Photodegradation Behavior of Kevlar 29 Fabrics against UV-Irradiation and the Effects of the Treatment with Water-Soluble Feather Keratin Derivatives on Both the UV-Irradiation-Induced Degradation of Kevlar 29 and the Enhancement in the Interaction at the Interface of Kevlar 29 Fiber-Feather Resin Composite

To reinforce the feather resin with Kevlar 29 fibers, the fibers were pretreated with the water-soluble protein derivatives prepared from the waterfowl feathers to cover the outer surface of the fibers. For this purpose, we used aluminum chloride hexahydrate for the pretreatment. When aluminum chlor...

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Bibliographic Details
Published in:Journal of textile engineering 2023-02, Vol.69 (1), p.9-15
Main Authors: KAWAHARA, Yutaka, OHNO, Takeki, ITOI, Yuki, TAKADA, Yuto, YAMAMOTO, Masaki, WAKIZAKA, Hiroyuki, IKEDA, Yoshimitsu
Format: Article
Language:eng ; jpn
Subjects:
Aluminum
Aluminum chloride
Aluminum hydroxide
Aramid fiber reinforced plastics
Chlorides
Composite materials
Grooves
Hydrochloric acid
Irradiation
Kevlar (trademark)
Modulus of elasticity
Photodegradation
Photosensitivity
Proteins
Resins
Stress propagation
Stress transfer
Tensile strength
Ultraviolet radiation
Water chemistry
Waterfowl
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Summary:To reinforce the feather resin with Kevlar 29 fibers, the fibers were pretreated with the water-soluble protein derivatives prepared from the waterfowl feathers to cover the outer surface of the fibers. For this purpose, we used aluminum chloride hexahydrate for the pretreatment. When aluminum chloride hexahydrate is hydrolyzed in water, hydrochloric acid and aluminum hydroxide oligomer are generated. The former will work as an etching agent to form small pits or grooves on the fiber surface, and the latter will settle the protein derivatives on the fiber surface through chelate bonding. As a result, we succeeded in generating the insoluble stable coating on the Kevlar 29 fiber surface. This protein coating effectively reduced the photosensitivity of Kevlar 29 to the irradiation with ultraviolet (UV) rays, and fairly prevented the reduction in the tensile strength of the fibers. The photodegradation of Kevlar 29 fibers was found to proceed remarkably in the early stage of the irradiation with UV rays. It also changed the hue of the fibers. The feather resin reinforced with the protein-coated Kevlar 29 fibers exhibited an excellent sonic propagation speed, and a stress transfer coefficient resulted in 0.8 when the law of mixture was applied to the elastic modulus of the composite.
ISSN:1346-8235
1880-1986
DOI:10.4188/jte.69.9