Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (3): 20230474.doi: 10.7503/cjcu20230474

• Article: Inorganic Chemistry • Previous Articles     Next Articles

Storage Weathering Resistance of Zeolitic Acoustically Enhanced Materials

MENG Qinghua1(), SHI Chao2   

  1. 1.School of Chemistry and Chemical Engineering,Shanghai Jiaotong University,Shanghai 200240,China
    2.School of Textile and Clothing,Yancheng Institute of Technology,Yancheng 224051,China
  • Received:2023-11-13 Online:2024-03-10 Published:2023-12-29
  • Contact: MENG Qinghua E-mail:qhmeng@sjtu.edu.cn

Abstract:

In this work, the effects of different humidity and organic compounds on resonance frequency offsets(RFOs) of acoustically enhanced materials(AEM) were studied. Undergoing 25 ℃/50% relative humidity(RH) or 25 ℃/95%RH storage, coexisting with organic compounds, the changes of RFOs of AEM, composed of zeolite with various silicon-aluminum ratios(SAR), were comprehensively discussed. The results showed that for the AEM composed of zeolite with a specialized silicon-aluminum ratio, the RFOs did not change significantly, after 25 ℃/50%RH and 25 ℃/95%RH storage. The results of the nitrogen adsorption experiment at 25 ℃/50%RH and 25 ℃/95%RH showed that nitrogen molecules occupied only a small part of the specific surface area at 25 ℃, and the presence of water molecules did not affect the adsorption of nitrogen molecules. The water molecules adsorbed at 25 ℃/95%RH will gradually desorb after standing at 25 ℃/50%RH. After coexisting with different types of organic compounds, the RFOs of AEM had different trends. For organic compounds with small size, with partially reversible adsorption, the RFOs of AEM did not change significantly; for organic compounds with larger size or terminal groups of smaller size, because of inserted adsorption, the RFOs of AEM were significantly reduced.

Key words: Acoustically enhanced material, Zeolite, Resonance frequency, Storage weathering resistance

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