采用原位聚合法制备了含直链烷烃(芯)和密胺树脂(壳)的微胶囊,并运用Schroder公式计算芯材理论复配比,使其相变温度符合人体适宜温度。考察乳化剂用量、分散剂用量、乳化速率、乳化时间和预聚体滴加速度等因素对微胶囊包封工艺和物理性能的影响。采用差示扫描量热法(DSC)测定出微胶囊相变材料的相变温度和相变焓,并通过扫描电镜(SEM)和傅里叶变换红外光谱(FT-IR)等手段对微胶囊的形貌、化学成分和粒度分布进行了表征。结果表明:微胶囊制备的最优工艺条件为:乳化剂用量5%,分散剂用量2%,乳化速率8000r/min,乳化时间15min,预聚体倒入速度应为60min;微胶囊相变温度范围在19.52～31.30℃之间,并且具有较大的储能作用。
Microcapsules containing direct alkane (core) and melamine resin (shell) were prepared by in-situ polymerization.The theoretical compounding ratio of core material was calculated by Schroeder formula to make the phase transition temperature conform to the appropriate temperature of human body.The effects of emulsifier dosage,dispersant amount,emulsifying rate,emulsifying time and drop acceleration of prepolymer on the encapsulation process and physical properties of microcapsules were studied.The phase change temperature and enthalpy of phase change of microcapsules were measured by differential scanning calorimetry (DSC).The morphology,chemical composition and particle size distribution of microcapsules were characterized by scanning electron microscopy (SEM) and fourier transform infrared spectroscopy (FT-IR).The results shown that the optimum technological conditions for the preparation of microcapsules were as follows: the amount of emulsifier was 5%,the amount of dispersant was 2%,the emulsification rate was 8000r/min,the emulsification time was 15min,and the pouring speed of prepolymer should be 60 min.The phase change temperature of microcapsules was 19.52～31.30℃ and had a large energy storage effect.
[1] 辛成,陆少锋,申天伟,等.高导热性微胶囊相变材料的研究进展[J].化工新型材料,2018,46(7):1-4.
[2] 李志生,张姝婷.相变材料的研究进展与应用综述[J].建筑节能,2016,44(4):57-60.
[3] 史巍,王传涛.相变材料研究综述[J].硅酸盐通报,2015,34(12):3517-3522.
[4] 苏小燕.相变材料微胶囊在纺织品中的研究发展[J].现代纺织技术,2011(1):54-56.
[5] Beglarigale A,Seki Y,Demir N Y,et al.Sodium silicate/polyurethane microcapsules used for self-healing in cementitious materials:monomer optimization,characterization,and fracture behavior[J].Construction and Building Materials,2018,162:57-64.
[6] Al-Ansari M,Abu-Taqa A G,Hassan M M,et al.Performance of modified self-healing concrete with calcium nitrate microencapsulation[J].Construction and Building Materials,2017,149:525-534.
[7] 林书乐,王坤,程江,等.微胶囊技术新进展[J].高分子材料科学与工程,2012,28(5):179-181.
[8] 师欢,王毅,冯辉霞,等.微胶囊相变材料研究进展[J].应用化学,2013,42(1):123-127.
[9] 马万鹏,张伟,赵阳,等.微胶囊自修复材料的研究进展[J].化工新型材料,2012,40(6):12-14.
[10] Rabanel J M,Banquy X,Zouaoui H,et al.Progress technology in microencapsullation methods for cell therapy[J].Biotechnology Progress,2009,25(4):946-963.
[11] Dubey R,Shami T C,Rao K U B.Microencapsulation technology andapplications[J].Defence Science Journal,2009,59(1):82-95.
[12] Wang Xianfeng,Li Chunhong,Zhao Tao.Fabrication and characterization of poly(melamine-formaldehyde)/silicon carbide hybrid microencapsulated phase change materials with enhanced thermal conductivity and light-heat performance[J].Solar Energy Materials and Solar Cells,2018(183):83-84.
[13] 高晓晓.负载纳米TiO2/Ag相变微胶囊的制备与应用[D].西安:西安工程大学,2011.
[14] 元以中,孙金煜,李欣岑,等.三聚氰胺甲醛原位聚合制备微胶囊化热致变色材料[J].化工新型材料,2016,44(7):70-72.
[15] 申天伟,陆少锋,辛成,等.微胶囊化相变材料性能评价方法研究进展[J].应用化工,2018,47(8):1762-1766.
[16] 田娜娜,刘艳君.聚乙二醇在调温纺织品中最佳配比的研究[J].产业用纺织品,2016,34(7):22-27.
[17] Xiao Liguang,Ding Rui,Sun Hao.A new kind of shape-stabilized phase change materials[J].Jouranl of Wuhan University of Technology-Materials Science Edition,2011,26(3):491-494.
[18] 柳思.服装用相变材料微胶囊的制备与应用[D].广州:华南理工大学,2013.
[19] 宋云飞,娄鸿飞,吕绪良,等.原位聚合法制备微胶囊的研究进展[J].化工新型材料,2018,46(9):30-33.
基金资助
咸阳市重大科技计划项目(2017KJ-209)
PDF
(1705KB)
