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

机译:非氯化物原位制备纳米氧化亚铜及其对藻酸钙耐热性和燃烧性能的影响

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摘要

With Cu complexes as precursors, nano-cuprous oxide was prepared on a sodium alginate template excluded of Cl and based on which the calcium alginateano-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.
机译:以Cu配合物为前驱体,在不含Cl的海藻酸钠模板上制备了纳米亚铜氧化物,并在此基础上通过Ca交联和冷冻干燥工艺制备了海藻酸钙/纳米亚铜氧化物杂化材料。通过相关的表征技术,以纯海藻酸钙为比较,研究了材料的热降解和燃烧行为。结果表明,杂化材料的失重率,放热率,峰值放热率,总放热率和比消光面积均明显低于纯海藻酸钙,阻燃性能明显提高。实验数据表明,通过降低热降解过程中多糖链的初始降解温度并在燃烧过程中催化脱水成炭,纳米氧化亚铜形成了致密的氧化铜,碳酸钙和碳保护层,从而可以隔离可燃物。气体,增加碳残留率,并显着减少热量释放和排烟。

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