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Method for catalytically synthesizing polycarboxylate superplasticizer from acrylic immobilized copper oxide
The invention relates to a method for catalytically synthesizing a polycarboxylic acid water reducing agent from acrylic fiber immobilized copper 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: adding a certain amount of polyethylene glycol and ammonia water into a mixed solution of copper sulfate and sodium carbonate, adding alkali to treat acrylic fibers, and reacting in a hydrothermal kettle at a certain temperature to prepare the acrylic fiber immobilized copper oxide catalyst; and 2, catalytic synthesis of the polycarboxylate superplasticizer: polymerizing a large monomer isopentenol polyoxyethylene ether (TPEG) and a small monomer acrylic acid (AA) to prepare the polycarboxylate superplasticizer. The copper 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 copper oxide improves the recovery rate of the powdered copper 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铜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：在硫酸铜和碳酸钠的混合溶液中加入一定量的聚乙二醇和氨水，加入碱处理腈纶纤维后，在水热釜中一定温度下反应制得腈纶纤维固载氧化铜催化剂。二、催化合成聚羧酸减水剂：利用大单体异戊烯醇聚氧乙烯醚（TPEG）与小单体丙烯酸（AA）聚合，从而制得聚羧酸减水剂。本发明中氧化铜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，腈纶纤维固载氧化铜提高了粉末氧化铜的回收率，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 from acrylic immobilized copper oxide
The invention relates to a method for catalytically synthesizing a polycarboxylic acid water reducing agent from acrylic fiber immobilized copper 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: adding a certain amount of polyethylene glycol and ammonia water into a mixed solution of copper sulfate and sodium carbonate, adding alkali to treat acrylic fibers, and reacting in a hydrothermal kettle at a certain temperature to prepare the acrylic fiber immobilized copper oxide catalyst; and 2, catalytic synthesis of the polycarboxylate superplasticizer: polymerizing a large monomer isopentenol polyoxyethylene ether (TPEG) and a small monomer acrylic acid (AA) to prepare the polycarboxylate superplasticizer. The copper 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 copper oxide improves the recovery rate of the powdered copper 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铜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：在硫酸铜和碳酸钠的混合溶液中加入一定量的聚乙二醇和氨水，加入碱处理腈纶纤维后，在水热釜中一定温度下反应制得腈纶纤维固载氧化铜催化剂。二、催化合成聚羧酸减水剂：利用大单体异戊烯醇聚氧乙烯醚（TPEG）与小单体丙烯酸（AA）聚合，从而制得聚羧酸减水剂。本发明中氧化铜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，腈纶纤维固载氧化铜提高了粉末氧化铜的回收率，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 from acrylic immobilized copper oxide
一种腈纶固载氧化铜催化合成聚羧酸减水剂的方法
LIAO JINGRU (author) / LI PENGYU (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)
2024-01-09
Patent
Electronic Resource
Chinese
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