Kevlar fibers reinforced straw wastes-polyethylene composites: Combining toughness, strength and self-extinguishing capabilities

Lu, Wenyu; Yu, Wenfan; Zhang, Baoxu; Dou, Xiaohang; Han, Xiangsheng; Cai, Houzhi

doi:10.1016/j.compositesb.2021.109117

Cited by 33 publications

(10 citation statements)

References 56 publications

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“…The peak at 1650 cm −1 was attributed to the C=O groups in amide 13 . As illustrated in Figure 2C, the peak at 1545 cm −1 assigned to the bending vibration of N‐H decreased significantly in AEP 21 . This phenomenon was also caused by the graft of ECH.…”

Section: Resultsmentioning

confidence: 89%

“…The characteristic peak at 3326 cm −1 belonged to the N‐H stretching vibrations in ANFs, which distinctly shifted to 3440 cm −1 in AEP. The shift after modification of ANFs may be due to the broke of hydrogen bonding 18,21,39 . The peak at 1650 cm −1 was attributed to the C=O groups in amide 13 .…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, ANFs have attracted more and more interest. After nanosizing, ANFs still maintain the original high strength characteristics of AFs, and a large number of studies using aramid fibers to enhance the strength of materials have been reported 19–22 …”

Section: Introductionmentioning

confidence: 99%

“…After nanosizing, ANFs still maintain the original high strength characteristics of AFs, and a large number of studies using aramid fibers to enhance the strength of materials have been reported. [19][20][21][22] However, it is worth noting that ANFs, like AFs, also suffer from the disadvantage of poor compatibility with other matrixes, so their applications are somewhat limited. 23 Many research has modified the surface of aramid fibers by chemical etching and grafting, plasma treatment, and ion sputtering, which improved their compatibility with other matrixes.…”

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confidence: 99%

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Surface modification of epichlorohydrin‐modified aramid nanofibers using ionic liquid to improve the fire safety and tensile strength of cotton fabrics

Wang

Feng

Piao

et al. 2022

Polymers for Advanced Techs

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In this article, flame‐retardant cotton fabric was prepared by a step‐by‐step dip‐coating method, in which flame retardants were introduced onto the surface of the cotton fabric by hydrogen bonding association and surface grafting reaction. First, the epichlorohydrin‐modified aramid nanofibers (AEP) were accumulated onto the surface of cotton fabric (Cot/AEP) through hydrogen bond association. Subsequently, the ionic liquid (IL) was grafted onto the surface of AEP to obtain Cot/AEP/IL. The fire safe performance of cotton fabrics was investigated by the limiting oxygen index test (LOI), vertical flammability test (VFT), and cone calorimeter test (CCT), and so forth. The LOI value of Cot/AEP/IL was as high as 29.5%. The VFT results showed that Cot/AEP/IL was self‐extinguishing rather than ignited, leaving a char length of 111 mm. The CCT results demonstrated that the peak heat release rate and total heat release of Cot/AEP/IL decreased by 42.5% and 58.8% compared with untreated cotton fabrics, respectively. The TG test showed that Cot/AEP/IL had more residues left than untreated cotton under both N2 and air atmospheres. The presence of phosphorus enables the cotton fabric to generate an aromatic phosphor carbonaceous structure during the combustion process. In addition, the tensile strength of cotton fabric was tested. After the introduction of AEP/IL, the average tensile strength value of untreated cotton improved from 129 to 167 N in the warp direction and 125–155 N in the weft direction. In summary, the introduction of AEP/IL improved both the flame‐retardant and mechanical properties of the cotton fabric significantly.

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Surface modification of epichlorohydrin‐modified aramid nanofibers using ionic liquid to improve the fire safety and tensile strength of cotton fabrics

Wang

Feng

Piao

et al. 2022

Polymers for Advanced Techs

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“…There are many types of hybrid structural materials that incorporate fabrics as their primary constituent. In several applications, the fabric is used as reinforcement within a polymer matrix to create moldable composites, 14,15 whereas in others, more flexible composites can be created by treating fabrics with additives 16 or laminating them with relatively compliant materials such as rubber. 17 The possibility of improving the mechanical properties of Kevlar fabric using different kinds of additives has been investigated previously.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of ballistic performance enhancement in silica nanoparticle-treated kevlar fabric

Bablu

Manimala

2022

Journal of Composite Materials

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Treating Kevlar fabric with silica nanoparticles is known to augment its mechanical properties, especially under shear deformation. Silica nanoparticle-treated Kevlar (SNK) fabric could therefore display improved ballistic performance. In this study, the ballistic performance of SNK with various percentages by weight of nanoparticle addition and number of layers is evaluated using compressed air gun experiments. A colloid-based treatment procedure is used to impregnate dry silica nanoparticles into the fabric. Addition of nanoparticles provided about 17.3% mass advantage (due to three fewer layers) for the 40 wt.% SNK vis-à-vis neat Kevlar for the non-penetrative case. SEM imaging reveals that at higher treatment levels the nanoparticles tend to agglomerate in the interstitial spaces of yarn crossover points, which helps better engage secondary yarns away from the impact location of the projectile. A semi-empirical model is developed to capture the influence of treatment level and number of layers on the kinetic energy absorbed by SNK. The flexibility of SNK is tested using a fixed cantilever test that avoids the sliding of the sample between flat plates used in standardized tests, which tends to dislodge the nanoparticles. The measured tip deflection angle decreases from 33o for the neat fabric to 19o for the 40 wt.% SNK. The flexural rigidities educed using digital image analysis range from 48.9 μNm2 for the neat fabric to 113.7 μNm2 for the 40 wt.% case. SNK could potentially enable multifunctional structural solutions in applications related to personal protective gear, military vehicle hulls and impact shielding of space structures.

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Application, Recycling, Environmental and Safety Issues, and Future Prospects of Crystalline Polymer Composites

Cetiner

Baskan‐Bayrak

Okan

2023

Polymer Crystallization

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Kevlar fibers reinforced straw wastes-polyethylene composites: Combining toughness, strength and self-extinguishing capabilities

Cited by 33 publications

References 56 publications

Surface modification of epichlorohydrin‐modified aramid nanofibers using ionic liquid to improve the fire safety and tensile strength of cotton fabrics

Surface modification of epichlorohydrin‐modified aramid nanofibers using ionic liquid to improve the fire safety and tensile strength of cotton fabrics

Mechanisms of ballistic performance enhancement in silica nanoparticle-treated kevlar fabric

Application, Recycling, Environmental and Safety Issues, and Future Prospects of Crystalline Polymer Composites

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