Conventional textile-based wound dressings are cost-effective and highly absorbent, but used alone, fail to provide optimal wound healing conditions (hemostasis, non-adherence, maintenance of a moist wound bed, etc.)....
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Conventional textile-based wound dressings are cost-effective and highly absorbent, but used alone, fail to provide optimal wound healing conditions (hemostasis, non-adherence, maintenance of a moist wound bed, etc.). Modern wound dressings often incorporate multiple non-textile components (films, gels, antimicrobials, and biological forms) that provide advanced functionalities at a significantly higher cost. Electrospun nanofiber dressings have demonstrated the potential to revolutionize wound care by providing significantly enhanced moisture management, barrier properties, and bioactivity. However, nanofiber webs are inherently weak and difficult to handle. Deposition of electrospun nanofiber coatings on a conventional textile bandages addresses the need for structural support, but faces challenges of delamination due to compliance mismatch or poor adhesion. Atmospheric plasma has been shown to increase adhesion of coatings to fibers due to enhanced surface chemistry and/or morphology.
In this study, polycardanol, which was synthesized by enzymatic oxidative polymerization of thermally treated cashew nut shell liquid (CNSL) using fungal peroxidase, was partially or fully cured using methyl ethyl ket...
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This article aims to illustrate an application of the Taguchi method of experimental design (TMED) for the preparation of poly(lactic acid) (PLA) nanoparticles via a nanoprecipitation technique. The effect of four per...
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In common with many other structured fluids, block copolymers can be effectively oriented by shear. This susceptibility to shear alignment has previously been shown to hold even in thin films, containing as few as two...
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In common with many other structured fluids, block copolymers can be effectively oriented by shear. This susceptibility to shear alignment has previously been shown to hold even in thin films, containing as few as two layers of spherical microdomains, or even a single layer of cylindrical microdomains. A phenomenological model has been proposed [M. W. Wu, R. A. Register, and P. M. Chaikin, Phys. Rev. E 74, 040801(R) (2006)] to describe the alignment of such block-copolymer films, yielding the microdomain lattice order parameter as a function of shearing temperature, stress, and time. Here we directly test the central idea of that model, that the grains which are most misaligned with the shear direction are selectively destroyed, to reform in a direction more closely aligned with the shear. Films are first shear aligned from a polygrain state into a monodomain orientation and are then subjected to a second shear, at a variable stress (σ) and misorientation angle (δθ) relative to the monodomain director, allowing the effects of σ and δθ to be independently and systematically probed. For both cylinder-forming and sphere-forming block copolymers, these experiments confirm the basic premise of the model, as the stress required for realignment increases monotonically as δθ becomes smaller. For a cylinder-forming block copolymer, we find that the characteristic stress σc required to realign cylinders from one monodomain orientation to another is indistinguishable from that required to generate a monodomain orientation from the polygrain state. By contrast, the hexagonal lattice of spheres requires a value of σc more than 3 times as high for reorientation than for generation of the initial monodomain orientation.
The treatment of alkaline wastewater (noted as A-water) from cleaning of color filter glass (CFG) was studied. The A-water contains hydroxide ion and dissolved acrylic resin of high concentrations of 4 M and 80,446 mg...
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PEDOT:PSS thick films, prepared by the drop-coated method, were used in this study for sensing nitric oxide (NO) gas. The thickness of PEDOT-PSS film was controlled by dropping different volumes of PEDOT-PSS solution ...
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