新型填料对于无石棉垫片性能影响的研究

发布时间：2018-07-11 11:26

本文选题：无石棉垫片 + 填料　；参考：《昆明理工大学》2017年硕士论文

【摘要】：无石棉垫片作为一种密封件以其污染小,对人体危害小等优点,慢慢取代了石棉密封垫片的位置,应用于生产和生活的各个方面。但是,相对于石棉垫片来说,无石棉垫片在某些密封性能方面存在劣势。为了使无石棉垫片具备更好的力学性能以及抗老化性能,本文从无石棉垫片填料的选择出发,以纳米二氧化钛、膨胀石墨两种填料作为重点研究对象,对比分析两种填料对无石棉垫片性能的影响。综合考虑制取无石棉垫片所需的性能以及成本等因素,基于填密理论,选择膨胀性石墨和纳米级二氧化钛,分别与高岭土、滑石粉和云母组合作为填料。其中为使纳米级二氧化钛获得良好的表面接枝偶联剂,具有更好的分散性,选用表面经过无机表面包覆处理过的纳米二氧化钛。本文基于均匀试验设计表以及纳米二氧化钛和膨胀石墨等填料的取值范围设计出U*9(94)的均匀试验设计表,以所制取垫片的压缩回弹性能、拉伸性能、蠕变松弛性能的取值建立回归方程式,通过检验发现所建立的回归方程式都呈显著性。通过对回归方程以及性能测试值的分析,发现膨胀石墨以及二氧化钛对于垫片的压缩回弹性能的具有一定的影响作用;纳米二氧化钛通过对传统填料的阳离子化改性而使垫片的拉伸性能好于含膨胀石墨填料的垫片;对于垫片的蠕变松弛性能,无论纳米二氧化钛还是膨胀石墨均对垫片性能的提升有显著作用。考虑实际生产生活中成本的问题,新型填料膨胀石墨相对纳米级二氧化钛更具备应用前景,本文实验数据对于实际生产具有一定的理论指导作用。
[Abstract]:As a kind of sealing piece, the stone-free cotton pad has been used in production and life because of its advantages of less pollution and less harm to human body, and has gradually replaced the position of asbestos seal gasket. However, there are disadvantages in some sealing properties of stone-free cotton pads compared to stone-cotton pads. In order to have better mechanical properties and anti-aging properties of stone free cotton pad, this paper starts from the choice of packing for stone free cotton pad, and focuses on two kinds of fillers: nano titanium dioxide and expanded graphite. The effects of two fillers on the properties of stone-free cotton pads were compared and analyzed. Based on the packing theory, the expansive graphite and nanometer titanium dioxide were selected as fillers with kaolin, talc and mica, respectively. In order to obtain good surface grafting coupling agent and better dispersion of nano-TiO _ 2, nano-TiO _ 2 coated with inorganic surface was selected. Based on the uniform test design table and the range of fillers such as nano-TiO _ 2 and expanded graphite, a uniform test design table of Ut9 (94) was designed to obtain the compression springback and tensile properties of the gasket. The regression equations of creep relaxation properties are established and the regression equations are found to be significant by testing. Through the analysis of regression equation and performance test value, it is found that expanded graphite and titanium dioxide have a certain effect on the compression resilience of gasket. Nano TIO _ 2 makes the gasket better than the gasket containing expanded graphite filler by cationic modification of the traditional filler; the creep relaxation property of the gasket is better than that of the gasket containing expanded graphite filler. Both nano titanium dioxide and expanded graphite play a significant role in improving the performance of gasket. Considering the cost of production and life, the new filler expanded graphite has a better application prospect than nano-titanium dioxide. The experimental data in this paper have a certain theoretical guidance for practical production.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH136

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