羧甲基纤维素/蜜胺树脂相变纳米储能材料的制备与表征

以羧甲基纤维素(CMC)改性的蜜胺树脂作为壁材,以石蜡为芯材,采用原位聚合法,制备CMC改性的蜜胺树脂相变纳米胶囊。采用FTIR、DSC、SEM及光学显微镜等现代分析仪器对产物的性能进行分析和表征,探讨乳化剂种类和芯材乳液制备转速对胶囊制备过程的影响。结果表明,采用复配乳化剂制备的相变胶囊的性能要优于使用单一乳化剂制备的相变胶囊;当制备芯材乳液的转速为8 000 r/min时,芯材乳液的性能最好;所制得的相变胶囊为球形、平均粒径约为50 nm,且包裹完全、粒径均匀,相变焓为81.87 J/g。

Preparation and Characterization of CMC/Melamine Resin Nano-encapsulated Phase Change Energy Storage Materials

Nanocapsulated phase change materials were prepared by in-situ polymerization, using melamine-formaldehyde resin modified by carboxymethyl cellulose （CMC） as the shell and phase change material paraffin as the core. The properties of the products were studied by FTIR, SEM, DSC, and optic microscope, and the influences of the emulsifier sort and stirring rate of paraffin emul- sion preparation on the preparation process of phase change capsules were investigated. The results showed that the phase change cap- sules prepared with anionic emulsifier and nonionic emulsifier are superior to those prepared with simple emulsifier. The performance of paraffin emulsion is optimal when the stirring rate is 8000 r/min in the preparation process of paraffin emulsion. The phase enthalpy of the phase change nano-capsules is 81.87 J/g and the average particle size is about 50 nm with full wrap and uniform size.