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聚氨基酸衍生型膦酸基减水剂的合成与性能研究
Synthesis and Performance of Phosphate-Based Superplasticizer Derived from Polyamino Acid
2023年第5期
膦酸基;减水剂;氨基酸;合成;性能;硫酸盐;保坍性能;水泥;吸附
Phosphate; Superplasticizer; Amino acid; Synthesis; Performance; Sulfate; Slump retention ability; Cement; Adsorption
2023年第5期
10.19761/j.1000-4637.2023.05.001.06
国家自然科学基金青年基金项目(51902142)。
胡 聪,周栋梁,舒 鑫,杨 勇
高性能土木工程材料国家重点实验室 江苏苏博特新材料股份有限公司,江苏 南京 211103

胡 聪,周栋梁,舒 鑫,杨 勇

胡聪,周栋梁,舒鑫,等.聚氨基酸衍生型膦酸基减水剂的合成与性能研究[J].混凝土与水泥制品,2023(5):1-6.

HU C,ZHOU D L,SHU X,et al.Synthesis and Performance of Phosphate-Based Superplasticizer Derived from Polyamino Acid[J].China Concrete and Cement Product,2023(5):1-6.

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摘   要:通过聚琥珀酰亚胺(PSI)与氨基开环反应,成功合成了一种新型聚氨基酸衍生型膦酸基减水剂(PSI-g-PEGAP),研究了该减水剂对水泥基材料的影响规律,并与聚羧酸减水剂(PCE)在硫酸盐耐受性方面进行了比较。此外,根据吸附测试、动态光散射表征等,分析了PSI-g-PEGAP与水泥颗粒的相互作用。结果表明:通过引入膦酸基,明显提升了减水剂的减水、保坍性能,且平衡吸附量可增大1倍;与PCE相比,流体力学直径明显增大约10倍,对硫酸盐耐受性也有显著提高。 Abstract: Through the ring-opening reaction between polysuccinimide(PSI) and amino group, a new type of polyamino acid-derived phosphate superplasticizer(PSI-g-PEGAP) was successfully synthesized. The effect rules of PSI-g-PEGAP on cement-based materials were systematically studied, and the sulfate resistance performance was compared with that of polycarboxylate superplasticizer(PCE). In addition, through adsorption tests, dynamic light scattering characterization, the interaction of PSI-g-PEGAP with cement particles was also carried out. The results show that the introduction of phosphate esters significantly improves the dispersion and retention performance of superplasticizer, and the equilibrium adsorption capacity is increased by 1 times. Compared with PCE, the hydrodynamic diameter of PSI-g-PEGAP is significantly increased by 10 times, and the sulfate resistance is also significantly improved.
英文名 : Synthesis and Performance of Phosphate-Based Superplasticizer Derived from Polyamino Acid
刊期 : 2023年第5期
关键词 : 膦酸基;减水剂;氨基酸;合成;性能;硫酸盐;保坍性能;水泥;吸附
Key words : Phosphate; Superplasticizer; Amino acid; Synthesis; Performance; Sulfate; Slump retention ability; Cement; Adsorption
刊期 : 2023年第5期
DOI : 10.19761/j.1000-4637.2023.05.001.06
文章编号 :
基金项目 : 国家自然科学基金青年基金项目(51902142)。
作者 : 胡 聪,周栋梁,舒 鑫,杨 勇
单位 : 高性能土木工程材料国家重点实验室 江苏苏博特新材料股份有限公司,江苏 南京 211103

胡 聪,周栋梁,舒 鑫,杨 勇

胡聪,周栋梁,舒鑫,等.聚氨基酸衍生型膦酸基减水剂的合成与性能研究[J].混凝土与水泥制品,2023(5):1-6.

HU C,ZHOU D L,SHU X,et al.Synthesis and Performance of Phosphate-Based Superplasticizer Derived from Polyamino Acid[J].China Concrete and Cement Product,2023(5):1-6.

摘要
参数
结论
参考文献
引用本文

摘   要:通过聚琥珀酰亚胺(PSI)与氨基开环反应,成功合成了一种新型聚氨基酸衍生型膦酸基减水剂(PSI-g-PEGAP),研究了该减水剂对水泥基材料的影响规律,并与聚羧酸减水剂(PCE)在硫酸盐耐受性方面进行了比较。此外,根据吸附测试、动态光散射表征等,分析了PSI-g-PEGAP与水泥颗粒的相互作用。结果表明:通过引入膦酸基,明显提升了减水剂的减水、保坍性能,且平衡吸附量可增大1倍;与PCE相比,流体力学直径明显增大约10倍,对硫酸盐耐受性也有显著提高。

Abstract: Through the ring-opening reaction between polysuccinimide(PSI) and amino group, a new type of polyamino acid-derived phosphate superplasticizer(PSI-g-PEGAP) was successfully synthesized. The effect rules of PSI-g-PEGAP on cement-based materials were systematically studied, and the sulfate resistance performance was compared with that of polycarboxylate superplasticizer(PCE). In addition, through adsorption tests, dynamic light scattering characterization, the interaction of PSI-g-PEGAP with cement particles was also carried out. The results show that the introduction of phosphate esters significantly improves the dispersion and retention performance of superplasticizer, and the equilibrium adsorption capacity is increased by 1 times. Compared with PCE, the hydrodynamic diameter of PSI-g-PEGAP is significantly increased by 10 times, and the sulfate resistance is also significantly improved.

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(1)制备的PSI-g-PEGAP最佳接枝比例为nA∶nE∶nP=3∶1∶0.8,水解时间为4 h时,其分散性能最佳。
(2)合成优化后,PSI-g-PEGAP有更大的流体力学直径,饱和吸附量提高近1倍,且减水、保坍性能有显著提升。
(3)由于膦酸基团的引入和较厚的溶剂化层,在相同流动度下,PSI-g-PEGAP的硫酸盐耐受性比PCE明显提高,当掺入1.0%的Na2SO4时,掺PSI-g-PEGAP的水泥净浆流动度损失仅为掺PCE-1水泥净浆流动度损失的1/3。

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,周栋梁,舒鑫,等.聚氨基酸衍生型膦酸基减水剂的合成与性能研究[J].混凝土与水泥制品,2023(5):1-6.

HU C,ZHOU D L,SHU X,et al.Synthesis and Performance of Phosphate-Based Superplasticizer Derived from Polyamino Acid[J].China Concrete and Cement Product,2023(5):1-6.

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