Synthesis of Long Alkyl and Fluoroalkyl Substituted Siloxane Copolymers for the Water Repellency of Rammed Earth Walls
Rammed earth in a built environment has vapor diffusion characteristics and humidity control abilities, each of which is respectively attributed to the porous structures and the hydrophilic properties. Indeed, these structures and properties allow for the easy absorbance of water particles, hence af...
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MDPI AG
2023-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/17/1/216 |
| _version_ | 1797358473608953856 |
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| author | Keun-Byoung Yoon Mu-Jin Kim Dong-Eun Lee Hee-Seon Kim |
| author_facet | Keun-Byoung Yoon Mu-Jin Kim Dong-Eun Lee Hee-Seon Kim |
| author_sort | Keun-Byoung Yoon |
| collection | DOAJ |
| description | Rammed earth in a built environment has vapor diffusion characteristics and humidity control abilities, each of which is respectively attributed to the porous structures and the hydrophilic properties. Indeed, these structures and properties allow for the easy absorbance of water particles, hence affecting the durability of a rammed earth wall. This paper presents the water-repellency method for rammed earth walls, which utilizes siloxane copolymers containing fluorine. The water-repellent properties are investigated by measuring the contact angle, water absorption rate, and compressive strength after spray-coating with the synthesized siloxane copolymers on the surface of the rammed earth specimens under study. The water contact angle of the specimen, coated with a siloxane copolymer containing 10 mol.% of a silane monomer with a fluorine group, is about 140°. The water absorption of the specimen obtained after immersing in water for 24 h is low, at about 3.5 wt.%. In addition, the compressive strength remains more than 80% of the corresponding strength of the specimen which is not immersed in water. It is confirmed that the use of a 10% by volume of the siloxane copolymer containing the fluorine group may enhance the water-repellent performance and economic competitiveness. |
| first_indexed | 2024-03-08T15:02:32Z |
| format | Article |
| id | doaj.art-86d00f703967455982b3574b19659ad0 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-08T15:02:32Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-86d00f703967455982b3574b19659ad02024-01-10T15:03:01ZengMDPI AGMaterials1996-19442023-12-0117121610.3390/ma17010216Synthesis of Long Alkyl and Fluoroalkyl Substituted Siloxane Copolymers for the Water Repellency of Rammed Earth WallsKeun-Byoung Yoon0Mu-Jin Kim1Dong-Eun Lee2Hee-Seon Kim3Department of Polymer Science and Engineering, Kyungpook National University, Daegu 41566, Republic of KoreaDepartment of Polymer Science and Engineering, Kyungpook National University, Daegu 41566, Republic of KoreaSchool of Architecture, Civil, Environment and Energy Engineering, Kyungpook National University, Daegu 41566, Republic of KoreaCorporate R&D Center, ICAS Co., Ltd., Daegu 41566, Republic of KoreaRammed earth in a built environment has vapor diffusion characteristics and humidity control abilities, each of which is respectively attributed to the porous structures and the hydrophilic properties. Indeed, these structures and properties allow for the easy absorbance of water particles, hence affecting the durability of a rammed earth wall. This paper presents the water-repellency method for rammed earth walls, which utilizes siloxane copolymers containing fluorine. The water-repellent properties are investigated by measuring the contact angle, water absorption rate, and compressive strength after spray-coating with the synthesized siloxane copolymers on the surface of the rammed earth specimens under study. The water contact angle of the specimen, coated with a siloxane copolymer containing 10 mol.% of a silane monomer with a fluorine group, is about 140°. The water absorption of the specimen obtained after immersing in water for 24 h is low, at about 3.5 wt.%. In addition, the compressive strength remains more than 80% of the corresponding strength of the specimen which is not immersed in water. It is confirmed that the use of a 10% by volume of the siloxane copolymer containing the fluorine group may enhance the water-repellent performance and economic competitiveness.https://www.mdpi.com/1996-1944/17/1/216water repellencysiloxane copolymerrammed earth wall |
| spellingShingle | Keun-Byoung Yoon Mu-Jin Kim Dong-Eun Lee Hee-Seon Kim Synthesis of Long Alkyl and Fluoroalkyl Substituted Siloxane Copolymers for the Water Repellency of Rammed Earth Walls Materials water repellency siloxane copolymer rammed earth wall |
| title | Synthesis of Long Alkyl and Fluoroalkyl Substituted Siloxane Copolymers for the Water Repellency of Rammed Earth Walls |
| title_full | Synthesis of Long Alkyl and Fluoroalkyl Substituted Siloxane Copolymers for the Water Repellency of Rammed Earth Walls |
| title_fullStr | Synthesis of Long Alkyl and Fluoroalkyl Substituted Siloxane Copolymers for the Water Repellency of Rammed Earth Walls |
| title_full_unstemmed | Synthesis of Long Alkyl and Fluoroalkyl Substituted Siloxane Copolymers for the Water Repellency of Rammed Earth Walls |
| title_short | Synthesis of Long Alkyl and Fluoroalkyl Substituted Siloxane Copolymers for the Water Repellency of Rammed Earth Walls |
| title_sort | synthesis of long alkyl and fluoroalkyl substituted siloxane copolymers for the water repellency of rammed earth walls |
| topic | water repellency siloxane copolymer rammed earth wall |
| url | https://www.mdpi.com/1996-1944/17/1/216 |
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