Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Modified straw pulp alkali lignin grafted high-performance water reducing agent and preparation method thereof
The invention discloses a modified straw pulp alkali lignin grafted high-performance water reducing agent and a preparation method thereof, relates to the technical field of concrete admixtures, and aims to solve the technical problems that formaldehyde residues exist in the preparation process of an existing water reducing agent, environmental pollution is caused, human health is seriously threatened, and the preparation cost is high. The preparation method of the modified straw pulp alkali lignin grafted high-performance water reducing agent comprises the following steps: mixing a naphthalene polycondensate and modified straw pulp alkali lignin, reacting at 85-95 DEG C for 2-4 hours to obtain a polymer, controlling the pH value of the polymer to be 6-7, adding sulfite into the polymer while stirring to generate a precipitate in the polymer, and removing the precipitate to obtain the modified straw pulp alkali lignin grafted high-performance water reducing agent. And drying the polymer to obtain the high-performance water reducing agent. The high-performance water reducing agent is prepared by the technical scheme. The modified straw pulp alkali lignin grafted high-performance water reducing agent and the preparation method thereof provided by the invention are used for preparing the water reducing agent.
本发明公开了一种改性草浆碱木质素接枝高性能减水剂及其制备方法，涉及混凝土外加剂技术领域，以解决现有减水剂制备过程中存在甲醛残留，造成环境污染和严重威胁人类健康，以及制备成本高的技术问题。所述改性草浆碱木质素接枝高性能减水剂的制备方法，包括：将萘系缩聚物和改性草浆碱木质素混合后，在温度为85～95℃条件下反应2～4h，得到聚合物，控制所述聚合物的pH为6～7，并在所述聚合物中边搅拌边加入亚硫酸盐，使聚合物中生成沉淀，去除沉淀后，将所述聚合物干燥得到所述高性能减水剂。所述高性能减水剂通过上述技术方案制备得到。本发明提供的改性草浆碱木质素接枝高性能减水剂及其制备方法用于制备减水剂。
Modified straw pulp alkali lignin grafted high-performance water reducing agent and preparation method thereof
The invention discloses a modified straw pulp alkali lignin grafted high-performance water reducing agent and a preparation method thereof, relates to the technical field of concrete admixtures, and aims to solve the technical problems that formaldehyde residues exist in the preparation process of an existing water reducing agent, environmental pollution is caused, human health is seriously threatened, and the preparation cost is high. The preparation method of the modified straw pulp alkali lignin grafted high-performance water reducing agent comprises the following steps: mixing a naphthalene polycondensate and modified straw pulp alkali lignin, reacting at 85-95 DEG C for 2-4 hours to obtain a polymer, controlling the pH value of the polymer to be 6-7, adding sulfite into the polymer while stirring to generate a precipitate in the polymer, and removing the precipitate to obtain the modified straw pulp alkali lignin grafted high-performance water reducing agent. And drying the polymer to obtain the high-performance water reducing agent. The high-performance water reducing agent is prepared by the technical scheme. The modified straw pulp alkali lignin grafted high-performance water reducing agent and the preparation method thereof provided by the invention are used for preparing the water reducing agent.
本发明公开了一种改性草浆碱木质素接枝高性能减水剂及其制备方法，涉及混凝土外加剂技术领域，以解决现有减水剂制备过程中存在甲醛残留，造成环境污染和严重威胁人类健康，以及制备成本高的技术问题。所述改性草浆碱木质素接枝高性能减水剂的制备方法，包括：将萘系缩聚物和改性草浆碱木质素混合后，在温度为85～95℃条件下反应2～4h，得到聚合物，控制所述聚合物的pH为6～7，并在所述聚合物中边搅拌边加入亚硫酸盐，使聚合物中生成沉淀，去除沉淀后，将所述聚合物干燥得到所述高性能减水剂。所述高性能减水剂通过上述技术方案制备得到。本发明提供的改性草浆碱木质素接枝高性能减水剂及其制备方法用于制备减水剂。
Modified straw pulp alkali lignin grafted high-performance water reducing agent and preparation method thereof
一种改性草浆碱木质素接枝高性能减水剂及其制备方法
PENG ZEBING (Autor:in) / TANG ZUJING (Autor:in) / BAI JIE (Autor:in) / XUE TONG (Autor:in)
27.09.2024
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
/
C08H
DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
,
Derivate von natürlichen makromolekularen Verbindungen
Alkali-free water reducing agent and preparation method thereof
| Europäisches Patentamt | 2020
Sodium lignin sulfonate water reducing agent and preparation method thereof
| Europäisches Patentamt | 2020
| Europäisches Patentamt | 2021
Preparation method of lignosulfonate high-performance modified water reducing agent
| Europäisches Patentamt | 2021
| Europäisches Patentamt | 2020