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A platform for research: civil engineering, architecture and urbanism
Microcapsule slow-release water reducing agent and preparation method thereof
The invention discloses a microcapsule slow-release type water reducing agent which is prepared by the following steps: by taking isopentenyl polyglycol ether as a polyether monomer and acrylic acid and hydroxyethyl acrylate as functional monomers, introducing-COOR (ester group) into the structure of the water reducing agent, reducing the content of-COOH, hydrolyzing and breaking the-COOR group into-COO-in an alkaline environment, complexing with Ca < 2 + > on the surface of a cement particle, and then adding a water reducing agent, thereby obtaining the microcapsule slow-release type water reducing agent. The effect of slowly releasing-COO <-> is achieved; gelatin, Arabic gum and deionized water are heated and stirred to prepare a capsule wall solution, the capsule wall solution is mixed with the slow-release water reducing agent, then transglutaminase is added, and the gelatin and the Arabic gum are mutually crosslinked under the action of the transglutaminase, so that gel is separated out and wraps the slow-release water reducing agent, and the microcapsule slow-release water reducing agent is obtained. When in use, the wall of the microcapsule is gradually loosened and broken, so that the water reducing agent is slowly released, and a dual slow release effect is realized. The preparation method provided by the invention has the advantages of simple operation and mild process parameters, and is suitable for industrial production.
本发明公开了一种微胶囊缓释型减水剂，以异戊烯基聚乙二醇醚为聚醚单体，丙烯酸、丙烯酸羟乙酯为功能单体，向减水剂结构中引入‑COOR(酯基)，减少‑COOH的含量，‑COOR基团在碱性环境下先水解，断裂成为‑COO－后，再与水泥颗粒表面的Ca2+络合，以达到缓释‑COO－效果；通过明胶、阿拉伯胶与去离子水加热搅拌制得囊壁溶液，与缓释型减水剂混合，再加入转谷氨酰胺酶，明胶与阿拉伯胶在转谷氨酰胺酶作用下，相互交联，从而析出凝胶，将缓释型减水剂包裹起来，即得微胶囊缓释型减水剂。使用时，微胶囊囊壁逐渐疏松破裂，使得减水剂缓慢释放，实现“双重缓释”效果。以此有效降低混凝土坍落度损失，本发明提供的制备方法具有操作简单、工艺参数温和，适于工业化生产。
Microcapsule slow-release water reducing agent and preparation method thereof
The invention discloses a microcapsule slow-release type water reducing agent which is prepared by the following steps: by taking isopentenyl polyglycol ether as a polyether monomer and acrylic acid and hydroxyethyl acrylate as functional monomers, introducing-COOR (ester group) into the structure of the water reducing agent, reducing the content of-COOH, hydrolyzing and breaking the-COOR group into-COO-in an alkaline environment, complexing with Ca < 2 + > on the surface of a cement particle, and then adding a water reducing agent, thereby obtaining the microcapsule slow-release type water reducing agent. The effect of slowly releasing-COO <-> is achieved; gelatin, Arabic gum and deionized water are heated and stirred to prepare a capsule wall solution, the capsule wall solution is mixed with the slow-release water reducing agent, then transglutaminase is added, and the gelatin and the Arabic gum are mutually crosslinked under the action of the transglutaminase, so that gel is separated out and wraps the slow-release water reducing agent, and the microcapsule slow-release water reducing agent is obtained. When in use, the wall of the microcapsule is gradually loosened and broken, so that the water reducing agent is slowly released, and a dual slow release effect is realized. The preparation method provided by the invention has the advantages of simple operation and mild process parameters, and is suitable for industrial production.
本发明公开了一种微胶囊缓释型减水剂，以异戊烯基聚乙二醇醚为聚醚单体，丙烯酸、丙烯酸羟乙酯为功能单体，向减水剂结构中引入‑COOR(酯基)，减少‑COOH的含量，‑COOR基团在碱性环境下先水解，断裂成为‑COO－后，再与水泥颗粒表面的Ca2+络合，以达到缓释‑COO－效果；通过明胶、阿拉伯胶与去离子水加热搅拌制得囊壁溶液，与缓释型减水剂混合，再加入转谷氨酰胺酶，明胶与阿拉伯胶在转谷氨酰胺酶作用下，相互交联，从而析出凝胶，将缓释型减水剂包裹起来，即得微胶囊缓释型减水剂。使用时，微胶囊囊壁逐渐疏松破裂，使得减水剂缓慢释放，实现“双重缓释”效果。以此有效降低混凝土坍落度损失，本发明提供的制备方法具有操作简单、工艺参数温和，适于工业化生产。
Microcapsule slow-release water reducing agent and preparation method thereof
一种微胶囊缓释型减水剂及其制备方法
ZHANG YAN (author) / TAN HONGBO (author) / XIAO YUNYING (author) / WU YUBIN (author) / WANG FEI (author) / YAN RONGHUA (author) / SUN GUOZHONG (author) / DONG HUAZHONG (author) / YAO CHAO (author)
2025-01-14
Patent
Electronic Resource
Chinese
IPC:
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
C04B
Kalk
,
LIME
/
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
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