Volume 9 Issue 5
May  2024
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Article Navigation >  Green Energy&Environment  > 2024  >  9(5): 919-926
Shaodi Wu, Ning Zhang, Chizhou Wang, Xianglin Hou, Jie Zhao, Shiyu Jia, Jiancheng Zhao, Xiaojing Cui, Haibo Jin, Tiansheng Deng. An efficient and mild recycling of waste melamine formaldehyde foams by alkaline hydrolysis. Green Energy&Environment, 2024, 9(5): 919-926. doi: 10.1016/j.gee.2022.10.008
Citation: Shaodi Wu, Ning Zhang, Chizhou Wang, Xianglin Hou, Jie Zhao, Shiyu Jia, Jiancheng Zhao, Xiaojing Cui, Haibo Jin, Tiansheng Deng. An efficient and mild recycling of waste melamine formaldehyde foams by alkaline hydrolysis. Green Energy&Environment, 2024, 9(5): 919-926. doi: 10.1016/j.gee.2022.10.008
shu

An efficient and mild recycling of waste melamine formaldehyde foams by alkaline hydrolysis

doi: 10.1016/j.gee.2022.10.008

  • a. Shanxi Engineering Research Center of Biorefinery, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan, 030001, China;

  • b. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China;

  • c. Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology, Taiyuan, Shanxi, 030008, China;

  • d. Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology/College of New Materials and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China

Funds:

This work was supported by the National Natural Science Foundation of China (No. 21774139), China, Key Research and Development Program of Shanxi Province, China (No, 202102040201009), special fund of Beijing Key Laboratory of Clean Fuels and Efficient Catalytic Emission Reduction Technology and the Fund for Shanxi “1331 Project”. Thanks to Ningbo Kejiang Culture Sci. &

Tech. Development Co., Ltd. for the help in schematic drawing.

  • Received date 08 September 2022, Accepted date 25 October 2022, RevRecd date 12 October 2022, Publish date 29 October 2022,
    Abstract
  • Melamine formaldehyde foam (MFF) generates many poisonous chemicals through the traditional recycling methods for organic resin wastes. Herein, a high MFF degradation ratio of ca. 97 wt.% was achieved under the mild conditions (160 ℃) in a NaOH–H2O system with ammelide and ammeline as the main degradation products. The alkaline solvent had an obvious corrosion effect for MFF, as indicated by scanning electron microscopy (SEM). The reaction process and products distribution were studied by Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and 13C nuclear magnetic resonance (NMR). Besides, the MFF degradation products that have the similar chemical structures and bonding performances to those of melamine can be directly used as the raw material for synthesis of melamine urea-formaldehyde resins (MUFs). Moreover, the degradation system demonstrated here showed the high degradation efficiency after reusing for 7 times. The degradation process generated few harmful pollutants and no pre- or post-treatments were required, which proves its feasibility in the safe removal or recovery of waste MFF.

     

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