摘要
以脲醛树脂为壁材、月桂醇为芯材,采用微波辅助原位包覆聚合反应制备了脲醛树脂/月桂醇相变储能微胶囊(UF/LA-PCESMs),将其与聚乙烯基体混合、造粒,通过熔融纺丝法制得了聚乙烯储能调温纤维(UF/LAPCESMs-PE),并进行了形貌、热性能和力学性能表征。结果表明:随UF/LA-PCESMs含量的增加,纤维的储能潜热稳步增加,实验范围内最高可达74. 52 J/g。在热失重实验中,纤维最大失重速率温度随UF/LA-PCESMs含量增加向高温移动,热稳定性良好。抗张强度随UF/LA-PCESMs含量增加而下降,但在实验范围内(最高为20%)仍可满足常规纤维使用要求。SEM照片显示,UF/LA-PCESMs较好地分布于PE基体中,其结构保留较为完整。
Taking urea-formaldehyde resin as wall material and lauryl alcohol as core material,poly( urea-formaldehyde)/lauryl alcohol phase-change energy storage microcapsules( UF/LA-PCESMs) were prepared by microwave-assisted in-situ encapsulation polymerization. And polyethylene energy storage thermoregulated fibers( UF/LA-PCESMs-PE fibers) were obtained by the process of blending( UF/LA PCESMs and PE), granulating and melt spinning. The morphology, thermal and mechanical properties were characterized,respectively. The results show that the latent heat of UF/LA-PCESMs-PE fibers increases steadily with the increase of UF/LA-PCESMs contents and could achieve 74. 52 J/g. The maximum weight loss rate of fibers could move to high temperature with the increase of UF/LA-PCESMs contents. This indicates that UF/LA-PCESMs could improve the thermal stability of PE fibers. The tensile strength decreases with the increase of UF/LA-PCESMs contents. However,the mechanical properties of UF/LA-PCESMs-PE fibers could still satisfy with the requirements of textile( UF/LA-PCESMs contents range from 0 to 20 wt%).The results of SEM show that UF/LA-PCESMs are well distributed in PE matrix and the structure remains intact.
引文
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