本文選題：玻璃纖維棉氈　切入點(diǎn)：PM2.5　出處：《南京航空航天大學(xué)》2017年碩士論文

【摘要】：隨著空氣污染日益嚴(yán)重,人們對空氣過濾器的需求也日益增加。過濾材料作為過濾器的核心組成部件,是決定空氣過濾器過濾精度高低的關(guān)鍵。開發(fā)性能優(yōu)異的空氣過濾材料逐步成為科研工作者的研究重點(diǎn)。本課題通過火焰噴吹工藝制備超細(xì)玻璃纖維并結(jié)合噴膠固化系統(tǒng)制備高效低阻高強(qiáng)度的過濾用玻璃纖維棉氈,可以有效彌補(bǔ)現(xiàn)有纖維過濾材料過濾效率低、過濾阻力高、強(qiáng)度低、耐溫差和使用壽命較短等缺陷。提高其綜合性能,拓寬其應(yīng)用范圍,尤其是在PM2.5過濾領(lǐng)域具有重要市場價(jià)值和現(xiàn)實(shí)意義。玻璃纖維棉氈的過濾和力學(xué)性能不僅取決于纖維本身的成份、形貌和直徑,而且取決于棉氈的厚度、容重、堆積方式、孔隙結(jié)構(gòu)以及纖維之間的纏繞方式。本課題采用濾料過濾性能測試系統(tǒng)、數(shù)字式透氣量儀和萬能材料試驗(yàn)機(jī)分別對過濾用玻璃纖維棉氈進(jìn)行表征,并結(jié)合掃描電子顯微鏡和光學(xué)顯微鏡觀察棉氈的結(jié)構(gòu)形貌和過濾特性,為過濾用玻璃纖維棉氈的設(shè)計(jì)開發(fā)和實(shí)際應(yīng)用提供實(shí)驗(yàn)指導(dǎo)和理論支持。本文的主要研究工作如下:1、提出火焰噴吹工藝與噴膠固化成型工藝相結(jié)合的方法制備玻璃纖維棉氈。棉氈微觀結(jié)構(gòu)呈現(xiàn)內(nèi)部三維網(wǎng)狀結(jié)構(gòu)和截面層狀結(jié)構(gòu),厚度和質(zhì)量的變異系數(shù)分別是5.3%和7.2%。棉氈具有較高的均勻性,可有效對PM2.5進(jìn)行攔截和捕集。2、纖維直徑為2μm、棉氈厚度為1.6cm、棉氈容重為20kg/m3和膠粘劑含量為20%的工藝參數(shù)下,棉氈的性能最優(yōu)。此工藝所制備的棉氈對PM2.5的過濾效率為86.2%、過濾阻力為11.0Pa、透氣率180.63mm/s和撕裂強(qiáng)度為1834.6N/m。3、將玻璃纖維棉氈放在不同溫度下服役不同時(shí)間,并測試其性能。結(jié)果表明:玻璃纖維棉氈的最高服役溫度為240℃,在該溫度下服役長時(shí)間后棉氈仍能保持較高的過濾效率,穩(wěn)定的透氣性和較高的撕裂強(qiáng)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，

本文編號：1653908