Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention relates to the field of preparation of building materials, in particular to a preparation method of a starch-based environment-friendly water reducing agent. According to the invention,a modified starch copolymer prepared by acidolysis of a natural polymer material starch and copolymerization modification with a sulfonated grafted monomer sodium methallyl sulfonate is used as a mainmaterial, and the water reducing agent prepared by blending reaction with substances such as a beta-naphthalene sulfonate formaldehyde condensate and the like has excellent dispersity in concrete; agood water reducing effect is achieved, and the concrete setting time can be effectively delayed; through acidolysis modification of the starch, the molecular weight of the starch can be reduced, morehydroxyl groups are exposed, sulfonic acid groups are favorably grafted and introduced, the dispersity and the water reducing property of the material are improved, and the water reducing agent is anovel starch-based water reducing agent which is environment-friendly and does not have a corrosion effect on reinforcing steel bars.
本发明涉及建筑材料制备领域，具体关于一种淀粉基环保减水剂的制备方法；本发明以用天然高分子材料淀粉经过酸解和与磺化接枝单体甲基丙烯磺酸钠共聚改性，制备的一种改性淀粉共聚物为主要材料，通过与β‑萘磺酸盐甲醛缩合物等物质的共混反应制备的减水剂在混凝土中具有优异的分散性，具有很好的减水效果，能有效延缓混凝土凝结时间；通过对淀粉的酸解改性，能够使淀粉分子量降低，暴露更多羟基，有利于接枝引入磺酸基团，增加材料的分散性和减水性，本发明的减水剂是绿色环保，对钢筋无腐蚀作用的新型淀粉基减水剂。
The invention relates to the field of preparation of building materials, in particular to a preparation method of a starch-based environment-friendly water reducing agent. According to the invention,a modified starch copolymer prepared by acidolysis of a natural polymer material starch and copolymerization modification with a sulfonated grafted monomer sodium methallyl sulfonate is used as a mainmaterial, and the water reducing agent prepared by blending reaction with substances such as a beta-naphthalene sulfonate formaldehyde condensate and the like has excellent dispersity in concrete; agood water reducing effect is achieved, and the concrete setting time can be effectively delayed; through acidolysis modification of the starch, the molecular weight of the starch can be reduced, morehydroxyl groups are exposed, sulfonic acid groups are favorably grafted and introduced, the dispersity and the water reducing property of the material are improved, and the water reducing agent is anovel starch-based water reducing agent which is environment-friendly and does not have a corrosion effect on reinforcing steel bars.
本发明涉及建筑材料制备领域，具体关于一种淀粉基环保减水剂的制备方法；本发明以用天然高分子材料淀粉经过酸解和与磺化接枝单体甲基丙烯磺酸钠共聚改性，制备的一种改性淀粉共聚物为主要材料，通过与β‑萘磺酸盐甲醛缩合物等物质的共混反应制备的减水剂在混凝土中具有优异的分散性，具有很好的减水效果，能有效延缓混凝土凝结时间；通过对淀粉的酸解改性，能够使淀粉分子量降低，暴露更多羟基，有利于接枝引入磺酸基团，增加材料的分散性和减水性，本发明的减水剂是绿色环保，对钢筋无腐蚀作用的新型淀粉基减水剂。
Preparation method of starch-based environment-friendly water reducing agent
一种淀粉基环保减水剂的制备方法
04.12.2020
Patent
Elektronische Ressource
Chinesisch
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