Non-Chloride in Situ Preparation of Nano-Cuprous Oxide and Its Effect on Heat Resistance and Combustion Properties of Calcium Alginate

Overview

Journal Polymers (Basel)

Publisher MDPI

Date 2019 Nov 14

PMID 31717828

Citations 4

Authors

Peiyuan Shao

Peng Xu

Lei Zhang

Yun Xue

Xihui Zhao

Zichao Li

Qun Li

Affiliations

Soon will be listed here.

Abstract

With Cu complexes as precursors, nano-cuprous oxide was prepared on a sodium alginate template excluded of Cl and based on which the calcium alginate/nano-cuprous oxide hybrid materials were prepared by a Ca crosslinking and freeze-drying process. The thermal degradation and combustion behavior of the materials were studied by related characterization techniques using pure calcium alginate as a comparison. The results show that the weight loss rate, heat release rate, peak heat release rate, total heat release rate and specific extinction area of the hybrid materials were remarkably lower than pure calcium alginate, and the flame-retardant performance was significantly improved. The experimental data indicates that nano-cuprous oxide formed a dense protective layer of copper oxide, calcium carbonate and carbon by lowering the initial degradation temperature of the polysaccharide chain during thermal degradation and catalytically dehydrating to char in the combustion process, and thereby can isolate combustible gases, increase carbon residual rates, and notably reduce heat release and smoke evacuation.

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