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OALib Journal期刊
ISSN: 2333-9721
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聚酰亚胺/纳米MgO复合材料的制备与性能研究
DOI: 10.11777/j.issn1000-3304.2014.13424, PP. 970-975
Keywords: 聚酰亚胺,纳米氧化镁,复合材料,纳米划痕
Abstract:
采用直接分散法将纳米MgO颗粒均匀分散在聚酰胺酸溶液中，经旋涂、热亚胺化制得聚酰亚胺/纳米MgO复合材料.利用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、扫描电子显微镜（SEM）、紫外可见光谱（UV-Vis）、热重分析（TGA）和纳米划痕等测试技术对复合材料的结构和性能进行了表征.结果表明，平均粒径约为20nm的纳米MgO颗粒均匀地分散在聚酰亚胺基体中，有机无机两组分相容性良好；复合材料在可见光区具有优良的光学透明性，在近紫外光区随着纳米MgO含量的增加呈现出了显著的紫外屏蔽性能；纳米MgO的加入能大幅提高复合薄膜的抗划伤性能，在100μN的划痕力下，划痕深度由纯聚酰亚胺的57.4nm降至10nm左右，且划痕的宽度也明显减小；尽管复合材料的热稳定性能较纯聚酰亚胺略有下降，但在300℃以下仍具有较好的热稳定性.
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