基于PM2.5过滤的玻璃纤维棉毡的性能研究

发布时间：2018-03-23 14:42

  本文选题：玻璃纤维棉毡　切入点：PM2.5　出处：《南京航空航天大学》2017年硕士论文

【摘要】：随着空气污染日益严重,人们对空气过滤器的需求也日益增加。过滤材料作为过滤器的核心组成部件,是决定空气过滤器过滤精度高低的关键。开发性能优异的空气过滤材料逐步成为科研工作者的研究重点。本课题通过火焰喷吹工艺制备超细玻璃纤维并结合喷胶固化系统制备高效低阻高强度的过滤用玻璃纤维棉毡,可以有效弥补现有纤维过滤材料过滤效率低、过滤阻力高、强度低、耐温差和使用寿命较短等缺陷。提高其综合性能,拓宽其应用范围,尤其是在PM2.5过滤领域具有重要市场价值和现实意义。玻璃纤维棉毡的过滤和力学性能不仅取决于纤维本身的成份、形貌和直径,而且取决于棉毡的厚度、容重、堆积方式、孔隙结构以及纤维之间的缠绕方式。本课题采用滤料过滤性能测试系统、数字式透气量仪和万能材料试验机分别对过滤用玻璃纤维棉毡进行表征,并结合扫描电子显微镜和光学显微镜观察棉毡的结构形貌和过滤特性,为过滤用玻璃纤维棉毡的设计开发和实际应用提供实验指导和理论支持。本文的主要研究工作如下:1、提出火焰喷吹工艺与喷胶固化成型工艺相结合的方法制备玻璃纤维棉毡。棉毡微观结构呈现内部三维网状结构和截面层状结构,厚度和质量的变异系数分别是5.3%和7.2%。棉毡具有较高的均匀性,可有效对PM2.5进行拦截和捕集。2、纤维直径为2μm、棉毡厚度为1.6cm、棉毡容重为20kg/m3和胶粘剂含量为20%的工艺参数下,棉毡的性能最优。此工艺所制备的棉毡对PM2.5的过滤效率为86.2%、过滤阻力为11.0Pa、透气率180.63mm/s和撕裂强度为1834.6N/m。3、将玻璃纤维棉毡放在不同温度下服役不同时间,并测试其性能。结果表明:玻璃纤维棉毡的最高服役温度为240℃,在该温度下服役长时间后棉毡仍能保持较高的过滤效率,稳定的透气性和较高的撕裂强度。
[Abstract]:As air pollution intensifies, so does the demand for air filters, which are the core components of filters. It is the key to determine the filtration accuracy of air filter. The development of air filter material with excellent performance has gradually become the research focus of researchers. The subject is to prepare ultrafine glass fiber by flame injection process and combine it with glue spray. Glass fiber cotton felt for filtration with high efficiency, low resistance and high strength was prepared by curing system. It can effectively compensate for the shortcomings of low filtration efficiency, high filtration resistance, low strength, temperature tolerance and short service life of the existing fiber filter materials, improve its comprehensive performance and broaden its application range. Especially in the field of PM2.5 filtration, the filtration and mechanical properties of glass fiber felt depend not only on the composition, morphology and diameter of fiber, but also on the thickness, bulk density and stacking mode of fiber felt. The structure of the pore and the winding mode between the fibers. In this paper, the filter material filtration performance test system, the digital permeability meter and the universal material testing machine were used to characterize the glass fiber cotton felt for filtration, respectively. The structure, morphology and filtration characteristics of cotton felt were observed by scanning electron microscope (SEM) and optical microscope. This paper provides experimental guidance and theoretical support for the design, development and practical application of glass fiber cotton felt for filtration. The main research work of this paper is as follows: 1. The method of combining flame injection process with plastic spray curing molding process is proposed to prepare glass. Glass fiber cotton felt. The microstructure of cotton felt presents three dimensional mesh structure and cross section layer structure. The coefficient of variation of thickness and quality were 5.3% and 7.2%, respectively. Cotton felt had high uniformity and could effectively intercept and capture PM2.5. The fiber diameter was 2 渭 m, the thickness of cotton felt was 1.6 cm, the bulk weight of cotton felt was 20kg/m3 and the adhesive content was 20%. The performance of cotton felt is the best. The filter efficiency of cotton felt prepared by this process is 86.2 and the filtration resistance is 11.0Pa. the air permeability 180.63mm/s and tear strength are 1834.6N / m ~ (-3). The glass fiber cotton felt is put into service at different temperature for different time. The results show that the maximum service temperature of glass fiber felt is 240 鈩，

本文编号：1653908