Effects of Preparation Process Parameters on Performance of Microencapsulated Paraffin/Polyurea Phase Change Materials

Abstract:

In this paper, Microencapsulated paraffin/polyurea (PU) phase change materials were prepared through an interfacial polymerization method using composite paraffin with solid/liquid mass ratio 3:7 as core materials, 2,4 toluene diisocyanate and ethylenediamine as monomers, NP-10 as an emulsifier. It was investigated the effects of emulsion speed, the amount of emulsifier and polymerization temperature on the particle size and coating efficiency and storage-energy performance of microencapsulated paraffin / PU phase change materials. The results showed when the emulsion speed is 2000r/min and the amount of emulsifier to core material is 6% and the polymerization temperature is 70°C, Microencapsulated paraffin / PU phase change materials have better performance: the melting point of 28.1°C, the enthalpy of 58.4KJ/Kg, coating efficiency of 87.5%, the average particle size of 3~4μm, and the uniform particle size distribution.

• Periodical: Advanced Materials Research (Volume 900)
• Pages: 233-237
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.900.233
• Online since: February 2014
• Authors: Wu Sheng Luo*, Sheng Fei Yu, Jie Min Zhou
• Keywords: Cooling Curve, Interfacial Polymerization, Microcapsule, Paraffin, Polyurea

References

[1] Hasnain S.M. Review on sustainable thermal energy storage technologies, part I: Heat storage materials and techniques[J]. Energy Conversion and Management, 1998, 39(11): 1127-1138.

DOI: 10.1016/s0196-8904(98)00025-9

[2] Guan Xuemao, Sun Qian, Zhu Jianping, et al. Review on thermal conductivity and liquid phase leakage of paraffin based phase change material [J]. New Chemical Materials, 2013, 4(1): 146-148.

[3] Cho J.S., Kwon A., Cho C.G. Microencapsulation of octadecane as a phase-change material by interfacial polymerization in an emulsion system[J]. Colloid and Polymer Science, 2002, 280(3): 260-266.

DOI: 10.1007/s00396-001-0603-x

[4] Lu Shaofeng, Xing Jianwei Zhang Zhaohuan, et al. Characterization of polyurea microencapsulated phase change materials prepared by interfacial polycondensation [J]. Polymer Materials Science and Engineering, 2010, 26(12): 39-42.

[5] Zhou Yansi, Wang Yuan, Ji Junling. Study on double-shell thermal insulated microcapsules synthesized by interfacial polymerization [J]. Textile Auxiliaries, 2013, 30(2): 17-20.

[6] Xin Changzheng, Wang Lina, Deng Zhaoxi. Effect of monomer molar ratio on performance of UF/low melting point paraffin microcapsules [J]. China Synthetic Resin and Plastics, 2013, 30(4): 29-33.

[7] Han Shuai, Huang Dianwu. Preparation and characterization of microencapsulation paraffin [J]. Journal of Jiaxing University, 2012，24(3): 80-83.

[8] F. Tiarks, K. Landfester and M. Antonietti, Silica nanoparticles as surfactants and fillers for latexes made by miniemulsion polymerization[J]. Langmuir, 2001, 17 (19), 5775-5780.

DOI: 10.1021/la010445g