Development Of SALS Small Angle Laser Scattering Measuring Instrument For Chemical Fiber Measurement

For many years, China chemical fiber Measuring means and techniques are relatively backward. "If we want to do well in our work, we must first use our tools". To make our chemical fiber varieties and functions surpass the world level, we must have advanced measuring instruments. Small angle laser scattering (SALS) is an important analytical technique for measuring the deformation of spherulites and deformed spherulites of various fibers and films. However, although the theory of small angle laser scattering has been established for more than 60 years, there has been no breakthrough because of the relevant technical bottlenecks, thus restricting the development and application of the instrument.

In order to further promote the technological innovation mechanism based on market orientation and combination of production, study and research, Kelly new Mstar Technology Ltd in Shanghai, together with the materials Institute of Donghua University and Shanghai Qingpu instrument factory, have formed a joint research team of industry, academia, research and application. Following the development of International material testing technology and adopting high and new technology, after several years of research, an intelligent SALA- III small angle laser scattering instrument has been developed to fill the domestic blank of the product.

The division of labor is clear and the three parties perform their duties.

In the research team of three parties, the Kelly new Mstar Technology Ltd in Donghua, Shanghai, is mainly responsible for the practical experience and scientific process of the development of the small angle laser scattering meter with the advantage of the development, development, upgrading and application of polymer materials and new measuring instruments for textile and chemical fibers. Donghua University relies on its strong scientific research strength to provide technical support for the project. Shanghai Qingpu instrument factory has various types of lathe, milling machine, planer, grinder, boring machine, punching machine, edge cutting machine and heat treatment equipment. It is responsible for the processing and mass production of the intelligent SALS small angle laser scattering measuring instrument.

The project team adopts the responsibility system of the project leader, and establishes the sub topics to determine the responsibilities of the partners, so that the responsibilities and responsibilities are clear and the tasks are clear. According to Yang Dinghai, the leader of the project, the product development takes full advantage of the existing integration of production, teaching and research, and applies the technology developed to scale production quickly, shortening the process and time for the completion of technology and product development. The production process mainly uses the existing production conditions of the project units, while the more professional processing is entrusted to the professional manufacturers to produce according to the technical requirements, so that both the normal input and cost of the project can be guaranteed, and the linkage development of other related industries can be promoted. By summing up the experience of the project regularly, we will convene a meeting of experts, scholars and engineers to discuss the difficulties and key points in the progress of the project. The research results will be transformed in a timely manner through the production and research platform, providing a good atmosphere and necessary measures for the transformation of technological achievements.

　　 Five innovations to achieve precise measurement

　　 Yang Dinghai It is said that the intelligent SALS small angle laser scattering meter is the first time to apply modern computer technology to the measurement of polymer spherulite structure. It is used to measure and study the crystallization imaging process, crystal morphology and spherulite size of polymer. It also studies the tiny change of spherulite structure of new materials such as fiber and thin film during the drawing process under different isothermal conditions. It provides convenient and effective measuring instruments and methods for the control of polymer processing technology and the study of spherulite structure.

It is understood that the key technologies and technical indicators of intelligent SALS small angle laser scattering measuring instrument have five innovations: high resolution professional high, medium and slow dynamic camera system. A self made high-resolution camera system based on MVC-11-3M is designed, which is composed of high-speed, medium speed, slow and full view camera, including automatic scanning, manual scanning, ranging and automatic lifting and adjusting mechanism; full spectrum laser measuring device and high stability laser power supply. A full spectrum laser generator with different wavelengths (including 6328A wavelength), a dedicated 100W~1000W power adjustable laser power supply, a full spectrum laser measuring device and a high stability laser power supply; a polymer spherulite structure dynamic stretching transmission system, stepless speed regulation, full spacing: 200mm, minimum spacing: 0.01mm; high temperature melting hot stage and crystallization hot table device. Temperature range: control temperature accuracy + 0.1 C, digital setting and digital display. At constant speed and temperature programmed, the heating curve can be set arbitrarily at 11 gear rates, 0.1 /min, 1 C /min, 2 C /min, 10 C /min, and the resolution is + 0.1 C.

What is worth mentioning is the advanced professional application software developed by the team. The image and related professional Atlas of the whole process of spherulite growth include scattering light intensity distribution, columnar map, polygon line atlas analysis and data automatic storage and printing. By using the powerful and practical processing functions of professional software, high precision video capture function, high efficiency video editing function, powerful image editing function and intelligent data processing function, the functions of convenient switch function, spectral curve zoom and leveling among different atlas can be realized, printing and preview and print functions can be printed according to the display ratio, experimental data preservation function, historical experiment data calling function and experimental data import and export and correction functions.

Widely used, praised by users.

In the process of measuring all kinds of fiber and film morphology, static observation has been done in the past. Intelligent SALS small angle laser scattering meter can not only observe the static state, but also observe and measure dynamically continuously. This technology is the first in the world. It has a great influence on the research and improvement of the structure and properties of fiber polymer.

According to Yang Dinghai, the intelligent SALS small angle laser scattering meter project has been verified by the Shanghai science and Technology Novelty Search Consulting Center of the Chinese Academy of Sciences. The intelligent small angle laser scattering meter has not been reported at home and abroad. It has been identified as filling the domestic gap and has novelty and good market application value.

At present, the instrument has been widely applied in nearly 211 hundred key institutions of higher learning, research institutes and related enterprises in the whole country, and has been well received by teachers, students and users. There is an urgent need for intelligent SALS small angle laser scattering measurement instrument in the national macromolecule specialty, including state-level laboratories and new materials manufacturing enterprises. At present, the intelligent SALS small angle laser scatterer is the only product in the domestic market, so it has good performance. Industrialization Prospects.