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用二氧化涂层的二酸对环氧树脂阻燃性的影响

Chao Liu^1,2, Lixin Wei², Boyu Ma³

¹Heilongjiang Provincial Key Laboratory of Oilfield Applied Chemistry and Technology, Daqing Normal University Daqing 163712 China.

|September 13, 2024

概括

一种新型的酸 (DAP@SiO2) 增强了环氧树脂 (EP) 的阻燃性和机械性能. 这种阻燃剂提高了热稳定性,并通过UL-94 V-0,为苛刻的应用提供了更安全的替代方案.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
消防安全工程消防安全工程

背景情况:

环氧树脂 (EP) 具有优良的性能,但由于其固有的易燃性,限制了它们在高火风险应用中的使用.
开发用于环氧树脂的有效阻燃剂对于扩大其应用范围至关重要.

研究的目的:

合成和描述一个新的外核心层次结构架构,DAP@SiO2,用于增强环氧树脂阻燃性.
研究阻燃机制并评估含有DAP@SiO2.2的环氧树脂复合材料的热,机械和消防安全性能.

主要方法:

在酸 (DAP) 上通过现场的二氧化生长合成DAP@SiO2.
使用电子显微镜和红外光谱学进行表征.
评估热稳定性 (热重力测量分析),火灾行为 (LOI,垂直燃烧,热量测量) 和机械性能 (拉力,弹性模量,冲击强度).

主要成果:

DAP@SiO2在DAP颗粒上呈现出均的二氧化涂层.
使用12%的DAP@SiO2的环氧树脂复合材料获得了UL-94 V-0评级和33.2%的LOI.
加入DAP@SiO2提高了热稳定性,减少了热释放和烟雾产生,以及增强了机械性能 (拉伸强度,弹性模量,冲击强度).

结论:

DAP@SiO2通过协同气体和凝结相机制,作为环氧树脂的有效阻燃剂和烟雾抑制剂.
由于氨基群交联,DAP@SiO2和环氧树脂之间的增强界面兼容性有助于提高机械性能.
DAP@SiO2为开发高性能,防火环氧树脂材料提供了一个有前途的解决方案.

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