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A platform for research: civil engineering, architecture and urbanism
Bio-based water reducing agent with claw-type branched structure and preparation method of bio-based water reducing agent
The invention provides a bio-based water reducing agent with a claw type branched structure and a preparation method of the bio-based water reducing agent. The water reducing agent is prepared from the following raw materials in parts by weight: 50 to 150 parts of modified lignin, 60 to 235 parts of ether unsaturated macromonomers, 5 to 20 parts of carboxylic acid unsaturated micromonomers, 3 to 7.5 parts of an initiator, 1 to 3.5 parts of a chain transfer agent, 0.4 to 0.8 part of a reducing agent, 1 to 5 parts of a pH regulator and 200 to 350 parts of deionized water. According to the water reducing agent provided by the invention, a plurality of active functional groups are modified and grafted through a bio-based material, and the modified lignin polycarboxylic acid water reducing agent with a novel claw-type branched structure is prepared from the modified lignin polycarboxylic acid water reducing agent, an ether macromonomer and an acrylic acid micromonomer, so that excellent neat paste flow and relatively low yield stress are realized, a thick adsorption layer is formed on the surface of cement, a steric hindrance effect is provided, and the water reducing agent has a good water reducing effect. The water reducing performance is excellent, and environmental protection is realized.
本发明提供一种爪型支化结构的生物基减水剂及其制备方法，该减水剂包括以下重量份数的原料：改性木质素50～150份、醚类不饱和大单体60～235份、羧酸类不饱和小单体5～20份、引发剂3～7.5份、链转移剂1～3.5份、还原剂0.4～0.8份、pH调节剂1～5份和去离子水200～350份。本发明提供的减水剂通过生物基材质改性，接枝多种活性官能团，并与醚类大单体、丙烯酸类小单体制备新型爪型支化结构的改性木质素聚羧酸减水剂，实现优异的净浆流动和相对低屈服应力，在水泥表面形成厚吸附层，提供空间位阻效应，减水性能出色，绿色环保。
Bio-based water reducing agent with claw-type branched structure and preparation method of bio-based water reducing agent
The invention provides a bio-based water reducing agent with a claw type branched structure and a preparation method of the bio-based water reducing agent. The water reducing agent is prepared from the following raw materials in parts by weight: 50 to 150 parts of modified lignin, 60 to 235 parts of ether unsaturated macromonomers, 5 to 20 parts of carboxylic acid unsaturated micromonomers, 3 to 7.5 parts of an initiator, 1 to 3.5 parts of a chain transfer agent, 0.4 to 0.8 part of a reducing agent, 1 to 5 parts of a pH regulator and 200 to 350 parts of deionized water. According to the water reducing agent provided by the invention, a plurality of active functional groups are modified and grafted through a bio-based material, and the modified lignin polycarboxylic acid water reducing agent with a novel claw-type branched structure is prepared from the modified lignin polycarboxylic acid water reducing agent, an ether macromonomer and an acrylic acid micromonomer, so that excellent neat paste flow and relatively low yield stress are realized, a thick adsorption layer is formed on the surface of cement, a steric hindrance effect is provided, and the water reducing agent has a good water reducing effect. The water reducing performance is excellent, and environmental protection is realized.
本发明提供一种爪型支化结构的生物基减水剂及其制备方法，该减水剂包括以下重量份数的原料：改性木质素50～150份、醚类不饱和大单体60～235份、羧酸类不饱和小单体5～20份、引发剂3～7.5份、链转移剂1～3.5份、还原剂0.4～0.8份、pH调节剂1～5份和去离子水200～350份。本发明提供的减水剂通过生物基材质改性，接枝多种活性官能团，并与醚类大单体、丙烯酸类小单体制备新型爪型支化结构的改性木质素聚羧酸减水剂，实现优异的净浆流动和相对低屈服应力，在水泥表面形成厚吸附层，提供空间位阻效应，减水性能出色，绿色环保。
Bio-based water reducing agent with claw-type branched structure and preparation method of bio-based water reducing agent
一种爪型支化结构的生物基减水剂及其制备方法
LAI WEI (author) / CHEN YUN (author) / WANG JIANJUN (author) / QI YUANJUN (author)
2024-03-12
Patent
Electronic Resource
Chinese
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