A new freeze-thaw resistant superhydrophobic surface for cement-based materials with self-cleaning and anti/de-icing performance

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL

Cold Regions Science and Technology Pub Date : 2024-12-17 DOI:10.1016/j.coldregions.2024.104404

Wansheng Pei , Feifan Zhang , Mingyi Zhang , Jinlong Yang , Deke Li , Chong Wang , Yuanming Lai

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引用次数: 0

Abstract

Freeze-thaw (F-T) cycles can significantly deteriorate materials through water infiltration, pore water migration, ice-water phase transitions, and changes in pore structure. Traditional approaches primarily focus on modifying the internal pore structure to passively resist the F-T effects. In this study, we propose an active defense strategy based on wetting theory to enhance F-T resistance. We developed a new superhydrophobic surface tailored for the coarse and porous structure of cement mortar by employing polydimethylsiloxane (PDMS) as the primary film-forming substance and binder. Wetting-modified silica (SiO₂) nanoparticles, treated with silane coupling agent KH570, were used to construct a micro-nano multilayer structure. To further enhance hydrophobicity, a reentrant porous micro-skeleton was formed through the phase separation of the PDMS mixture. By optimizing the chemical composition of the PDMS/KH570@SiO₂ suspension, we achieved an exceptional superhydrophobic surface on the porous cement mortar. The performance of this surface was rigorously evaluated, including assessments of mechanical durability, self-cleaning behavior, anti-icing and de-icing properties, and F-T resistance. The results demonstrate that the new superhydrophobic surface delays the water droplet freezing time by approximately 23 times and improves the F-T resistance of cement mortar by at least 25 % compared to control samples. This study provides a novel approach for enhancing the durability of cement-based materials under F-T conditions in cold region engineering.

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来源期刊

Cold Regions Science and Technology 工程技术-地球科学综合

CiteScore

7.40

自引率

12.20%

发文量

209

审稿时长

4.9 months

期刊介绍： Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.