The Preparation Of Flame Retardant Microcapsule And Phase Change Materials Microcapsule And Their Application In Fabric

In our research, we use paraffin as core material and melamine- urea -formaldehyde resin (MUF) as the shell, by in-situ polymerization, synthesize single shell Microcapsulated Phase Change Materials (PCMs). The properties of Microcapsulated PCMs were investigated by using Transmission Electronic Microscopy (TEM), Differential Scanning Calorimeter (DSC), Thermogravimetry-Differential Thermal Analysis (TG-DTA), Infrared Spectroscopic Analysis (IR), Laser Size detector (LS), etc. The number-average diameter of single shell Microcapaule is Nano diameter. This kind of single shell Microcapaule has apparent heat-storing property, and his heat resistant is enhanced as well. The number-average diameter of double shell Microcapaule is Micro diameter. This kind of double shell Microcapaule has better heat resistant. The most important factor that effect the output of single shell capsules is pH value and the kind of emulsifier, then the ratio of core to shell and the effect of stirring rate isn't very important; Only reaching to certain dispersator's stirring rate can we get the Nanocapaule. The faster the stirring rate of dispersator reaches the smaller size of the capsule we get. But when the stirring rate of dispersator reach to 8000r/m, the effect of stirring rate of dispersator isn't obvious. Emulsifier affects the output of single shell capsules and at the same time it affects the capsules ratio of paraffin.We use chloride paraffin as core, MUF as shell, by in-situ polymerization to synthesize the Nanocapsulated flame retarded materials. Their properties were investigated by using Scanning Electronic Microscopy (SEM), Thermogravimetry-Differential Thermal Analysis (TG-DTA), Infrared Spectroscopic Analysis (IR), Laser Size detector (LS), etc. The number-average diameter of Microcapsule is Nano diameter. This kind of Microcapaule has better heat resistant than chloride paraffin itself. Only reaching to certain dispersator's stirring rate can we get flame retarded nanocapsules. The faster the stirring rate of dispersator, the smaller size of the capsule we get. But when the stirring rate of dispersator reach to 8000r/m, the effect of stirring rate of dispersator isn't obvious. The heat resistance of the flame retarded nanocapsules is obviously better than chlorination paraffin itself. We also find only choosing certain emulsifier can we make chlorinated Paraffin become capsules. And in order to mix the chlorinated Paraffin and cyclohexane uniformity, we need certain emulsify time. The adding of cyclohexane not only decreases the capsule temperature, but also enhances the decomposition temperature.By mixing the Microcapauled PCMs with cellulose, the cellulose film has apparent heat-storing property. The influence of different capsule content to the breaking strength of cellulose film was discussed. The result indicates that when the capsule content reaches to 10%, the breaking strength has the biggest value. By finishing with padding process, the PET fabric has an apparent heat-storing property. Binding the Microcapauled PCMs with PET fabric makes the fabric' breaking strength decrease, but when the capsule content is 5-10%, the decrease value isn't obvious for the fabric.