Morphological and mechanical analysis of electrospun shape memory polymer fibers

Mutifunctional Electrospun Nonwoven Mats with Two‐Way Shape Memory Behavior Prepared from Sol–Gel Crosslinked Poly(ε‐Caprolactone)

“…[15] Since the earliest investigations, the development of electrospun systems with shape memory capabilities have shown interesting further advantages: a faster transformation process, with respect to bulk materials, may be achieved, [25,26] thanks to the high surface area (in case of a thermally triggered process) and to a faster diffusion (in case of a water triggered process); further, relatively high values of temporary shape retention (or strain fixity) and shape recovery were found, with value ranging between 80% and somewhat higher than 90%. [24,[27][28][29][30][31] On a more mechanical basis, the possibility to have a fibrous shape memory network may be interesting for the development of innovative shape memory composites, obtained by embedding the electrospun SMP in a compliant elastomeric matrix, [26,[32][33][34] where the fibrous structure provides not just the stimuli-responsive feature, but also the possibility to tailor the transformation temperatures and the system stiffness. Further, by such an approach, also materials with intrinsic anisotropic properties, mimicking most of biological tissues, may be obtained.…”

Development of contact-killing non-leaching antimicrobial guanidyl-functionalized polymers via click chemistry

“…The growing applications of polyurethanes stem from the ability to tailor their properties via step additionalpolymerization between isocyanate and hydroxyl functionalities, which is the foundation of its compatibility with different components. Polyurethane allows for the introduction of functional molecules and the material exhibits excellent thermal and mechanical properties, all of which fuel the use of polyurethanes in adhesives, 33 sealants, 34 synthetic bers, 35 foams, 36 coatings, 37 biomedical implants 38 and antimicrobial materials. 39,40 Click chemistry, especially the favored copper-catalyzed azide-alkyne cycloaddition (CuAAC) process, is a robust, efficient and orthogonal method for the construction of functional molecules.…”

Elektrik Alan ile Lif Çekimi Yöntemi ile Elde Edilen Ligand Katkılı Poliüretan Nanoliflerin Morfolojik ve Lüminesans Özelliklerinin İncelenmesi

“…Elektrik alan ile lif çekimi yöntemi ile elde edilen nanoliflerin çap değişimi ve morfolojilerinin önemli ölçüde etkilendiği parametreler; çözelti özellikleri (viskozite, iletkenlik, polimerin molekül ağırlığı ve konsantrasyonu, yüzey gerilimi, çözücü cinsi), işlem değişkenleri (elektrik alan şiddeti, besleyici ünite ve toplayıcı arası mesafe, besleme hızı) ve ortam koşullarıdır (sıcaklık, nem) [12][13][14]. Bu parametrelerden önemli bir tanesi çözelti özellikleridir.…”