Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Branched-structure graphene oxide-polycarboxylate superplasticizer composite material and preparation method thereof
The invention belongs to the technical field of preparation of water reducing agents for concrete, and discloses a branched-structure graphene oxide-polycarboxylic acid water reducing agent composite material and a preparation method thereof. The preparation method comprises the following steps: carrying out nucleophilic ring opening on an epoxy alcohol monomer, carrying out in-situ polymerization and Michael addition to obtain a sulfydryl-terminated branched polymer, carrying out a free radical polymerization reaction on the sulfydryl-terminated branched polymer and a polycarboxylic acid water reducer under the action of an initiator to generate a polycarboxylic acid water reducer polymer with a branched structure, and carrying out ring opening grafting on sulfydryl of the polymer and an epoxy group on graphene oxide to obtain the polycarboxylic acid water reducer polymer with the branched structure. The graphene oxide polycarboxylate superplasticizer is obtained. The compound designed and synthesized by the invention has a polycarboxylic acid molecular chain, can play a role of a water reducing agent while reinforcing and toughening a cement-based material by graphene oxide, and improves the workability of cement paste. The compound can solve the problem that graphene oxide and cement paste are difficult to mix, effectively improves the fluidity and compressive strength of a cement-based material, and has a wide application prospect.
本发明属于混凝土用减水剂的制备技术领域，本发明公开了一种支化结构氧化石墨烯‑聚羧酸减水剂复合材料及其制备方法。本发明通过环氧醇类单体亲核开环再进行原位聚合和迈克尔加成，得到巯基封端支化聚合物，在引发剂作用下，与聚羧酸减水剂发生自由基聚合反应，生成支化结构的聚羧酸减水剂聚合物，该聚合物的巯基与氧化石墨烯上环氧基开环接枝，得到氧化石墨烯聚羧酸减水剂。本发明设计合成的复合物具有聚羧酸分子链，可以在氧化石墨烯增强增韧水泥基材料的同时，发挥减水剂的作用，提高水泥浆体的工作性。该复合物可以解决氧化石墨烯与水泥浆体难以拌合的问题，有效提高水泥基材料的流动度和抗压强度，具有广阔的应用前景。
Branched-structure graphene oxide-polycarboxylate superplasticizer composite material and preparation method thereof
The invention belongs to the technical field of preparation of water reducing agents for concrete, and discloses a branched-structure graphene oxide-polycarboxylic acid water reducing agent composite material and a preparation method thereof. The preparation method comprises the following steps: carrying out nucleophilic ring opening on an epoxy alcohol monomer, carrying out in-situ polymerization and Michael addition to obtain a sulfydryl-terminated branched polymer, carrying out a free radical polymerization reaction on the sulfydryl-terminated branched polymer and a polycarboxylic acid water reducer under the action of an initiator to generate a polycarboxylic acid water reducer polymer with a branched structure, and carrying out ring opening grafting on sulfydryl of the polymer and an epoxy group on graphene oxide to obtain the polycarboxylic acid water reducer polymer with the branched structure. The graphene oxide polycarboxylate superplasticizer is obtained. The compound designed and synthesized by the invention has a polycarboxylic acid molecular chain, can play a role of a water reducing agent while reinforcing and toughening a cement-based material by graphene oxide, and improves the workability of cement paste. The compound can solve the problem that graphene oxide and cement paste are difficult to mix, effectively improves the fluidity and compressive strength of a cement-based material, and has a wide application prospect.
本发明属于混凝土用减水剂的制备技术领域，本发明公开了一种支化结构氧化石墨烯‑聚羧酸减水剂复合材料及其制备方法。本发明通过环氧醇类单体亲核开环再进行原位聚合和迈克尔加成，得到巯基封端支化聚合物，在引发剂作用下，与聚羧酸减水剂发生自由基聚合反应，生成支化结构的聚羧酸减水剂聚合物，该聚合物的巯基与氧化石墨烯上环氧基开环接枝，得到氧化石墨烯聚羧酸减水剂。本发明设计合成的复合物具有聚羧酸分子链，可以在氧化石墨烯增强增韧水泥基材料的同时，发挥减水剂的作用，提高水泥浆体的工作性。该复合物可以解决氧化石墨烯与水泥浆体难以拌合的问题，有效提高水泥基材料的流动度和抗压强度，具有广阔的应用前景。
Branched-structure graphene oxide-polycarboxylate superplasticizer composite material and preparation method thereof
一种支化结构氧化石墨烯-聚羧酸减水剂复合材料及其制备方法
LIU XIAO (Autor:in) / ZHOU BINGJIE (Autor:in) / LIU SHUANG (Autor:in) / XU FANDING (Autor:in) / LI WENXIU (Autor:in) / ZHENG FUYING (Autor:in) / WU HAO (Autor:in) / LI YUYANG (Autor:in) / HAN KANG (Autor:in) / ZHANG PENGYU (Autor:in)
08.03.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
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
/
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
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