Electrospun PLA: PCL composites embedded with unmodified and 3-aminopropyltriethoxysilane (ASP) modified halloysite nanotubes (HNT)
MetadataShow full item record
Electrospinning is a simple and versatile fiber synthesis technique in which a high-voltage electric field is applied to a stream of polymer melt or polymer solution, resulting in the formation of continuous micro/nanofibers. Halloysite nanotubes (HNT) have been found to achieve improved structural and mechanical properties when embedded into various polymer matrices. This research work focuses on blending poly(ε-caprolactone) (PCL) (9 and 15 wt%/v) and poly(lactic acid) (PLA) (fixed at 8 wt%/v) solutions with HNT at two different concentrations 1 and 2 wt%/v. Both unmodified HNT and HNT modified with 3-aminopropyltriethoxysilane (ASP) were utilized in this study. Fiber properties have been shown to be strongly related to the solution viscosity and electrical conductivity. The addition of HNT increased the solution viscosity, thus resulting in the production of uniform fibers. For both PCL concentrations, the average fiber diameter increased with the increasing of HNT concentration. The average fiber diameters with HNT-ASP were reduced considerably in comparison to those with unmodified HNT when using 15 wt%/v PCL. Slightly better dispersion was obtained for PLA: PCL composites embedded with HNT-ASP compared to unmodified HNT. Furthermore, the addition of HNT-ASP to the polymeric blends resulted in a moderate decrease in the degree of crystallinity, as well as slight reductions of glass transition temperature of PCL, the crystallization temperature and melting temperature of PLA within composite materials. The infrared spectra of composites confirmed the successful embedding of HNT-ASP into PLA: PCL nanofibers relative to unmodified HNT due to the premodification using ASP to reduce the agglomeration behavior. This study provides a new material system that could be potentially used in drug delivery, and may facilitate good control of the drug release process.
The final publication is available at: http://www.springerlink.com
Showing items related by title, author, creator and subject.
Electrospun poly(lactic acid) (PLA): poly(ε-caprolactone) (PCL)/halloysite nanotube (HNT) composite fibers: Synthesis and characterizationHaroosh, Hazim; Dong, Yu (2015)The incorporation of nanoparticles into polymer nanocomposites via electrospinning offers an effective approach to tailor composite properties and fabricate nonwoven fibrous structures. This chapter describes a general ...
Comparative Deflection Hardening Behavior of Fly Ash-Based Geopolymer Composite with the Conventional Cement-Based CompositeNematollahi, B.; Sanjayan, J.; Shaikh, Faiz (2014)This paper compares the behavior of a recently developed fly ash-based ductile fiber reinforced geopolymer composite (DFRGC) exhibiting deflection hardening and multiple cracking behavior in flexure with its cement-based ...
Synthesis, morphological structures and material characterization of electrospun PLA: PCL/magnetic nanoparticle composites for drug deliveryHaroosh, Hazim; Dong, Yu; Ingram, Gordon (2013)The effects of pure and impure magnetic nanoparticles (MPs) with three different concentrations (0.01, 0.1 and 1 wt%/v) on the morphological structure, crystallinity level, thermal properties and constituent interactions ...