二元协同体系(KH570和正硅酸乙酯)对纳米片状铝粉表面改性及性能研究
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摘要
为了提高纳米铝粉耐腐蚀性能,采用溶胶-凝胶法,通过正硅酸乙酯(TEOS)和硅烷偶联剂KH570两种改性剂,在弱碱性的条件下,对片状纳米铝粉进行表面改性,形成具有复合包覆层的Al-TE-KH粒子。利用XRD、扫描电镜和红外光谱对改性前后的铝粉进行微观表征分析,并且通过析氢实验来考查各个样品的耐腐蚀性能。结果表明:复合改性剂TE-KH能够在铝粉表面形成致密均匀的包覆层,并且耐腐蚀性能和抗沉降能力明显优于单个改性剂的作用。
With the view of elevating the corrosion resistance of Al powders,the surface modification of aluminium nanoflakes have been carried out by sol-gel method,resulting in the formation of Al-TE-KH composite,using the tetraethoxysilane(TEOS) and silane coupling agent(KH570) as modifiers under weakly alkaline conditions. Meanwhile,microscopic characterizations of Al powder before and after modification were analyzed by the virtue of the technological tools of XRD,SEM and infrared spectra. And the corrosion resistance of these samples was investigated by hydrogen evolution test. Thereby,the results show that the composite modifier TE-KH sample can form a dense and uniform coating on the surface of Al powders,and its corrosion resistance and anti-sedimentation ability are better than those of single modifier.
With the view of elevating the corrosion resistance of Al powders,the surface modification of aluminium nanoflakes have been carried out by sol-gel method,resulting in the formation of Al-TE-KH composite,using the tetraethoxysilane(TEOS) and silane coupling agent(KH570) as modifiers under weakly alkaline conditions. Meanwhile,microscopic characterizations of Al powder before and after modification were analyzed by the virtue of the technological tools of XRD,SEM and infrared spectra. And the corrosion resistance of these samples was investigated by hydrogen evolution test. Thereby,the results show that the composite modifier TE-KH sample can form a dense and uniform coating on the surface of Al powders,and its corrosion resistance and anti-sedimentation ability are better than those of single modifier.
引文
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[3]高爱环.有机-无机复合层包覆型铝颜料的制备[D].广州:华南理工大学,2010.
[4]张赢超,叶红齐,陈加娜,等.铝粉的表面改性[J].中国粉体技术,2007(2):39-42.
[5]马志领,解飞.二氧化钛包覆水性铝颜料的制备及表征[J].河北大学学报(自然科学版),2017,37(1):40-46.
[6]胡楠,何力军,王立惠,等.硬脂酸钠/Al复合粒子的改性研究[J].宁夏大学学报(自然科学版),2011,32(2):140-143.
[7]陈加娜,叶红齐,邓三毛,等.水介质中制备铝粉颜料的研究[J].粉末冶金技术,2007,25(1):40-43.
[8]刘志芳,刘新红,黄亚磊,等.铝粉表面包覆改性的研究进展[J].材料导报A:综述篇,2017,31(6):73-85.
[9]周丽琼,傅长城,刘寿兵.水性涂料用铝粉颜料的研究进展[J].现代涂料与涂装,2008,11(6):33-35.
[10]胡楠,钟景明,孙本双,等.PVP对球形铝粉进行表面包覆改性的研究[J].中国粉体技术,2011,17(5):6-10.
[11]赵博雷,赵麦群,赵萍.正硅酸乙酯包覆铝银粉抗蚀性的研究及表征[J].粉末冶金技术,2016,34(2):97-100.