Preparation and Performance Study of LA-SA/MMA Phase Change Microcapsules
Phase change microcapsules LA-SA/MMA were prepared by in-situ polymerization method,with methyl methacrylate as the wall material and lauric acid and stearic acid as the core material.Using SEM scanning electron microscopy,differential scanning calorimetry,Malvern particle size analyzer,Fourier transform infrared spectroscopy analyzer,and TG thermogravimetric analyzer,microcapsules with different core to wall ratios were observed and detected.The results showed that microcapsules with a core to wall ratio of 4:5 were spheri-cal in shape,with a smooth and flat surface,but there was slight agglomeration and adhesion phenomenon.The capsule wall has a certain protective effect on the core material,effectively improving the thermal stability of the microcapsule.Microcapsules have excellent durabili-ty and can be reused multiple times.Then,different mass fractions of phase change microcapsules were coated onto SMS fabrics using dry coating technology to produce phase change temperature controlled fabrics.Through thermal imaging,discuss whether the thermal storage and temperature control performance of the fabric treated with phase change microcapsule coating is affected.The results show that the fab-ric after coating treatment has a slower decrease in cooling rate and can cope with changes in external environmental temperature.
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