@Article{CL.2024.2110.785,
AUTHOR = {Y. L. Hou, L. Z Bai},
TITLE = {Development of SBS composite modified asphalt incorporating polydopamine-enhanced MoS<sub>2</sub>},
JOURNAL = {Chalcogenide Letters},
VOLUME = {21},
YEAR = {2024},
NUMBER = {10},
PAGES = {785--796},
URL = {http://www.techscience.com/CL/v21n10/64926},
ISSN = {1584-8663},
ABSTRACT = {This study investigated the development of a novel composite modified asphalt 
incorporating PDA-MoS<sub>2</sub> into styrene-butadiene-styrene (SBS) modified asphalt. The 
successful synthesis of PDA-MoS<sub>2</sub> was confirmed through various characterization 
techniques. The incorporation of PDA-MoS<sub>2</sub> into SBS modified asphalt resulted in 
significant improvements in performance properties. With a PDA-MoS<sub>2</sub> content of 0.7 wt%, 
the modified asphalt showed a notable 15.1% rise in softening point and a 24% drop in 
penetration in comparison to the control SBS modified asphalt. Dynamic Shear Rheometer 
tests revealed a 2.4-fold increase in the rutting factor at 60°C. Multiple Stress Creep 
Recovery tests demonstrated enhanced rutting resistance, with a 72.2% reduction in nonrecoverable
 creep compliance at 0.1 kPa stress level. Electrochemical measurements 
showed improved corrosion resistance, evidenced by lower current densities and higher 
charge transfer resistance. Microstructural analysis revealed well-dispersed PDA-MoS<sub>2</sub> 
particles forming a compact network structure within the asphalt matrix. The hydrophilicity 
of the modified asphalt increased, with a 35.3% decrease in water contact angle. The 
synergistic effect between PDA-MoS<sub>2</sub>, SBS, and asphalt components, facilitated by 
enhanced interfacial interactions and chemical bonding, contributed to the observed 
performance improvements. The results indicate that PDA-MoS<sub>2</sub> has the potential to 
improve the characteristics of SBS modified asphalt as a modifier. },
DOI = {10.15251/CL.2024.2110.785}
}