不可逆温敏变色油墨的显色动力学探究  

Color Kinetics of an Irreversible Thermochromic Ink

作　　者：俞胡斐 钱静 YU Hu-fei;QIAN Jing(Jiangnan University,Jiangsu Wuxi 214122,China)

机构地区：[1]江南大学,江苏无锡214122

出　　处：《包装工程》2022年第11期46-53,共8页Packaging Engineering

基　　金：国家重点研发计划重点专项(2018YFC1603300);无锡科技局产业前瞻和关键技术(现代农业)(N20193008);江苏省苏北专项(SZ-SQ2017049)。

摘　　要：目的探究温敏变色油墨对时间、温度的响应情况,以及不同制备配方对其动力学参数的影响。方法利用光生酸剂的分解反应使结晶隐性紫染料开环显色,以此作为变色体系置于丝网油墨中,制备出可随时间–温度累积进行不可逆变色的智能温敏标签。利用分光密度仪测量标签b*值,以标签b*值变化作为测量指标,将其与变色时间进行拟合,探讨油墨组分对标签变色性能的影响。并探究不同组配方下b*值对温度变化的响应,以及不同配方对反应活化能的影响。结果随着时间的积累,油墨印刷标签b*值逐渐减少,标签颜色由浅黄色变成深蓝色;同时,当温度升高,标签的变色速率也随之加快,温度越高,标签所测量的b*值越低,呈现出的蓝色越深。相同温度下标签|Δb*|值较高时,标签的活化能较低。结论该标签对时间、温度的积累均有响应,制备的标签活化能在11.453~27.676 kJ/mol波动,具有应用在食品品质智能监控领域的潜力。The purpose of this paper is to explore the response of thermochromic ink to time and temperature,and the effects of different preparation formulas on its kinetic parameters.An intelligent thermochromic label that can discolor irreversibly with time-temperature accumulation was prepared by using the decomposition reaction of photo-acid genera-tor to discolor leucocrystal violet as a color-change system in screen ink.A spectrodensitometer was used to measure the label b*value,and make the change of label b*value as the measurement index.Then it was fitted with the discoloration time to explore the influence of ink components on the discoloration performance of labels.With the accumulation of time,the label b*value gradually reduced,the label color from light yellow to dark blue;at the same time,when the temperature increases,the rate of discoloration of the label is accelerated.The higher the temperature,the lower the la-bel b*value measured,and the deeper the blue color presented.And the activation energy of the label is lower when the label|Δb*|value is higher at the same temperature.In conclusion,the label responds to the accumulation of time and temperature,and the activation energy of the prepared label fluctuates from 11.453 to 27.676 kJ/mol,which has the po-tential to be applied in the field of intelligent monitoring of food quality.

关 键 词：不可逆变色 活化能 丝网印刷 

分 类 号：TS871[轻工技术与工程]