(Southwest University of Science and Technology, Mianyang, Sichuan 62 10 10)
This topic is one of the main achievements of the national "863" project (project number: 200 1 AA322070) "Integrated Technology Development of Ecological Functional Basic Materials and Composite Building Materials".
First, the content introduction
1) prepared and compounded mineral functional elementary materials such as zeolite, bentonite and palygorskite.
2) The antibacterial properties of antibacterial elementary materials were comprehensively evaluated by bacteriostatic circle method and shake flask oscillation method. The results showed that zinc-based antibacterial agents, copper-based antibacterial agents, silver-based antibacterial agents and Cu2+-Zn2+ composite antibacterial agents all had strong antibacterial properties against gram-negative bacteria and positive bacteria, and their antibacterial properties were as follows: silver type > copper type ≥ zinc type > zinc-copper type. The antibacterial performance of zinc-based antibacterial agent is close to that of copper-based antibacterial agent, and the antibacterial rate against Escherichia coli and Staphylococcus aureus is greater than 99.9%.
3) The antibacterial coating with excellent antibacterial effect was successfully trial-produced with self-made mineral-based materials. The integrated process of antibacterial substrate-antibacterial coating production was put forward for the first time, which solved the shortcomings of low ion utilization rate, high energy consumption and many steps in substrate preparation. By adopting the integrated technology of antibacterial elements and antibacterial coating preparation, functional coatings with good antibacterial properties and basic properties can be obtained, which saves two processes of filtration, washing, drying and crushing and one process of antibacterial agent dispersion pulping in the production of antibacterial coatings, and realizes zero discharge of waste and recycling of resources.
4) A formula of anti-radon coating was successfully developed, and the proportion and dosage of anti-radon basic materials and their synergistic effect were studied.
And 5) simultaneously applying the antibacterial and radon-proof single material to the coating to prepare the antibacterial and radon-proof composite functional coating. The research shows that the antibacterial and radon-proof basic materials have good compatibility with coatings, and the basic performance of antibacterial and radon-proof composite functional coatings is better than the first-class requirements stipulated by national standards.
6) The multifunctional composite ecological coating was successfully trial-produced.
Second, popularization and application
The product has been produced and applied in two enterprises, reaching a stable application state; Through the relevant network to publish relevant information, there are many enterprises in Jiangsu, Jilin, Chongqing, Yunnan and other places to discuss cooperation; Jiangxi is implementing a large-scale wall radon prevention project to solve the radon prevention problem of its existing projects; The Chinese Academy of Engineering Physics used anti-radon coatings for radon protection in underground engineering of nuclear decommissioning, which achieved remarkable results and won the second prize of military scientific and technological progress in 2006. At present, we are cooperating with Beijing Yin Xie Investment Co., Ltd. and Pangang Great Wall Special Steel Co., Ltd. to invest in the construction of "Radon-proof Ecological Coatings" project, and applying this product to national defense, industry and civil engineering, which is expected to produce good economic benefits.
Three. Identification, awards and patents
The products developed by the project have both single function and multifunctional composite ecological coatings. The products passed the inspection and appraisal by China Center for Disease Control and Prevention, Sichuan Technical Supervision Bureau, China Academy of Engineering Physics, National Infrared Testing Center and West China Medical Center of Sichuan University, and passed the appraisal organized by Sichuan Science and Technology Department in 2005. The overall level reached the international advanced level and won the first prize of Mianyang Science and Technology Progress in 2005.