Sangregorio Anna, Guigo Nathanael, Vincent Luc, de Jong Ed, Sbirrazzuoli Nicolas
Institut de Chimie de Nice, Université Côte d'Azur, CNRS, UMR 7272, 06108 Nice, France.
Avantium N.V., Zekeringstraat 29, 1014 BV Amsterdam, The Netherlands.
Polymers (Basel). 2022 Mar 3;14(5):1019. doi: 10.3390/polym14051019.
To decrease the environmental impact of bitumen, more sustainable binders should be proposed. This study emphasizes how industrial humins co-produced during the biorefining of carbohydrates can be employed as a macromolecular binder for bitumen. Humins are heterogeneous polyfuranic compounds, and they were mixed at 50 wt% with bitumen. When the non-water-soluble fractions of humins were employed (Hns), no variation of the chemical structure was observed in FTIR spectra after the mixing. The DSC investigations showed that the crystallization of aromatic fractions in bitumen shifted to higher temperature for humins' modified bitumen. The thermogravimetric data highlighted that the presence of humins or Hns in bitumen can lead to mass loss below 200 °C. The rheological investigations highlighted some key advantages of using humins or Hns with bitumen. At high temperatures, the storage modulus of the modified bitumen is increased and shows lower susceptibility to variations in frequency. At low temperatures, the phase angle of Hns-modified bitumen is lower than that of bitumen, suggesting less temperature susceptibility as a consequence of a cross-linked network formation.
为降低沥青对环境的影响，应提出更具可持续性的粘结剂。本研究着重探讨了碳水化合物生物精炼过程中联产的工业腐殖质如何用作沥青的大分子粘结剂。腐殖质是多相聚呋喃化合物，将其与沥青按50 wt%的比例混合。当使用腐殖质的非水溶性部分（Hns）时，混合后FTIR光谱中未观察到化学结构的变化。DSC研究表明，腐殖质改性沥青中沥青芳香族馏分的结晶温度向高温偏移。热重数据突出显示，沥青中存在腐殖质或Hns会导致200℃以下的质量损失。流变学研究突出了使用腐殖质或Hns与沥青的一些关键优势。在高温下，改性沥青的储能模量增加，且对频率变化的敏感性较低。在低温下，Hns改性沥青的相角低于沥青，这表明由于形成了交联网络，其温度敏感性较低。
