摘要
为提升路面冬季运营安全,实现路面低温动态预警,开展了路面低温变色复配物的制备及热色特性的研究。考虑变色温度、变色色差,确定了低温变色复配物各组成材料;通过改变各组分用量,讨论了其对变色复配物热色特性的影响规律;基于加权优序法优选出变色复配物的最优组成比例;在此基础上,通过差示扫描量热法和红外光谱试验揭示了变色复配物的显色机制,并将变色复配物应用于变色标线的制备中,体现出了良好的变色性能与耐久性,验证了变色复配物在道路工程应用的可行性。研究结果表明:显色剂种类决定变色色差,溶剂种类决定变色温度,随着显色剂用量的增加,变色复配物的变色色差和变色温度均减小,随着溶剂用量的增加,变色复配物的变色色差先增加后减小,变色温度升高;通过加权优序法确定隐色剂、显色剂、溶剂的最佳质量比为1∶1∶20;变色复配物的热变色行为是由温度主导的结晶紫内酯与正癸醇之间的相互竞争引起的,低温时结晶紫内酯争夺得到更多的双酚A使体系有色,高温时正癸醇俘获较多的双酚A使体系无色,通过室外耐候耐久试验、磨耗试验、耐污试验证明了变色标线具有良好的变色效果和耐久性。
In order to improve the safety of pavement operation in winter and realize the low temperature dynamic warning of pavement, this study carried out research on the preparation and thermochromic properties of pavement low temperature thermochromic compounds. Considered the thermochromic temperature and discoloration chromatic aberration, the constituent materials of the low-temperature thermochromic compound were determined;the influence on the thermochromic properties of the discoloration compound was discussed by changing the dosage of each component;the discoloration compound was optimized based on the weighted optimization method. On this basis, the color developing mechanism of the thermochromic compounds was revealed by differential scanning calorimetry and infrared spectroscopy, and the thermochromic compounds was applied to the preparation of color-changing markings, reflecting the good discoloration performance and durability verified the feasibility of the discoloration compound in road engineering applications. The research results show that: the type of color developer determines the color difference, and the type of solvent determines the color change temperature. With the increase of the amount of color developer, the color difference and color change temperature of the thermochromic compounds decrease. The discoloration chromatic aberration of the compounds first increase and then decrease, and the discoloration temperature increase. The optimal mass ratio of leuco agent, color developer and solvent was determined by weighted priority method to be 1∶1∶20;crystal violet lactone and n-decyl Alcohols compete for bisphenol A, and crystal violet lactone competes for more bisphenol A at low temperature to make the system colored. At high temperature, n-decanol captures more bisphenol A to make the system colorless. It has passed the outdoor weather resistance test, abrasion test and anti-fouling test prove that the thermochromic marking line has good thermochromic properties and durability.
作者
徐慧宁
王浩达
冀卫东
石浩
韦赟豪
谭忆秋
XU Hui-ning;WANG Hao-da;JI Wei-dong;SHI Hao;WEI Yun-hao;TAN Yi-qiu(School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150090,Heilongjiang,China;State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,Heilongjiang,China)
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2022年第7期55-66,共12页
China Journal of Highway and Transport
基金
科技部重点研发计划项目(2018YFB1600203)
国家自然科学基金项目(51922035)。
关键词
道路工程
低温变色复配物
热色特性
最优组成
竞争显色机制
road engineering
low temperature thermochromic compound
thermochromic property
optimal composition
competitive color chromogenic mechanism
