Nanostructured poly(lactic acid)/soy protein/HPMC films by electrospinning for potential applications in food industry. (March 2019)

• Record Type: Journal Article
• Authors: Aydogdu, Ayca; Yildiz, Eda; Ayhan, Zehra; Aydogdu, Yıldırım; Sumnu, Gulum; Sahin, Serpil
• Is Part Of: European polymer journal. Volume 112(2019)
• Page Start: 477
• Page End: 486
• Publication Date: 2019-03
• Subjects: Nanobiocomposite -- Electrospinning -- PLA -- Soy protein -- Packaging -- Nanofiber; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; Polymerization; Polymers; Periodicals; Electronic journals; 547.705
• DOI: 10.1016/j.eurpolymj.2019.01.006
• Languages: English
• ISSNs: 0014-3057

Abstract

Graphical abstract: Highlights: PLA sheets were successfully covered homogenous nanofibers by electrospinning. PLA-nanofiber combination sheets had lower transparency values than neat PLA sheets. PLA/SoyProtein sheets had higher thermal stability than PLA/HPMC ones. Bilayer nanostructured films can be used as an alternative food package material. Abstract: As an alternative to oil based materials, there is a demand for easily degradable packaging materials. With this regard, the objective of this study is to produce bilayer nanofiber sheets composed of Poly (lactic acid) (PLA) and soy protein, hydroxypropyl methylcellulose (HPMC) and combination of them by using electrospinning. In addition, it was aimed to analyze morphological, optical, thermal properties of films and investigate permeability characteristics. Homogenous nanofibers were successfully collected onto PLA sheets. The solution containing HPMC had the highest viscosity and the lowest electrical conductivity values. Therefore, HPMC based nanofibers had the highest the average diameter values. Combining nanofibers with PLA sheets decreased transparency as compared to the transparency of neat PLA, it also did not improve permeability values. When the thermal properties of PLA/nanofibers were examined it was observed that while PLA sheet showed one stage degradation, bilayer films had two stage degradation. Soy protein containing nanofibers showed higher thermal stability. The FTIR spectrum of PLA/nanofiber sheets displayed the chemical characteristics of both PLA and nanofibers. PLA/nanofiber sheets obtained by electrospinning can be suggested in packaging of light sensitive foods.