相变蓄热颗粒的制备及热性能的实验研究

Experimental Research on Preparation and Thermal Properties of Phase Change Thermal Storage Particles

以双酚A型环氧丙烯酸酯(EA)、季戊四醇三丙烯酸酯(PETA)、α-羟基环乙基苯甲酮的混合物为壳材,石墨(500目)为壳材增强剂,癸酸为芯材制备不同配比的6种试样。分别利用瞬态平面传热法(TPS)、差示扫描量热法(DSC)及热重分析法(TGA)对其做了传热性能的测试、相变性能测试及失重测试,并结合抗压试样综合分析6种试样的性能。实验结果表明:石墨掺量越多传热性能越强,但是试样的抗压能力逐渐下滑;随着掺入芯材癸酸的量的增加,融化起始温度逐渐降低,凝固起始温度逐渐升高,相变潜热逐渐增大,但其抗压强度与弹性位移逐渐下降;在所讨论的6种试样中试样5性能相对较优,失重率约为0.98%,抗压强度为22.3 MPa,弹性位移为0.26 mm。

Six kinds of samples with different ratios were prepared by taking mixture of bisphenol A epoxy acrylate(EA),pentaerythritol triacrylate(PETA),and α-hydroxycycloethyl benzophenone as the shell material,graphite(500 mesh) as the shell material reinforcing agent,and capric acid as the core material.Heat transfer performance test,phase change performance test and weight loss test were carried out by transient plane heat transfer method(TPS),differential scanning calorimetry(DSC) and thermogravimetric analysis(TGA),respectively,and the properties of 6 kinds of samples were comprehensively analyzed based on compression samples.The experimental results show that the more graphite is added,the stronger the heat transfer performance is,while the compressive capacity of the sample was gradually declined.With the increase of the amount of tannic acid added into the core material,the melting initiation temperature decreased gradually,with the solidification initiation temperature rised,the latent heat of phase change increased,the compressive strength and elastic displacement,however,decreased gradually.Among the six samples discussed,sample 5 shows relatively superior properties,with its weight loss rate of about 0.98%,the compressive strength of 22.3 MPa,and the elastic displacement of 0.26 mm.