Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Early-strength polycarboxylic water reducer and preparation method thereof
The invention discloses an early-strength polycarboxylic water reducer and a preparation method thereof. The preparation method comprises the following steps: (1) carrying out water-phase oxidation-reduction free radical polymerization reaction on unsaturated acid or derivative monomers thereof and unsaturated polyether macromonomers or unsaturated ester macromonomers under the combined action ofan initiator, a reducing agent and a chain transfer agent to obtain a water reducer prepolymer; and (2) grafting amino-containing metal-organic framework (MOF) nanoparticles into the molecular structure of the water reducer prepolymer, and carrying out an amidation reaction to obtain the early-strength polycarboxylic water reducer. The polycarboxylic water reducer prepared by the method is the early-strength polycarboxylic water reducing agent, the early strength of concrete can be improved on the premise of not influencing high water reduction in the early stage, and the product performance is stable.
本发明公开了一种早强型聚羧酸系减水剂及其制备方法，采用如下步骤制备：(1)将不饱和酸或其衍生物单体、不饱和聚醚大单体或不饱和酯类大单体在引发剂、还原剂和链转移剂共同作用下进行水相氧化‑还原自由基聚合反应得到减水剂预聚产物；(2)将含胺基的金属‑有机框架(MOF)纳米颗粒接枝到减水剂预聚产物的分子结构中，酰胺化反应得到早强型聚羧酸系减水剂。用本发明方法制备的聚羧酸系减水剂是一种早强型聚羧酸系减水剂，初期不影响高减水的前提下又能提高混凝土早期强度，产品性能稳定。
Early-strength polycarboxylic water reducer and preparation method thereof
The invention discloses an early-strength polycarboxylic water reducer and a preparation method thereof. The preparation method comprises the following steps: (1) carrying out water-phase oxidation-reduction free radical polymerization reaction on unsaturated acid or derivative monomers thereof and unsaturated polyether macromonomers or unsaturated ester macromonomers under the combined action ofan initiator, a reducing agent and a chain transfer agent to obtain a water reducer prepolymer; and (2) grafting amino-containing metal-organic framework (MOF) nanoparticles into the molecular structure of the water reducer prepolymer, and carrying out an amidation reaction to obtain the early-strength polycarboxylic water reducer. The polycarboxylic water reducer prepared by the method is the early-strength polycarboxylic water reducing agent, the early strength of concrete can be improved on the premise of not influencing high water reduction in the early stage, and the product performance is stable.
本发明公开了一种早强型聚羧酸系减水剂及其制备方法，采用如下步骤制备：(1)将不饱和酸或其衍生物单体、不饱和聚醚大单体或不饱和酯类大单体在引发剂、还原剂和链转移剂共同作用下进行水相氧化‑还原自由基聚合反应得到减水剂预聚产物；(2)将含胺基的金属‑有机框架(MOF)纳米颗粒接枝到减水剂预聚产物的分子结构中，酰胺化反应得到早强型聚羧酸系减水剂。用本发明方法制备的聚羧酸系减水剂是一种早强型聚羧酸系减水剂，初期不影响高减水的前提下又能提高混凝土早期强度，产品性能稳定。
Early-strength polycarboxylic water reducer and preparation method thereof
一种早强型聚羧酸系减水剂及其制备方法
PENG JINYING (Autor:in) / QIAN SHANSHAN (Autor:in) / ZHENG CHUNYANG (Autor:in) / JIANG HAIDONG (Autor:in) / HUANG CHUNMAN (Autor:in) / LI WEI (Autor:in) / HU YANGCHENG (Autor:in)
20.10.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
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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