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通过原位聚合法制备了以正十二烷醇(DA)为芯材,密胺树脂(MF)或聚乙二醇改性密胺树脂(PMF)为壁材的相变微胶囊DA@MF和DA@PMF,并将相变微胶囊添加到木粉/高密度聚乙烯复合材料(WF/HDPE)中,制备了具有相变蓄热能力的DA@MF-WF/HDPE和DA@PMF-WF/HDPE复合材料。采用DSC、TG和红外热成像等方法对DA@MF、DA@PMF和相变微胶囊-WF/HDPE的热性能进行了分析与表征。测试结果表明,DA@PMF的结晶和熔融热焓值分别提高了35.0J/g和21.5J/g,快速失重温度提高了19.9℃;蓄热能力测试表明,DA@PMF成功添加至WF/HDPE中,且在制备过程中损失较小;DA@PMF-WF/HDPE的相变温度(27.2、11.3℃)、相变潜热(31.6、20.3J/g)和热稳定性(256.9℃,DA开始失重)等性能表明其具备成为相变蓄热材料的潜力。
The phase-change microcapsules DA @ MF with n-dodecanol (DA) as core material, melamine resin (MF) or polyethylene glycol modified melamine resin (PMF) And DA @ PMF. Phase change microcapsules were added to wood flour / high density polyethylene (WF / HDPE) composites. DA @ MF-WF / HDPE and DA @ PMF- WF / HDPE composite materials. The thermal properties of DA @ MF, DA @ PMF and phase change microcapsule-WF / HDPE were analyzed and characterized by DSC, TG and IR thermography. The results show that the crystallization enthalpy and melting enthalpy of DA @ PMF increase by 35.0 J / g and 21.5 J / g, respectively, and the rapid weight loss temperature increase by 19.9 ℃. The heat storage capacity test shows that DA @ PMF was successfully added to WF / HDPE (27.2, 11.3 ℃), latent heat of transformation (31.6, 20.3J / g) and thermal stability (256.9 ℃, DA start) of DA @ PMF-WF / HDPE Weightlessness) and other properties show that they have the potential to become phase change thermal storage materials.