Morphological Structure and Thermal Property of PLA/PCL Nanofiber by Electrospinning

2014 ◽  
Vol 1048 ◽  
pp. 418-422 ◽  
Author(s):  
Rui Tian Zhu ◽  
Ming Hao Tan ◽  
Peng Zhang ◽  
Liang Zhang ◽  
Xiao Ming Chen ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Medical Equipment ◽  
Morphological Structure ◽  
Diameter Distribution ◽  
Poly Lactic Acid ◽  
Adhesive Film ◽  
Mean Diameter ◽  
Blend Fiber ◽  
Biomedical Field ◽  
Poly Caprolactone

Poly (lactic) acid (PLA)/poly (caprolactone) (PCL) blends nanofibers, with mean diameter about 600nm, were prepared by electrospinning. This research focused on the morphological and thermal properties of nanofibers made from PLA/PCL bends with different PCL content. The results showed that the addition of PCL could improve the morphology of the nanofibers. The film with blend fiber at PLA/PCL ratio of 80:20 is characterized with the smoothest surface and the highest orientation. The diameter distribution of blend fibers is wider than that of pure PLA. The glass-transition temperature of PLA for blend fiber is higher than that of pure PLA, and their melting temperature is lower than that of pure PLA. It can be used in biomedical field for degradable membrane, anti-adhesive film and medical equipment.

scholarly journals Reaction Mechanism and Mechanical Property Improvement of Poly(Lactic Acid) Reactive Blending with Epoxy Resin

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2429
Author(s):  
Krittameth Kiatiporntipthak ◽  
Nanthicha Thajai ◽  
Thidarat Kanthiya ◽  
Pornchai Rachtanapun ◽  
Noppol Leksawasdi ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Epoxy Resin ◽  
Softening Temperature ◽  
Poly Lactic Acid ◽  
Mechanical And Thermal Properties ◽  
Nanoparticle Dispersion ◽  
Reactive Blending ◽  
Partial Miscibility ◽  
Epoxy Blends ◽  
Epoxy Content

Polylactic acid (PLA) was melt-blended with epoxy resin to study the effects of the reaction on the mechanical and thermal properties of the PLA. The addition of 0.5% (wt/wt) epoxy to PLA increased the maximum tensile strength of PLA (57.5 MPa) to 67 MPa, whereas the 20% epoxy improved the elongation at break to 12%, due to crosslinking caused by the epoxy reaction. The morphology of the PLA/epoxy blends showed epoxy nanoparticle dispersion in the PLA matrix that presented a smooth fracture surface with a high epoxy content. The glass transition temperature of PLA decreased with an increasing epoxy content owing to the partial miscibility between PLA and the epoxy resin. The Vicat softening temperature of the PLA was 59 °C and increased to 64.6 °C for 0.5% epoxy. NMR confirmed the reaction between the -COOH groups of PLA and the epoxy groups of the epoxy resin. This reaction, and partial miscibility of the PLA/epoxy blend, improved the interfacial crosslinking, morphology, thermal properties, and mechanical properties of the blends.

Effect of Solution Conductivity on the Morphology of Bubble-Electrospun Nanofibers

2011 ◽  
Vol 332-334 ◽  
pp. 1003-1006 ◽  
Author(s):  
Rui Rui Yang ◽  
Ji Huan He ◽  
Jian Yong Yu
Keyword(s):  
Mass Fraction ◽  
Smooth Surface ◽  
Electrospun Nanofibers ◽  
Diameter Distribution ◽  
Electrical Conductivities ◽  
Mean Diameter ◽  
Solution Conductivity

In this paper, we have bubble-electrospun PLA nanofibers to analyze and investigate the effect of different electrical conductivities by adding different amounts of LiCl into the PLA/DMF solutions on the morphology and diameter of the nanofibers. As a result, it is found that when the mass fraction of LiCl is 0.5%, we can obtain the smallest mean diameter of bubble-electrospun nanofibers with more smooth surface and uniform fineness. Moreover, both improving and reducing LiCl concentration brings on coarse nanofibers surface and poor diameter distribution.

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