期刊
JOURNAL OF CLEANER PRODUCTION
卷 278, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2020.123985
关键词
Gel casting; Alkali activation; Glass foams; Waste glasses
资金
- European Union [739566]
- Slovak Grant Agency of Ministry of Education, Science, Research and Sport [VEGA 2/0091/20]
This manuscript suggests the upcycling of specific chemical composition glasses through the production of highly porous glass foams. The cellular structures were stabilized by gelation of suspensions and viscous flow sintering at 700-800 degrees C. The foams showed excellent strength-to-density ratio and maintained uniform open porosity.
A significant amount of glasses is landfilled because mainstream recycling solutions do not address the articles of specific chemical compositions, including opal glass and glass fibers residues. This manuscript suggests the up-cycling of these glasses through the production of highly porous glass foams. Fine glass powders were dispersed in weakly alkaline solutions, which were foamed by the combination of surfactant addition and intensive mechanical stirring. The cellular structures were stabilized first by the gelation of suspensions, upon drying, then by viscous flow sintering at 700-800 degrees C, for 10-60 min. The foams based on glass fibers reached an excellent strength-to-density ratio, due to the formation of closed cells and partial crystallization. The foams made from opal glass maintained a particularly uniform open porosity, and importantly, also retained the volatile and toxic fluorine due to the rapid, low-temperature sintering. (C) 2020 Elsevier Ltd. All rights reserved.
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