Effect of surface modification by bromination and metalation on Kevlar fibre-epoxy adhesion

Lin, Jeng-Shyong

doi:10.1016/s0014-3057(01)00176-8

Cited by 106 publications

(26 citation statements)

References 12 publications

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“…The spectrum of the fibers treated by 200 kGy irradiation grafting had the -CH 2 stretching vibration peak of epoxy group at 2990 cm −1 that clearly showed the 1,2-epoxy-3-chloropropane had been grafted onto the fibers. Therefore, we confirmed that the chemical activity of the fiber surface was increased by γ -irradiation grafting, which resulted in the increase of the interfacial binding force with matrix resins [5].…”

Section: Fourier-transformed Infrared Spectrum Analysissupporting

confidence: 70%

“…For this purpose it uses chlorosulfonic acid [2], orthophosphoric acid (H 3 PO 4 ) [3], methanesulfonic acid (MSA) or nitric acid (HNO 3 ) solution treatment [4], as well as bromoacetic acid and chlorohydrin treatment using metalation and bromination [5], or even acetic anhydride treatment [6]. The grafting materials themselves include toluene-2,4-diisocyanate (TDI) [7], glycidyl methacrylate (GMA) [8], or acrylamide (AM) grafting through horseradish peroxidase catalyzed reaction [9], rare earth modifier (RES) [10,11], or other materials.…”

Section: Introductionmentioning

confidence: 99%

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Influence of γ-ray radiation grafting on interfacial properties of aramid fibers and epoxy resin composites

Zhang

Huang

et al. 2008

Composite Interfaces

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This research used Co 60 γ -ray radiation to modify Armos fibers in 1,2-epoxy-3-chloropropane. After the treatment, the interlaminar shear strength (ILSS) values of aramid/epoxy composites were improved by about 20%. Surface elements of Armos fibers were determined by XPS analysis, which indicated that the oxygen/carbon ratio was increased. The surface of the fibers treated was rougher than that of the untreated fibers when examined by atomic force microscopy (AFM) and scanning electron microscopy (SEM). Fourier transform infrared (FT-IR) spectra confirmed that the epoxy group was grafted onto the fibers. The wettability of the fibers' surface was also enhanced by the treatment. Nanoindentation technique analysis showed that the nanohardnesses of the various phases (the fiber, the interface and the matrix) in the composite, whose fibers were treated, were correspondingly higher than those in the composite, whose fibers were untreated. The results indicate that γ -ray irradiation grafting technique, which is a suitable batch process for industrialization, can modify the physicochemical properties of Armos fibers and improve the interfacial adhesion of its composite.

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Section: Fourier-transformed Infrared Spectrum Analysissupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Influence of γ-ray radiation grafting on interfacial properties of aramid fibers and epoxy resin composites

Zhang

Huang

et al. 2008

Composite Interfaces

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“…Fibers have been functionalized by several processes including nitration, 8 metalation, 13,14 organic solvent treatment 15 and plasma functionalization 11,12 in the past with limited success.…”

Section: Part 1 Evaluation For Hard Armormentioning

confidence: 99%

STIR: Tailored Interfaces for High Strength Composites Across Strain Rates

Sodano¹

2013

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. The objective of this STIR research effort was to study the influence of nanostructured interfaces in the interfacial behavior of polymer fiber reinforced composites such that lightweight materials can be designed for both structural and ballistic performance. To achieve this objective a nanostructured interface has been be grown on the fiber surface using a process recently developed by the PI. This process allows for growth at low temperature, which preserves the fiber strength and makes the growth compatible with polymer fibers. This is the first technique for ABSTRACTThe objective of this STIR research effort was to study the influence of nanostructured interfaces in the interfacial behavior of polymer fiber reinforced composites such that lightweight materials can be designed for both structural and ballistic performance. To achieve this objective a nanostructured interface has been be grown on the fiber surface using a process recently developed by the PI. This process allows for growth at low temperature, which preserves the fiber strength and makes the growth compatible with polymer fibers. This is the first technique for the growth of a reinforcing whisker or nanowire on polymer fibers. The nanowire growth process is highly controllable and acts to enhance the load transfer between the matrix and fiber while also providing out of plane reinforcement. The controllable nanowire growth offer a means for optimizing the interfacial properties such that an ideal material response can be obtained at both high and low strain rates. In addition to control of the nanowire morphology and load transfer, the adhesive bond between the brittle nanowires and the tough Kevlar fiber was varied such that under impact the interface releases the fiber to absorb the ballistic energy. (c) Presentations

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“…Certain studies on p-aramid/epoxy FRP composites deal with diverse chemical surface treatment of the reinforcing fibers: bromination and metalation [68], treatment with phosphoric acid solution [69], surface modification by Friedel-Crafts type reactions [70] or with small amount of rare earths [71]. Application of organic solvents [72] and coating of the p-aramid with aliphatic polyamides [73] have also been investigated.…”

Section: Epoxy Resin Matricesmentioning

confidence: 99%

“…Even more effective was the treatment with 10% H 3 PO 4 , resulting in a growth of ILSS from 15 to 32 MPa and of the flexural resistance (measured by the critical stress intensity factor) from 12 to 23 MPa.cm 1/2 . All these studies [68][69][70][71][72][73] show that the surface treatment of aramid fibers (with the exception of polyamide 6 fiber coating) is a good way of improving the adhesion at the fibers/epoxy matrix interface.…”

Section: Epoxy Resin Matricesmentioning

confidence: 99%