膨胀石墨/聚乙二醇复合相变材料控温效果及与沥青相容性研究
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摘要
以多孔膨胀石墨为载体,固-液相变材料聚乙二醇为功能组分,利用真空吸附法将两者复合,制备出形态稳定的固-固复合相变材料,并对其相变能力、控温效果,以及与沥青的相容性进行了研究.结果发现,复合相变材料中聚乙二醇与膨胀石墨的最佳复合质量比为7∶1;复合相变材料的相变温度(约52℃)和相变潜热(约140J/g)与纯聚乙二醇相似,而过冷度明显减小;复合相变材料的热分解温度高于250℃,热稳定性良好;复合相变材料的控温效果及与沥青的相容性良好,可有效减轻沥青混凝土的温度病害.
Using expanded graphite(EG)as the carrier and solid-liquid phase change material polyethylene glycol(PEG)as the functional component.a stable solid-solid composite phase change material was prepared with the method of vacuum absorption and the phase change ability,temperature control effect and the compatibility with asphalt were analyzed.The results indicate that the best compound ratio of EG/PEG in the composite phase change material is 7∶1.The phase change temperature(about52 ℃)and phase change latent heat(about 140 J/g)are similar with the performances of pure polyethylene glycol,while the supercooling degree decreases obviously.The thermal decomposition temperature is higher than 250 ℃ with a good thermal stability.The temperature control effect and compatibility of asphalt are good,which can effectively reduce the temperature disease of the asphalt concrete.
Using expanded graphite(EG)as the carrier and solid-liquid phase change material polyethylene glycol(PEG)as the functional component.a stable solid-solid composite phase change material was prepared with the method of vacuum absorption and the phase change ability,temperature control effect and the compatibility with asphalt were analyzed.The results indicate that the best compound ratio of EG/PEG in the composite phase change material is 7∶1.The phase change temperature(about52 ℃)and phase change latent heat(about 140 J/g)are similar with the performances of pure polyethylene glycol,while the supercooling degree decreases obviously.The thermal decomposition temperature is higher than 250 ℃ with a good thermal stability.The temperature control effect and compatibility of asphalt are good,which can effectively reduce the temperature disease of the asphalt concrete.
引文
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[3]刘红瑛,戴经梁.不同级配对沥青混合料车辙性能的影响[J].长安大学学报(自然科学版),2004,24(5):11-15.
[4]闫其来.沥青混合料抗车辙性能试验研究[D].南京:东南大学,2006.
[5]曹雪娟,唐伯明,朱洪洲.降低沥青路面温度的热反射涂层性能研究[J].重庆交通大学学报(自然科学版),2010,29(3):391-393.
[6]张亮,晏华,余荣升,等.相变材料的研究进展及其在建筑领域的应用综述[J].材料开发与应用,2010,25(1):69-73.
[7]张东,周剑敏,吴科如,等.相变储能混凝土制备方法及其储能行为研究[J].建筑材料学报,2003,6(4):374-380.
[8]尚建丽,李乔明,王争军.微胶囊相变储能石膏基建筑材料制备及性能研究[J].太阳能学报,2012,33(12):2140-2144.
[9]XAVIER C,NICAISE D,RACHIDI S.The use of phase change materials to delay pavement freezing[C]∥XIII International Winter Road Congress,PIARC,Quebec,2010.
[10]BRYAN M J,BENDER P R,COTE S A,et al.Assessing the feasibility of incorporating phase change material in hot mix asphalt[J].Sustainable Cities&Society,2015,19:11-16.
[11]MOHAMMAD K,CASTRO-GOMES J,AZENHA M,et al.Assessing the feasibility of impregnating phase change materials in lightweight aggregate for development of thermal energy storage systems[J].Construction&Building Materials,2015,89:48-59.
[12]MICHAL R,DENDA H,JASKU?A P.Title:thermal stabilization and permanent deformation resistance of lwa/pcm-modified asphalt road surfaces[J].Construction&Building Materials,2017(1):142-148.
[13]陈美祝,郑少平,吴少鹏,等.月桂酸/有机蒙脱土复合相变材料实验研究[J].武汉理工大学学报,2010(18):4-7.
[14]马骉,王晓曼,李超,等.相变材料在沥青混凝土路面中的应用前景分析[J].公路,2009(12):115-118.
[15]霍曼琳,马保国,魏建强,等.相变储能路面发热融雪材料体系的试验研究[J].武汉理工大学学报(交通科学与工程版),2010,34(6):1177-1181.
[16]师晓鸽,向萌萌.半刚性基层沥青路面的车辙预测[J].城市建设理论研究,2013(1):55-58.