Effect of Fiber Characteristics on the Structure and Properties of Quartz Fiber Felt Reinforced Silica-Polybenzoxazine Aerogel Composites DOI Creative Commons

Lanfang Liu,

Liangjun Li,

Yijie Hu

et al.

Gels, Journal Year: 2024, Volume and Issue: 10(10), P. 613 - 613

Published: Sept. 24, 2024

Fiber-reinforced aerogel composites are widely used for thermal protection. The properties of the fibers play a critical role in determining structure and final composite. However, effects fiber’s characteristics on composite have rarely been studied. Herein, we prepared quartz fiber felt-reinforced silica-polybenzoxazine (QF/PBSAs) with different diameters using simple copolymerization process ambient pressure drying method. reasons diameter were investigated. results showed that pore was affected by diameter, which led to significant changes mechanical behavior insulation performance. At room temperature, density found be main factors influencing conductivity composites. elevated temperatures, radiative (λr) plays dominant role, reducing suppressed λr, thus decreasing conductivity. When QF/PBSAs exposed 1200 °C butane flame, PBS pyrolyzed, pyrolysis gas carried away large amount heat formed barrier interfacial layer, at time λr jointly determined backside temperature this study can provide valuable guidance application polybenzoxazine field

Language: Английский

Characteristics of Polybenzoxazine Aerogels as Thermal Insulation and Flame-Retardant Materials DOI Creative Commons
Shakila Parveen Asrafali, Thirukumaran Periyasamy, Jaewoong Lee

et al.

Gels, Journal Year: 2025, Volume and Issue: 11(2), P. 121 - 121

Published: Feb. 6, 2025

Polybenzoxazine-based aerogels are a unique class of materials that combine the desirable properties aerogels-such as low density, high porosity, and excellent thermal insulation-with outstanding characteristics polybenzoxazines-such stability, water absorption, superior mechanical strength. Polybenzoxazines type thermosetting polymer derived from benzoxazine monomers. Several features polybenzoxazines can be retained within synthesized through them. The resistance polybenzoxazines, which withstand temperatures above 200-300 °C, makes their aerogel able to extreme environments. inherent structure rich in aromatic rings nitrogen oxygen atoms, imparts flame-retardant property. Their highly crosslinked provides solvents, acids, bases. Above all, molecular design flexibility, physical, mechanical, tubed suit specific applications. In this review, synthesis polybenzoxazine aerogels, including various steps such monomer synthesis, gel formation, solvent exchange drying, finally curing discussed detail. application these insulation is given importance. challenges future prospects further enhancing expanding utility also summarized.

Language: Английский

Citations

0
Strong, Flame Retardant and Thermally Insulating Polybenzoxazine-Silica Aerogels Fabricated Via Chemical Liquid Deposition Using Eco-Friendly Water-Ethanol Solvent DOI
Ruixiang Liu, Yun Liu, Xuemei Yan

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Preparation and Properties of Basalt Fiber‐Reinforced Aqueous Polybenzoxazine Composite Aerogels Based on One‐Step Freeze‐Drying Method DOI

Pin Long,

Zhaorun Hou,

Jinbo Cheng

et al.

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 22, 2024

ABSTRACT Polybenzoxazine (PBa) aerogels have gained much attention as a fire‐retardant material because of their flexible molecular design and excellent mechanical properties. Incorporation inorganic fibers into PBa using simple effective method seems attractive yet challenging. Herein, we report unique for the one‐step preparation basalt fiber (BF) reinforced composite by freeze‐drying carboxymethyl cellulose (CMC) dispersion carrier. Aqueous benzoxazine (Ba) monomer was used matrix phosphoric acid polymerization catalyst, while uniform BF achieved blending with CMC. The results indicate that PBa/CMC/BF aerogel reveals layered microstructure dispersed between layers. And achieves low volume shrinkage (1.11%), strong strength (compressive stress 1.73 MPa at 60% compressive strain). Additionally, TGA analysis higher initial decomposition temperature (> 200°C) residual mass 48 wt%) in nitrogen atmosphere. Excellent flame retardancy is due to introduction nonflammable BF: content rises, its peak heat release rate decreases 92.5%, average 86.6%, total smoke 76.7%. In combustion tests, self‐extinguishes within 0.5 s. After hydrophobic modification, water contact angle greater than 135°, 3 exhibits typical “silver mirror phenomenon” water. This study presents straightforward rapid constructing lightweight, retardant, hydrophobic, high‐strength fiber‐reinforced aerogel, promising applications aerospace sector.

Language: Английский

Citations

1
Effect of Fiber Characteristics on the Structure and Properties of Quartz Fiber Felt Reinforced Silica-Polybenzoxazine Aerogel Composites DOI Creative Commons

Lanfang Liu,

Liangjun Li,

Yijie Hu

et al.

Gels, Journal Year: 2024, Volume and Issue: 10(10), P. 613 - 613

Published: Sept. 24, 2024

Fiber-reinforced aerogel composites are widely used for thermal protection. The properties of the fibers play a critical role in determining structure and final composite. However, effects fiber’s characteristics on composite have rarely been studied. Herein, we prepared quartz fiber felt-reinforced silica-polybenzoxazine (QF/PBSAs) with different diameters using simple copolymerization process ambient pressure drying method. reasons diameter were investigated. results showed that pore was affected by diameter, which led to significant changes mechanical behavior insulation performance. At room temperature, density found be main factors influencing conductivity composites. elevated temperatures, radiative (λr) plays dominant role, reducing suppressed λr, thus decreasing conductivity. When QF/PBSAs exposed 1200 °C butane flame, PBS pyrolyzed, pyrolysis gas carried away large amount heat formed barrier interfacial layer, at time λr jointly determined backside temperature this study can provide valuable guidance application polybenzoxazine field

Language: Английский

Citations

0