Excellent flexibility and stab-resistance on pangolin-inspired scale-like structure composite for versatile protection

Liu, Qing; Mao, Haiwen; Niu, Li; Chen, Fengxiang; Ma, Pibo

doi:10.1016/j.coco.2022.101266

Cited by 15 publications

(9 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In rock-cutting tools or tunnelboring machine applications, bioinspired surface modifications based on the properties of animal skins or plant surfaces have been investigated to reduce friction between the cutting tool and the tunnel surface, leading to greater mechanical traction, smoother excavation, and reduced tool wear. Moreover, features like anti-sticking properties for drilling the soft coal or earth [41,260], reducing sticking of drilling-breaks [41,[261][262][263][264][265], reducing soil wear and adherence [41,259,[266][267][268], self-cleaning [25,73,204,269,270], selfsharpening [271][272][273], self-lubricating [76,138,142,144], self-cooling [274], erosion protection (dry and slurry) [24,211,275,276], increased flexibility [24,277], reducing tool-chip friction [278], decreasing contact length between tool and chip [263,278], changing chip flow direction, improving adhesion resistance [88,266], stabilizing the built-up edge, lowering adhesive wear between tool and chip [105], etc., are shown to be attainable with specific biomimetic surface designs on machining/cutting tools. Additionally, some studies have suggested that a synergistic approach of solid lubricant and the bioinspired textures on tools (turning, etc.)…”

Section: Bioinspired Design Of Tools For Cutting or Machiningmentioning

confidence: 99%

Bioinspired and Multifunctional Tribological Materials for Sliding, Erosive, Machining, and Energy-Absorbing Conditions: A Review

Kumar,

Rezapourian,

Rahmani

et al. 2024

Biomimetics

View full text Add to dashboard Cite

Friction, wear, and the consequent energy dissipation pose significant challenges in systems with moving components, spanning various domains, including nanoelectromechanical systems (NEMS/MEMS) and bio-MEMS (microrobots), hip prostheses (biomaterials), offshore wind and hydro turbines, space vehicles, solar mirrors for photovoltaics, triboelectric generators, etc. Nature-inspired bionic surfaces offer valuable examples of effective texturing strategies, encompassing various geometric and topological approaches tailored to mitigate frictional effects and related functionalities in various scenarios. By employing biomimetic surface modifications, for example, roughness tailoring, multifunctionality of the system can be generated to efficiently reduce friction and wear, enhance load-bearing capacity, improve self-adaptiveness in different environments, improve chemical interactions, facilitate biological interactions, etc. However, the full potential of bioinspired texturing remains untapped due to the limited mechanistic understanding of functional aspects in tribological/biotribological settings. The current review extends to surface engineering and provides a comprehensive and critical assessment of bioinspired texturing that exhibits sustainable synergy between tribology and biology. The successful evolving examples from nature for surface/tribological solutions that can efficiently solve complex tribological problems in both dry and lubricated contact situations are comprehensively discussed. The review encompasses four major wear conditions: sliding, solid-particle erosion, machining or cutting, and impact (energy absorbing). Furthermore, it explores how topographies and their design parameters can provide tailored responses (multifunctionality) under specified tribological conditions. Additionally, an interdisciplinary perspective on the future potential of bioinspired materials and structures with enhanced wear resistance is presented.

show abstract

Section: Bioinspired Design Of Tools For Cutting or Machiningmentioning

confidence: 99%

Bioinspired and Multifunctional Tribological Materials for Sliding, Erosive, Machining, and Energy-Absorbing Conditions: A Review

Kumar,

Rezapourian,

Rahmani

et al. 2024

Biomimetics

View full text Add to dashboard Cite

show abstract

“…Liu et al prepared a scale-like structure composite from a knitted fabric reinforced with resin, inspired by pangolin scales [ 38 ]. Figure 4 depicts the pangolin with its scales ( Figure 4 a), the idea of reinforcing the double-layer scale-like knitted fabric with Surlyn and polyethylene (PE) resins only at the scales, while the lower fabric parts stay untreated, the measured hardness values compared to real pangolin scales, and an untreated scale-like knitted fabric from front and back ( Figure 4 d–g).…”

Section: New Shapes and Polymersmentioning

confidence: 99%

“…( f ) Optical image on the back of SLKF and ( g ) enlarged view. Reprinted from [ 38 ], Copyright (2022), with permission from Elsevier.…”

Section: Figurementioning

confidence: 99%

Stab-Resistant Polymers—Recent Developments in Materials and Structures

Panneke

Ehrmann

2023

Polymers

View full text Add to dashboard Cite

Stab-resistant garments have been used for centuries, utilizing metals, paper, or polymeric structures, often inspired by natural structures such as scales. Nowadays, stab-resistant vests or vest inserts are used by police and security personnel, but also by bus drivers, ambulance officers, and other people who are empirically often attacked on duty. Since stab protection garments are often heavy and thus uncomfortable and not well accepted, whether in the form of chain-mail or metal inserts in protective vests, researchers are striving to find lightweight, drapable alternatives, often based on polymeric materials. These research attempts have recently focused on textile fabrics, mostly with impregnation by shear-thickening fluids (STFs) or ceramic coatings, as well as on lightweight composites. The first studies on 3D printed polymeric objects with tailored shapes, as well as theoretical investigations of the stab-protective effect of different materials, have been published throughout the last years. Here, we discuss different measurement methods, including dynamic and quasistatic methods, and correlations of stab-resistance with other physical properties, before we give an overview of recent developments of stab-resistant polymers, using different materials/material combinations and structures.

show abstract

“…Another study demonstrated, that for various knitted fabrics coated with PU, the elongation in the wale direction as well as breaking forces in the course and wale directions correlated with the results of the knitted fabrics. 33 Recently, the stab-resistance of different weft-knitted fabrics with a flexible Surlyn resin 34,35 for flexible and lightweight personal protection products was investigated. In another work, silicone rubber was used in warp-knitted spacer fabrics, resulting in composites suitable for the field of buffer protection.…”

Section: Introductionmentioning

confidence: 99%

Tensile properties of flexible composites with knitted reinforcements from various yarn materials

Schwaiger,

Roeper (Röper),

Wolfahrt

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

The tensile behavior of a flexible epoxy resin reinforced with knitted reinforcements from various fiber materials was comprehensively studied in the wale and course direction. By measuring dry yarns, temperature‐treated yarns, dry knitted fabrics and flexible composites, the effect of the fiber material and the knitted fabric on the tensile properties was analyzed. The interlock knit structure strongly affected the deformation behavior of the flexible composites which differed significantly from the dry knitted fabrics. The deformation behavior of the flexible composites was monitored using digital image correlation which revealed the formation of cracks and high local strain differences in the course direction for all fiber materials. This was linked to fiber‐matrix debonding by scanning electron microscope observations. In the wale direction, the deformation of the knitted structure under tensile load led to plastic deformation of the matrix material. Overall, with yarns from recycled thermoplastic fibers, a higher maximum stress and strain at break was achieved compared to bio‐based fibers. However, irreversible damage occurred for all fiber materials at similar strain values.Highlights Tensile tests on yarns, knitted fabrics and flexible composites. Investigation of the effect of fiber material on mechanical properties. High local strain differences in composites due to knitted structure. Fiber‐matrix debonding in course direction. Plastic deformation of the matrix material in the wale direction.

show abstract

Excellent flexibility and stab-resistance on pangolin-inspired scale-like structure composite for versatile protection

Cited by 15 publications

References 31 publications

Bioinspired and Multifunctional Tribological Materials for Sliding, Erosive, Machining, and Energy-Absorbing Conditions: A Review

Bioinspired and Multifunctional Tribological Materials for Sliding, Erosive, Machining, and Energy-Absorbing Conditions: A Review

Stab-Resistant Polymers—Recent Developments in Materials and Structures

Tensile properties of flexible composites with knitted reinforcements from various yarn materials

Contact Info

Product

Resources

About