矿渣纤维复合相变材料的制备与热湿性能的试验研究

发布时间：2018-05-28 22:56

  本文选题：矿渣纤维 + 真空浸渍　； 参考：《西安建筑科技大学》2015年硕士论文

【摘要】：建筑室内环境的舒适性一直是人们追求的热点,空气温度、湿度是影响居住环境舒适度的重要因素之一,而建筑材料的选取会极大影响居住环境的温度、湿度。矿渣纤维作为由工业废料矿渣经高温喷制而成的人工矿物纤维,具有质轻、保温、隔音等性能,常用做保温材料、吸音材料等建筑填充材料,然而将其作为多孔吸附材料却鲜有报导。本文选取矿渣纤维作为原材料,通过NaOH溶液对其进行表面改性,使其光滑表面形成无规则新生产物富硅铝层,从而使吸附性能增强。分别选取Na2SO4·10H2O、复配石蜡、二元脂肪酸(癸酸(CA)-月桂酸(LA))作为相变材料,通过步冷曲线法、DSC法以及红外光谱法表征其热性能,得到最优配比的相变材料。将矿渣纤维对制得的相变材料进行吸附,采用真空浸渍法,对不同压力、浸渗时间、材料比例条件下制备的复合相变矿渣纤维进行了正交试验研究。通过差示扫描法、吸放湿平衡曲线法对矿渣纤维相变材料温湿性能进行测试,利用扫描电镜对其形貌、结构进行分析。结果表明:复合石蜡/纤维在97%湿度环境下最大平衡吸湿量达9.3%,其相变温度为27.54℃,相变潜热为105.6J/g,具有良好的调温调湿效果。将此复合材料添加到石膏中制备石膏基复合材料,为使石膏试块具有一定强度,在石膏中掺入0.8%掺量的萘系减水剂,通过确定不同掺量下石膏基储热复合材料的用水量,检测不同掺量下的抗折、抗压强度,并对按照不同掺量制备的六组试样进行热,湿性能的测试及微观分析,最终确定出最佳掺和比。
[Abstract]:The comfort of indoor environment is always the hot spot that people pursue. Air temperature and humidity are one of the important factors that affect the comfort of living environment, and the choice of building materials will greatly affect the temperature and humidity of living environment. Slag fiber, as an artificial mineral fiber made from industrial waste slag sprayed at high temperature, has the properties of light weight, heat preservation, sound insulation and so on. It is often used as building filling material such as insulation material, sound-absorbing material and so on. However, it is rarely reported as porous adsorption material. In this paper, slag fiber is selected as raw material, surface modification is carried out by NaOH solution to make the smooth surface of slag fiber form irregularly new product silicon-rich aluminum layer, and the adsorbability is enhanced. Na2SO4 10H _ 2O, paraffin wax and binary fatty acid (CACA-Lauryl acid) were selected as phase change materials. The thermal properties of the phase change materials were characterized by step cooling curve method and infrared spectroscopy, and the phase change materials with the best proportion were obtained. The composite phase change slag fibers prepared under different pressure, infiltration time and material ratio were studied by the vacuum impregnation method. The temperature and moisture properties of phase change material of slag fiber were measured by differential scanning method and moisture absorption equilibrium curve method. The morphology and structure of phase change material of slag fiber were analyzed by scanning electron microscope (SEM). The results show that the maximum equilibrium moisture absorption of composite paraffin / fiber is 9.3 under 97% humidity, the phase transition temperature is 27.54 鈩，

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