Enhancing Thermo-Mechanical Properties of Epoxy Composites Using Fumed Silica with Different Surface Treatment

Kim, Kyung-Min; Kim, Hoon; Kim, Hyun‐Joong

doi:10.3390/polym13162691

Cited by 9 publications

(6 citation statements)

References 46 publications

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“…The observation is in line with previous studies, which suggest that merely a few percent volume fraction of fumed silica is able to form a three-dimensional network within the polymer composite 32 . Fumed silica, which has been reported as an inorganic filler to mechanically reinforce polymer matrixes 33 , 34 , may result in better structural stability of the structural scaffold against gravitational and capillary forces with less structural deformation during the drying process. To verify the mechanical reinforcement of the polymer matrix by adding fumed silica, we conducted a compressive test on non-porous films with different fumed silica content (PC and FSPC) (Fig.…”

Section: Resultsmentioning

confidence: 99%

Humidity-tolerant porous polymer coating for passive daytime radiative cooling

Hong,

Lee,

Jeon

et al. 2024

Nat Commun

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Coating building envelopes with a passive daytime radiative cooling (PDRC) material has attracted enormous attention as an alternative cooling technique with minimal energy consumption and carbon footprint. Despite the exceptional performance and scalability of porous polymer coating (PPC), achieving consistent performance over a wide range of drying environments remains a major challenge for its commercialization as a radiative cooling paint. Herein, we demonstrate the humidity vulnerability of PPC during the drying process and propose a simple strategy to greatly mitigate the issue. Specifically, we find that the solar reflectance of the PPC rapidly decreases with increasing humidity from 30% RH, and the PPC completely losses its PDRC ability at 45% RH and even become a solar-heating material at higher humidity. However, by adding a small amount of polymer reinforcement to the PPC, it maintains its PDRC performance up to 60% RH, resulting in a 950% increase in estimated areal coverage compared to PPC in the United States. This study sheds light on a crucial consistency issue that has thus far been rarely addressed, and offers engineering guidance to handle this fundamental threat to the development of dependable PDRC paint for industrial applications.

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Section: Resultsmentioning

confidence: 99%

Humidity-tolerant porous polymer coating for passive daytime radiative cooling

Hong,

Lee,

Jeon

et al. 2024

Nat Commun

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“…The larger particle size of FSNs reduces their production cost to 10 % of that of NS particles, facilitating their wide applications in anti-aging rubber applications 53 . Due to the use of nanoparticle chain aggregates as a basic unit 54,55 , fumed silica can be employed as fillers to improve the rheological properties of resins and coatings. To recapitulate, previous studies have demonstrated that NS plays a crucial role in increasing the bitumen's resistance to aging.…”

Section: Inhibitors Of Bitumen Agingmentioning

confidence: 99%

The Problem of Road Bitumen Technological Aging and Ways to Solve It: A Review

Donchenko,

Grynyshyn,

Prysiazhnyi

et al. 2024

ChChT

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This paper discusses the main features of technological aging of bitumen, in particular, the mechanisms and transformations that accompany this process. The main laboratory methods for modeling the above processes are considered. It is described how the technical essence of the methods has changed from the first developments to the present. A number of compounds that can be used as inhibitors of technological aging, including antioxidants and plasticizers, as well as some “natural” substances that have these properties, are presented.

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“…In recent years, much research has been reported on the improvement of the tensile strength, thermal stability and storage modulus of epoxy composites with the incorporation of fillers into the epoxy matrix. [17][18][19][20] When choosing fillers, various characteristics of filler particles need to be considered, such as their size, shape and aspect ratio, specific surface area (SSA), distribution and dispersion, as well as loading. 21 Today, most SMs are mainly composed of barium sulfate (BaSO 4 ) as the filler.…”

Section: Introductionmentioning

confidence: 99%

Thermo‐mechanical properties of epoxy composites filled with inorganic particulate fillers for robust solder mask application

Lim,

Jaafar,

Ishak

et al. 2024

Polymer International

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Filler components play a crucial role as thermo‐mechanical reinforcement to the epoxy‐based solder mask, ensuring effective insulation and passivation. This study investigates the impact of different inorganic filler types (talc, silica (SiO2), boron nitride (BN) and barium sulfate (BaSO4)) and loadings (5 and 15 wt%) on the tensile and thermal properties of the epoxy composites. The composites were blended, cast and thermally cured. Of these composites, only 15 wt% SiO2/epoxy composite exhibits notable increments in both tensile strength and modulus, surpassing unfilled epoxy by 11.65% and 31.9%, respectively. It also displays the highest elongation at break, supported by small particle size, high specific surface area and minimal void volume fraction. For thermal tests, the addition of all fillers increases the storage modulus in both glassy and rubbery regions, especially 15 wt% talc/epoxy composite with 30.09% increment at 25 °C. Additionally, all fillers raise the glass transition temperature (Tg), notably improving it by 9 °C in the 15 wt% BN/epoxy composite. Moreover, their inclusion generally enhances the onset decomposition temperature (Tonset) and reduces weight loss during decomposition. © 2024 Society of Chemical Industry.

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Enhancing Thermo-Mechanical Properties of Epoxy Composites Using Fumed Silica with Different Surface Treatment

Cited by 9 publications

References 46 publications

Humidity-tolerant porous polymer coating for passive daytime radiative cooling

Humidity-tolerant porous polymer coating for passive daytime radiative cooling

The Problem of Road Bitumen Technological Aging and Ways to Solve It: A Review

Thermo‐mechanical properties of epoxy composites filled with inorganic particulate fillers for robust solder mask application

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