玻璃纤维增强氯氧镁复合材料耐水性研究

以电镜观测, X 射线衍射谱图分析, 结合传统性能试验手段, 对氯氧镁复合材料的耐水性进行研究, 通过掺加改性剂试验, 优选出K₃ (X·Y₆) 为最佳改性剂, 其浸水三个月的软化系数保留在0. 94。同时利用现代测试技术, 对其改性机理进行了探索。      

Synthesis and properties of perfluorinated alkyl silicone oil modified epoxy resin

Perfluorinated alkyl silicone oil （PFASO） was successfully synthesized from N-ethyl-N- hydroxylethyl perfluorinated octane sulfonamide, succinie anhydride and amino silicone oil by esterification and amide reaction at moderate temperature in the presence of different catalysts. The chemical structure of the synthesized samples was characterized by Fourier transform infrared spectroscopy （FT-IR）, the relative molecular mass（MM） and molecular mass distribution（MMD） of PFASO were tested by gel filtration chromatography（GFC）. A commercial epoxy resin （DGEBA） was modified with PFASO, with the content of PFASO 1-5 phr. Thermo-gravimetric analysis （TGA）, impact tests, scanning electron microscope （SEM） and water contact angle test were applied to provide accurate results on the thermal stability, toughness and hydrophobicity of PFASO/epoxy complex. The experimental results reveal that epoxy resins can be successfully modified by adding a small amount of as-synthesized modifiers via simple direct mixing, and verify that the as-synthesized modifier can improve the toughness and hydrophobicity of epoxy resin without sacrificing its thermal properties.     

玻璃纤维增强氯氧镁复合材料力学性能研究

研究了玻璃纤维增强氯氧镁复合材料的制备，力学性能、影响力学性能的因素及其微观破坏机理。     

EVA乳胶液对纤维增强氯氧镁水泥界面性能的影响

通过采用聚合物乳胶液EVA对氯氧镁水泥改性以及用EVA对玻纤进行表面处理两种不同的工艺,制备氯氧镁复合材料试样并进行宏观和微观性能测试,研究了EVA乳胶液对纤维增强氯氧镁水泥界面性能的影响趋势,并探讨了其作用机理。实验结果表明:EVA作为添加剂加入水泥中能明显改善纤维增强氯氧镁水泥的界面粘结性能;而用EVA作表面处理剂处理纤维对界面粘结性能没有明显的影响。     

Preparation of Nano-SiO2 / amino-modified polysiloxane hybrid superhydrophobic coating and thermal-stability characterization

We put forward a large-area and cost-effective method to fabricate superhydrophobic coating by introducing in-situ functionalized nano-SiO2 into side-amino modified hydroxy-terminated polydimethylsiloxane(SA-HTPDMS) curing system. With the characterization using water contact angle(WCA) tester, Fourier transform infrared spectroscopy(FTIR), scanning electron microscope(SEM), atomic force microscopy(AFM) and simultaneous thermal analysis, the as-prepared coating displayed a tremendous WCA of 154.8±1°, sliding angle(SA) about 3.5° and stable self-cleaning property range from-10 to 80 ℃. It was also found that the synergistic effect of surface micro-nano hierarchical structure and chemical hydrophobicity, stability from matrix had made contributions to the superhydrophobicity and excellent heat resistance up to 300 ℃.