【摘要】 针对环氧清漆涂料导电性差,高压脉冲电场杀菌防污效果差的问题,提出掺杂碳黑制成碳黑导电复合涂料的方法。通过抗菌实验研究了高压脉冲电场下碳黑改性涂料的杀菌性能、介电损耗性能和防腐、防污性能,利用宽频介电阻抗谱仪测试掺杂碳黑涂料的介电损耗,通过电化学测试研究海水中涂层的腐蚀行为。结果表明:在高压脉冲电场下,碳黑复合涂层的杀菌效果优于环氧树脂清漆涂料,其灭菌率高达98%以上;碳黑掺杂涂层的介电损耗均低于未掺杂的涂层样品,碳黑掺杂量在0.5%时介电损耗最低,电能损失较小;碳黑掺杂量为0.5%时,环氧树脂涂层的电阻相比于环氧树脂清漆未有显著变化,但随着掺杂碳黑量的增加,涂层的抗介质渗透能力越来越低,涂层抗腐蚀性能下降。因此,掺杂碳黑质量分数低于0.5%时获得的碳黑改性复合涂料达到杀菌率较高、涂层本身防护性能较好、介电损耗较低的优良性能。更多还原

【Abstract】 Carbon black composite coating is proposed to focus on the problem that epoxy varnish coating has poor sterilization and antifouling effect in high-voltage pulsed electric field due to the poor electrical conductivity.In order to explore the sterilization properties,dielectric loss performance and electrochemical behavior of carbon black modified coatings,sterilization experiments,dielectric loss test using broadband dielectric impedance spectrometer and electrochemical test were investigated.Results show that the carbon black modified composite coating has better sterilization properties than epoxy resin varnish coating under high voltage pulse electric field with the sterilization rate more than 98%.Moreover,the dielectric loss of carbon black composite coating was lower than epoxy resin varnish and when mixed 0.5% carbon black,dielectric loss to a minimum.Electrochemical tests showed that 0.5% carbon black doping will not cause the coating corrosion resistance dropping while the corrosion resistance of coating declines with the carbon black content increase.So less than 0.5%carbon black modified composite coating achieves high sterilization rate,good protection performance and has the good performance of low dielectric loss.更多还原