Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 139, Issue 9, Pages -Publisher
WILEY
DOI: 10.1002/app.51724
Keywords
degradation; flame retardance; recycling
Categories
Funding
- National Natural Science Foundation of China [U2004185]
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The study demonstrates a new strategy of using discarded MF foam as solid adsorbents to remove tin ions in wastewater, achieving a high removal rate of up to 99.996%. The products obtained after simple calcination can serve as high-efficiency flame retardants for PVC, significantly reducing heat release rate and smoke production. This approach effectively converts MF foam waste and tin-containing wastewater into valuable flame retardants, promoting environmentally friendly recycling and treatment.
Melamine-formaldehyde (MF) foam has wide applications due to good flame retardancy, excellent sound absorption, and high thermal stability. However, the recycling of MF foam wastes remains a challenge due to its thermosetting nature. Here, we demonstrate a new strategy for discarded foams as solid adsorbents for removing tin ions in simulated tin-containing wastewater. Results showed that the removal rate of tin in simulated wastewater is as high as 99.996%. Moreover, after simple calcination, as-obtained products can be used as high-efficiency flame retardants for flexible poly(vinyl chloride) (PVC), reducing the peak of heat release rate and total smoke production of PVC by 51.8% and 45.8%, respectively, under the condition of 2.5 wt.% addition. In short, this strategy successfully converted MF foam and tin wastewater to valuable flame retardants, opening the way for the environmentally friendly recycling of MF waste and the simultaneous treatment of tin-containing wastewater.
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