pH responsive polyurethane (core) and cellulose acetate phthalate (shell) electrospun fibers for intravaginal drug delivery

Abstract

17In this study we present the use of co-axial electrospinning to produce core-shell composite micro- 18/nano-fibers of Polyurethane (PU) and Cellulose acetate phthalate (CAP). The designed fibers possess 19 enhanced mechanical properties with a tensile strength of 13.27±2.32 MPa, which is a clear 20 improvement over the existing CAP fibers that suffer from a poor mechanical strength (0.2±0.03 MPa). 21The CAP imparts pH responsiveness to the core-shell structure giving the fibers potential for "semen 22 sensitive" (intravaginal) drug delivery.

Producing hybrid nanofiber‐based on /PAN/Fe3O4/zeolite/nettle plant extract/urease and a deformed coaxial natural polymer to reduce toxicity materials in the blood of dialysis patients

“…By comparison, article,5 it was observed that pure PU fibers were not destroyed until 300 C, but it has three steps weight loss for coaxial electrospun nanofibers similar to our investigation. Second reduction is 158.55-217.45 C that burnt 0.774 mg (15.176%) of nanofibers.…”

“…Our main focus was that zeolite should be arrayed on Fe 3 O 4 . A comparison of Figure 3(D) of our article with other research published by Hua et al, 5 revealed that CAP-PU with these concentrations had no beads. By increasing zeolite particles, the electrons of Fe nuclei in Fe 3 O 4 were effected on zeolite, which led to the reduction in particle size.…”

“…Hemodialysis is a process used to eliminate excess metabolites in cells via semipermeable membranes. 5 Among the most common crystalline porous particles, zeolites are one of the best alumina silicates used for numerous molecular sieve and high resistance in chemical and thermal process. 1 Recently, some researchers tried to invent a filtration process, which can efficiently adsorb more toxins within a shorter period of time.…”

“…4 Coaxial electrospinning can also retain unstable biological external particles and viruses and vindicate the decomposition of unstable compounds. 5 Among the most common crystalline porous particles, zeolites are one of the best alumina silicates used for numerous molecular sieve and high resistance in chemical and thermal process. 6 Among the different types of zeolites formed by changing Si/Al ratio, the beta type is highly effective in adsorbing and activation.…”

Core‐sheath structured TiO2@PVDF/PAN electrospun membranes for photocatalysis and oil‐water separation

“…PVDF and PAN are separately combined with TiO 2 in numerous studies, based on which scholars also analyze the influences of blending PVDF and PAN and the addition of the particles on the properties of membranes . Many scholars use core‐sheath structure to enhance mechanical property and improve the performance of its oil/water separation . However, there are few studies on the production of TiO 2 @PVDF/PAN electrospun membranes with a core‐sheath structure or the comparisons between TiO 2 @PVDF/PAN electrospun membranes and traditional electrospun membranes, which are subsequently the purpose and design of this study.…”