Enhanced cluster order–disorder transition-induced dilatancy in silane-functionalized nanosilica colloids

Katiyar, Ajay; Nandi, Tandra; Katiyar, Priyanka; Dhar, Purbarun; Prasad, N. Eswara

doi:10.1039/c8sm02406e

Cited by 6 publications

(3 citation statements)

References 31 publications

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“…The nSiO 2 and s-f-nSiO 2 are utilized to fabricate highquality STF according to the previous protocol. 30 In short, the required amount (5 to 25 wt%) of nSiO 2 and s-f-nSiO 2 are mixed into PEG 400 individually by using the mechanical stirrer for making two different STFs. The ethanol (an intermediate solvent) is used in the ratio of 5:1 during the mixing process to minimize surface tension and viscosity of the solution.…”

Section: Synthesis Of Shear Thickening Fluidmentioning

confidence: 99%

Impact behavior of aminosilane functionalized nanosilica based shear thickening fluid impregnated Kevlar fabrics

Katiyar

Nandi

Prasad

2021

J of Applied Polymer Sci

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In the present work, two types of shear thickening fluids have been synthesized by using neat and aminosilane functionalized silica nanoparticles and their viscosity curves have been obtained by the rheometer. Based on the values of peak viscosity of synthesized shear thickening fluids, the surface functionalized nanosilica based shear thickening fluid has been chosen as a best candidate due to the high viscosity for impregnation into the neat Kevlar of different layers viz. four (04) and eight (08) layers for velocity impact study. The experimental investigations reveal high energy absorption of shear thickening fluid impregnated Kevlar as compared to the neat Kevlar. The maximum energy absorption 62 J is achieved corresponding to the initial velocity 154 mÁs −1 for 08 layers shear thickening fluid impregnated Kevlar specimen. The data have also been analytically determined and validated with the experimental data. The experimental data have good agreement with the analytical data within the accuracy of around 15 to 20%. The present findings can have significant inferences towards the fabrication of shear thickening fluids using nanomaterials for numerous applications such as soft armors, dampers, nanofinishing and so forth.

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Section: Synthesis Of Shear Thickening Fluidmentioning

confidence: 99%

Impact behavior of aminosilane functionalized nanosilica based shear thickening fluid impregnated Kevlar fabrics

Katiyar

Nandi

Prasad

2021

J of Applied Polymer Sci

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“…The h-STFs are prepared by dispersing nanomaterials (Graphene and CNT) in various proportions of nSiO 2 in PEG 400 as reported in previous protocol [31]. In brief, the necessary proportions of CNT, Gr (0.5% of nSiO 2 concentration) and nSiO 2 (5 to 25 wt.%) are mixed into PEG 400 independently with the mechanical stirrer for 30 min at a speed of 1200 to 1500 rpm for making two variants of h-STFs.…”

Section: Synthesis Of H-stfmentioning

confidence: 99%

Energy absorption of graphene and CNT infused hybrid shear thickening fluid embedded textile fabrics

2021

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In the present work, two most important hybrid shear thickening fluids (STFs) are synthesized and embedded into the untreated Kevlar (04 and 08 layers) to promote the impact performance. The experiments are performed to investigate the various impact parameters such as ballistic limits, residual velocities, energy absorption, etc. of different samples (untreated Kevlar and CNT & Graphene infused hybrid STF treated Kevlar). The maximum energy absorption is found to be about 66 J corresponding to the 152.3 m/s initial velocity for 08 layered Graphene hybrid STF treated Kevlar sample, which shows graphene as the best candidate to promote ballistic protection compared to CNT. The results reveal a higher impact performance of Graphene hybrid STF treated samples compared to CNT hybrid STF treated and untreated samples. The experimental data are also validated with the theoretical data and good compliance within around 20% accuracy is found between the data. The present findings can have potential for several applications like soft armor, stab resistance, damper, etc.

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“…Therefore, it is necessary to modify the surface of silica. Katiyar et al 29 used 3-(aminopropyl) triethoxysilane (APTES) to functionalize silica. The functionalized colloids showed greatly enhanced shear-thickening properties and exhibited an improved dynamic response with enhanced elastic behavior under varying strain and frequency conditions.…”

Section: Introductionmentioning

confidence: 99%

Construction of nano-silica particle clusters and their effects on the shear thickening properties of liquids

Zhang,

Zheng,

Pan

et al. 2024

Soft Matter

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Enhanced cluster order–disorder transition-induced dilatancy in silane-functionalized nanosilica colloids

Abstract: Herein, we report that s-f-n-Si based STFs demonstrates high energy absorption capability and high shear thickening performance as compared to the n-Si based STFs.

Cited by 6 publications

References 31 publications

Impact behavior of aminosilane functionalized nanosilica based shear thickening fluid impregnated Kevlar fabrics

Impact behavior of aminosilane functionalized nanosilica based shear thickening fluid impregnated Kevlar fabrics

Energy absorption of graphene and CNT infused hybrid shear thickening fluid embedded textile fabrics

Construction of nano-silica particle clusters and their effects on the shear thickening properties of liquids

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