改性纳米SiO2-苯丙乳液混凝土复合防护涂层的制备及性能研究

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发布时间：2020-01-06 00:00:00

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改性纳米SiO2-苯丙乳液混凝土复合防护涂层的制备及性能研究

Preparation and properties of modified nano-SiO2-styrene acrylic lotion composite protective coating for concrete

2024年第11期

硅烷偶联剂；纳米SiO2；苯丙乳液；表面改性；混凝土复合涂层混凝土；冻融循环

Silane coupling agent; Nano-SiO2; Styrene acrylic lotion; Surface modification; Concrete composite coating; Freeze-thaw cycle

2024年第11期

10.19761/j.1000-4637.2024.11.001.06

重庆市教委科学技术研究项目（KJZD-K202012905）。

余茂林1，2，邓安仲2，沈海玉1，罗盛2，*，杨艺斌1

1.中国人民解放军96784部队，河南洛阳 471000；2.中国人民解放军陆军勤务学院，重庆 401311

余茂林1，2，邓安仲2，沈海玉1，罗盛2，*，杨艺斌1

余茂林,邓安仲,沈海玉,等.改性纳米SiO2-苯丙乳液混凝土复合防护涂层的制备及性能研究[J].混凝土与水泥制品,2024(11):1-6

YU M L,DENG A Z,SHEN H Y,et al.Preparation and properties of modified nano-SiO2-styrene acrylic lotion composite protective coating for concrete[J].China Concrete and Cement Products,2024(11):1-6.

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摘要：采用硅烷偶联剂KH560对纳米SiO2进行接枝改性，通过傅里叶红外变换光谱、热重分析及微观形貌分析等方法研究了KH560对纳米SiO2改性机理的影响，探究了改性SiO2-苯丙乳液复合涂层中掺入一定质量分数的改性纳米SiO2对混凝土抗硫酸盐溶液冻融性能的影响，并分析了改性纳米SiO2对苯丙乳液涂层的增强机理。结果表明：采用KH560改性后，纳米SiO2颗粒的团聚状态得到了显著改善，热稳定性提高；当改性纳米SiO2的质量分数为4%时，C4复合涂层对混凝土的防护作用最好，此时混凝土抗硫酸盐溶液冻融等级由F100~F150提升到F300以上；300次硫酸盐溶液冻融循环后，混凝土的质量损失率仅为0.35%，相对动弹性模量为96.2%，此时混凝土内部结构并未发生明显破坏。 Abstract: Modification of nano-SiO2 with KH560 silane coupling agent was studied by Fourier transform infrared spectroscopy, thermogravimetric analysis, and microscopic morphology analysis. The modification mechanism of nano-SiO2 with KH560 was explored. The influence of adding a certain mass fraction of modified nano-SiO2 on the freeze-thaw resistance of concrete against sulfate solution was investigated, and the strengthening mechanism of modified nano-SiO2 on styrene acrylic lotion coating was analyzed. The results show that after modification with KH560, the agglomeration state of nano-SiO2 particles is significantly improved, and the thermal stability is enhanced. When the mass fraction of modified nano-SiO2 is 4%, the C4 composite coating has the best protective effect on concrete, and the freeze-thaw resistance of concrete to sulfate solution is increased from F100~F150 to F300 or above. After 300 freeze-thaw cycles of sulfate solution, the mass loss rate of concrete is only 0.35%, and the relative dynamic modulus of elasticity is 96.2%. At this time, there is no significant damage to the internal structure of the concrete.

英文名 : Preparation and properties of modified nano-SiO2-styrene acrylic lotion composite protective coating for concrete

刊期 : 2024年第11期

关键词 : 硅烷偶联剂；纳米SiO2；苯丙乳液；表面改性；混凝土复合涂层混凝土；冻融循环

Key words : Silane coupling agent; Nano-SiO2; Styrene acrylic lotion; Surface modification; Concrete composite coating; Freeze-thaw cycle

刊期 : 2024年第11期

DOI : 10.19761/j.1000-4637.2024.11.001.06

文章编号 :

基金项目 : 重庆市教委科学技术研究项目（KJZD-K202012905）。

作者 : 余茂林1，2，邓安仲2，沈海玉1，罗盛2，*，杨艺斌1

单位 : 1.中国人民解放军96784部队，河南洛阳 471000；2.中国人民解放军陆军勤务学院，重庆 401311

余茂林1，2，邓安仲2，沈海玉1，罗盛2，*，杨艺斌1

余茂林,邓安仲,沈海玉,等.改性纳米SiO2-苯丙乳液混凝土复合防护涂层的制备及性能研究[J].混凝土与水泥制品,2024(11):1-6

YU M L,DENG A Z,SHEN H Y,et al.Preparation and properties of modified nano-SiO2-styrene acrylic lotion composite protective coating for concrete[J].China Concrete and Cement Products,2024(11):1-6.

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摘要

参数

结论

参考文献

引用本文

摘要：采用硅烷偶联剂KH560对纳米SiO₂进行接枝改性，通过傅里叶红外变换光谱、热重分析及微观形貌分析等方法研究了KH560对纳米SiO₂改性机理的影响，探究了改性SiO₂-苯丙乳液复合涂层中掺入一定质量分数的改性纳米SiO₂对混凝土抗硫酸盐溶液冻融性能的影响，并分析了改性纳米SiO₂对苯丙乳液涂层的增强机理。结果表明：采用KH560改性后，纳米SiO₂颗粒的团聚状态得到了显著改善，热稳定性提高；当改性纳米SiO₂的质量分数为4%时，C4复合涂层对混凝土的防护作用最好，此时混凝土抗硫酸盐溶液冻融等级由F100~F150提升到F300以上；300次硫酸盐溶液冻融循环后，混凝土的质量损失率仅为0.35%，相对动弹性模量为96.2%，此时混凝土内部结构并未发生明显破坏。

Abstract: Modification of nano-SiO₂ with KH560 silane coupling agent was studied by Fourier transform infrared spectroscopy, thermogravimetric analysis, and microscopic morphology analysis. The modification mechanism of nano-SiO₂ with KH560 was explored. The influence of adding a certain mass fraction of modified nano-SiO₂ on the freeze-thaw resistance of concrete against sulfate solution was investigated, and the strengthening mechanism of modified nano-SiO₂ on styrene acrylic lotion coating was analyzed. The results show that after modification with KH560, the agglomeration state of nano-SiO₂ particles is significantly improved, and the thermal stability is enhanced. When the mass fraction of modified nano-SiO₂ is 4%, the C4 composite coating has the best protective effect on concrete, and the freeze-thaw resistance of concrete to sulfate solution is increased from F100~F150 to F300 or above. After 300 freeze-thaw cycles of sulfate solution, the mass loss rate of concrete is only 0.35%, and the relative dynamic modulus of elasticity is 96.2%. At this time, there is no significant damage to the internal structure of the concrete.

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