摘要
为节省微胶囊的制作成本,贯彻绿色环保的理念,以废弃植物油为芯材,制备以三聚氰胺-尿素-甲醛树脂为壁材的微胶囊。通过激光粒度分析仪、同步热分析仪、荧光显微镜及扫描电镜探究了微胶囊的粒径、热稳定性能和外观形貌;通过延度、软化点、针入度和黏度试验,研究微胶囊对沥青性能的影响;采取控制自愈时间、浸水时间和疲劳加载次数的方式,利用动态剪切流变仪研究微胶囊沥青自愈性能受环境影响的规律。结果表明,微胶囊为球形,表面有颗粒凸起,具有良好的芯材负载率和热稳定性能。微胶囊会对沥青的基本性能造成一定影响。研究发现,微胶囊的最佳掺量为0.8%,历经一定程度的浸水和疲劳加载时,微胶囊沥青只需30 min的修复周期即可实现高效自愈。
To reduce the production cost of microcapsules and adhere to the concept of green environmental protection,this study utilizes waste vegetable oil as the core material to prepare microcapsules with melamine-urea-formaldehyde resin as the wall material.The particle size,thermal stability,and appearance of the microcapsules were investigated using a laser particle size analyzer,simultaneous thermal analyzer,fluorescence microscope,and scanning electron microscope.The effects of microcapsules on asphalt properties were studied through tests on ductility,softening point,needle penetration,and viscosity.By controlling the self-healing time,immersion time,and fatigue loading cycles,the environmental influence on the self-healing performance of microcapsule asphalt was investigated using a dynamic shear rheometer.The results indicate that the microcapsules are spherical with protrusions on the surface,exhibiting good core material loading efficiency and thermal stability.The microcapsules have a certain impact on the basic properties of asphalt.The study found that the optimal dosage of microcapsules is 0.8%.After a certain degree of immersion and fatigue loading,the microcapsule asphalt can achieve efficient self-healing within a 30 min repair period.
作者
李正飞
李栓
张康乐
赵龙
杨键鑫
何昊
LI Zhengfei;LI Shuan;ZHANG Kangle;ZHAO Long;YANG Jianxin;HE Hao(School of Civil Engineering and Water Resources,Qinghai University,Xining 810000,China;Key Laboratory of Energy-Saving Building Materials and Engineering Safety,Xining 810000,China)
出处
《应用化工》
北大核心
2025年第11期2825-2830,2838,共7页
Applied Chemical Industry
基金
青海省科技计划项目(2023-ZJ-776)
青海大学大学生科技创新项目(SRT202459)。
关键词
道路工程
微胶囊
沥青
自愈性能
废弃植物油
road engineering
microcapsule
asphalt
self-healing performance
waste vegetable oil
