Application of epoxy resin in cultural relics protection

Chen, Zhaoru; Liu, Xiaoxu; Chen, Haonan; Li, Jialong; Wang, Xiaofeng; Zhu, Jianfeng

doi:10.1016/j.cclet.2023.109194

Cited by 11 publications

(5 citation statements)

References 72 publications

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“…Furthermore, the Young's modulus results of the composites (Figure S7) results provide similar evidences. [8] Consequently, the D-E loops of the composites containing the MOHI was measured (Figure S13, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…Polymer dielectric capacitors possess advantageous features such as high breakdown strength (E b ), low energy loss, and excellent processability. [1][2][3][4][5][6][7][8] These capacitors are extensively applied recent studies, scholars employed dielectric polymers sandwiched between wide-bandgap inorganic layers such as hexagonal boron nitride and aluminum oxide (Al 2 O 3 ) to increase the interfacial barrier height in the composite dielectrics. [14][15][16] Other researchers have introduced organic fillers such as molecular semiconductors and electron-deficient materials into polymers, which have been proven to introduce deeper electron traps and suppress leakage currents.…”

Section: Introductionmentioning

confidence: 99%

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Atomic‐Level Matching Metal‐Ion Organic Hybrid Interface to Enhance Energy Storage of Polymer‐Based Composite Dielectrics

Liu,

Chen,

et al. 2024

Advanced Materials

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In this work, a distinctive “metal‐ion organic hybrid interface” (MOHI) between polyimide (PI) and calcium niobate (CNO) nanosheets was designed. The metal ions in the MOHI could achieve atomic‐level matching not only with the inorganic CNO but also with the PI chains, forming uniform and strong chemical bonds. These results were demonstrated by experiment and theory calculations. Significantly, the MOHI reduced the free volume and introduced deep traps across the filler‐matrix interfacial area, thus suppressing the electric field distortion in PI‐based composite dielectrics. Consequently, PI‐based dielectric containing the MOHI exhibited excellent energy storage performance. The energy storage densities (Ue) of the composite dielectric reached 9.42 J cm−3 and 4.75 J cm−3 with energy storage efficiency (η) of 90% at 25 °C and 150 °C respectively, which are 2.6 and 11.6 times higher than those of pure PI. This study provides new ideas for polymer‐based composite dielectrics in high energy storage.This article is protected by copyright. All rights reserved

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Atomic‐Level Matching Metal‐Ion Organic Hybrid Interface to Enhance Energy Storage of Polymer‐Based Composite Dielectrics

Liu,

Chen,

et al. 2024

Advanced Materials

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“…Recently, polyhedral oligomeric silsesquioxane (POSS) has emerged as an ideal nanoscale inorganic particle that can be incorporated into epoxy resin or polyurethane to produce reinforced organic-inorganic hybrid superhydrophobic coatings. These coatings exhibit good thermal stability and mechanical strength, making them suitable for the conservation of bronze or iron artifacts [46,47]. Jia et al fabricated superhydrophobic coatings from POSS-based poly methylmethacrylate hybrids and investigated their protective performance on sandstone surfaces [48], which has certain implications for the protection of earthen sites.…”

Section: Water-repellent Properties Of Superhydrophobic Coatingsmentioning

confidence: 99%

Research Progress of Superhydrophobic Coatings in the Protection of Earthen Sites

Liu,

Li,

Zhou

et al. 2024

Coatings

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As an important part of human cultural heritage, earthen sites are subject to damage caused by a variety of environmental factors, such as cracking, weathering, and flooding. Due to the low mechanical strength of earthen site materials, especially in humid environments, they are susceptible to hazards like moisture penetration, freeze–thaw cycles, and biological invasion. Superhydrophobic coatings show promising potential in the protection of earthen sites, with key properties that include waterproof performance, breathability, robustness, and transparency. By exploring various material systems and preparation methods, the current state of research on the protection of building materials with superhydrophobic materials has been demonstrated, highlighting advantages in the corrosion resistance, self-cleaning, frost prevention, anti-scaling, and other aspects. At the same time, it also points out the challenges faced in the practical application of earthen site protection and the prospects for future research. These include enhancing the bonding strength between the coating and soil particles, improving durability and breathability, and developing large-scale, low-cost, and efficient coating construction techniques.

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“…It effectively bonds split, damaged, or fractured wooden elements as an adhesive [11]. Additionally, epoxy resin fills cracks and decayed voids in ancient timber members as a grouting material [12,13]. For successful repair and reinforcement, epoxy resins require room temperature curing and possess desirable properties such as good flowability, appropriate curing rates, and high mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

Applicability Evaluation of Modified Epoxy Resin in the Repair and Reinforcement of Ancient Building Timber Members

Han,

Wang,

Huang

et al. 2024

Forests

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To investigate the potential of modified epoxy resin for repairing and strengthening historical wooden structures, this study utilized polyurethane and silicone-modified epoxy resin as the base, alongside a polyamine curing agent. The resin mixture was cured at ambient temperature, resulting in the creation of ten unique epoxy resin systems. Investigation into the chemical structure and alterations to the glass transition temperature were conducted. The study conducted tests and characterization of viscosity, curing rate, mechanical properties, stress failure mode, hygrothermal aging resistance, and bonding properties. The results reveal that the curing degree of the two modified epoxy resins is high after being cured at room temperature, and the chemical structure and curing rate show insignificant changes. The range of the glass transition temperature for the modified epoxy resin is between 61.31 °C and 70.51 °C. The incorporation of polyurethane and silicone molecular chains into the epoxy resin cross-linking curing system enhances the toughness of the epoxy resin. The modified resin achieves a maximum elongation at break that is 5.18 times greater than that of the unmodified resin, along with a maximum tensile strength and a compressive strength that are 7.94 and 1.74 times, respectively, higher than those in the Chinese technical specifications for the maintenance and reinforcement of ancient wooden structures. The increase in toughness changes the failure mode of the cured epoxy resin. The modified epoxy resin exhibits great bonding ability to aged wood, with a shear strength of up to 9.6 MPa along the grain. As a result, the modified epoxy resin meets the requirements for the reinforcement and repair of the timber members of ancient buildings.

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Application of epoxy resin in cultural relics protection

Cited by 11 publications

References 72 publications

Atomic‐Level Matching Metal‐Ion Organic Hybrid Interface to Enhance Energy Storage of Polymer‐Based Composite Dielectrics

Atomic‐Level Matching Metal‐Ion Organic Hybrid Interface to Enhance Energy Storage of Polymer‐Based Composite Dielectrics

Research Progress of Superhydrophobic Coatings in the Protection of Earthen Sites

Applicability Evaluation of Modified Epoxy Resin in the Repair and Reinforcement of Ancient Building Timber Members

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