Supercritical carbon dioxide assisted impregnation and graft of polyamide acid into aramid fiber for formation of polar interface

Li, Yang; Xie, Gaoyi; Li, Rong; Wu, Yujie; Chen, Changqin; Luo, Zhu

doi:10.1016/j.jmrt.2022.09.030

Cited by 11 publications

(24 citation statements)

References 31 publications

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“…(iv) The surface examination of (a) the pristine AFs, (b) AFs altered with only ScCO 2 , and (c) AFs treated with ECH under ScCO 2 . Reused from 45,46,48,49 with permission, copyright 2022 Elsevier, 2014 RSC, 2019 MDPI, and 2019 RSC.…”

Section: Grafting Of Polymeric Monomer Via Scco2mentioning

confidence: 99%

Recent advancement in surface modification of aramid fiber assisted by supercritical carbon dioxide

Patadiya,

Chougale,

Naebe

et al. 2023

Polymers for Advanced Techs

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The exceptional mechanical properties of aramid fibers make them a popular choice for high‐performance materials; despite that, their potential is limited due to their surface properties bonding energy and interfacial bonding strength with matrix materials. The enhanced resistance of poly‐aramid fibers (AFs) to severe surroundings and improved interlaminar adhesion in sandwich compounds with admirable mechanical characteristics are becoming a great challenge for various chemical and physical surface treatment techniques. Supercritical carbon dioxide (scCO2) is a popular and sustainable approach that can effectively bond and homogeneously deposit functional groups or nanoparticles and exhibit the excellent performance of fibber modification. This article examines aramid fibers' surface modification advancements using scCO2‐assisted techniques, including monomer grafting, impregnation, and functionalization with various functional groups and nanoparticles. Additionally, the article discusses the challenges faced in scCO2‐assisted aramid fiber modification and what the future holds for this technology.

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Section: Grafting Of Polymeric Monomer Via Scco2mentioning

confidence: 99%

Recent advancement in surface modification of aramid fiber assisted by supercritical carbon dioxide

Patadiya,

Chougale,

Naebe

et al. 2023

Polymers for Advanced Techs

View full text Add to dashboard Cite

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“…Therefore, fiber surface modification improves the interfacial bonding properties with the resin matrix 7,8 . Depending on different modification principles, the commonly used modification methods include plasma treatment, 9,10 surface coating treatment, 11,12 surface grafting, 13,14 and acid–base etching 15,16 . High‐energy particle treatment requires reasonable process control, and surface etching often causes a loss of fiber strength.…”

Section: Introductionmentioning

confidence: 99%

“…principles, the commonly used modification methods include plasma treatment, 9,10 surface coating treatment, 11,12 surface grafting, 13,14 and acid-base etching. 15,16 High-energy particle treatment requires reasonable process control, and surface etching often causes a loss of fiber strength.…”

mentioning

confidence: 99%

Mechanical properties of modified aramid three‐dimensional braided composites

Li,

Shi,

Xing

et al. 2023

Polymers for Advanced Techs

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Three‐dimensional (3D) braided composites have good integrity and high stability, but aramid fiber (AF) has an inert surface and poor interfacial bonding with resin, which affects the mechanical properties of aramid 3D braided composites and limits their development. This paper used catechol/pyrogallol polyamine (CA/PGPA) to modify the AF. The effects of different mass fraction ratios of CA/PGPA and different reaction temperatures on the surface properties of AF and the mechanical properties of 3D braided composites were investigated. The results showed that after the CA/PGPA modification, fiber surface oxygen‐containing groups increased, the roughness became more extensive, the fiber strength increased, and the interfacial shear strength increased. When AF‐CAPG‐II‐40°C, the mechanical properties of the 3D braided composites were improved most significantly. Compared with unmodified composites, the bending modulus was increased by 70%, the compression modulus by 124%, and the shear strength by 55.7%. The epoxy resin modification was carried out based on AF‐CAPG‐II‐40°C, and when the mass fraction of aramid nanofiber/graphene nanoparticle (ANF/G) was 0.7 wt%, 3D braided composites exhibited satisfactory mechanical properties. The bending modulus, compression modulus, and shear strength were increased by 15.3%, 23.3%, and 25.7%, respectively, compared with AF‐CAPG‐II‐40°C.

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“…21,22 However, aramid fiber is a rigid material and the surface of aramid fiber is chemically inert and poorly combined with the matrix material. [23][24][25] When subjected to alternating stress, aramid fiber will produce friction with rubber molecular chains and particles in the rubber matrix, causing a lot of heat. Therefore, aramid fiber is necessary to be modified in order to reduce the dynamic heat generation of rubber composites.…”

Section: Introductionmentioning

confidence: 99%

“…The properties of rubber composites can be improved by filling only a small amount of aramid fiber 21,22 . However, aramid fiber is a rigid material and the surface of aramid fiber is chemically inert and poorly combined with the matrix material 23–25 . When subjected to alternating stress, aramid fiber will produce friction with rubber molecular chains and particles in the rubber matrix, causing a lot of heat.…”

Section: Introductionmentioning

confidence: 99%

Hybrid enhancement of silica and aramid pulp on improving performance and reducing dynamic heat generation of natural rubber composites

et al. 2023

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The composites with excellent mechanical, low rolling resistance, and low heat build‐up are the potential materials for preparing green tires. In this study, we prepared silica‐natural rubber latex (silica‐NRL) masterbatch, which improved the processing and dispersion properties of silica in the natural rubber, proved by the rheological properties of composites. Furthermore, the idea of partial replacement of silica with low content modified aramid pulp (AP) for preparing hybrid enhanced natural rubber with high mechanical properties and low heat build‐up was put forward and evaluated the feasibility of this strategy. We find that replacing 5 phr silica with 1 phr AP, the performances of the rubber composites were all superior to the composites with only filled 50 phr silica, and replacing 10 phr silica with 2 phr AP, the mechanical and fatigue property was improved remarkably and dynamic heat generation was reduced the most at same time. The strategy of preparing silica‐NRL masterbatch and partial replacement of silica with AP provides a novel reference for the preparation of low heat build‐up green tire.

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Supercritical carbon dioxide assisted impregnation and graft of polyamide acid into aramid fiber for formation of polar interface

Cited by 11 publications

References 31 publications

Recent advancement in surface modification of aramid fiber assisted by supercritical carbon dioxide

Recent advancement in surface modification of aramid fiber assisted by supercritical carbon dioxide

Mechanical properties of modified aramid three‐dimensional braided composites

Hybrid enhancement of silica and aramid pulp on improving performance and reducing dynamic heat generation of natural rubber composites

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