聚甲基丙烯酸甲酯包覆十二醇微胶囊的制备及表征

发布时间：2018-01-28 05:14

本文关键词： 正十二醇相变材料聚甲基丙烯酸甲酯微胶囊悬浮聚合法　出处：《复合材料学报》2017年01期 　论文类型：期刊论文

【摘要】：以相变物质正十二醇(DA)为芯材,聚甲基丙烯酸甲酯(PMMA)为壁材,采用悬浮聚合法制备了正十二醇-聚甲基丙烯酸甲酯(DA@PMMA)微胶囊。通过差示扫描量热仪(DSC),扫描电镜(SEM),透射电镜(TEM),傅里叶变换红外光谱仪(FIIR)和热重分析仪(TGA)等仪器对微胶囊进行检测表征。结果表明:当工艺为苯乙烯-马来酸甘钠盐(SMA)加入量占DA质量的7.5%,偶氮二异丁腈(AIBN)加入量占单体甲基丙烯酸甲酯(MMA)质量的7.5%,芯材壁材质量比为2∶1,搅拌速度为1 000r/min时,所制备的微胶囊整体性能最好。DA@PMMA微胶囊为球形,平均粒径26μm,DA@PMMA微胶囊中DA的质量分数为66%。DA@PMMA微胶囊的熔化焓和结晶焓分别是137.6J/g和132.8J/g。TGA和FIIR的分析表明,DA@PMMA微胶囊具有良好的性能。
[Abstract]:The phase change substance (12) was used as the core material and the polymethyl methacrylate (PMMA) as the wall material. The microcapsules of 12 alcohol-polymethyl methacrylate (DAPMA) microcapsules were prepared by suspension polymerization. The microcapsules were characterized by differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). Transmission electron microscopy (TEM). The microcapsules were characterized by Fourier transform infrared spectroscopy (FIIR) and thermogravimetric analyzer (TGA). The results showed that the process was styrene-sodium maleate (SMA). The addition amount is 7.5% of the DA mass. The ratio of AIBN to MMA was 7.5%, the ratio of core material to wall material was 2: 1, and the stirring speed was 1 000 r / min. The overall properties of the prepared microcapsules were the best. The microcapsules were spherical with an average diameter of 26 渭 m. The mass fraction of DA in DA@PMMA microcapsules is 66. the enthalpy of melting and the enthalpy of crystallization of the microcapsules are 137.6 J / g and 132.8 J / g 路TGA and FIIR, respectively. Our analysis shows. DA@PMMA microcapsules have good performance.
【作者单位】：上海应用技术学院香料香精技术与工程学院;
【基金】：上海市“联盟计划”(LM201528)
【分类号】：TB34
【正文快照】： 随着传统能源的日益枯竭和环保低碳意识的兴起,如何提高能源的利用效率越来越受人们的重视。相变材料[1]可以通过其相变过程中的相变潜热来实现能量的储存和利用,有助于提高能源效率。但相变材料本身在相变过程中存在流动、相容性差和腐蚀性等问题。采用微胶囊技术[2]制备相

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