Mechanical characterization of electrospun boron nitride nanotube-reinforced polymer nanocomposite microfibers

Anjum, Nasim; Alsmairat, Ohood; Liu, Zihan; Park, Cheol; Fay, Catharine C.; Ke, Changhong

doi:10.1557/s43578-022-00653-8

Cited by 4 publications

(3 citation statements)

References 34 publications

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“…Notably, the property enhancement increases per unit concentration of fillers are noticeably higher for lower nanotube concentrations. The decrease in the reinforcement effectiveness at higher nanotube concentrations can be attributed to the hard-to-avoid nanotube agglomeration inside the matrix that is more egregious at higher nanotube concentrations. , …”

Section: Resultsmentioning

confidence: 99%

“…The results show the shear-lag effect in the interfacial stress transfer, which has been observed in nanotube-reinforced polymer nanocomposites. 46,47 In contrast, little Raman peak frequency change is observed at Point 3. The results show that nanotubes at Point 1 are strained ahead of those at Point 2, but both experience a similar level of maximum tensile strain, while nanotubes at Point 3 are not noticeably strained.…”

Section: In Situ Raman Micromechanical Characterizationmentioning

confidence: 94%

“…The decrease in the reinforcement effectiveness at higher nanotube concentrations can be attributed to the hard-to-avoid nanotube agglomeration inside the matrix that is more egregious at higher nanotube concentrations. 46,47 Detailed SEM characterization of the nanotube conformation inside the ceramic nanocomposite was conducted to understand the failure mode and the reinforcing mechanism of the nanocomposite. Figure 1d shows that the dispersed BNNTs are in good contact with the ceramic grain surface with some nanotubes bridging across pores and/or multiple ceramic grains.…”

Section: Bulk Mechanical Properties Of Bnnt-silica Nanocompositesmentioning

confidence: 99%

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Boron Nitride Nanotubes Toughen Silica Ceramics

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Boron nitride nanotubes (BNNTs) are promising reinforcing fillers for ceramics because of their extraordinary structural and mechanical properties and thermal stability, but their reinforcing mechanisms remain elusive. Here, we investigate how BNNTs reinforce silica nanocomposites by quantifying their bulk and interfacial mechanical properties using in situ Raman micromechanical characterization techniques and microstructural analysis. Our studies reveal that the incorporation of small amounts of BNNTs (0.1 to 0.5 wt %) substantially increases the flexural strength (∼51 to ∼153%) and fracture toughness (∼54 to ∼167%) of silica. The effective interfacial shear stress in the bulk BNNTsilica nanocomposite follows a shear-lag model, with a maximum value of ∼92 MPa. The microstructural analysis reveals that incorporating BNNTs in silica has a prominent influence on its crystallization, with a noticeable increase in porosity and a decrease in crystal size and lattice strain. The collective microstructural changes substantially contribute to the bulk mechanical properties of the BNNT-silica nanocomposite. These findings provide insights into the reinforcement mechanism of BNNTs in ceramics and contribute to the optimal design of light, strong, tough, and durable ceramic materials.

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Section: Resultsmentioning

confidence: 99%

Section: In Situ Raman Micromechanical Characterizationmentioning

confidence: 94%

Section: Bulk Mechanical Properties Of Bnnt-silica Nanocompositesmentioning

confidence: 99%

See 1 more Smart Citation

Boron Nitride Nanotubes Toughen Silica Ceramics

Anjum,

Wang,

Gou

et al. 2024

ACS Appl. Eng. Mater.

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Spectroscopic and microscopic investigations of functionalized polymer nanocomposites

Punetha,

Pathak,

Bhatt

et al. 2024

Advances in Functionalized Polymer Nanocomposites

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Recent advances and perspective on boron nitride nanotubes: From synthesis to applications

Jakubinek

Kim

et al. 2022

Journal of Materials Research

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Boron nitride nanotubes (BNNTs) are emerging nanomaterials with analogous structures and similarly impressive mechanical properties to carbon nanotubes (CNTs), but unique chemistry and complimentary multifunctional properties, including higher thermal stability, electrical insulation, optical transparency, neutron absorption capability, and piezoelectricity. Over the past decade, advances in synthesis have made BNNTs more broadly accessible to the nanomaterials and other research communities, removing a major barrier to their utilization and research. Therefore, the field is poised to grow rapidly and see the emergence of BNNT applications ranging from electronics to aerospace materials. A key challenge, that is being gradually overcome, is the development of manufacturing processes to make “neat” BNNT materials. This overview highlights the history and current status of the field, providing both an introduction to this Focus Issue—BNNTs: Synthesis to Applications—as well as a perspective on advances, challenges, and opportunities for this emerging material. Graphical abstract

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Mechanical characterization of electrospun boron nitride nanotube-reinforced polymer nanocomposite microfibers

Cited by 4 publications

References 34 publications

Boron Nitride Nanotubes Toughen Silica Ceramics

Boron Nitride Nanotubes Toughen Silica Ceramics

Spectroscopic and microscopic investigations of functionalized polymer nanocomposites

Recent advances and perspective on boron nitride nanotubes: From synthesis to applications

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