以正十二烷醇(DA)为芯材,密胺树脂(MF)和聚乙二醇改性密胺(PMF)树脂为壁材制备了相变微胶囊(MicroPCMs),并分别添加到木粉/高密度聚乙烯(WF/HDPE)复合材料中,获得了具有相变蓄热能力的MicroPCMs-WF/HDPE复合材料。采用SEM、FTIR和纳米压痕等方法对MicroPCMs的表面形态、力学性能进行了分析与表征,同时对MicroPCMs-WF/HDPE复合材料的物理力学及热性能进行了测试。结果表明:经聚乙二醇改性后,改性微胶囊(PMF-MicroPCMs)的弹性模量和硬度较未改性微胶囊(MF-MicroPCMs)分别增加了13.9%和30.0%;MicroPCMs-WF/HDPE复合材料的熔融温度区间(22.2~28.7℃)满足人体舒适温度范围,较纯WF/HDPE复合材料温度变化速率明显减缓;相比纯WF/HDPE复合材料,MicroPCMs-WF/HDPE复合材料的吸湿性、冲击强度和表面硬度增加,弯曲和拉伸性能下降;PMF-MicroPCMs-WF/HDPE复合材料的性能均优于MFMicroPCMs-WF/HDPE复合材料,且达到了木塑装饰板材的力学性能标准要求。 Phase change microcapsules (MicroPCMs) were prepared by using n-dodecanol (DA) as core material, melamine resin (MF) and polyethylene glycol modified melamine resin as wall materials, Powder / high density polyethylene (WF / HDPE) composites, MicroPCMs-WF / HDPE composites with phase change thermal storage capability were obtained. The surface morphology and mechanical properties of MicroPCMs were analyzed and characterized by means of SEM, FTIR and nanoindentation. The physical and mechanical properties of MicroPCMs-WF / HDPE composites were also tested. The results showed that the elastic modulus and hardness of the modified microcapsules (PMF-MicroPCMs) increased by 13.9% and 30.0% respectively compared with the unmodified microcapsules (MF-MicroPCMs) after modification with polyethylene glycol. MicroPCMs-WF / HDPE composite melt temperature range (22.2 ~ 28.7 ℃) to meet the comfort temperature range of the human body, compared with pure WF / HDPE composite temperature change rate significantly slowed; compared to pure WF / HDPE composite material, MicroPCMs-WF / HDPE composites The properties of PMF-MicroPCMs-WF / HDPE composites are better than that of MFMicroPCMs-WF / HDPE composites, and reach the mechanical properties of wood-plastic decorative sheet Claim.