Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
권호 표지
DOI QR코드

DOI QR Code

The Experimental Study on Preparation Characteristics of Self-healing Microcapsules for Mixing Cement Composites Utilizing Liquid Inorganic Materials

액상 무기재료를 활용한 시멘트 복합재료 혼합용 자기치유 마이크로 캡슐의 제조 특성에 관한 실험적 연구

  • Choi, Yun-Wang (Department of Civil Engineering, Semyung University) ;
  • Oh, Sung-Rok (Department of Civil Engineering, Semyung University) ;
  • Kim, Cheol-Gyu (Department of Civil Engineering, Semyung University) ;
  • Lim, Hak-Sang (Department of Biological and Environmental Engineering, Semyung University)
  • 최연왕 (세명대학교 토목공학과) ;
  • 오성록 (세명대학교 건설공학부) ;
  • 김철규 (세명대학교 건설공학부) ;
  • 임학상 (세명대학교 바이오환경공학과)
  • Received : 2018.09.18
  • Accepted : 2018.11.12
  • Published : 2018.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, we tried to fabricate self - healing microcapsules using liquid inorganic materials which can be mixed directly with cement composites. The basic properties of the liquid inorganic material were evaluated and microencapsulation was performed. The focus of this paper is on the quality and manufacturing characteristics of cement composites rather than the healing effects of self - healing microcapsules according to mixed capsules. Test results, the self-healing microcapsules encapsulate liquid inorganic material which is stable at room temperature and has high crack followability, and the yield is over 90%. The size of self - healing microcapsule was able to change according to the synthetic agitation speed and it was able to secure more than 70% of target size. In addition, the loss of less than 10% was found to occur through the membrane strengthening of self - healing microcapsules, and it could be reduced by 50% compared with the case without membrane strengthening.

본 연구에서는 시멘트 복합재료와 직접 혼합 가능한 액상 무기재료 활용 자기치유 마이크로 캡슐을 제조하고자 하였다. 액상 무기재료의 기초특성을 평가하였으며, 마이크로 캡슐화를 수행하였다. 또한 본 논문의 포커스는 자기치유 마이크로 캡슐의 치유 효과보다는 시멘트 복합재료에 적용하기 위한 품질 및 제조 특성에 대하여 검토하였다. 자기치유 마이크로 캡슐은 상온에서 안정하고 균열 추종성이 큰 액상 무기재료를 캡슐화하였으며, 수득률은 90% 이상으로 나타났다. 자기치유 마이크로 캡슐의 크기는 합성 교반 속도에 따라 크기를 변화할 수 있었으며, 목표 크기에 대하여 70% 이상 확보할 수 있었다. 또한 자기치유 마이크로 캡슐의 막강화를 통하여 10% 이내의 손실량이 발생하는 것으로 나타났으며, 막 강화를 하지 않은 것과 비교하여 50% 저감할 수 있었다.

Keywords

GSJHDK_2018_v6n4_236_f0001.png 이미지

Fig. 1. Reaction mechanism of liquid inorganic material

GSJHDK_2018_v6n4_236_f0002.png 이미지

Fig. 2. Manufacture of arbitrary cracked specimen

GSJHDK_2018_v6n4_236_f0003.png 이미지

Fig. 3. Test method of crack followability and curing state

GSJHDK_2018_v6n4_236_f0004.png 이미지

Fig. 4. Encapsulation mechanism

GSJHDK_2018_v6n4_236_f0005.png 이미지

Fig. 5. Encapsulation process

GSJHDK_2018_v6n4_236_f0006.png 이미지

Fig. 6. Encapsulation equipment

GSJHDK_2018_v6n4_236_f0007.png 이미지

Fig. 7. Example of stability evaluation result at ordinary temperature

GSJHDK_2018_v6n4_236_f0008.png 이미지

Fig. 8. Representative forms of gelled materials

GSJHDK_2018_v6n4_236_f0009.png 이미지

Fig. 9. Crack cross-section of TS-1

GSJHDK_2018_v6n4_236_f0010.png 이미지

Fig. 10. Crack cross-section of TS-7

GSJHDK_2018_v6n4_236_f0011.png 이미지

Fig. 11. Size of microcapsules according to RPM of stirrer

GSJHDK_2018_v6n4_236_f0012.png 이미지

Fig. 12. Size distribution curve of microcapsules

GSJHDK_2018_v6n4_236_f0013.png 이미지

Fig. 13. Spectrum analysis

GSJHDK_2018_v6n4_236_f0014.png 이미지

Fig. 14. Form of microcapsule after mixing with cement composite

GSJHDK_2018_v6n4_236_f0015.png 이미지

Fig. 15. Evaluation of dispersibility of microcapsules

Table 1. Composition ratio of liquid inorganic material

GSJHDK_2018_v6n4_236_t0001.png 이미지

Table 2. Mixing ratio of liquid inorganic material

GSJHDK_2018_v6n4_236_t0002.png 이미지

Table 3. Mix ratio

GSJHDK_2018_v6n4_236_t0003.png 이미지

Table 4. Microcapsule loss and residual amount

GSJHDK_2018_v6n4_236_t0004.png 이미지

References

  1. Accukorea Co. Ltd. (2011). Penetraton & Protection Coat Has Water-Proof & Anti-Corrosion Function, When You Apply to the Concrete Construction and That Is Application Method, http://kportal.kipris.or.kr/kportal/search/total_search.do,kr-b1-10-1062734.
  2. An, E.J., Shin, M.S. (2014). "Healing mechanisms and assessment techniques of self-healing concrete," Proceeding of Korea Concrete Institute, 26(2), 477-479 [In Korean].
  3. Blaiszika, B.J., Sottos, N.R., White, S.R. (2007). Nanocapsules for self-healing materials, Journal of Composites Science and Technology, 68(3), 978-986.
  4. Hunger, M., Entrop, A.G., Mandilaras, I., Brouwers, H.J.H., Founti, M. (2009). The behavior of self-compacting concrete containing micro-encapsulated phase change materials, Journal of Cement and Concrete Composites, 31(10), 731-743. https://doi.org/10.1016/j.cemconcomp.2009.08.002
  5. Kim, P.S., Jo, C.K., Ju, T.H., Choi, Y.C., Lee, J.K. (2003). "Preparation and thermal characteristics of microencapsulated pcm for none supercooling phenomenon," Proceeding of the Korean Society oor Energy, 225-228 [In Korean].
  6. Kim, J.Y. (2011). Silicate Production and Uses, Hanrimwon, Seoul.
  7. Kim, J.Y. (2014). Silicate Application and Uses, Hanrimwon, Seoul.
  8. Memon, S.A., Cui, H.Z., Zhang, H., Xing, F. (2014). Utilization of macro encapsulated phase change materials for the development of thermal energy storage and structural lightweight aggregate concrete, Journal of Applied Energy, 139, 43-55.
  9. Na, H.W. (2010). Concrete Penetration Ceramic Waterproof Agent for Concrete Water Proof and Reinforcement, Containing Silicate, Silicon Dioxide, and Silane. http://kportal.kipris.or.kr/kportal/search/total_search.do, kr-b1-10-0975477.
  10. Nesterova, T., Dam-Johansena, K., Pedersen, L.T., Kiil, S. (2012). Microcapsule-based self-healing anticorrosive coatings: capsule size, coating formulation, and exposure testing, Journal of Organic Coatings, 75(4), 309-318. https://doi.org/10.1016/j.porgcoat.2012.08.002
  11. Oh, S.R. (2017). A Study on the Development and Properties of Cementitious Composite Materials Utilizing Capsules for Crack Self-Healing, Ph.D Thesis, Semyung University, Korea [In Korean].
  12. Schlangen, E., Sangadji, S. (2013). Addressing Infrastructure Durability and Sustainability by Self Healing Mechanisms-Recent Advances in Self Healing Concrete and Asphalt, Journal of Procedia Engineering, The 2nd International Conference, 54, 39-57.
  13. Song, Y.K., Jo, Y.H., Lim, Y.J., Cho, S.Y., Yu, H.C., Ryu, B.C., Lee, S.I., Chung, C.M. (2013). Sunlight-induced self-healing of a microcapsule-type protective coating, Journal of Acs Applied Materials and Interfaces, 5(4), 1378-1384. https://doi.org/10.1021/am302728m
  14. Wang, X., Xing, F., Zhang, M., Han, N., Qian, Z. (2003). Experimental study on cementitious composites embedded with organic microcapsules, Journal of Materials, 6(9), 4064-4081.
  15. Yoon, H.W. (2007). Waterproof Agent for Concrete and Waterproofing Method of Concrete Structures Using This, http://kportal.kipris.or.kr/kportal/search/total_search.do, kr-b1-10-0788021.