화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.64, 284-291, August, 2018
DOI10.1016/j.jiec.2018.03.026  Export Citation
Rheological analysis of self-healing property of microcapsule-containing asphalt
Kyungho Chung, Seunghyun Lee1, Wooksang Cho2, Junyoung Seo, and Youngkeun Hong†
  • Department of Polymer Engineering, The University of Suwon, Hawseong-si, Gyeonggi-do 18323, Republic of Korea
  • 1Department of Nanochemistry, Gachon University, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
  • 2Department of Environment and Energy Engineering, The University of Suwon, Republic of Korea
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Novel anionic urethane ionomers were synthesized, encapsulated, and added to asphalt. Accordingly, microcapsule-containing asphalts displayed better rheological properties than the pure one. Shear strength, G* (complex shear modulus) exhibited microcapsule-containing asphalts improved over rest period, it reached 98% of its original strength at 24-h rest time after break as compared to only 74% for pure asphalt. Therefore, microcapsule (core: anionic urethane ionomer)-containing asphalts possess excellent self-healing potential. The anionic urethane solution remained in the core of the microcapsule after break, It represented the core solution and microcapsule itself endured the harsh condition of mixing. In a comparative study, polymer (anionic urethane ionomer)-added asphalt showed better modification effect than microcapsule (core: anionic urethane ionomer)-containing asphalt. However, from the view of self-healing properties, microcapsule-containing asphalt showed better healing effect, which may be attributed to the ionic bonding among anionic urethane ionomers. The polymer solution with high intermolecular force, filled the crack of the asphalt and pulls the opposite ends together; hence, the original properties were restored.
Keywords:Anionic urethane ionomer;Microcapsule;Self-healing asphalt;Shear strength
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