聚甲基丙烯酸甲酯包覆十二醇微胶囊的制备及表征  

Preparation and characterization of n-dodecanol microcapsules in poly(methyl methacrylate)

作　　者：宋晓秋[1] 曹龙迪 叶琳[1] 

机构地区：[1]上海应用技术学院香料香精技术与工程学院,上海201418

出　　处：《复合材料学报》2017年第1期191-197,共7页Acta Materiae Compositae Sinica

基　　金：上海市"联盟计划"(LM201528)

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。The N-dodecanol-polymethyl-metharylate（DA@PMMA）microcapsules were prepared by suspension polymerization method with n-dodecanol（DA）as core material and polymethyl-metharylate（PMMA）as outer shell.Microcapsules were characterized by differential scanning calorimetry（DSC）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,fourier transform infrared spectroscopy（FTIR）and thermal gravimetric analysis（TGA）,et al.The results show that the best conditions for preparation of DA@PMMA microcapsules are：Sodium salt of styrene-maleic anhydride polymer（SMA）content is 7.5% to DA,2,2-azobisisobutyronitrile（AIBN）content is 7.5%to methyl methacrylate（MMA）,the core/shell mass ratio is 2∶1,stirring speed is 1 000r/min.DA@PMMA microcapsules are sphericalthe average particle size of DA@PMMA microcapsules is26μm.The mass fraction of DA in DA@PMMA microcapsules is nearly 66% and the latent heats of melting and freezing are found to be 137.6J/g and 132.8J/g.TGA and FIIR analyses also indicate that DA@PMMA microcapsules have good stability.

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 

分 类 号：TQ317.4[化学工程—高聚物工业]