Preparation of Hollow-structure Zinc Stannate Using Carbon Spheres as Template and Its Application in Flame-retardant PVC

doi:10.19491/j.issn.1001-9278.2018.01.018

Abstract

Abstract: The hollow-structured zinc stannate (Zn2SnO4) was prepared by using tin tetrachloride and zinc nitrate as raw materials and carbon spheres as a template via a hydrothermal-calcination method. This method was expected to be applied for the disposal and reuse of heavy metal ions in waste water. The chemical structure of Zn2SnO4 and its flame-retarding effect on PVC were characterized by limiting oxygen index, transmission electron microscopy, cone calorimetry, scanning electron microscopy and X-ray diffraction measurements. The results indicated that the limiting oxygen index of the flame-retardant PVC achieved a limiting oxygen index of 31.4 vol % when 10 g of Zn2SnO4 were added, which increased by 6.5 % compared with the blank PVC. However, the flame-retardant PVC exhibited the similar elongation at break of 241 % to the blank one. The results obtained from cone calorimetry indicated that the introduction of Zn2SnO4 effectively reduced the total heat release by 30.6 % and the total smoke release by 54.3 % during the combustion process of the flame-retardant PVC.

CLC Number:

TQ325.3

References

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