生物基水性聚氨酯改性乳化沥青的制备及性能研究
Preparation and properties of bio-based waterborne polyurethane modified emulsified asphalt
李明珠 1刘方韬 1肖飞 2陈玉清3
作者信息
- 1. 山东省交通科学研究院,山东济南 250102
- 2. 山东高速基础设施建设有限公司,山东济南 250102
- 3. 齐河县住房和城乡建设局,山东德州 253076
- 折叠
摘要
为推动可再生资源及其低碳沥青材料的研究应用,以香草醛替代部分石油基多元醇制备了生物基水性聚氨酯(BWPU)及其改性乳化沥青(PUA).采用核磁共振波谱、傅里叶红外光谱、分散与稳定性测试、力学拉伸以及态剪切流变试验(DSR),对生物基水性聚氨酯及其改性乳化沥青的性能进行了评价.结果表明,BWPU具有香草醛封端的预期结构和12.85 MPa的拉伸强度、2 055％的断裂拉伸应变,其与基质沥青乳液混合前后均表现出良好的储存稳定性.此外,BWPU的加入使得改性乳化沥青蒸发残留物比基质乳化沥青蒸发残留物具有更高的复模量和更小的相位角,赋予了乳化沥青蒸发残留物优异的弹性性能.
Abstract
To promote the research and application of renewable resources and low-carbon asphalt materi-als,bio-based waterborne polyurethane(BWPU)and its modified emulsified asphalt were prepared by partially replacing petroleum-based polyols with vanillin.The properties of BWPU and its modified emulsi-fied asphalt were evaluated using nuclear magnetic resonance spectroscopy,Fourier-transform infrared spectroscopy,dispersion and stability tests,mechanical tensile tests,and dynamic shear rheological tests(DSR).The results showed that the synthesized waterborne polyurethane exhibited the expected structure with vanillin end-capping and a tensile strength of 12.85 MPa and elongation of 2 055％.Both BWPU and its modified emulsified asphalt showed good storage stability before and after mixing with the base as-phalt emulsion.Furthermore,the addition of BWPU resulted in modified emulsified asphalt with higher complex modulus and smaller phase angle of the residual after evaporation compared to the base emulsi-fied asphalt,imparting excellent elastic properties to the residual of the emulsified asphalt.
关键词
生物基材料/水性聚氨酯/乳化沥青/基础性能/流变性能Key words
bio-based materials/waterborne polyurethane/emulsified asphalt/basic properties/rheolog-ical properties引用本文复制引用
基金项目
山东省自然科学基金面上项目(ZR2020KE024)
出版年
2024
NETL
NSTL
万方数据