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首页> 外文期刊>RSC Advances >Near room-temperature thermocatalysis: a promising avenue for the degradation of polyethylene using NiCoMnO4 powders
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Near room-temperature thermocatalysis: a promising avenue for the degradation of polyethylene using NiCoMnO4 powders

机译：接近室温的热催化：使用NiCoMnO4粉末降解聚乙烯的有前途的途径

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摘要

Polyethylene has been widely used around the world but its degradation is always restricted to being light- or microorganism-assisted. Here, a new irradiation-free and near room-temperature thermocatalytic approach for low density polyethylene (LDPE) degradation is developed by employing NiCoMnO4 as thermocatalyst. LDPE/NiCoMnO4 composites were firstly manufactured by melt blending or physically mixing and then underwent thermal aging in ovens with temperatures ranging from 30 degrees C to 50 degrees C in darkness. NiCoMnO4 is proven to have outstanding thermocatalytic activity and can lead to distinct thermal degradation of composite films both in air and in water. The optimal NiCoMnO4 dosage in composite films is just 1 wt% and for this specific catalyst loaded composite film, its decomposition temperature and weight-average molecular weight reduced by 53.43 degrees C and 79.60% respectively, together with an increase of crystallinity by 5.5% after thermal aging in air at 50 degrees C for 90 days. In addition, a higher degradation degree could be achieved with a further increase of the thermal aging time.
机译：聚乙烯已在世界范围内广泛使用，但其降解始终仅限于光或微生物辅助。在此，通过使用NiCoMnO4作为热催化剂，开发了一种用于低密度聚乙烯（LDPE）降解的新的无辐射，接近室温的热催化方法。 LDPE / NiCoMnO4复合材料首先通过熔融共混或物理混合制成，然后在黑暗中于30摄氏度至50摄氏度的温度下的烤箱中进行热老化。事实证明，NiCoMnO4具有出色的热催化活性，并且可以在空气和水中导致复合膜发生明显的热降解。复合膜中NiCoMnO4的最佳用量仅为1 wt％，对于这种特定的负载催化剂的复合膜，其分解温度和重均分子量分别降低了53.43℃和79.60％，结晶度提高了5.5％。在50摄氏度的空气中热老化90天。另外，随着热老化时间的进一步增加，可以实现更高的降解度。

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