Preparation and characterization of acrylic resin encapsulated n-dodecanol microcapsule phase change material

Abstract

Nontoxic, low-cost microcapsule phase change materials (MicroPCMs) were successfully manufactured via suspension polymerization, in which n-dodecanol was employed as the core material and crosslinked polymethyl methacrylate as the wall material. Alkylphenol polyoxyethylene ether (OP-10), polysorbate-20 (Tween-20), sodium salt of styrene-maleic anhydride polymer (SMA), sodium dodecyl sulfonate (SDS), and hexadecyltrimethylammonium chloride (1631) were employed as emulsifiers to investigate the effects of the type and amount of emulsifier on MicroPCMs. In addition, the effects of different types of crosslinking agents on the fabrication of MicroPCMs were investigated. Scanning electron microscopy was used to observe the micro-morphology of MicroPCMs. The chemical structure of the MicroPCMs was detected via Fourier transform infrared spectroscopy. The thermal properties and thermal stability of the MicroPCMs were analyzed using a differential scanning calorimeter and a thermal gravimetric analyzer, respectively. Particle size distributions of the MicroPCMs were measured using a particle size analyzer. The results demonstrate that MicroPCMs with regular morphology were prepared when the mass ratio of the SMA to the oil phase was 3%, and the latent heat and yield of the MicroPCMs were 80.29 J g−1 and 84%, respectively. Furthermore, the MicroPCMs were successfully synthesized using pentaerythritol triacrylate containing the hydroxyl group as the crosslinking agent with an average particle size of 14.18 μm and excellent thermal stability.

Fabrication of Organic Shape-stabilized Phase Change Material and Its Energy Storage Applications

“…Using suspension polymerization, [137] PMMA/n-dodecanol shell/core microencapsulated SSPCM was developed in which the effects of different emulsifier and crosslinking agent were also investigated. The average SSPCM particle size is 14.18 μm.…”

Antibacterial Cellulose Fibers Spun from Ionic Liquid and Enriched with Plant Essential Oils

“…The mass ratio of core to wall materials and oil to water phase was vital during microcapsule preparation procedures, and thus, the effect of oil to water phase (1:10, 1:15, 1:20, 1:25, 1:30) and core to wall materials of microcapsule (3:1, 2:1, 1:1, 1:2, 1:3) was mainly studied. 26 The optimization details are shown in Figures S1, S2. The optimization conditions for the preparation of a stable emulsifier are the system with an oil− water ratio of 1:25 and a core to wall ratio of 1:1.…”

“…The schematic diagram for the preparation of microcapsules (MC) for suspended polymerization is shown in Figure . The mass ratio of core to wall materials and oil to water phase was vital during microcapsule preparation procedures, and thus, the effect of oil to water phase (1:10, 1:15, 1:20, 1:25, 1:30) and core to wall materials of microcapsule (3:1, 2:1, 1:1, 1:2, 1:3) was mainly studied . The optimization details are shown in Figures S1, S2.…”

“…Microcapsules based on PMMA and an essential oil from artemisia annua (AMC) were synthesized via emulsion polymerization. , MMA and AMA monomers (wall material of microcapsule), AIBN, and artemisia annua essential oil (core material of microcapsule) of given weight were added and stirred in the oscillator until the uniform oil solution and phase formed. 10 g of Tween-20 was added into 200 g of deionized water for forming the water phase.…”