Contrary to expectation, we demonstrate that spider dragline silk spun experimentally under water displays greater stiffness and higher resilience compared to silk spun "naturally" into air. We suggest that this consequence of extended wet-spinning is due to increased molecular orientation resulting from extension of the mobile phase.

Two types of graphene oxide fibers are spun from high concentration aqueous dopes. Fibers extruded from large flake graphene oxide dope without drawing show unconventional 100% knot efficiency. Fibers spun from small sized graphene oxide dope with stable and continuous drawing yield in good intrinsic alignment with a record high tensile modulus of 47 GPa.

Novel spun fibers with intrinsic asymmetric stress and millimeter spin periods are characterized both experimentally and theoretically. Based on the optical spectra of imprinted Bragg gratings, a new method is proposed to precisely measure their spin periods with a 0.1-mm spatial resolution. Properties of polarization-mode dispersion (PMD) and evolutions of polarization in these spun fibers are...

Studying the fiber positioning in yarn structure is essential point to understand different characteristics of yarns that counted as alternatives each other. This study explores packing densities single-ply, two-ply and Siro-spun spun have been stated alternative types considering production method or structure. In study, Modal, Tencel, polyethylene teraphtalete, cotton fibers represent micro, ...

Anisotropic alignment of collagen fibres in musculoskeletal tissues is responsible for the resistance to mechanical loading, whilst in cornea is responsible for transparency. Herein, we evaluated the response of tenocytes, osteoblasts and corneal fibroblasts to the topographies created through electro-spinning and solvent casting. We also evaluated the influence of topography on mechanical prop...

One of the main reasons for nonlinearity tension diagrams cotton yarns is variability their moduli elasticity and plasticity under strain. The changes in strain obtained from tensile confirm this. curve has ten parameters, values which depend on method yarn manufacture rate. Based results processing yarn, by carded combed systems ring rotor spinning (CD-carded ring-spun, OE-carded rotor-spun, C...

Regarding the importance of ring spinning method among spinning systems, great potentials exist for research about on the improvement of the quality and properties of ring spun yarn. This study aims to improve yarn quality by changing the shape and dimensions of spinning triangle through forming a groove in the middle zone of the front darfting roller with a curvature of 5 to 7 mm. For the to...

Regarding the importance of ring spinning method among spinning systems, great potentials exist for research about on the improvement of the quality and properties of ring spun yarn. This study aims to improve yarn quality by changing the shape and dimensions of spinning triangle through forming a groove in the middle zone of the front darfting &#10roller with a curvature of 5 to 7 mm. For the ...

nowadays, polymer blends usages increase more and more in order to produce materials with better properties. according to many research works, the blends of polyolefins have shown industrial importance. the purpose of this project was to carry out some investigations on fibers melt spun from the polypropylene and low density polyethylene blends. pp and ldpe are immiscible. pp/ldpe blend filamen...