Control on molecular weight reduction of poly(ε-caprolactone) during melt spinning — A way to produce high strength biodegradable fibers

Pal, Jit; Kankariya, Nimesh; Sanwaria, Sunita; Nandan, Bhanu; Srivastava, Rajiv K.

doi:10.1016/j.msec.2013.06.011

Cited by 40 publications

(23 citation statements)

References 18 publications

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“…PCL is also used as a polymeric matrix to obtain nanocomposites by adding micro and nanoparticles to improve its mechanical properties and its thermal stability [ 6 ], thus taking also the advantage of the strong ability of PCL-based materials to be processed in different forms, such as bulk, films, and fibers, among others [ 7 ]. In particular, PCL fibers can be obtained by following different methods, such as melt-spinning, dry-spinning, and electrospinning, depending on the desired fiber properties as well as on the final applications [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Organic and Inorganic PCL-Based Electrospun Fibers

et al. 2020

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In this work, different nanocomposite electrospun fiber mats were obtained based on poly(e-caprolactone) (PCL) and reinforced with both organic and inorganic nanoparticles. In particular, on one side, cellulose nanocrystals (CNC) were synthesized and functionalized by “grafting from” reaction, using their superficial OH– group to graft PCL chains. On the other side, commercial chitosan, graphene as organic, while silver, hydroxyapatite, and fumed silica nanoparticles were used as inorganic reinforcements. All the nanoparticles were added at 1 wt% with respect to the PCL polymeric matrix in order to compare the different behavior of the woven no-woven nanocomposite electrospun fibers with a fixed amount of both organic and inorganic nanoparticles. From the thermal point of view, no difference was found between the effect of the addition of organic or inorganic nanoparticles, with no significant variation in the Tg (glass transition temperature), Tm (melting temperature), and the degree of crystallinity, leading in all cases to high crystallinity electrospun mats. From the mechanical point of view, the highest values of Young modulus were obtained when graphene, CNC, and silver nanoparticles were added to the PCL electrospun fibers. Moreover, all the nanoparticles used, both organic and inorganic, increased the flexibility of the electrospun mats, increasing their elongation at break.

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Section: Introductionmentioning

confidence: 99%

Organic and Inorganic PCL-Based Electrospun Fibers

et al. 2020

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“…Polyesters, and especially polyethylene terephthalate (PET) which has an estimated global market of 50 million tons per year , are present in our everyday life and they are applied in many different areas .…”

Section: Introductionmentioning

confidence: 99%

Polyester hydrolysis is enhanced by a truncated esterase: Less is more

Biundo

Ribitsch

Steinkellner

et al. 2016

Biotechnology Journal

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An esterase from Clostridium botulinum (Cbotu_EstA) previously reported to hydrolyze the biodegradable polyester poly(butylene adipate-co-terephthalate) was redesigned to improve the hydrolysis of synthetic polyesters. Increased activity was indeed observed for del71Cbotu_EstA variant, which performed activity on the widespread polyester polyethylene terephthalate, which was not able to be attacked by the wild-type enzyme Cbotu_EstA. Analysis of the 3D structure of the enzyme showed that removing 71 residues at the N-terminus of the enzyme exposed a hydrophobic patch on the surface and improved sorption of hydrophobic polyesters concomitantly facilitating the access of the polymer to the active site. These results show a new route for enhancing enzyme activity for hydrolysis and modification of polyesters.

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“…Its slow biodegradation rate in the human body make PCL suitable for implantable long-term drug delivery systems [ 77 ]. PCL is highly miscible and combines well with other polymers, and thus has been investigated as a polymer blend component or copolymer for various applications [ 78 , 79 , 80 , 81 ]. PCL in the form of filaments is also of interest for technical textiles, but its low melting point limits the application and thus only a few studies discuss the conventional melt-spinning of PCL homo-component fibers [ 82 , 83 , 84 , 85 ].…”

Section: Raw Materials For Melt-spinningmentioning

confidence: 99%

Melt-Spun Fibers for Textile Applications

et al. 2020

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Textiles have a very long history, but they are far from becoming outdated. They gain new importance in technical applications, and man-made fibers are at the center of this ongoing innovation. The development of high-tech textiles relies on enhancements of fiber raw materials and processing techniques. Today, melt spinning of polymers is the most commonly used method for manufacturing commercial fibers, due to the simplicity of the production line, high spinning velocities, low production cost and environmental friendliness. Topics covered in this review are established and novel polymers, additives and processes used in melt spinning. In addition, fundamental questions regarding fiber morphologies, structure-property relationships, as well as flow and draw instabilities are addressed. Multicomponent melt-spinning, where several functionalities can be combined in one fiber, is also discussed. Finally, textile applications and melt-spun fiber specialties are presented, which emphasize how ongoing research efforts keep the high value of fibers and textiles alive.

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Control on molecular weight reduction of poly(ε-caprolactone) during melt spinning — A way to produce high strength biodegradable fibers

Cited by 40 publications

References 18 publications

Organic and Inorganic PCL-Based Electrospun Fibers

Organic and Inorganic PCL-Based Electrospun Fibers

Polyester hydrolysis is enhanced by a truncated esterase: Less is more

Melt-Spun Fibers for Textile Applications

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