三聚氰胺改性脲醛树脂相变微胶囊的制备及性能分析

发布时间：2018-01-06 21:14

本文关键词：三聚氰胺改性脲醛树脂相变微胶囊的制备及性能分析　出处：《上海应用技术学院》2015年硕士论文　论文类型：学位论文

【摘要】：论文以正十六烷为芯材,三聚氰胺改性脲醛树脂为复合壁材,采用原位聚合法制备了相变微胶囊。利用单因素实验法考察了反应温度、固化PH、芯壁比以及三聚氰胺比例(占三聚氰胺与尿素总质量的百分比)对微胶囊包埋率及包埋效率的的影响,并对各反应条件下制备的微胶囊进行了甲醛含量的测试,得到了一种安全、高热焓的相变微胶囊。利用Fourier红外光谱(FTIR)、扫描电镜(SEM)、热重分析仪(TG)、差示扫描量热仪(DSC)、红外分光光度计等分别研究了微胶囊的结构组成、外貌形态、热稳定性、热焓值等性能以及微胶囊中残存甲醛含量。实验结果表明：在反应温度为45℃、固化PH值为2.5、三聚氰胺比例为30%、芯壁比为1.5：1的工艺条件下制备的微胶囊,呈球形,表面粗糙,但致密性良好,平均粒径为15-20μm,包埋率为53.47%,热焓值为122J/g,耐热温度为170℃,甲醛含量为0.278g/kg,符合欧盟关于甲醛安全标准。因此,本论文在上述工艺条件下获得了高热焓的安全相变微胶囊。
[Abstract]:In this paper sixteen alkyl as core material, melamine modified urea formaldehyde resin as wall material, microcapsules were prepared by in-situ polymerization. The effects of reaction temperature, using single factor experiment method of curing PH, core wall ratio and the ratio of melamine (as a percentage of the total quality of melamine and urea) on microcapsule the embedding rate and encapsulation efficiency of the microcapsules and the reaction conditions for the preparation of the formaldehyde content of the test, get a safe, high enthalpy phase change microcapsules. Using Fourier infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analyzer (TG), differential scanning calorimetry (DSC), infrared spectrophotometer respectively to study the structure of the microcapsule composition, morphology, thermal stability, residual formaldehyde content enthalpy and properties of microcapsules. The experimental results show that the reaction temperature is 45 DEG C, curing pH 2.5, melamine The proportion of 30%, micro capsule, core wall ratio is prepared under the conditions of 1.5:1 is spherical, the surface is rough, but good density, average particle size of 15-20 m, the embedding rate is 53.47%, the enthalpy value is 122J/g, the heat temperature is 170 DEG C, the formaldehyde content is 0.278g/kg, in line with EU customs in formaldehyde safety standards. Therefore, this paper obtained the safety transformation of high enthalpy of microcapsules in the above conditions.

【学位授予单位】：上海应用技术学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB34

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