复合型除湿材料的制备及性能研究
发布时间：2018-09-19 20:39
【摘要】：室内空气湿度的控制对人们工作生活的舒适性、物品保存以及工业生产过程都扮演着十分重要的角色。本文将膜除湿技术和固体吸附除湿技术结合,制作一种新型的有机-无机复合型除湿材料。具体方法是将玻璃纤维纸和自制硅胶材料作为基材,利用含有膜组分PAAS(聚丙烯酸钠)或PVA(聚乙烯醇)的溶液进行改性处理,再经过干燥、成型处理,得到复合除湿材料。实验过程中对PAAS和PVA浓度及其他添加剂比例进行分析,测试了不同浓度比例所得到的复合材料的吸湿性能,结果显示,PAAS和PVA改性对提高材料的吸湿量都有积极效果,而由硅胶经PVA和氯化锂的混合溶液改性得到的复合材料有最佳的综合性能。按性能最优的实验配方自主制备蜂窝型硅胶除湿转轮,并对其进行一系列的试验分析,包括吸脱附性能分析、孔结构分析、水蒸气吸附量分析、耐高温性分析。还将自制的转轮样品与购置的商品转轮样品进行了吸湿量的实验对比,结果显示,自制转轮样品在90%相对湿度下的最大吸湿量为0.495 g/g,远高于商品转轮的最大吸湿量0.187 g/g,显示出优异的吸湿性能。另外,通过自主搭建试验台模拟不同的运行工况,对转轮材料进行动态的除湿和再生实验分析,考察除湿转轮在不同湿度、再生温度下的性能表现。结果显示,除湿效率和SDP(单位除湿量)这两个性能指标均随湿度的增加和再生温度的增加而呈线性增长的趋势,DCOP(除湿性能系数)作为考量除湿过程和再生过程平衡的性能指标,分析显示当室温下处理空气相对湿度大于80%时,以60℃作为再生温度所得到的DCOP值为0.8~1。此时转轮达到较好的除湿/再生平衡,在应用中能有最佳的除湿性能表现。
[Abstract]:The control of indoor air humidity plays a very important role in the comfort of people's work and life, the preservation of goods and the industrial production process. In this paper, a new kind of organic-inorganic composite dehumidification material was prepared by combining membrane dehumidification technology with solid adsorption dehumidification technology. The specific method is that glass fiber paper and self-made silica gel are used as the base material and the solution containing PAAS (sodium polyacrylate) or PVA (polyvinyl alcohol) is used to modify the composite dehumidification material. After drying and molding the composite dehumidification material is obtained. In the course of experiment, the concentration of PAAS and PVA and the proportion of other additives were analyzed, and the hygroscopicity of the composites with different concentration ratios was tested. The results showed that the modification of PaaS and PVA had positive effects on increasing the moisture absorption of the composites. The composite modified by the mixed solution of PVA and lithium chloride has the best comprehensive properties. The honeycomb silica gel desiccant runner was prepared independently according to the optimum experimental formula. A series of experiments were carried out, including the analysis of desorption performance, pore structure analysis, water vapor adsorption capacity analysis and high temperature resistance analysis. The moisture absorption of the self-made runner sample was compared with that of the commercial runner sample, and the results showed that, The maximum moisture absorption of self-made runner at 90% relative humidity is 0.495 g / g, which is much higher than that of commercial runner (0.187 g / g). In addition, the dynamic dehumidification and regeneration experiments were carried out to investigate the performance of the desiccant runner under different humidity and regeneration temperature by building a test rig to simulate different operating conditions. The results show that the dehumidification efficiency and SDP (unit dehumidification rate) are both linearly increasing with the increase of humidity and regeneration temperature. The analysis shows that when the relative humidity of the air treated at room temperature is greater than 80, the DCOP value obtained by using 60 鈩，
本文编号：2251276
[Abstract]:The control of indoor air humidity plays a very important role in the comfort of people's work and life, the preservation of goods and the industrial production process. In this paper, a new kind of organic-inorganic composite dehumidification material was prepared by combining membrane dehumidification technology with solid adsorption dehumidification technology. The specific method is that glass fiber paper and self-made silica gel are used as the base material and the solution containing PAAS (sodium polyacrylate) or PVA (polyvinyl alcohol) is used to modify the composite dehumidification material. After drying and molding the composite dehumidification material is obtained. In the course of experiment, the concentration of PAAS and PVA and the proportion of other additives were analyzed, and the hygroscopicity of the composites with different concentration ratios was tested. The results showed that the modification of PaaS and PVA had positive effects on increasing the moisture absorption of the composites. The composite modified by the mixed solution of PVA and lithium chloride has the best comprehensive properties. The honeycomb silica gel desiccant runner was prepared independently according to the optimum experimental formula. A series of experiments were carried out, including the analysis of desorption performance, pore structure analysis, water vapor adsorption capacity analysis and high temperature resistance analysis. The moisture absorption of the self-made runner sample was compared with that of the commercial runner sample, and the results showed that, The maximum moisture absorption of self-made runner at 90% relative humidity is 0.495 g / g, which is much higher than that of commercial runner (0.187 g / g). In addition, the dynamic dehumidification and regeneration experiments were carried out to investigate the performance of the desiccant runner under different humidity and regeneration temperature by building a test rig to simulate different operating conditions. The results show that the dehumidification efficiency and SDP (unit dehumidification rate) are both linearly increasing with the increase of humidity and regeneration temperature. The analysis shows that when the relative humidity of the air treated at room temperature is greater than 80, the DCOP value obtained by using 60 鈩，
本文编号：2251276
本文链接：https://www.wllwen.com/kejilunwen/cailiaohuaxuelunwen/2251276.html
