新型相变保温材料的研制与性能

发布时间：2019-02-21 07:36

【摘要】：为了提高保温材料的性能，本文设计了正交试验和混料试验，研制出保温性能、蓄热性能等综合性能优良的新型相变保温材料，综合分析了其相变组分对保温材料性能的影响规律。用扫描电镜和超景深三维显微镜等现代测试手段，分析了此相变保温材料的物相和微观结构，探讨了相变组成影响保温材料性能的机理。研究结果表明：石蜡、十水硫酸钠、聚乙二醇都可以有效提高相变保温材料的保温性能和蓄热性能。正交试验中相变保温材料的最终配合比为：石蜡为1.7%，，物理发泡剂为15%，过氧化氢为13%，聚丙烯纤维为0.4%，此时相变保温材料的导热系数为0.068W/m·K，相变蓄能率为3.142W/kg，抗压强度为0.44MPa，抗折强度为0.31MPa，密度为244.1kg/m3。通过混料设计试验方法，确定了复合相变保温材料的相变组分为：石蜡58.7%，聚乙二醇27.5%，十水硫酸钠13.8%，其导热系数、相变蓄能率分别为0.063W/m·K、3.403W/kg。与单掺石蜡的相变保温材料相比，其导热系数降低了7.35%，相变蓄能率提高了8.31%。相变保温材料改用复合相变组分后保温性能和蓄热性能得到进一步提高。微观分析，加入气泡后改变了相变保温墙体材料的内部孔结构，形成多孔基结构，使这种新型相变保温材料具有良好的保温性能和蓄热性能。本文初步揭示了相变保温材料中各组分对其保温性能、蓄热性能等的影响规律，有助于进一步研究相变保温材料的其他性能。
[Abstract]:In order to improve the properties of thermal insulation materials, orthogonal test and mixing test were designed, and a new type of phase change insulation materials with excellent comprehensive properties, such as thermal insulation and heat storage properties, was developed. The effect of phase change components on the properties of thermal insulation materials was analyzed. The phase and microstructure of the phase change insulating material were analyzed by means of scanning electron microscope and three dimensional hyperfield microscope, and the mechanism of phase transition composition affecting the properties of the thermal insulation material was discussed. The results show that paraffin, sodium sulfate decahydrate and polyethylene glycol can effectively improve the thermal insulation performance and heat storage performance of phase change insulation materials. The final mix ratio of phase change insulation material in orthogonal test is as follows: paraffin is 1.7, physical foaming agent is 15, hydrogen peroxide is 13.3, polypropylene fiber is 0.4.The thermal conductivity of phase change insulation material is 0.068W/m K. The phase change storage rate is 3.142 W / kg, the compressive strength is 0.44 MPA, the flexural strength is 0.31 MPA, and the density is 244.1 kg 路m ~ (3). The phase change components of composite phase change insulating material were determined by mixing design test method: paraffin 58.7, polyethylene glycol 27.55.and sodium sulfate decahydrate 13.8.The thermal conductivity and energy storage rate of phase change were 0.063W/m K, respectively. 3.403W/kg. Compared with the phase change insulating material with only paraffin, the thermal conductivity is decreased by 7.35 and the energy storage rate of phase change is increased by 8.31%. The thermal insulation and heat storage properties of the composite phase change materials were further improved. The microcosmic analysis shows that the internal pore structure of the phase change insulation wall material is changed and the porous base structure is formed after the addition of bubble, which makes the new phase change insulation material have good thermal insulation performance and heat storage performance. This paper preliminarily reveals the influence of the components in the phase change insulation material on its thermal insulation performance and heat storage performance, which is helpful to further study the other properties of the phase change insulation material.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU551

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