Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Sulfonated lignin depolymerization product modified polycarboxylic acid dispersant, and preparation and application thereof
The invention belongs to the technical field of dispersing agents, and relates to a sulfonated lignin depolymerization product modified polycarboxylic acid dispersing agent, preparation and application. The alkali activator and the metal-supported catalyst are used for carrying out a hydrolytic depolymerization reaction on the lignin, the amount of a main active functional group phenolic hydroxyl group of the depolymerized lignin is greatly increased, further modification is facilitated, and the utilization value is increased. The production process of modification is carried out under normal pressure, and the method has the advantages of simple process, high efficiency and excellent cost performance. Propenyl polyoxyethylene ether, hydroxyethyl acrylate and an acrylic monomer participate in copolymerization to form a short-comb-shaped hydrophilic long-chain branch chain, no polymerization inhibitor is added in the reaction process, a phenolic compound in a depolymerized lignin product serves as the polymerization inhibitor, the lignin depolymerized product is grafted and modified, and the obtained product contains sulfonic acid groups, carboxyl groups and ester groups, so that the viscosity of the product is improved. The molecular weight is moderate (5000-30000), effective electrostatic repulsion and steric hindrance effects can be generated on slurry particles, and the dispersing performance is excellent.
本发明属于分散剂技术领域，涉及一种磺化木质素解聚产物改性聚羧酸分散剂、制备和应用。利用碱活化剂、金属负载型催化剂对木质素进行水热解聚反应，解聚后的木质素主活性官能团酚羟基的量大大提高，有利于进一步改性，提高利用价值。改性的生产过程在常压下进行，具有工艺简单、效率高、性能价格比优良的优点。通过丙烯基聚氧乙烯醚、丙烯酸羟乙酯、丙烯酸单体参与共聚后形成短梳状亲水长支链，反应过程不另外加入阻聚剂，利用解聚木质素产物中的酚类化合物充当阻聚剂，接枝改性木质素解聚产物，得到的产品中具有磺酸基、羧基和酯基，分子量适中(5000～30000)，对浆料颗粒能产生有效静电排斥和空间位阻作用，具有优良的分散性能。
Sulfonated lignin depolymerization product modified polycarboxylic acid dispersant, and preparation and application thereof
The invention belongs to the technical field of dispersing agents, and relates to a sulfonated lignin depolymerization product modified polycarboxylic acid dispersing agent, preparation and application. The alkali activator and the metal-supported catalyst are used for carrying out a hydrolytic depolymerization reaction on the lignin, the amount of a main active functional group phenolic hydroxyl group of the depolymerized lignin is greatly increased, further modification is facilitated, and the utilization value is increased. The production process of modification is carried out under normal pressure, and the method has the advantages of simple process, high efficiency and excellent cost performance. Propenyl polyoxyethylene ether, hydroxyethyl acrylate and an acrylic monomer participate in copolymerization to form a short-comb-shaped hydrophilic long-chain branch chain, no polymerization inhibitor is added in the reaction process, a phenolic compound in a depolymerized lignin product serves as the polymerization inhibitor, the lignin depolymerized product is grafted and modified, and the obtained product contains sulfonic acid groups, carboxyl groups and ester groups, so that the viscosity of the product is improved. The molecular weight is moderate (5000-30000), effective electrostatic repulsion and steric hindrance effects can be generated on slurry particles, and the dispersing performance is excellent.
本发明属于分散剂技术领域，涉及一种磺化木质素解聚产物改性聚羧酸分散剂、制备和应用。利用碱活化剂、金属负载型催化剂对木质素进行水热解聚反应，解聚后的木质素主活性官能团酚羟基的量大大提高，有利于进一步改性，提高利用价值。改性的生产过程在常压下进行，具有工艺简单、效率高、性能价格比优良的优点。通过丙烯基聚氧乙烯醚、丙烯酸羟乙酯、丙烯酸单体参与共聚后形成短梳状亲水长支链，反应过程不另外加入阻聚剂，利用解聚木质素产物中的酚类化合物充当阻聚剂，接枝改性木质素解聚产物，得到的产品中具有磺酸基、羧基和酯基，分子量适中(5000～30000)，对浆料颗粒能产生有效静电排斥和空间位阻作用，具有优良的分散性能。
Sulfonated lignin depolymerization product modified polycarboxylic acid dispersant, and preparation and application thereof
磺化木质素解聚产物改性聚羧酸分散剂、制备和应用
LIU MINGHUA (Autor:in) / LIN YUNZHI (Autor:in) / ZENG QIBIN (Autor:in) / LIU YIFAN (Autor:in)
28.05.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
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
/
C04B
Kalk
,
LIME
/
C08H
DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
,
Derivate von natürlichen makromolekularen Verbindungen
/
C09B
Organische Farbstoffe oder eng verwandte Verbindungen zur Herstellung von Farbstoffen
,
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
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