Compatibilization of acrylic polymer-silk fibroin blend fibers: 2. Morphology and mechanical properties of the compatilized blend fibers

Abstract

Three synthesized acrylonitrile-graft-silk fibroin copolymers (AN-g-SF), denoted as COP-65, COP-87, and COP-106, were used as potential compatilizers for acrylic polymer-silk fibroin blend fibers. Due to their different molecular weights and architecture, the compatibilizing efficiency is in the order of COP-106 Ͼ COP-65 Ͼ COP-87. To maintain the "sheath-core" structure of the blend fiber, COP-65 was chosen as the compatilizer. It was found that the addition of a small amount of COP-65 (up to 2 wt %) results in finer and more even distribution of the SF fibrils. On the contrary, excess COP-65 will cause flocculation and coalescence of the SF phase. Similarly, mechanical properties are enhanced with an optimum amount of the compatilizers. However, when excess COP-65 is added, the mechanical properties of the blend fibers are even worse than that of the uncompatilized samples. The mechanism of these findings is also discussed.

Removal of reactive dye brilliant red HE-3B from aqueous solutions by hydrolyzed polyacrylonitrile fibres: equilibrium and kinetics modelling

“…2a and b). As illustrated, the surface of PAN is relatively smooth, with a number of longitudinal cracks created during fibre formation [19,20]. However, after treatment with NaOH the fibre surface became rougher and more eroded, indicating that the hydrolysis reaction occurs on the surface of fibres.…”

Alkali resistance of a casein‐acrylonitrile graft copolymer fiber

“…A lot of studies have been focused on the combination of acrylonitrile‐based polymers and natural polymers. The strategies reported are mainly classfied into two ways: (a) graft‐polymerization of acrylonitrile onto casein,1–7 silk fibroin,8–10 wool keratin,11, 12 soybean protein,13, 14 gelatin15 etc., and (b) blending of ployacrylonitrile and silk fibroin,16–18 chitosan and its derivative 19–22…”

Structure and Properties of Soybean Milk Modified Polyacrylonitrile Fiber

“…3 SEM micrographs of surface of (a) original fiber; (b) grafted fiber Figure 3 shows the external section SEM micrographs of the PAN fiber before and after grafting modification respectively. As presented in Figure 3, the surface of the original PAN fiber is quite smooth and there are a number of longitudinal cracks on its external surface which have been assumed to be produced in the procedure of high-ratio stretching during the fiber formation [20]. After grafting modification, however, the surface of the PAN fiber got rougher and there was some deposition of soy pertein on it.…”