Synthesis of water-resistant hybrid geopolymer composites using polydimethylsiloxane and triethoxysilane

IF 2.4 3区化学 Q4 CHEMISTRY, PHYSICAL

Chemical Physics Pub Date : 2025-07-24 DOI:10.1016/j.chemphys.2025.112877

Shehla Naz Gul , Muhammad Jawad , Saeed Gul , Sabiha Sultana , Noor-ul-Amin

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引用次数: 0

Abstract

This study presents the development of a novel hydrophobic geopolymer system based on metakaolin, engineered through the direct incorporation of polydimethylsiloxane (PDMS) and triethoxysilane (TES) into the precursor mix. Aimed at overcoming the limitations of traditional internal waterproofing approaches, this method imparts hydrophobicity at the matrix level without compromising mechanical integrity. Comprehensive characterization including contact angle measurements, FT-IR, SEM, EDX, and water absorption tests revealed significant enhancements in hydrophobicity, structural density, and long-term impermeability. The PDMS modified geopolymer exhibited a superhydrophobic contact angle of 150° and a water absorption rate as low as 0.21 % after 28 days, compared to 1.55 % for the unmodified control. FT-IR and EDX analyses confirmed the successful integration of hydrophobic groups, while SEM images showed improved matrix compaction. These findings highlight the potential of PDMS and TES as a water-resistant geopolymer suitable for infrastructure applications in aggressive or moisture-prone environments.

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用聚二甲基硅氧烷和三乙氧基硅氧烷合成耐水杂化地聚合物复合材料

本研究提出了一种基于偏高岭土的新型疏水地聚合物体系，该体系通过将聚二甲基硅氧烷（PDMS）和三乙氧基硅烷（TES）直接掺入前驱体混合物中而设计。该方法旨在克服传统内部防水方法的局限性，在不影响机械完整性的情况下，在基质水平上赋予疏水性。包括接触角测量、FT-IR、SEM、EDX和吸水测试在内的综合表征显示，该材料的疏水性、结构密度和长期不渗透性都有显著提高。PDMS改性的地聚合物在28天后的超疏水接触角为150°，吸水率低至0.21%，而未经改性的对照为1.55%。FT-IR和EDX分析证实了疏水性基团的成功整合，而SEM图像显示了改进的基质压实。这些发现突出了PDMS和TES作为一种防水地聚合物的潜力，适用于侵略性或易潮湿环境的基础设施应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

4.60

自引率

4.30%

发文量

278

审稿时长

39 days

期刊介绍： Chemical Physics publishes experimental and theoretical papers on all aspects of chemical physics. In this journal, experiments are related to theory, and in turn theoretical papers are related to present or future experiments. Subjects covered include: spectroscopy and molecular structure, interacting systems, relaxation phenomena, biological systems, materials, fundamental problems in molecular reactivity, molecular quantum theory and statistical mechanics. Computational chemistry studies of routine character are not appropriate for this journal.