New breakthrough in research on fully biodegradable polyester materials

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Reposted from: After nearly three years of unremitting efforts, the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, China Polymer Network, has made an important breakthrough in the research on the radiation performance of fully biodegradable polyester materials. Recently, the project passed the expert acceptance organized by Changchun Science and Technology Bureau. The expert group believes that the research results achieved by this project provide new methods and approaches for the high performance and industrialization of aliphatic polyester, and have broad application prospects. 　　Aliphatic polyester is a completely biodegradable plastic and is one of the main materials used in the production of disposable daily consumer goods and disposable medical supplies. With the improvement of people's living standards and the pursuit of health and environmentally friendly products, the market demand for aliphatic polyester is increasing year by year. However, due to the low thermal deformation temperature of aliphatic polyester, the use and transportation humidity of its products cannot be higher than 60 degrees. ； In the field of medical and health care, traditional disinfection methods cannot completely kill the germs inside the material and can easily cause secondary pollution. To this end, how to improve the heat resistance of aliphatic polyester and develop advanced disinfection methods so that the material can be used in a wider range of fields and better benefit the people has become an increasingly important issue. * * important needs. 　　In order to solve the above two major bottlenecks as soon as possible and effectively enhance the performance of aliphatic polyester, the Changchun Institute of Applied Chemistry of the Chinese Academy of Sciences, with the support of the Changchun Municipal Science and Technology Bureau, undertook the Changchun Revitalization Old Industrial Base Science and Technology Research and Municipal and Academy Cooperation Plan "Research on Radiation High Performance of Completely Biodegradable Polyester Materials" project at the end of 2005. In research and development, they took advantage of their technical advantages and accumulation in radiation processing and used vinyl multifunctional monomers to successfully transform polyester materials from radiation cracking polymers to cross-linked polymers. On this basis, plant fibers were used to enhance the high-temperature strength of polyester materials, and through research on fiber types, shapes, composite technologies, and optimization of radiation cross-linking formulas and processes, the synergistic effect of the above two methods in improving the heat resistance of polyester materials was fully utilized, and polyester materials were successfully prepared. A variety of composite materials, including ester/wood fiber, polyester/surface fiber, polyester/bagasse and polyester/glass fiber, have increased the heat-resistant temperature of the above materials from about 60°C to over 100°C for the first time, further meeting the needs of general plastic products and broadening their application scope. 　　At the same time, they made full use of the environmental protection, safety, thoroughness, and no secondary pollution characteristics of radiation disinfection technology. They systematically studied the radiation effects of polyester materials on the types, quantities, and distribution of germs on medical and sanitary products. By changing the process conditions, they developed a new process in which the total disinfection dose is less than 50kGy, the disinfection dose rate is greater than 106GY/second, and the products are protected with nitrogen or oxygen is isolated during disinfection. This effectively solves the problem of secondary pollution of medical polyester plastics and lays an important foundation for the industrial application of radiation disinfection of its products.