Preparation and Characterization of Electromagnetic-Induced Rupture Microcapsules for Self-Repairing Mortars
Cement-based materials are susceptible to internal cracks during service, leading to a reduction in their durability. Microcapsules can effectively self-repair cracks in cement-based materials. In this study, novel electromagnetic-induced rupture microcapsules (DWMs) were prepared by using the melt...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-05-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/10/3608 |
| _version_ | 1797498226731909120 |
|---|---|
| author | Erwang Li Wei Du Ronghua Zhuang Mingfang Ba Lianwang Yuan Qian Zhang Yuepin Zhang |
| author_facet | Erwang Li Wei Du Ronghua Zhuang Mingfang Ba Lianwang Yuan Qian Zhang Yuepin Zhang |
| author_sort | Erwang Li |
| collection | DOAJ |
| description | Cement-based materials are susceptible to internal cracks during service, leading to a reduction in their durability. Microcapsules can effectively self-repair cracks in cement-based materials. In this study, novel electromagnetic-induced rupture microcapsules (DWMs) were prepared by using the melt dispersion method with Fe<sub>3</sub>O<sub>4</sub> nano-particles/polyethylene wax as the shell and epoxy resin as the repairing agent. The core fraction, compactness, particle size distribution, morphology, and chemical structure of DWMs were characterized. DWMs were subsequently incorporated into the mortar to measure the pore size distribution, compressive strength recovery, and maximum amplitudes of the pre-damaged mortar after self-repairing. DWMs were also evaluated for their ability to self-repair cracks on mortar surfaces. The results showed that the core fraction, remaining weight (30 days), and mean size of DWMs were 72.5%, 97.6 g, and 220 μm, respectively. SEM showed that the DWMs were regular spherical with a rough surface and could form a good bond with cement matrix. FTIR indicated that the epoxy resin was successfully encapsulated in the Fe<sub>3</sub>O<sub>4</sub> nano-particles/polyethylene wax. After 15 days of self-repairing, the harmful pore ratio, compressive strength recovery, and maximum amplitude of the pre-damaged mortars were 48.97%, 91.9%, and 24.03 mV, respectively. The mortar with an initial crack width of 0.4–0.5 mm was self-repaired within 7 days. This indicated that the incorporation of DWMs can improve the self-repair ability of the mortar. This work is expected to provide new insights to address the mechanism of microcapsule rupture in self-repairing cement-based materials. |
| first_indexed | 2024-03-10T03:31:24Z |
| format | Article |
| id | doaj.art-f81599925b11485ebdd34cbeb7b0fa51 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T03:31:24Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-f81599925b11485ebdd34cbeb7b0fa512023-11-23T11:57:53ZengMDPI AGMaterials1996-19442022-05-011510360810.3390/ma15103608Preparation and Characterization of Electromagnetic-Induced Rupture Microcapsules for Self-Repairing MortarsErwang Li0Wei Du1Ronghua Zhuang2Mingfang Ba3Lianwang Yuan4Qian Zhang5Yuepin Zhang6School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, ChinaSchool of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, ChinaState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, ChinaSchool of Civil and Environmental Engineering, Ningbo University, Ningbo 315211, ChinaShandong Provincal Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, ChinaShandong Provincal Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, ChinaSchool of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, ChinaCement-based materials are susceptible to internal cracks during service, leading to a reduction in their durability. Microcapsules can effectively self-repair cracks in cement-based materials. In this study, novel electromagnetic-induced rupture microcapsules (DWMs) were prepared by using the melt dispersion method with Fe<sub>3</sub>O<sub>4</sub> nano-particles/polyethylene wax as the shell and epoxy resin as the repairing agent. The core fraction, compactness, particle size distribution, morphology, and chemical structure of DWMs were characterized. DWMs were subsequently incorporated into the mortar to measure the pore size distribution, compressive strength recovery, and maximum amplitudes of the pre-damaged mortar after self-repairing. DWMs were also evaluated for their ability to self-repair cracks on mortar surfaces. The results showed that the core fraction, remaining weight (30 days), and mean size of DWMs were 72.5%, 97.6 g, and 220 μm, respectively. SEM showed that the DWMs were regular spherical with a rough surface and could form a good bond with cement matrix. FTIR indicated that the epoxy resin was successfully encapsulated in the Fe<sub>3</sub>O<sub>4</sub> nano-particles/polyethylene wax. After 15 days of self-repairing, the harmful pore ratio, compressive strength recovery, and maximum amplitude of the pre-damaged mortars were 48.97%, 91.9%, and 24.03 mV, respectively. The mortar with an initial crack width of 0.4–0.5 mm was self-repaired within 7 days. This indicated that the incorporation of DWMs can improve the self-repair ability of the mortar. This work is expected to provide new insights to address the mechanism of microcapsule rupture in self-repairing cement-based materials.https://www.mdpi.com/1996-1944/15/10/3608self-repairingelectromagnetic-induced rupture microcapsulesFe<sub>3</sub>O<sub>4</sub> nano-particlescracksultrasonic testing |
| spellingShingle | Erwang Li Wei Du Ronghua Zhuang Mingfang Ba Lianwang Yuan Qian Zhang Yuepin Zhang Preparation and Characterization of Electromagnetic-Induced Rupture Microcapsules for Self-Repairing Mortars Materials self-repairing electromagnetic-induced rupture microcapsules Fe<sub>3</sub>O<sub>4</sub> nano-particles cracks ultrasonic testing |
| title | Preparation and Characterization of Electromagnetic-Induced Rupture Microcapsules for Self-Repairing Mortars |
| title_full | Preparation and Characterization of Electromagnetic-Induced Rupture Microcapsules for Self-Repairing Mortars |
| title_fullStr | Preparation and Characterization of Electromagnetic-Induced Rupture Microcapsules for Self-Repairing Mortars |
| title_full_unstemmed | Preparation and Characterization of Electromagnetic-Induced Rupture Microcapsules for Self-Repairing Mortars |
| title_short | Preparation and Characterization of Electromagnetic-Induced Rupture Microcapsules for Self-Repairing Mortars |
| title_sort | preparation and characterization of electromagnetic induced rupture microcapsules for self repairing mortars |
| topic | self-repairing electromagnetic-induced rupture microcapsules Fe<sub>3</sub>O<sub>4</sub> nano-particles cracks ultrasonic testing |
| url | https://www.mdpi.com/1996-1944/15/10/3608 |
| work_keys_str_mv | AT erwangli preparationandcharacterizationofelectromagneticinducedrupturemicrocapsulesforselfrepairingmortars AT weidu preparationandcharacterizationofelectromagneticinducedrupturemicrocapsulesforselfrepairingmortars AT ronghuazhuang preparationandcharacterizationofelectromagneticinducedrupturemicrocapsulesforselfrepairingmortars AT mingfangba preparationandcharacterizationofelectromagneticinducedrupturemicrocapsulesforselfrepairingmortars AT lianwangyuan preparationandcharacterizationofelectromagneticinducedrupturemicrocapsulesforselfrepairingmortars AT qianzhang preparationandcharacterizationofelectromagneticinducedrupturemicrocapsulesforselfrepairingmortars AT yuepinzhang preparationandcharacterizationofelectromagneticinducedrupturemicrocapsulesforselfrepairingmortars |