癸酸-肉豆蔻酸相变储热微胶囊的 制备与表征.pdf

全国中文核心期刊
新主统
中国科技核心期刊
?酸-肉三相能微胶
制与表征
郭勇,朱阳倩,伍乾,胡聪,汪海平
(江汉大学光电化学材料与器件教育部重点实验室,化学与环境工程学院,淘北武汉430056)
摘要:以癸酸-肉蔻酸低共熔物为芯材,采用溶剂蒸发汯制各热塑性树脂为壁材的相变材料微胶囊,并对微胶囊的表面形
貌、化学结构和热性能等进行表征,考察了壁材对微胶囊性质的影响。结果表明,当采用聚甲基丙烯酸甲酯(PMMA)为壁材时,所制
微胶囊结构完好,具有较好的热稳定性,囊芯含量为18.95%,相变温度为29.21℃,熔融潜热为19.94J/g。
关键词:相变材料:微胶囊:脂肪酸:低共熔物
中图分类号:TU832.18
文献标识码:A
文章编号:1001-702X(2017)10-0104-04
Prepar ation and characterization of microcapsules with capric-myristic acid
eutectic mixture as phase change materials
GUO Yong, ZHU Yangq ian, WU Qian, HU Cong, W ANG Haiping
( Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education
School of Chemical and Environmental Engineering Jianghan University, Whan 430056, China)
Abstract: A kind of microcapsule containing phase change material of capric-myristic acid eutectic was successfully
prepared by solvent evaporation approach using thermoplastic resin as pol mer wall material. The surface morphology, chemica
structure and thermal properties of the microcapsules were investigated. The influence of different kind of polymer wall material
on the characteristics of microcapsules was studied. The results showed that microcapsules were synthesized successfully and that
polymethylmethacrylate (PMMA)was the best capsule wall material for capric-myristic acid eutectic with excellent heat stability
The melting temperature and melting latent heat were determined to be 29,21T and 19.94 J/g for microcapsules with PMMA. The
core content of the microcapsule was 18.95%
Key words: phase change materials, microcapsule, fatty acid, eutectic
微胶囊相变材料( Micro PCMS)是应用微胶彙技术在固-胶法等,但是这些方法通常都涉及到复杂的合成过程,存留添
液相变材料微粒表面包覆一层性能稳定的高分子膜而构成的加剂等缺点ヨ。与之相比溶剂蒸发法由丁无需调节pH值,
具有核売结构的新型复合相变材料。与传统的相变材料相也不需要特姝的反应试剂,且设备简单、成本低廉,并易于推
变时容易泄露、相分高及腐は性答等问题,因而得到更广泛的应。的研究热ノ业き奖成为相変材料微校美化领域
比,微胶囊相变材料可有效解决传统単一相变材料在发生相广,适合大规模
用,如太阳能利用、军事红外线伪装、节能建筑材料以及航空
脂眆酸类相变材料貝有高的相变潜热、不发生相分离现
航天等领。目前,制各微胶囊相变材料的方法主要包括原象、过冷度和腐蚀性低等优点即。由于单一的脂肪酸相变温度
位聚合法、界面聚合法、悬浮聚合法、乳液柴合法和溶胶-凝较高,通常将2种及2种以上脂肪酸具混,获得脂肪酸低熔
物,再通过微胶囊化进行封装,以解泱其在相变过程中的泄漏
基金项目:光电化学材料与器件教育部重点实验室开放课题
问题門。吴梓敏等以癸酸-棕榈酸二元低共熔脂眆酸为相变
(JDGD-201604)
材料,通过原位聚合法制备了脂肪酸脲醛树脂微胶囊相变材
收稿日期:2017-04-18
料,所制微胶囊的蓄放热性能良好,能起到调节温虔的作用。
作者简介:郭勇,男,1995年生,山西孝义人。通讯作者:注海平,地址:王立久等以月桂酸-肉蔻酸的最低共熔物为芯材,采用本
武汉市济川发区三角湖路8号,E-mail:whp926_130@126.com
休聚合法制各了以聚甲基丙烯酸甲酯为壁材的微胶囊相变材
104。新型建筑材料
2017.10
万方数括