Incorporating ultra-low loading of nanoparticles into polymer matrices can simultaneously improve the dielectric constant and breakdown strength,thereby significantly increasing the capacitance energy storage density of polymer nanocomposites and miniaturing electronics and devices.However,there are still a series of tough issues to be dealt with,such as the use of organic solvents in the current solution blending,which face enormous challenges in scalable preparation and application of the polymer nanocomposites.Here,a dual in situ synthesis strategy is proposed,namely the polymerization of poly(ethylene terephthalate)(PET)synchronizes with the growth of calcium borate nanoparticles.In particular,0.2 wt％calcium borate nanoparticles are uniformly dispersed in the PET matrix without any solvent,and rich compatibility of the interfaces occurs.The dielectric constant reaches 4.91 and the maximum energy storage density is up to 10.69 J/cm3,which is 1.94 times that of neat PET.The unique dual in situ synthesis strategy tends to be extended to the scalable fabrication of polyester nanocomposites filled with a variety of borates,which paves a way for exploring electrical energy storage and other applications of polyester nanocomposites.
关键词
双原位/超低填充/介电性能/储能密度
Key words
Dual in situ synthesis/Ultra-low filled/Dielectric properties/Energy storage density
维普
万方数据