Copper-cyclodextrin metal-organic framework as a green catalyst for the thermal decomposition of nitrocellulose

IF 6.3 2区化学 Q1 POLYMER SCIENCE Polymer Degradation and Stability Pub Date : 2024-08-18 DOI:10.1016/j.polymdegradstab.2024.110958

Yameng Chai , Wenjia Li , Fuqiang Du , Jianchun Zhao , Shiying Li , Yajun Ding , Sanjiu Ying , Jie Zhou

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Abstract

Copper-cyclodextrin metal-organic framework (Cu-CD-MOF) prepared via the vapour diffusion method was applied as an environmentally friendly catalyst for the pyrolysis process of nitrocellulose (NC). The structural and thermal properties of Cu-CD-MOF were comprehensively and meticulously characterized. Differential scanning calorimetry results disclosed the good compatibility of Cu-CD-MOF toward NC. The NC/Cu-CD-MOF mixture exhibited a decrease of 21.6 KJ/mol in energy barrier, which was resulted from the catalytic characteristics. The TG-FTIR measurement confirmed the maximum pyrolysis rate temperatures of NC/Cu-CD-MOF mixture was decreased by 0.9 °C than NC. Furthermore, Cu-CD-MOF was able to accelerate the rupture of the –O–NO₂ bond and the secondary self-catalytic reaction. The toxic and harmful gas concentrations were also reduced. This work provided a now path to design green catalysts for NC-based materials.

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铜-环糊精金属有机框架作为硝化纤维素热分解的绿色催化剂

通过蒸汽扩散法制备的铜-环糊精金属有机框架（Cu-CD-MOF）被用作硝化纤维素（NC）热解过程的环保型催化剂。对 Cu-CD-MOF 的结构和热性能进行了全面细致的表征。差示扫描量热法结果表明，Cu-CD-MOF 与 NC 具有良好的相容性。NC/Cu-CD-MOF 混合物的能障降低了 21.6 KJ/mol，这是催化特性的结果。TG-FTIR 测量证实，NC/Cu-CD-MOF 混合物的最大热解速率温度比 NC 降低了 0.9 ℃。此外，Cu-CD-MOF 还能加速 -O-NO2 键的断裂和二次自催化反应。有毒有害气体的浓度也有所降低。这项工作为设计基于 NC 材料的绿色催化剂提供了一条新途径。

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.