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Study on the heat resistant property of Ag/4A antibacterial agent
Author(s) -
Bingshe Xu,
Wensheng Hou,
Shuhua Wang,
Liqiao Wei,
Husheng Jia,
Xuguang Liu
Publication year - 2008
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.30883
Subject(s) - materials science , scanning electron microscope , particle size , antibacterial activity , differential thermal analysis , nuclear chemistry , composite material , analytical chemistry (journal) , diffraction , chemical engineering , chromatography , bacteria , chemistry , physics , optics , biology , engineering , genetics
The heat resistant property of silver‐loading zeolite 4A antibacterial agent (SLZ) was investigated by heat treatment methodology. The morphological and structural changes of the specimens were characterized by using differential thermal analyzer (TG‐DTA), scanning electron microscopy, and X‐ray diffraction techniques. The particle size of the specimens was measured by Malvern instruments zetasizer systems, and silver content of specimens was determined by inductively coupled plasma spectrometer. Escherichia coli ( E. coli ) was chosen as indicators of fecal contamination to evaluate the antibacterial effect of the specimens by minimum inhibitory concentration method. The service life of the specimens was also tested. The experimental results indicated that as heat‐treatment temperature increases, the particle size increases, more aggregating occurs, silver content decreases, the color of SLZ gradually changes from white to brown, and the antibacterial ability falls. The release rate of Ag + cation from SLZ became slow after heat treatment at 400, 450, and 500°C, thus resulting in prolonged service life of SLZ. When the heat‐treatment temperature approached 800°C, the collapse of SLZ structure occurred, and the crystals of SiO 2 and Al 2 O 3 were formed after recrystallization. Consequently, the heat resistant temperature of SLZ can be as high as 500°C. SLZ could be used in antibacterial plastics, antibacterial fibers, or biomedical materials. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 2008