Nanoencapsulation of n-Octadecane Phase Change Material in Self-Assembled Polyelectrolyte by Soft Solution Technique

作者：Iamphaojeen Yuwanda; Siriphannon Punnama^*

来源：International Journal of Polymeric Materials and Polymeric Biomaterials, 2014, 63(17): 918-922.

DOI：10.1080/00914037.2014.886229

• Green chemistry
• nanoencapsulation
• phase change materials
• polyelectrolytes
• self-assembly

Nanoencapsulation of n-octadecane phase change material was performed by facile soft solution technique. An emulsion of n-octadecane and sodium dodecyl sulfate was prepared by high intensity sonication and then mixed with 1-6mM of poly(diallyldimethylammonium chloride) (PDDA) solution. The capsules with globular core-shell structure were obtained via self-assembly of PDDA molecules coated on the primary emulsion droplets, described as PDDA encapsulated n-octadecane (PDDA-en-Oc). Average particle size and -potential of PDDA-en-Oc increased with increasing of PDDA concentration due to the different PDDA conformation and thickness of capsules' shell. The smaller diameter of PDDA-en-Oc, the faster heat releasing and absorption were obtained. However, the increasing of PDDA concentration could improve the encapsulation efficiency, resulting in an increment of latent heat quantity. The PDDA-en-Oc capsules prepared from 4mM PDDA with approximate to 166nm in size possessed the maximum latent heat and encapsulation efficiency (i.e., 124.4J/g and 58%, respectively).

• 出版日期2014