溶剂/非溶剂法合成的核壳结构Al@PVDF粉末的氧化机理

Oxidation Mechanism of Core-Shell Structured Al@PVDF Powders Synthesized by Solvent/Non-Solvent Method.

作者信息

Wang Chuanbin, Qin Mei, Yi Zhuoran, Deng Haoyuan, Wang Junjie, Sun Yi, Luo Guoqiang, Shen Qiang

机构信息

State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430062, China.

Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Chaozhou 521000, China.

出版信息

Materials (Basel). 2022 Apr 22;15(9):3036. doi: 10.3390/ma15093036.

DOI:10.3390/ma15093036

PMID:35591371

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9101485/

Abstract

Micron-sized aluminum (Al) powders are extensively added to energy-containing materials to enhance the overall reactivity of the materials. However, low oxidation efficiency and energy release limit the practical application of Al powders. Polyvinylidene fluoride (PVDF), the most common fluoropolymer, can easily react with Al to form aluminum fluoride (AlF), thus promoting the oxidation of Al powders. In this paper, core-shell structured Al@PVDF powders were synthesized by solvent/non-solvent method. Thermal analysis results show that the weight and exothermic enthalpy of Al@PVDF powders are 166.10% and 11,976 J/g, which are superior to pure Al powders (140.06%, 6560 J/g). A detailed description of the oxidation mechanisms involved is provided. Furthermore, constant volume pressure results indicate that Al@PVDF powders have outstanding pressure output ability in the environment of 3 MPa oxygen. The study provides a valuable reference for the application of Al powders in energetic materials.

摘要

微米级铝（Al）粉被广泛添加到含能材料中以提高材料的整体反应活性。然而，低氧化效率和能量释放限制了铝粉的实际应用。聚偏氟乙烯（PVDF）是最常见的含氟聚合物，它能轻易与铝反应形成氟化铝（AlF），从而促进铝粉的氧化。本文采用溶剂/非溶剂法合成了核壳结构的Al@PVDF粉末。热分析结果表明，Al@PVDF粉末的失重和放热焓分别为166.10%和11976 J/g，优于纯铝粉（140.06%，6560 J/g）。文中提供了所涉及氧化机制的详细描述。此外，定容压力结果表明，Al@PVDF粉末在3 MPa氧气环境中具有出色的压力输出能力。该研究为铝粉在含能材料中的应用提供了有价值的参考。