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From a well-known energetic material scholar to the chairman of the Chinese Society of Flame Retardant, from specializing in the synthesis of energetic compounds to participating in the establishment of the National Professional Laboratory of Flame Retardant Materials in China and serving as the first and second director of the department, from serving as the head of the project group of the cross-industry comprehensive key pre-research project of energetic materials in the Ninth Five-Year Plan to the prestigious experts in the flame retardant industry at home and abroad; One burns, the other stops burning. Between the "one receives, one releases", Ou Yuxiang has been working steadily for decades, devoting herself in obscurity, not publicizing and not willing to show up, walking on his simple but remarkable life journey.

From Learning to Innovation

On October 30, 2006, at the first annual meeting of the Sino-US Joint Flame Retardant International Conference, Ou Yuxiang, as the Academic Committee and Organizing Committee of the Congress's President, warmly welcomed representatives of more than 100 institutions of higher learning, scientific research institutes and well-known enterprises from home and abroad to Beijing to attend the grand meeting of the world flame retardant industry, and pointed out the annual level of China's flame retardant and flame retardant material market in recent years. The average growth rate is as high as 15%, which is much higher than the world average annual growth rate of 3%~4%, and China is becoming the most vigorous and promising market after the United States, Western Europe and Japan. While paying great attention to China, the participants also focused their cooperation on the flame retardant material laboratory where Ou Yuxiang is located. It is recognized that Ou Yuxiang is one of the authoritative flame retardant experts in China.

As far as the flame retardant technology and the flame retardant material industry are concerned, as early as the 1940s, the United States has begun to take shape and established the American Flame Retardant Association in the early 1970s. In 1989, with the concern and support of the State Planning Commission and the World Bank, Ou Yuxiang, together with his colleagues, participated in the establishment of the National Professional Laboratory of Flame Retardant Materials in China, an academic institution specializing in flame retardant science and technology research and training advanced flame retardant technicians, which injected new vitality into the development of China's flame retardant and flame retardant materials industry, especially in training China. High-level flame retardant scientific and technological research personnel have created a new field.

At the beginning of the establishment of the laboratory, Ou Yuxiang and his colleagues visited American universities, research institutes and large-scale enterprises for many times, and attended many academic seminars on flame retardant in the United States and Western Europe. They learned from and learned advanced technology and experience from foreign countries, so as to broaden the research contents of the flame retardant Laboratory to include the synthesis and production process of flame retardants, the composition and processing technology of flame retardant materials, and flame retardant. Flame retardant theory and test methods of flame retardant performance are all kinds of flame retardant disciplines.

In order to catch up with advanced countries in the field of flame retardant, Ou Yuxiang devoted himself to scientific research and scientific discussion. He often stayed in the laboratory for several hours or even more, sacrificing a lot of time to enjoy his family. In the minds of colleagues and classmates, Ou Yuxiang has always lived a simple life and worked with high standards and strict requirements.

A hard work, a harvest, and Ouyuxiang's diligence and hard work have promoted the tracking research and development and independent innovation of flame retardant materials in China. After Yabao successfully developed a new flame retardant, decabromodiphenyl ethane, which can replace decabromodiphenyl ether, Ouyuxiang mastered the manufacturing process of diphenyl ethane, the raw material for the production of decabromodiphenyl ethane, and brominated diphenyl ethane to decabromodiphenyl ethane. The product was produced in Jiangsu Suli Fine Chemical Co., Ltd. in 2001. The plant has become one of the manufacturers of decabromodiphenyl ethane in China. The purity and yield of diphenyl ethane and decabromodiphenyl ethane produced by Suli Fine Chemical Co., Ltd. are high. The production process saves energy and reduces emissions, which keeps China decabromodiphenyl ethane at a lower price and can be generally accepted by users. In addition, three other environmentally friendly flame retardants developed by Ouyuxiang in recent years were identified as new technology products by Zhejiang Science and Technology Department at the end of 2006. Two of them have been put into production for several years and have achieved considerable economic and social benefits.

In terms of self-innovation, Ouyuxiang designed and synthesized a new phosphorus flame retardant Trimer, which has a cage-like symmetrical rigid structure, high thermal stability (initial decomposition temperature is 350 degrees Celsius), low water solubility, pure white color, phosphorus content more than 20%, high flame retardant efficiency. It is the best among all phosphorus flame retardants, suitable for flame retardant high-grade engineering plastics, and the price is moderate. It reflects the development trend of flame retardants in the future, such as environmental protection, high efficiency and low cost. Trimer samples have been requested by several large foreign companies for many times, and have now been provided to Swiss Ciba for applied research.

From Energetic to Flame Retardant

Ou Yuxiang is not only a well-known scholar in the field of flame retardant materials in China, but also has made great achievements in the field of energetic materials. Since entering the gate of Beijing Institute of Technology (now Beijing University of Technology) in 1954, Ou Yuxiang has formed an indissoluble bond with energetic materials, and specializes in the synthesis of energetic compounds. Over the past 50 years, more than 100 energetic compounds have been synthesized by Ouyuxiang. He participated in the development of a new process for the preparation of Oxotrope by sulphuric acid, which has reached the international advanced level through the identification of relevant departments. The synthesis and optimization of high energy density compound hexanitrohexaazoisowurtziane (C-12) is one of the important contributions of Ouyuxiang in the field of energetic materials. His research achievements on C-12 have published dozens of papers in leading domestic journals and authoritative international journals of energetic academia and international conferences. He has applied for five invention patents and four have been granted invention patents. These papers and patents cover the synthesis, reaction mechanism, reaction kinetics, preparation process and micro-molecular structure of C-12 and its high-energy derivatives. One of them is in the British Museum Library. The above papers have attracted the interest and attention of many researchers in the field of energetic materials at home and abroad. In view of his fruitful achievements, the National Defense Science and Technology Publishing Fund funded him to write a monograph on applied science, High Energy Density Compounds, which was published in 2005. Propulsion and Power and Heterocyclic Chemistry both published monographs written by him, introducing the progress of China and his own research achievements.

Both energetic materials and flame retardant materials, Ouyuxiang has made great achievements, and has published more than 20 books and more than 300 papers on the two materials. It participates in or is responsible for compiling energetic materials and flame retardant materials in many large encyclopedias and dictionaries in China. As the first prize winner or inventor, he has won one first prize for national defense science and technology progress and many other prizes, and seven national invention patents. In 2003 and 2005, he was recommended as an effective candidate for academician of Chinese Academy of Engineering. In 2001, it was included in the List of World Outstanding Scientists in the Twentieth Century by Cambridge International Biography Center.

Ou Yuxiang attaches great importance to the cultivation of talents while tackling key problems in scientific research. He respects students'interests and interests, encourages them to innovate independently and gives them full academic freedom. However, when reviewing students' papers, he is extremely strict and revises them repeatedly. Even punctuation marks require standardization. The papers written by Dr. Ou Yuxiang and Mr. Yan Shichu are often published in famous domestic academic journals such as Chinese Science, Organic Chemistry, Journal of Chemistry of Colleges and Universities, Science and Engineering of Polymer Materials and other authoritative foreign journals with innovative ideas. After nearly 20 years of unremitting efforts, the National Professional Laboratory of Flame Retardant Materials, which he and his colleagues co-founded, has become a comprehensive and high-level scientific research and personnel training base of flame retardant technology in China. Ou Yuxiang has trained more than 30 doctoral students. Some of them are working abroad, some are studying in Chinese Academy of Sciences, some are teachers in universities, some have become tutors, and most of them have become the backbone of scientific research and production in the field of flame retardant materials and energetic materials in China.

From Safety to Environmental Protection

Flame retardant research has been recognized as one of the important strategic measures to prevent and reduce fires, protect people's lives and property, and protect the environment. When Air France flies to Toronto for emergency landing, the use of flame retardant materials in the cabin did not trigger a fire, but also increased the intensity of research on flame retardant materials in some developed industrial countries. Since the establishment of the National Professional Laboratory of Flame Retardant Materials in China, Ou Yuxiang has actively promoted the development of China's flame retardant materials industry, and always set up the concept of fire safety and flame retardant must be environmentally friendly.

Since the establishment of the National Professional Laboratory of Flame Retardant Materials in China, the international community has paid full attention to the environmental protection of flame retardant. Ou Yuxiang has always expressed his deep approval and support for this, because environmental protection is not unfamiliar to him. When he was studying in the UK in his early years, every researcher had bottles containing waste liquor which were recycled every day by a specialist, and environmental workers often tested the water quality of rivers near the school. These details of environmental protection have left a deep impression on Eyuxiang. So since more than ten years ago, almost all of the materials he studied are environmentally friendly flame retardants. He has been actively promoting the halogenation and environmental protection of flame retardant materials in China, and has appealed for and committed to improving the product structure of flame retardant industry in China. He also actively participated in the discussion of the regulations on environmental protection and flame retardant of public places Products promulgated by the Ministry of Public Security, and assisted in compiling relevant textbooks. Whether it is a cooperative project with domestic or foreign enterprises, from the whole process of design-development-application-recycling, he adheres to the unswerving principle that flame retardant must be environmentally friendly.

Under the leadership of Beijing University of Chemical Technology, the National Laboratory of Flame Retardant Materials and many other units in China have participated in the declaration of the National Science and Technology Support Project "Substitution Technology of Materials Containing Toxic and Hazardous Elements", which has been approved by the State. Part of the content is to develop environmentally friendly flame retardants to replace some harmful traditional halogen flame retardants, which is also the goal of Ou Yuxiang. Now, Ou Yuxiang is also working with other colleagues in the laboratory to apply for 863 project "Reactive Silicon Phosphorus Flame Retardant and High Temperature Resistant Engineering Plastics and Processing Technology". This project mainly studies environmental friendly flame retardant engineering plastics with temperature resistance of more than 300 degrees Celsius. At present, most of these high-grade flame retardant materials are imported from China.

Ouyuxiang has also made important contributions to improving the theoretical level of flame retardant industry in China and expanding international exchanges. He has published six Monographs on flame retardant materials, and his latest 1.6 million-word Handbook on Flame Retardant Plastics will be published this year. In addition, he has published more than 100 papers on flame retardant technology, hosted and organized three international conferences on flame retardant technology held in Beijing, and edited many collections of this paper. These monographs and papers are widely cited in the domestic flame retardant industry, and are praised as foundational works, which help to improve the theory and technology level in the field of flame retardant in China. His book "Flame Retardant" won the first prize of Petrochemical ** Science and Technology Book in 2006, Flame Retardant Polymer Material won the first prize of National Defense Industry Publishing House ** Book in 2001, and Practical Flame Retardant Technology was awarded the top-quality textbook of Beijing Higher Education in 2004. The book "Flame Retardants" is also called "Bible" by Mr. Sherling of Nardmann Rassmann Company in Germany.

China Plastic Processing Industry Association believes that Ouyuxiang's work in the field of flame retardant materials has played an active role in promoting the scientific and technological progress of modified plastics, especially flame retardant plastics, improving the flame retardant and environmental protection properties of plastics products, especially electronic and electrical products, and has made outstanding contributions to the processing and manufacturing of plastics products.

Ou Yuxiang is working with his colleagues to make great efforts to advance to the forefront of flame retardant science and technology in the world.