Matrix wettability and mechanical properties of geopolymer cement-polydimethylsiloxane (PDMS) hybrids

Ruan, Shengqian; Chen, Shikun; Zhu, Xiang; Zeng, Qiang; Liu, Yi; Lai, Junying; Yan, Dongming

doi:10.1016/j.cemconcomp.2021.104268

Cited by 38 publications

(12 citation statements)

References 69 publications

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“…can be used as raw materials at ambient polymerization temperatures, the geopolymerization avoids the high energy consumption and CO 2 emission in the high temperature sintering process of ceramic production . Recently, we demonstrated a viable approach to synthesize a hydrophobic geopolymer with low water absorption capability by the incorporation of polydimethylsiloxane (PDMS), an organic macromolecule, in geopolymerization. , However, as PDMS and sodium aluminosilicate hydrate (NASH) gels are phase-separated rather than bonded at the molecular level, the bonding capacity of PDMS molecules to the geopolymer matrix is relatively weak. As a result, the PDMS-modified geopolymers may lose their waterproofing function in long-term alternating wet–dry or organic erosion environments.…”

Section: Introductionmentioning

confidence: 99%

Molecular-Level Hybridized Hydrophobic Geopolymer Ceramics for Corrosion Protection

et al. 2023

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Hydrophobic ceramics with low surface energies have a broad range of applications in both industry and domestic fields. However, the common surface-treatment-based hydrophobic ceramics are usually vulnerable and easily lose functions due to surficial mechanical damages. To address this challenge, here we propose a new strategy to produce intrinsically hydrophobic ceramics by leveraging alkylated-geopolymerization. As proof-of-concept, we designed and synthesized an alkylatedgeopolymer (AGP) based ceramic with excellent waterproof performance and damage tolerance. Microstructure characterizations reveal that this organic−inorganic hybrid ceramic contains hybridized inorganic aluminosilicate networks and the alkylatedsilicate units at the molecular level, offering benefits of superior hydrophobicity and functional robustness. The geopolymerization-mediated synthetic route demonstrated here enables a facile access to robust hybrid coating materials for enduring protection of metallic surfaces from corrosion in thermal environments (<350 °C) with high humidity. This work bridges the gaps between the organosilicate polymers and the inorganic aluminosilicate ceramics and helps open new avenues for designing of new functional ceramics from the molecular scale by a clean and low-cost procedure.

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Section: Introductionmentioning

confidence: 99%

Molecular-Level Hybridized Hydrophobic Geopolymer Ceramics for Corrosion Protection

et al. 2023

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“…Huang et al [18] reported that the use of edible oil can reduce the surface tension of concrete and make its internal structure denser, thereby effectively reducing the autogenous shrinkage of concrete by 68% without obvious strength loss. In addition, different from other frequently-used measurements for mitigating the shrinkage by adding internal curing admixtures [19][20] or shrinkage-reducing admixtures [11,[21][22], modifying the wettability through organic admixtures can also enable the geopolymer with water repellence and corrosion resistance performance [23][24][25][26]. As hydrophobization can significantly reduce the capillary force in the porous medium, the moisture and water carrying corrosive ions cannot easily penetrate.…”

Section: Introductionmentioning

confidence: 99%

Early-age deformation of hydrophobized metakaolin-based geopolymers

Ruan

Chen

Liu

et al. 2023

Cement and Concrete Research

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“…can be used as raw materials and polymerization occurs at ambient temperatures, the geopolymerization avoids the high energy consumption and CO 2 emission in high temperature sintering process of ceramic production 24 . Recently, we demonstrated a viable approach to synthesis hydrophobic geopolymer by the incorporation of polydimethylsiloxane (PDMS) in geopolymerization 25,26 , which resulted in the formation of a hybrid geopolymer with strong hydrophobicity and low water absorption capability. However, as the mixtures of PDMS and the sodium aluminosilicate hydrate (NASH) gel are phase-separated at the nanoscale rather than mixed at the molecular level, this hybrid hydrophobic geopolymer exhibits a multi-stage water sorptivity behavior with a delayed primary water absorption after about 10 hours of contacting with water.…”

Section: Introductionmentioning

confidence: 99%

Molecular level hybridized hydrophobic ceramics for corrosion protection

Ruan¹,

Chen

Zhang

et al. 2022

Preprint

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Hydrophobic ceramics with low surface energies have a broad range of applications in both industry and domestic fields. However, the common surface-treatment-based hydrophobic ceramics are usually vulnerable and easy to lose functions due to surficial mechanical damages. To address this challenge, here we propose a new strategy to produce intrinsically hybrid hydrophobic ceramics by leveraging alkylated-geopolymerization. As proof-of-concept, we designed and synthesized an alkylated-geopolymer (AGP) based ceramic with excellent waterproof performance and damage tolerance. Microstructure characterizations reveal that this organic-inorganic hybrid ceramic contains hybridized inorganic aluminosilicate networks and the alkylated-silicate units at the molecular scale, offering benefits of high hydrophobicity and functional robustness. The geopolymerization-mediated synthetic route demonstrate here enables a facile access to robust hybrid coating materials for enduring protection of metallic surfaces from corrosion in thermal environments (< 350°C) with high humidity. Furthermore, our work also opens new avenues for designing of new functional ceramics from the molecular scale by a clean and low-cost procedure.

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Matrix wettability and mechanical properties of geopolymer cement-polydimethylsiloxane (PDMS) hybrids

Cited by 38 publications

References 69 publications

Molecular-Level Hybridized Hydrophobic Geopolymer Ceramics for Corrosion Protection

Molecular-Level Hybridized Hydrophobic Geopolymer Ceramics for Corrosion Protection

Early-age deformation of hydrophobized metakaolin-based geopolymers

Molecular level hybridized hydrophobic ceramics for corrosion protection

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