【Ten Years of Rapid Development in Chemical Equipment】From 2017 to 2024, Tianjin established the world’s first COFs production demonstration line with a capacity of tons per year
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This post was last edited by “Fish Swimming in the Desert” on January 21, 2025, at 16:10. Let’s give a thumbs up and encouragement to the achievements made by China’s chemical technology and equipment industry. Your participation in the discussion is the greatest motivation for us! ********************** [Ten Years of Great Development in Chemical Equipment] This is a continuously updated compilation post; everyone is welcome to join the discussion: https://bbs.hcbbs.com/thread-3576046-1-1.html ***************** [The world’s first ton-scale mass production! This Nankai achievement is world-class! In March 2024, Yaoke New Materials (Tianjin) Co., Ltd., leveraging the core technology of melt-based green synthesis developed by Professor Zhang Zhenjie from the School of Chemistry at Nankai University, was the first to overcome the world-wide challenge of mass-producing COFs. It established the world’s first pilot production line for COFs on a tonnage scale, achieving an industrialization breakthrough from a scale of 1 to 100. This landmark world-class scientific and technological achievement broke international technological monopolies and achieved a \"overtake on a curve\"”
The team led by Zhang Zhenjie from Nankai University has proposed a new method for the melt-green synthesis of COFs. This approach does not require solvents, improves crystallinity and porosity, and is easy to scale up for production. It has been used to manufacture various high-quality COFs, enabling the establishment of production lines capable of handling tonnage levels of output and overcoming technical barriers. Covalent organic frameworks (COFs) are crystalline porous polymers meticulously constructed from organic building units through dynamic covalent bonds. It exhibits an ordered two-dimensional or three-dimensional network structure; it not only has a high porosity but also possesses well-defined and customizable functions, along with excellent chemical stability. For this reason, COFs exhibit unique properties and great potential for application in various fields such as gas storage, separation, catalysis, energy storage, water collection, drug delivery, and sensing.
The synthesis of COF traditionally employs the solvothermal method, which is carried out using organic solvents in Pyrex tubes; however, this method has numerous drawbacks, such as the difficulty in measuring the powdered product, environmental pollution, and the use of high-boiling-point and toxic solvents. Furthermore, the operational complexity of COF powder, molding issues, and processability all limit its further application. To address these issues, Researcher Zhang Zhenjie from Nankai University and others proposed an innovative COF synthesis method. This method is based on the principle of organic solvent synthesis, requires no additional solvents, and has broad applicability; it has been successfully used to prepare various types of COFs, including those with olefinic linkages, imide linkages, and Schiff base COFs. More importantly, this method improves the crystallinity and porosity of COF, while avoiding many of the drawbacks of solvothermal synthesis. Typically, the conventional synthesis of COF takes 3–5 days, and the subsequent washing steps also require 1 day to obtain pure COF. Furthermore, this solution provides a detailed process for producing COF on a kilogram scale using commercially available monomers. The resulting COF materials perform excellently in separation applications, particularly as adsorption materials in industrial gas separation and water treatment. The relevant research findings have been published in the journal Nature Protocols under the title “Flux synthesis of two-dimensional covalent organic frameworks”.
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