## 3 Results and Discussion
### Phase Change Properties of Electro-Sprayed mPCM
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline \multicolumn{2}{c}{**Sample Label**} & \multicolumn{2}{c}{**Latent Heat (\(\mathbf{\hat{g}}\)-\(\mathbf{1}\))**} & \multicolumn{2}{c}{\(T_{onset}\) (\({}^{\circ}\)C)} & \multicolumn{2}{c}{\(T_{m}\) or \(T_{e}\) (\({}^{\circ}\)C)} & \multicolumn{2}{c}{\(T_{end}\) (\({}^{\circ}\)C)} & \multicolumn{2}{c}{\(LC\) (\%)} & \multicolumn{2}{c}{\(\mathbf{X_{(obs)}}\) (\%)} & \multicolumn{2}{c}{\(X_{(em)}\) (\%)} \\ \hline \(n\)-eicosane & heating & 205.3 \(\pm\) 1.7 & & 34.3 & & 36.9 & 39.2 & & & & \\  & cooling & 204.2 \(\pm\) 1.9 & & 35.7 & & 30.7 & & 28.7 & & & & \\ \hline PCL-EA & heating & & 57.0 \(\pm\) 1.1 & & 54.9 & & 56.4 & & 58.5 & & & \\  & cooling & & 54.7 \(\pm\) 1.3 & & 41.2 & & 39.5 & & 37.2 & & & \\ \hline \(n\)-eicosane & heating & 42.3 \(\pm\) 2.0 & 32.1 \(\pm\) 1.1 & 32.8 & 55.3 & 35.5 & 57.0 & 36.6 & 59.0 & 20.6 \(\pm\) 1.0 & 68.6 \(\pm\) 3.2 & 32.9 \(\pm\) 1.1 & 29.0 \(\pm\) 1.0 \\ /PCL(30/70)-EA & cooling & 41.2 \(\pm\) 3.1 & 31.3 \(\pm\) 2.7 & 34.2 & 41.4 & 28.1 & 40.3 & 27.3 & 38.5 & & & \\ \hline \(n\)-eicosane & heating & 72.4 \(\pm\) 7.3 & 21.2 \(\pm\) 1.2 & 33.2 & 55.5 & 36.3 & 57.0 & 37.8 & 58.7 & 35.3 \(\pm\) 3.4 & 70.6 \(\pm\) 7.2 & 30.5 \(\pm\) 1.7 & 23.5 \(\pm\) 1.3 \\ /PCL(30/50)-EA & cooling & 72.1 \(\pm\) 7.1 & 21.6 \(\pm\) 1.6 & 34.8 & 42.0 & 29.4 & 40.6 & 28.2 & 39.0 & & & \\ \hline \(n\)-eicosane & heating & 107.2 \(\pm\) 2.4 & 17.8 \(\pm\) 0.5 & 33.9 & 58.8 & 36.4 & 57.1 & 38.4 & 58.6 & 52.3 \(\pm\) 1.1 & 74.7 \(\pm\) 1.6 & 42.5 \(\pm\) 1.3 & 26.7 \(\pm\) 0.9 \\ /PCL(30/50)-EA & cooling & 106.9 \(\pm\) 2.6 & 17.7 \(\pm\) 0.7 & 35.4 & 42.9 & 31.5 & 41.2 & 30.0 & 39.6 & & & \\ \hline PCL-Chl & heating & & 59.6 \(\pm\) 2.0 & & 55.6 & & 57.6 & & 59.8 & & & \\  & cooling & & 57.2 \(\pm\) 1.9 & & 41.5 & & 37.9 & & 34.4 & & & \\ \hline \(n\)-eicosane & heating & 60.2 \(\pm\) 0.2 & 37.3 \(\pm\) 2.4 & 34.0 & 55.4 & 36.0 & 56.7 & 37.1 & 58.1 & 29.3 \(\pm\) 0.1 & 97.8 \(\pm\) 0.4 & 38.2 \(\pm\) 2.4 & 37.9 \(\pm\) 2.4 \\ /PCL(30/70)-Chl & cooling & 59.9 \(\pm\) 1.3 & 38.0 \(\pm\) 5.5 & 35.2 & 41.6 & 30.9 & 40.6 & 30.2 & 39.0 & & & \\ \hline \(n\)-eicosane & heating & 94.3 \(\pm\) 0.8 & 28.1 \(\pm\) 2.5 & 34.2 & 55.4 & 36.3 & 56.7 & 37.7 & 58.6 & 45.9 \(\pm\) 0.4 & 91.9 \(\pm\) 0.8 & 40.3 \(\pm\) 3.5 & 37.2 \(\pm\) 5.4 \\ /PCL(30/50)-Chl & cooling & 93.1 \(\pm\) 3.3 & 29.8 \(\pm\) 4.1 & 34.5 & 41.9 & 32.1 & 40.6 & 30.9 & 39.0 & & & \\ \hline \(n\)-eicosane & heating & 121.1 \(\pm\) 1.9 & 17.4 \(\pm\) 0.6 & 34.3 & 55.6 & 36.7 & 57.0 & 39.6 & 58.3 & 59.0 \(\pm\) 0.9 & 84.3 \(\pm\) 0.7 & 41.6 \(\pm\) 1.3 & 30.4 \(\pm\) 1.0 \\ /PCL(70/30)-Chl & cooling & 117.4 \(\pm\) 1.2 & 17.2 \(\pm\) 0.5 & 35.5 & 43.4 & 31.2 & 41.5 & 29.7 & 39.9 & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Thermal properties of \(n\)-eicosane, neat PCL microspheres and a series of \(n\)-eicosane/PCL microcapsules obtained from ethyl acetate and chloroform solutions at three weight ratios between \(n\)-eicosane and PCL. Differential Scanning Calorimetry was also used to determine the effect of solvent and core compounds on the thermal properties of PCL microparticles. All data were determined from the second run, and the first run was used to clear the thermal history. The DSC thermograms (Figures 4 and 5) show single melting peaks with maximum melting start and end temperatures of 54.9 and 56.4 \({}^{\circ}\)C for ethyl acetate solution, which increase slightly to 55.6 and 57.6 \({}^{\circ}\)C for chloroform. The latent heat of fusion associated with these transitions is approximately 57.0 and 59.5 Jg\({}^{-1}\), which corresponds to a crystallinity degree of 40.8% and 42.7%, respectively. The presence of \(n\)-alkanes in the microparticles does not affect the melting temperatures of the PCL, but at high \(n\)-hexadecane content, there is a slight decrease in crystallization temperatures, while \(n\)-eicosane acts as a nucleating agent of the PCL, and therefore the crystallization temperatures increase.