基于GA及大津法的碳—木纤维材料电学研究

发布时间：2018-12-07 12:43

【摘要】：地球面临着森林资源紧缩,环境污染严重,温室效应持续,雾霾天气频发等诸多生态问题,迫使世界各国对生态环境的保护及自然资源可持续利用的重视与日俱增,政府和公众对于环保绿色资源利用的坚决态度使得天然环保材料的研究近些年来得到广泛关注。加之电气时代的到来,电磁污染及静电污染等材料污染干扰着人们的生活,研发出既保护环境又能防止电磁污染和静电作用的生活材料成为目前研究人员关注的焦点,同时也将带来生活优质化的新方向。本论文主要研究木—碳纤维复合材料,首先通过热压工艺完成复合材料样本的制备,然后根据样本对其裁板进行宏观性能的测试,其中包括测量表面电阻率、电磁屏蔽性能等电学性能,对所得数据进行简单分析,把握宏观上变换趋势；为更加准备把握复合材料性能变化,利用基于遗传算法的图像分割技术对木-碳纤维复合材料进行微观电镜图像分割,选取有代表性的复合材料样板电镜图像对其进行特征提取,提取出碳纤维的形态特征,并将其有代表性的形态特征与其宏观电学性能进行比较研究,根据大体规律研究材料微观特征与宏观性能之间的联系,根据数据研究,发现提取出的微观形态可以证明出碳纤维在木纤维中是否分布均匀与材料电学性能是否良好可用有直接重要联系,根据复合材料微观结构的可设计性特点,可以根据微观特征对宏观性能上好的影响条件对材料进行合理化设计,发现微观上只有解决碳纤维在材料中均匀分布且有相互搭接才能提高其宏观性能,从而实现有目的性的提高宏观性能的目标。通过论文分析研究,科学的将材料微观特征与宏观联系有效结合,证明了碳纤维的均匀性及其搭接形成闭合回路对于其电学宏观性能影响颇大,从而证明了复合材料导电原理并为制得性能良好的板材提供目标性指导,同时也可以通过观察其微观性能大体确定该材料是否可以用于作为电学材料进行使用。
[Abstract]:The earth is faced with many ecological problems, such as tight forest resources, serious environmental pollution, persistent Greenhouse Effect, frequent haze weather, etc., which forces countries in the world to pay more and more attention to the protection of ecological environment and the sustainable use of natural resources. The firm attitude of the government and the public towards the use of green resources makes the research of natural environmental protection materials receive wide attention in recent years. In addition, with the arrival of the electric age, electromagnetic pollution and electrostatic pollution and other materials pollution interfere with people's lives. The research and development of living materials that can protect the environment and prevent electromagnetic pollution and electrostatic action have become the focus of attention of researchers at present. At the same time, it will also bring a new direction of quality of life. In this paper, the wood-carbon fiber composites are studied. Firstly, the samples of the composites are prepared by hot pressing, and then the macroscopic properties of the cutting boards are tested according to the samples, including the measurement of the surface resistivity. Electromagnetic shielding performance and other electrical properties, the data obtained by simple analysis, grasp the macro-transformation trend; In order to get a better grasp of the performance change of composite material, the image segmentation technology based on genetic algorithm is used to segment the wood carbon fiber composite with microscopic electron microscope. The typical electron microscope images of composite materials were selected to extract the morphological features of carbon fiber, and the morphological characteristics of carbon fibers were compared with their macroscopic electrical properties. According to the general law, the relationship between the microscopic characteristics and the macroscopic properties of the material is studied, and according to the data, It is found that the extracted microscopic morphology can prove that the distribution of carbon fiber in wood fiber is directly related to the good availability of electrical properties of the material. According to the design characteristics of the microstructure of composite materials, We can rationalize the material design according to the good influence conditions of the macroscopic properties according to the microscopic characteristics. It is found that only by solving the uniform distribution of carbon fiber in the material and having overlap with each other can the macroscopic properties of carbon fiber be improved. In order to achieve a purposeful goal of improving macro performance. Through the analysis and study of the paper, it is proved that the homogeneity of carbon fiber and its lap forming closed loop have great influence on the macroscopic electricity of carbon fiber. The conductive principle of the composite material is proved and the target guidance is provided for the plate with good properties. At the same time, it can be determined whether the composite material can be used as electrical material by observing its microscopic properties.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB33

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