Robust and highly resilient waterborne polyurethane-based composite aerogels prepared by blending with aramid nanofibers

He, Ran; Xie, Chunjie; Chen, Yuexi; Guo, Zhao‐Xia; Guo, Baohua; Tuo, Xinlin

doi:10.1016/j.compscitech.2022.109622

Cited by 26 publications

(11 citation statements)

References 50 publications

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“…polyurethane [48][49][50], poly(vinyl alcohol) (PVA) [51], polysulphone [52], polyvinyl chloride [53], and polyamide [54]. Guan et al [53] found that compared with neat PVA, the toughness and tensile strength of PVA nanocomposites with 5 wt % loading of ANFs increased by 149% and 79%, respectively.…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Highly improved UV-shielding and mechanical properties of UV-curable epoxy acrylate nanocomposites by incorporating functionalized aramid nanofibers

Wang

Luo

Pan

et al. 2022

Preprint

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Introducing nanofillers into UV-curable coatings can not only effectively improve the performance of the coating but also impart new functions to the film. Herein, methacrylate-functionalized aramid nanofibers (mANFs) were constructed by a bottom-up approach, and their influence on the performance of UV-curable epoxy acrylate (EA) coatings was investigated. The microstructure of the EA/mANF nanocomposite was studied using X-ray Diffraction and Transmission Electron Microscopy (TEM), which confirmed the homogeneous distribution of mANFs in the matrix. The effect of mANFs on the curing kinetics was investigated. The result showed that the photopolymerization rate and final C = C bond conversion would not be adversely affected until more than 0.1 wt % mANFs were added. The UV–vis analyses showed that the EA/mANF films maintained high transmittance in the visible light region and exhibited improved UV-shielding performance. The mechanical characteristics of EA/mANF films were significantly improved by mANFs because of strong interactions such as π–π interactions, hydrogen bonds, and chemical bonds between the matrix and mANFs. For the nanocomposite containing 0.025 wt % mANFs, tensile strength and strain at break increased by 53% and 446%, respectively, compared to neat EA. Thus, the introduction of mANFs considerably improved the mechanical performance of UV-curable EA films and expanded their application in the field of UV shielding.

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Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Highly improved UV-shielding and mechanical properties of UV-curable epoxy acrylate nanocomposites by incorporating functionalized aramid nanofibers

Wang

Luo

Pan

et al. 2022

Preprint

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“…However, up to now, there are almost no research studies on how to construct the 3D ANF/BNNS thermal conducive skeleton. Inspired by previous studies in which ANF has been successfully used for the construction of a 3D porous skeleton, − we believe it is an alternative and easier way to use ANF as a skeleton material to construct a highly anisotropic 3D ordered BNNS structure for the preparation of highly thermal conductive polymer composites.…”

Section: Introductionmentioning

confidence: 95%

Self-Stacked 3D Anisotropic BNNS Network Guided by Para-Aramid Nanofibers for Highly Thermal Conductive Dielectric Nanocomposites

Miao

Xie

et al. 2023

ACS Appl. Mater. Interfaces

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The enhancement of the heat-dissipation property of polymerbased composites is of great practical interest in modern electronics. Recently, the construction of a three-dimensional (3D) thermal pathway network structure for composites has become an attractive way. However, for most reported high thermal conductive composites, excellent properties are achieved at a high filler loading and the building of a 3D network structure usually requires complex steps, which greatly restrict the large-scale preparation and application of high thermal conductive polymer-based materials. Herein, utilizing the framework-forming characteristic of polymerization-induced para-aramid nanofibers (PANF) and the high thermal conductivity of hexagonal boron nitride nanosheets (BNNS), a 3D-laminated PANF-supported BNNS aerogel was successfully prepared via a simple vacuum-assisted self-stacking method, which could be used as a thermal conductive skeleton for epoxy resin (EP). The obtained PANF-BNNS/EP nanocomposite exhibits a high thermal conductivity of 3.66 W m −1 K −1 at only 13.2 vol % BNNS loading. The effectiveness of the heat conduction path was proved by finite element analysis. The PANF-BNNS/EP nanocomposite shows outstanding practical thermal management capability, excellent thermal stability, low dielectric constant, and dielectric loss, making it a reliable material for electronic packaging applications. This work also offers a potential and promotable strategy for the easy manufacture of 3D anisotropic high-efficiency thermal conductive network structures.

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“…11 In order to avoid such toxic organic solvents, water-borne polyurethanes (WBPUs) have been recently used to fabricate PU nanofibers. 12 A water-based PU emulsion is environmentally friendly compared with traditional PU, and they are cost-effective, non-flammable, and non-toxic. 13 Polyvinyl alcohol (PVA) and polyethylene oxide (PEO) are the most preferred carrier polymers for the fabrication of PU nanofibers using water as the spinning solvent.…”

Section: Introductionmentioning

confidence: 99%

Water-based eco-friendly fabrication of physicochemically crosslinked and highly wettable PU-rich electrospun PU/PEO nanofiber composites with exceptional chemical and thermal stability

Ohsawa¹,

Mayakrishnan²,

Yan³

et al. 2023

Green Chem.

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Robust and highly resilient waterborne polyurethane-based composite aerogels prepared by blending with aramid nanofibers

Cited by 26 publications

References 50 publications

WITHDRAWN: Highly improved UV-shielding and mechanical properties of UV-curable epoxy acrylate nanocomposites by incorporating functionalized aramid nanofibers

WITHDRAWN: Highly improved UV-shielding and mechanical properties of UV-curable epoxy acrylate nanocomposites by incorporating functionalized aramid nanofibers

Self-Stacked 3D Anisotropic BNNS Network Guided by Para-Aramid Nanofibers for Highly Thermal Conductive Dielectric Nanocomposites

Water-based eco-friendly fabrication of physicochemically crosslinked and highly wettable PU-rich electrospun PU/PEO nanofiber composites with exceptional chemical and thermal stability

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