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Method for catalytically synthesizing polycarboxylate superplasticizer by using acrylic fiber immobilized manganese oxide
The invention relates to a method for catalytically synthesizing a polycarboxylic acid water reducing agent by using acrylic fiber immobilized manganese oxide, and belongs to the technical field of water reducing agent preparation. The method is characterized by mainly comprising the following steps. The preparation method comprises the following steps: 1, preparation of a catalyst: performing carboxymethylation on ethylenediamine functionalized acrylic fibers, complexing manganese ions, and oxidizing with a potassium permanganate solution to obtain the acrylic fiber immobilized manganese oxide catalyst; and 2, catalytic synthesis of the polycarboxylate superplasticizer: polymerizing the macromonomer diethylene glycol monovinyl ether and the micromonomer acrylic acid to prepare the polycarboxylate superplasticizer. Manganese oxide has a certain promotion effect on generation of active free radicals and monomer polymerization, so that the molecular weight and distribution of the water reducing agent and the monomer conversion rate can be improved. In addition, the acrylic fiber immobilized manganese oxide improves the recovery rate of the powdered manganese oxide, the recovery steps are simplified, and the fibrous catalyst can be woven into various required shapes, so that the method has better industrial application value.
本发明涉及一种腈纶固载氧化锰催化合成聚羧酸减水剂的方法，属于减水剂制备技术领域。其特征主要包括如下步骤。一、催化剂的制备：将乙二胺功能化腈纶纤维进行羧甲基化，络合锰离子后用高锰酸钾溶液进行氧化，从而得到腈纶纤维固载氧化锰催化剂。二、催化合成聚羧酸减水剂：利用大单体二乙二醇单乙烯基醚与小单体丙烯酸聚合，从而制得聚羧酸减水剂。本发明中氧化锰对活性自由基的生成和单体聚合都有一定的促进作用，从而可以提减水剂高的分子量及其分布和的单体转化率。另外，腈纶纤维固载氧化锰提高了粉末氧化锰的回收率，简化了回收步骤，而且，纤维状催化剂可以编制成多种所需形状，具有较好的工业应用价值。
Method for catalytically synthesizing polycarboxylate superplasticizer by using acrylic fiber immobilized manganese oxide
The invention relates to a method for catalytically synthesizing a polycarboxylic acid water reducing agent by using acrylic fiber immobilized manganese oxide, and belongs to the technical field of water reducing agent preparation. The method is characterized by mainly comprising the following steps. The preparation method comprises the following steps: 1, preparation of a catalyst: performing carboxymethylation on ethylenediamine functionalized acrylic fibers, complexing manganese ions, and oxidizing with a potassium permanganate solution to obtain the acrylic fiber immobilized manganese oxide catalyst; and 2, catalytic synthesis of the polycarboxylate superplasticizer: polymerizing the macromonomer diethylene glycol monovinyl ether and the micromonomer acrylic acid to prepare the polycarboxylate superplasticizer. Manganese oxide has a certain promotion effect on generation of active free radicals and monomer polymerization, so that the molecular weight and distribution of the water reducing agent and the monomer conversion rate can be improved. In addition, the acrylic fiber immobilized manganese oxide improves the recovery rate of the powdered manganese oxide, the recovery steps are simplified, and the fibrous catalyst can be woven into various required shapes, so that the method has better industrial application value.
本发明涉及一种腈纶固载氧化锰催化合成聚羧酸减水剂的方法，属于减水剂制备技术领域。其特征主要包括如下步骤。一、催化剂的制备：将乙二胺功能化腈纶纤维进行羧甲基化，络合锰离子后用高锰酸钾溶液进行氧化，从而得到腈纶纤维固载氧化锰催化剂。二、催化合成聚羧酸减水剂：利用大单体二乙二醇单乙烯基醚与小单体丙烯酸聚合，从而制得聚羧酸减水剂。本发明中氧化锰对活性自由基的生成和单体聚合都有一定的促进作用，从而可以提减水剂高的分子量及其分布和的单体转化率。另外，腈纶纤维固载氧化锰提高了粉末氧化锰的回收率，简化了回收步骤，而且，纤维状催化剂可以编制成多种所需形状，具有较好的工业应用价值。
Method for catalytically synthesizing polycarboxylate superplasticizer by using acrylic fiber immobilized manganese oxide
一种腈纶固载氧化锰催化合成聚羧酸减水剂的方法
LI PENGYU (author) / LIAO JINGRU (author) / ZHANG XIAORUI (author) / YANG CHENGXIAO (author) / ZHI SHUSHEN (author) / AI WENYING (author) / CHEN YONGQIANG (author) / CUI HAITAO (author) / LIU YUAN (author) / ZOU JIAWEI (author)
2023-12-19
Patent
Electronic Resource
Chinese
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