Study on Mold-inhibiting Sphagnum/Diatomite Composite Humidity-controlling Material
sHU Mingyu1, WANG Hongying1, LIU Zihang2, HU Yuqian1
1 Key Laboratory for Ultra-low Energy Buildings of Jiangxi Province, School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China 2 School of Civil Engineering, Southeast University, Nanjing 211189, China
Abstract: Humidity controlling materials used in humid and hot areas of the south are easily exposed to high humidity for a long time due to moisture absorption, so it is prone to breed mold. In this study, the mold-inhibiting properties of sphagnum/diatomite composite humidity-controlling materials and their components on dominant mold indoors (P. citrinum, Asp. flavus and Asp. niger) were studied by Petri dish experiment. The mold-inhibiting mechanism of sphagnum/diatomite composite humidity-controlling materials was explored according to the environmental scanning electron microscope (ESEM) and energy dispersive spectrometer (EDS) analysis of Asp. niger spores treated with humidity-controlling materials and modified admixtures, the X-ray diffraction (XRD) and EDS analysis of modified admixtures as well as the determination of active O2- in static supernatant of modified admixtures and nucleic acid in leakages from mold spore. The results show that the sphagnum/diatomite composite humidity-controlling materials have good mold-inhibiting properties. The MgO and C2S in the modified admixture are the mold-inhibiting constituents of sphagnum/diatomite composite humidity-controlling materials for the active O2- and hydroxide ion (OH-) produced by them could act on the spores of mold to inhibit or kill mold through destroying the cell structure.
胡明玉, 王红英, 刘子航, 胡裕倩. 抑霉菌泥炭藓/硅藻土复合调湿材料的研究[J]. 材料导报, 2020, 34(14): 14051-14056.
sHU Mingyu, WANG Hongying, LIU Zihang, HU Yuqian. Study on Mold-inhibiting Sphagnum/Diatomite Composite Humidity-controlling Material. Materials Reports, 2020, 34(14): 14051-14056.
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2020, Vol. 34 
