Optimum preparation of organopolysilazane composite coatings and their role in protecting combustible cartridge cases

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL Surfaces and Interfaces Pub Date : 2025-02-01 Epub Date: 2025-01-19 DOI:10.1016/j.surfin.2025.105804

Mengde Wu, Zhenggang Xiao

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Abstract

A series of organopolysilazane (OPSZ) composite coatings were synthesized via a grafting reaction between OPSZ and epoxy resin, which were applied to protect the surfaces of combustible cartridge cases. The chemical compositions were characterized by Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy. The results of heat-resistance tests indicated that the optimum OPSZ composite coating could prevent the combustible cartridge cases from burning for 175.56 s at 250 °C. The glass transition temperatures (T_g) of the OPSZ composite coatings were in the range of 254.7–454.0 °C. The results indicated that the OPSZ composite coatings could effectively improve the heat resistance of combustible cartridge cases. Based on scanning electron microscopy images after saltwater exposure tests, the saltwater absorption rate, and the water contact angle, the OPSZ composite coatings could effectively improve the environmental adaptability of combustible cartridge cases. In this study, the ceramic precursor OPSZ, as a protective material, provides a novel way to fabricate various coatings to protect combustible cartridge cases from high temperatures, environmental humidity, and corrosive air.

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有机聚硅氮烷复合涂层的优化制备及其对可燃弹壳的保护作用

通过与环氧树脂的接枝反应，合成了一系列有机聚硅氮烷（OPSZ）复合涂层，并将其应用于可燃弹壳的表面保护。用红外光谱和x射线光电子能谱对其化学成分进行了表征。耐热试验结果表明，最佳的OPSZ复合涂层在250℃的高温下，可使可燃药筒的燃烧时间达到175.56 s。OPSZ复合涂层的玻璃化转变温度（Tg）在254.7 ~ 454.0℃之间。结果表明，OPSZ复合涂层能有效提高可燃弹壳的耐热性。盐水暴露后的扫描电镜图像、盐水吸收率和水接触角表明，OPSZ复合涂层能有效提高可燃药筒的环境适应性。在本研究中，陶瓷前驱体OPSZ作为一种保护材料，提供了一种新的方法来制造各种涂层，以保护可燃弹药盒免受高温、环境湿度和腐蚀性空气的影响。

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)