Designing Coconut Oil Encapsulated Poly(stearyl methacrylate‐co‐hydroxylethyl metacrylate) Based Microcapsule for Phase Change Materials

Abstract

Phase change material (PCM) is an effective energy storage application, which has a relatively low cost. In this study, biobased PCMs were prepared by using two techniques: encapsulation and UV-curing. Encapsulated-PCM was synthesized by suspension polymerization with stearyl methacrylate (SMA) and hydroxyethyl methacrylate (HEMA). In encapsulation process, the microcapsules were prepared from poly(stearyl methacrylate-co-hydroxyethyl methacrylate) shell and coconut oil (CO) core. UV-cured form stable PCM was also prepared by radical addition polymerization of stearyl methacrylate, hydroxyethyl methacrylate and coconut oil. In UV-curing process as in the second process, coconut oil was trapped within the polymeric network without covalent bonding. Thermal storage feature of encapsulated-PCM and UV-cured form stable PCM was investigated. The melting enthalpy of encapsulated-PCM is 119 J/g, which is higher than both the melting enthalpy of pure coconut oil (106 J/g) and UV-cured form stable PCM (47 J/g). Moreover, thermal degradation results of PCMs show that the maximum thermal decomposition temperature of encapsulated-PCM increased compared with UV-cured from stable PCM.[a] Dr.

Silver Nanoparticles From Cassia alata L. Incorporated to Coconut Oil‐Oleogel Based Ointment As An Alternative for Diabetes Mellitus Wound Healing: Optimization, In Vitro and In Vivo Tests

“…The broad and shallow absorption in the 3700-3100 cm À 1 region in the oleogel spectra indicates the presence of the À OH group, which indicates the formation of a gel network due to hydrogen bonding. [48] However, experimental use of Na-CMC did not affect the resulting oleogel. This is because Na-CMC is a polymer in salt form so it cannot be dispersed well in an oleogel system whose main base is non-polar oil.…”

Encapsulation methods for phase change materials – A critical review

“…Oktay et al [165] compared two methods to prepare biobased microcapsules, suspension polymerization and UV-curing (see Fig. 75 below).…”

Thermal Properties of Novel Phase-Change Materials Based on Tamanu and Coconut Oil Encapsulated in Electrospun Fiber Matrices

“…The encapsulation of PCM in solid matrices can drastically simplify their application in construction elements. Several studies reported PCM applications of encapsulated coconut oil [25][26][27][28][29][30]. The encapsulation of coconut oil in a biochar matrix [25] for thermal insulation resulted in a maximal latent heat of 74.6 kJ/kg.…”

“…A coaxial electrospinning technique was reported by Ranodhi Udangawa et al, and coconut oil was encapsulated in the core of a cellulose shell [26]. Coconut oil encapsulated by electrospinning can be successfully used for thermoregulation in the temperature range from 7 to 22 • C. Oktay et al [27] encapsulated coconut oil with two different methods: microencapsulation and UV curing. The melting enthalpy of such microencapsulated oil was 12% higher compared to that of pure coconut oil.…”