A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention relates to the field of water-based functional paints, and provides a self-repairing polymer cement waterproof paint and a preparation method thereof. The waterproof paint is composed ofa liquid material and a powder material. The liquid material contains a self-repairing core-shell capsule. A shell layer of the capsule is resin, and an inner core of the capsule is composed of sodium alginate, polyoxyethylene octadecylamine, super-hydrophobic silica aerogel powder and water. When a coating has fine cracks, the shell layer of the capsule is broken, the sodium alginate is in contact with calcium hydroxide obtained after cement hydration, crosslinking is conducted under the action of Ca<2+>, and a three-dimensional net-shaped object is formed to block the cracks. The super-hydrophobic silicon dioxide aerogel powder is distributed in the network structure of the three-dimensional net-shaped object, so strength is improved, secondary cracking is prevented, and water resistance is improved by utilizing the super-hydrophobicity of the super-hydrophobic silicon dioxide aerogel powder. Therefore, a coating formed by the polymer cement waterproof paint has good self-repairingperformance, secondary cracking of repaired cracks is avoided, and good impermeability is still kept after dry-wet circulation.
本发明涉及水性功能涂料领域，提供了一种自修复聚合物水泥防水涂料及制备方法。所述防水涂料由液料和粉料组成，液料中含有自修复核壳胶囊。胶囊的壳层为树脂，内核由海藻酸钠、聚氧乙烯十八烷基胺、超疏水二氧化硅气凝胶粉末、水组成。当涂层出现细小裂纹时，胶囊的壳层破裂，海藻酸钠与水泥水化后的氢氧化钙接触，在Ca的作用下发生交联，形成三维网状物对裂缝进行封堵。超疏水二氧化硅气凝胶粉末分布于三维网状物的网络结构内部，一方面提高强度，防止二次开裂，另一方面利用其超疏水性提高耐水能力。因此，该聚合物水泥防水涂料形成的涂层具有良好的自修复性能，修复后的裂缝不会出现二次开裂，在干湿循环后仍保持良好的抗渗性能。
The invention relates to the field of water-based functional paints, and provides a self-repairing polymer cement waterproof paint and a preparation method thereof. The waterproof paint is composed ofa liquid material and a powder material. The liquid material contains a self-repairing core-shell capsule. A shell layer of the capsule is resin, and an inner core of the capsule is composed of sodium alginate, polyoxyethylene octadecylamine, super-hydrophobic silica aerogel powder and water. When a coating has fine cracks, the shell layer of the capsule is broken, the sodium alginate is in contact with calcium hydroxide obtained after cement hydration, crosslinking is conducted under the action of Ca<2+>, and a three-dimensional net-shaped object is formed to block the cracks. The super-hydrophobic silicon dioxide aerogel powder is distributed in the network structure of the three-dimensional net-shaped object, so strength is improved, secondary cracking is prevented, and water resistance is improved by utilizing the super-hydrophobicity of the super-hydrophobic silicon dioxide aerogel powder. Therefore, a coating formed by the polymer cement waterproof paint has good self-repairingperformance, secondary cracking of repaired cracks is avoided, and good impermeability is still kept after dry-wet circulation.
本发明涉及水性功能涂料领域，提供了一种自修复聚合物水泥防水涂料及制备方法。所述防水涂料由液料和粉料组成，液料中含有自修复核壳胶囊。胶囊的壳层为树脂，内核由海藻酸钠、聚氧乙烯十八烷基胺、超疏水二氧化硅气凝胶粉末、水组成。当涂层出现细小裂纹时，胶囊的壳层破裂，海藻酸钠与水泥水化后的氢氧化钙接触，在Ca的作用下发生交联，形成三维网状物对裂缝进行封堵。超疏水二氧化硅气凝胶粉末分布于三维网状物的网络结构内部，一方面提高强度，防止二次开裂，另一方面利用其超疏水性提高耐水能力。因此，该聚合物水泥防水涂料形成的涂层具有良好的自修复性能，修复后的裂缝不会出现二次开裂，在干湿循环后仍保持良好的抗渗性能。
Self-repairing polymer cement waterproof paint and preparation method thereof
一种自修复聚合物水泥防水涂料及制备方法
CAI LU (author)
2020-08-25
Patent
Electronic Resource
Chinese
Anti-cracking self-repairing cement-based waterproof material and preparation method thereof
| European Patent Office | 2022
| European Patent Office | 2022