Preparation Of Polyethylene Glycol Cetyl Ether Monoacrylate And Its Fiber Application

Phase change materials (PCMs) are a kind of materials which are able to take advantage of the latent heat of phase change materials to achieve energy storage, conversion and usage. In the case of energy supply being increasingly tighter, this kind of material has received more and more attention. With the improvement of people’s living level, intelligent clothing made of phase change materials, such as thermostatic clothes, winter clothes and so on have been favored by people of all ages. Comb-like polymer is a sort of copolymer with special structure afforded by main chains and side chains. In recent years, it was found that comb-like polymer can be used as phase change materials after modification and exhibit better performance.In this thesis, macromonomer diethylene glycol hexadecyl acrylate (C16E2AC) was synthesized via an alcohol sodium-chloride reaction firstly, and then free-radical polymerization was proceeded to fabricate its polymer, poly(diethylene glycol hexadecyl ether acrylate) (PC16E2AC). After that, graphene oxide (GO) was selected to modified PC16E2AC thanks to its large specific surface area and capillary forces between the lamellar structure. Finally, sheath/core structure composite thermo-regulated fibers were prepared by wet spinning with acrylonitrile-vinylidene chloride copolymer [P(AN-VDC)] acting as sheath and PC16E2AC as core. The structure of PC16E2AC was characterized by FTIR and’HNMR, and the phase change behavior and thermal stability of PC16E2AC, PC16E2AC/GO composite and composite fibers were characterized by DSC and TG. What’s more, the micromorphology of PC 16E2AC/GO composite and the surface and fracture surface of composite fibers were observed by SEM.The results showed that, PC16E2AC not only has stable structure but has suitable phase change temperature, higher enthalpy and good thermal stability. And the shape-stabilized property of PC16E2AC/GO composite was significantly better than the polymer itself. When the content of GO was 5%, PC 16E2AC/GO composite can be both a good shape and high enthalpy. In addition, P(AN-VDC)/PC16E2AC composite fibers showed obvious sheath/core structure, uniform wall thickness, good thermal stability, heat cycle resistance and anti-permeability. In addition, with the changing of sheath/core extrusion ratio, the enthalpy of composite fibers exhibited gradient variation trend.