界面强度对柔性环氧树脂<strong>/</strong>粘土纳米复合材料热<strong>/</strong>力学性能的影响

doi:10.11901/1005.3093.2021.142

材料研究学报

2022, Vol. 36

Issue (6): 454-460 DOI: 10.11901/1005.3093.2021.142

研究论文

本期目录 | 过刊浏览

界面强度对柔性环氧树脂/粘土纳米复合材料热/力学性能的影响

赵鹏¹, 董英杰¹, 李响¹, 陈斌¹(

), 张英²(

)

^1.沈阳化工大学材料科学与工程学院沈阳 110142
^2.沈阳化工大学理学院沈阳 110142

Effect of Interfacial Strength on Thermal/Mechanical Properties of Flexible Epoxy/Clay Nanocomposites

ZHAO Peng¹, DONG Yingjie¹, LI Xiang¹, CHEN Bin¹(

), ZHANG Ying²(

)

^1.School of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
^2.School of Science, Shenyang University of Chemical Technology, Shenyang 110142, China

引用本文:

赵鹏, 董英杰, 李响, 陈斌, 张英. 界面强度对柔性环氧树脂/粘土纳米复合材料热/力学性能的影响[J]. 材料研究学报, 2022, 36(6): 454-460.
Peng ZHAO, Yingjie DONG, Xiang LI, Bin CHEN, Ying ZHANG. Effect of Interfacial Strength on Thermal/Mechanical Properties of Flexible Epoxy/Clay Nanocomposites[J]. Chinese Journal of Materials Research, 2022, 36(6): 454-460.

全文: PDF(2990 KB) HTML

摘要:

先合成反应型BBDMP30-clay有机化粘土和非反应型CPDMP30-clay有机化粘土,然后以其为纳米增强体分别制备了两种界面强度不同的环氧树脂/粘土纳米复合材料。用透射电子显微镜(TEM)、拉伸实验表征这两种环氧树脂/粘土纳米复合材料并进行动态力学分析(DMA),研究了界面强度对其力学性能的影响。结果表明：这两种纳米复合材料具有几乎相同的无规剥离结构,反应型BBDMP30-clay比非反应型CPDMP30-clay能更有效地提高材料的热/机械性能。粘土质量分数为3.5%时BBDMP30-clay可使纳米复合材料的拉伸强度提高250%,而CPDMP30-clay只能使材料的拉伸强度提高190%。BBDMP30-clay使纳米复合材料的玻璃化转变温度(T_g)提高了6.5℃,而CPDMP30-clay只能使材料的T_g提高2.5℃。这些不同都可归因于这两种纳米复合材料界面强度的差异。

关键词 ：复合材料, 环氧树脂, 粘土, 界面强度, 力学性能

Abstract：

First, two organic clays, manely reactive BBDMP30-clay and non-reactive CPDMP30-clay were synthesized, and then two epoxy resin/clay nanocomposites with different interfacial strength were prepared with the two organic clays as reinforcer respectively. The two epoxy resin/clay nanocomposites were characterized by transmission electron microscopy (TEM) and tensile test with dynamic mechanical analysis (DMA). Further, the effect of interfacial strength on mechanical properties were investigated. The results show that the two nanocomposites have almost the same random peeling structure. The reactive type BBDMP30-clay can improve the thermal/mechanical properties of the composites more effectively than the non-reactive type CPDMP30-clay. When the clay mass fraction is 3.5%, BBDMP30-clay can increase the tensile strength of nanocomposites by 250%, while CPDMP30-clay can only increase the tensile strength of nanocomposites by 190%. BBDMP30-clay increased the glass transition temperature (T_g) of the nanocomposites by 6.5℃, while CPDMP30-clay only increased the T_g by 2.5℃. These differences can be attributed to the difference of the interfacial strength of the two nanocomposites.

Key words： composite epoxy clay interface mechanical properties

收稿日期: 2021-02-15

ZTFLH:

TQ323.5

基金资助:辽宁省教育厅2019年度科学研究经费(LJ2019008);辽宁省教育厅2021年度科学研究经费(LJKZ0441)

作者简介: 赵鹏,男,1996生,硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.142 或 https://www.cjmr.org/CN/Y2022/V36/I6/454

图1 有机修饰剂的合成路线

图2 环氧树脂/粘土纳米复合材料CPDMP30-clay和BBDMP30-clay (粘土质量分数为3.5%)的透射电镜照片

图3 原始粘土和粘土质量分数为3.5%的纳米复合材料的XRD谱

图4 BBDMP30-clay和BBDMP30-clay接枝环氧树脂的TGA曲线

图5 BBDMP30-clay与环氧树脂的反应方程式

图6 环氧树脂/粘土纳米复合材料的应力-应变曲线

表1 纯环氧树脂和环氧树脂/粘土纳米复合材料的拉伸性能

图7 纯环氧树脂及其纳米复合材料的tanδ与温度的关系

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