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摘要
为促进废弃植物基生物油在道路材料中的高效利用,探明其物化特性对性能的影响程度,采用SARA四组分及GPC渗透凝胶色谱分析方法,对比三种不同来源的植物基生物沥青的化学组成,基于灰关联理论,建立生物沥青族组分、分子量分布情况与基本路用性能间的关联。结果表明,植物基生物沥青的族组成:沥青质(5.4%～6.7%)、胶质(14.8%～16.3%)、芳香分(5.4%～6.7%)、饱和分(31.9%～42.5%);分子量分布:小分子组分含量显著提升,多分散度相对提高;关联性:沥青质含量主要决定感温性,胶质影响延度、脆点等低温性能指标,饱和分和芳香分等轻质组分影响黏弹特性,平均分子量与生物沥青的宏观性能相关,而多分散度与高温稳定性关联性较大。
Abstract
To promote the efficient use of plant-based bio-oil in road materials,the chemical composition of plant-based bio-asphalt from three different sources was compared using SARA four-component test and gel permeation chromatography test.Based on the grey correlation theory,the correlation between bio-asphalt group components,molecular weight distribution and conventional road performance was established,so as to obtain the influence of the composition of bio-asphalt on the road performance.The results shown that the asphaltene content of the bio-asphalt was between 5.4 and 6.7%,the resin content was between 14.8 and 16.3%,the aromatic content was between 32.6 and 45.7%,and the saturation content was between 31.9 and 42.5%.The plant-based bio-oils from different sources increased the content of small molecular components in asphalt,decreased the average molecular weight,and improved the polydispersity.The asphaltene content had the greatest contribution to the temperature sensitivity of the bio-asphalt,while the gelatin content mainly affected the low-temperature performance index.The light components such as saturation and aromatic content had greater correlation with the viscosity.The average molecular weight determined the macroscopic properties of the bio-asphalt,while the polydispersity had significant effect on high temperature stability.
关键词
植物基生物油
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生物沥青
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化学组成
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灰关联分析
Key words
plant-based bio-oil
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bio-asphalt
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chemical composition
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grey relational analysis
植物基生物沥青化学组成与路用性能关联性研究[J].
化工新型材料, 2022, 50(10): 270-274 DOI:10.19817/j.cnki.issn1006-3536.2022.10.052
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基金资助
国家自然科学基金面上项目(51578075,51878063);陕西省交通运输厅科研项目(KY18-09)
