the synchrotron radiation technology was used to study the evolution of morphology and structure during the spinning process of PSA, indicating the technological conditions of the pition point of PSA crystal structure and the lamellar structure formed along the spinning process, which effectively improved the mechanical properties of the fibers.

3. an on-line detection method for the microstructure of polysulfonamide fiber during the forming process was established.

Project achievement in Shanghai

The 1000 ton production line of the company has been applied to produce and produce 15 tons of 1.5D and other standard fibers. From the application effect, the tensile strength of the fiber has been greatly improved and the fiber strength of the test batches has reached 3.5~3.7cN/dtex.

Optimized.

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Textile industry is one of the main pillar industries in Africa, attracting more and more money from Asia in recent years, which brings opportunities and challenges to the textile industry itself. Meanwhile, local garment manufacturers are also greatly impacted by Asian imports.

The current situation of Africa's cotton textile apparel industry chain is affected by the differentiated assistance and support that China has implemented in Africa in recent years.

The main participants in the world textile market and important customers in the cotton market are mainly from Asia, of which China accounts for a relatively large proportion.

Southeast Africa's cotton exports to Asian countries are increasing, while the southeastern region has the most dynamic textile industry in Africa and is an important cotton producing area.

Meanwhile, African local garment manufacturers are overwhelmed by imports from Asia.

Asian investors have brought advanced technology and management methods to the southeastern African countries, helping to improve local production processes. Now the pilot projects try to shift the large-scale garment production process from Asia to southeast Africa, but the sustainability of this effort is not yet clear.

Moreover, the modernization of Africa has just begun to enter a new stage, and the success of African modernization, and China's investment in Africa is extremely important, because it can be used to promote innovation in Africa and to stimulate Africa's economic potential.