水工混凝土的超疏水仿生构建及微观机理

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (6): 2031-2038.

水工混凝土的超疏水仿生构建及微观机理

王波¹, 钱军¹, 罗杰², 徐怡², 储洪强², 蒋林华²

1.三峡金沙江川云水电开发有限公司宜宾向家坝电厂,宜宾 650224;
2.河海大学力学与材料学院,南京 211100

收稿日期:2023-11-10 修订日期:2024-01-04 出版日期:2024-06-15 发布日期:2024-06-18
通信作者: 徐怡,博士,副教授。E-mail:xuyihhu@163.com
作者简介:王波(1979—),男。主要从事混凝土质量控制研究、水工建筑物运行维护等工作。E-mail:wang_bo5@cypc.com.cn
基金资助:
中国长江电力股份有限公司资助(Z422302003)

Superhydrophobic Biomimetic Construction and Microscopic Mechanism of Hydraulic Concrete

WANG Bo¹, QIAN Jun¹, LUO Jie², XU Yi², CHU Hongqiang², JIANG Linhua²

1. Xiangjiaba Hydropower Plant, Three Gorges Jinsha River Chuanyun Hydropower Development Co., Ltd, Yibin 650224, China;
2. College of Mechanics and Materials, Hohai University, Nanjing 211100, China

Received:2023-11-10 Revised:2024-01-04 Online:2024-06-15 Published:2024-06-18

摘要/Abstract

摘要： 将有机异辛基三乙氧基硅烷(TS)与无机纳米二氧化硅复合,通过“二元协同”仿生方法,制备了整体超疏水水工混凝土,探究了TS掺量和养护条件对混凝土力学性能和疏水性能的影响,并采用扫描电子显微镜(SEM)、X射线衍射(XRD)、红外光谱(FT-IR)分析了材料的微观形貌、物相组成和疏水改性机理。结果表明,养护条件对混凝土疏水性影响较大,在自然养护条件下,当TS掺量达到3%(质量分数)后,混凝土均呈现出超疏水状态,最大接触角为155.6°。纳米粒子的掺入促进了水泥水化,提升了试件的抗压强度。改性后的水工混凝土具有良好的疏水性,288 h浸水吸水率下降了68.8%。

关键词: 水工混凝土, 异辛基三乙氧基硅烷, 接触角, 力学性能, 吸水率, 官能团

Abstract: The organic isooctyltriethoxysilane (TS) and inorganic nanosilicon dioxide (nano-SiO₂) were combined to prepare monolithic superhydrophobic hydraulic concrete by "binary synergistic" biomimetic method, and the effects of TS dosage and curing conditions on the mechanical properties and hydrophobicity properties of concrete were investigated. The microscopic morphology, phase composition and hydrophobic modification mechanism of materials were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and fourier transform infrared spectrometer (FT-IR). The results show that the curing conditions have a large influence on the hydrophobicity of concrete. Under natural curing conditions, when TS dosage reaches 3% (mass fraction), the concrete all exhibits superhydrophobicity, with a maximum contact angle of 155.6°. The incorporation of nanoparticles promotes cement hydration and enhances compressive strength of specimens. The modified hydraulic concrete has good hydrophobicity, and the water absorption rate decreases by 68.8% in 288 h immersion.

Key words: hydraulic concrete, isooctyltriethoxysilane, contact angle, mechanical property, water absorption rate, functional group

中图分类号:

TU528.01

王波, 钱军, 罗杰, 徐怡, 储洪强, 蒋林华. 水工混凝土的超疏水仿生构建及微观机理[J]. 硅酸盐通报, 2024, 43(6): 2031-2038.

WANG Bo, QIAN Jun, LUO Jie, XU Yi, CHU Hongqiang, JIANG Linhua. Superhydrophobic Biomimetic Construction and Microscopic Mechanism of Hydraulic Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(6): 2031-2038.

参考文献

[1] 修建得, 金祖权, 李宁, 等. 海洋盐雾环境下混凝土中氯离子传输研究进展[J]. 硅酸盐通报, 2023, 42(3): 771-785.
XIU J D, JIN Z Q, LI N, et al. Progress of chloride ion transport in concrete under marine salt spray environment [J]. Bulletin of the Chinese Ceramic Society, 2023, 42(3): 771-785 (in Chinese).
[2] 徐文胜, 吴贤国, 冯宗宝, 等. 复杂环境多因素耦合作用下混凝土耐久性能劣化分析[J]. 现代隧道技术, 2022, 59(6): 239-249.
XU W S, WU X G, FENG Z B, et al. Analysis of deterioration of concrete durability performance under multi-factor coupling in complex environment [J]. Modern Tunnelling Technology, 2022, 59(6): 239-249 (in Chinese).
[3] 曹雁峰. 冻融-硫酸盐干湿侵蚀复合作用下混凝土的劣化机制与寿命预测[D]. 武汉: 武汉大学, 2019.
CAO Y F. Deterioration mechanism and life prediction of concrete under freeze-thaw-sulfate dry and wet erosion composite[D]. Wuhan: Wuhan University, 2019 (in Chinese).
[4] 彭泽川, 周扬, 陈鲁川, 等. 超硫水泥混凝土抗盐冻性能及提升研究[J]. 硅酸盐通报, 2022, 41(2): 415-424.
PENG Z C, ZHOU Y, CHEN L C, et al. Study on salt freezing resistance and enhancement of supersulfur cement concrete[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(2): 415-424 (in Chinese).
[5] LI Q, YANG K, YANG C H. An alternative admixture to reduce sorptivity of alkali-activated slag cement by optimising pore structure and introducing hydrophobic film[J]. Cement and Concrete Composites, 2019, 95: 183-192.
[6] MA Z M, ZHU F Z, ZHAO T. Effects of surface modification of silane coupling agent on the properties of concrete with freeze-thaw damage[J]. KSCE Journal of Civil Engineering, 2018, 22(2): 657-669.
[7] 叶金兴. 具有荷叶效应的超疏水纺织物[J]. 现代纺织技术, 2010, 18(2): 52-54.
YE J X. Superhydrophobic textiles with lotus leaf effect [J]. Advanced Textile Technology, 2010, 18(2): 52-54 (in Chinese).
[8] 田为军, 张兴旺, 王骥月, 等. 水黾多腿并排表面的疏水性能[J]. 高等学校化学学报, 2014, 35(8): 1726-1730.
TIAN W J, ZHANG X W, WANG J Y, et al. Surface properties of hydrophobic side by side water strider legs[J]. Chemical Journal of Chinese Universities, 2014, 35(8): 1726-1730 (in Chinese).
[9] 江雷. 从自然到仿生的超疏水纳米界面材料[J]. 新材料产业, 2004(3): 60-65.
JIANG L. From natural to biomimetic superhydrophobic nanofacial materials[J]. New Materials Industry, 2004(3): 60-65 (in Chinese).
[10] 江雷. 二元协同纳米界面材料的设计和研制[J]. 新材料产业, 2001(1): 14-15.
JIANG L. Design and development of binary collaborative nanointerface materials[J]. Advanced Materials Industry, 2001(1): 14-15 (in Chinese).
[11] HUSNI H, NAZARI M R, YEE H M, et al. Superhydrophobic rice husk ash coating on concrete[J]. Construction and Building Materials, 2017, 144: 385-391.
[12] HORGNIES M, CHEN J J. Superhydrophobic concrete surfaces with integrated microtexture[J]. Cement and Concrete Composites, 2014, 52: 81-90.
[13] 韩正金. 高强度超疏水混凝土制备及其性能研究[D]. 大连: 大连理工大学, 2017.
HAN Z J. Research on the preparation of high-strength superhydrophobic concrete and its performance[D]. Dalian: Dalian University of Technology, 2017 (in Chinese).
[14] WANG F J, LEI S, OU J F, et al. Effect of PDMS on the waterproofing performance and corrosion resistance of cement mortar[J]. Applied Surface Science, 2020, 507: 145016.
[15] MUZENSKI S, FLORES-VIVIAN I, SOBOLEV K. Durability of superhydrophobic engineered cementitious composites[J]. Construction and Building Materials, 2015, 81: 291-297.
[16] 梁永贤. 硅烷偶联剂改性TiO₂/聚丙烯酸树脂复合材料的制备及其复鞣性能[J]. 皮革与化工, 2021, 38(2): 1-9.
LIANG Y X. Preparation and retanning performance of silane coupling agent modified TiO₂/polyacrylic resin composite[J]. Leather and Chemicals, 2021, 38(2): 1-9 (in Chinese).
[17] 蒙绍强. 纳米材料对水泥水化影响机理的研究[D]. 广州: 广州大学, 2022.
MENG S Q. Research on the mechanism of the effect of nanomaterials on cement hydration [D]. Guangzhou: Guangzhou University, 2022 (in Chinese).
[18] 李雪萍. 碱矿渣混凝土强度及流动性研究[J]. 河南科学, 2019, 37(9): 1422-1426.
LI X P. Strength and fluidity of alkali slag concrete[J]. Henan Science, 2019, 37(9): 1422-1426 (in Chinese).
[19] 胡小云. 新型偶联剂改良超疏水混凝土工程性能研究[J]. 水利技术监督, 2022, 30(4): 194-195+234.
HU X Y. Study on engineering performance of super hydrophobic concrete improved by new coupling agent[J]. Technical Supervision in Water Resources, 2022, 30(4): 194-195+234 (in Chinese).
[20] 鲁浈浈, 何杨, 王杰, 等. 环氧树脂/SiO₂涂层混凝土表面主动抗凝冰性及除冰性能研究[J]. 表面技术, 2020, 49(10): 169-175.
LU Z Z, HE Y, WANG J, et al. Initiative anti-icing performance and deicing ability of epoxy/SiO₂ coating concrete surface[J]. Surface Technology, 2020, 49(10): 169-175 (in Chinese).
[21] SHE W, ZHENG Z H, ZHANG Q C, et al. Predesigning matrix-directed super-hydrophobization and hierarchical strengthening of cement foam[J]. Cement and Concrete Research, 2020, 131: 106029.
[22] 赵洁燕. 丙酮脱水缩合生成异丙叉丙酮的动力学及催化精馏模拟研究[D]. 天津: 天津大学, 2019.
ZHAO J Y. Kinetics and catalytic distillation simulation of acetone dehydration condensation to isopropylacetone[D]. Tianjin: Tianjin University, 2019 (in Chinese).
[23] XIANG T F, LIU J, LV Z, et al. The effect of silicon-based waterproof agent on the wettability of superhydrophobic concrete and enhanced corrosion resistance[J]. Construction and Building Materials, 2021, 313: 125482.
[24] 高英力, 何倍, 蒋正武, 等. 超疏水改性自发光水泥基材料的性能与微结构[J]. 建筑材料学报, 2020, 23(1): 192-199+209.
GAO Y L, HE B, JIANG Z W, et al. Properties and micro-structure of super-hydrophobic modified self-luminous cement-based materials[J]. Journal of Building Materials, 2020, 23(1): 192-199+209 (in Chinese).
[25] WENZEL R N. Resistance of solid surfaces to wetting by water[J]. Industrial & Engineering Chemistry, 1936, 28(8): 988-994.
[26] WENZEL R N. Surface roughness and contact angle[J]. The Journal of Physical and Colloid Chemistry, 1949, 53(9): 1466-1467.