Surface modified halloysite nanotubes incorporated polyl-lactide nanocomposites for food packaging applications
tarafından
 
Tüzün, Ece Zeynep, author.

Başlık
Surface modified halloysite nanotubes incorporated polyl-lactide nanocomposites for food packaging applications

Yazar
Tüzün, Ece Zeynep, author.

Yazar Ek Girişi
Tüzün, Ece Zeynep, author.

Fiziksel Tanımlama
xiii, 93 leaves: charts;+ 1 computer laser optical disc.

Özet
Biodegradable Poly (L-lactide) (PLA) can replace petroleum based packaging materials to solve environmental problems. PLA lacks of ductility and have moderate barrier properties. In this study, halloysite nanotubes (HNTs) possessing unique surface chemistry and tubular structure were incorporated into PLA matrix to overcome drawbacks of PLA. Firstly, HNT surface was modified with aminopropyltriethoxysilane (APTES) to enhance interfacial adhesion between HNTs and PLA matrix by decreasing the hydrophilicity of HNTs. Modified HNTs (m-HNTs) were characterized by SEM, FTIR, TGA, N2 adsorption-desorption analysis, XRD and XPS. FTIR, XRD and XPS results revealed that APTES was successfully grafted onto HNTs. The optimum pH and APTES concentration for the silanization of HNTs were determined as 3.50 and 1%, respectively. HNT/PLA and m-HNT/PLA nanocomposite films with different wt% of nanofiller loadings were prepared by solution casting. The films were characterized by FTIR, XRD, tensile test, water vapor permeation, DSC, TGA, contact angle and SEM analysis and color measurements. Better dispersion and consequently better mechanical properties were obtained with m-HNT addition compared to unmodified ones. Tensile strength at break of PLA was increased by 4.7% and 16.6% with 2 wt% HNT and m-HNT addition, respectively. m-HNT/PLA nanocomposites had better water vapor barrier properties than unmodified HNT/PLA nanocomposites while both of them improved the barrier property. Best mechanical and water vapor barrier properties were achieved with 2% modified HNT (1% APTES) containing PLA nanocomposites. Therefore, nanocomposite films produced in this study with high transparency and good barrier property can be a suitable candidate for fresh food packaging.

Konu Başlığı
Food -- Packaging.
 
Halloysite.
 
Nanocomposites (Materials)
 
Nanotubes.

Yazar Ek Girişi
Tıhmınlıoğlu, Funda

Tüzel Kişi Ek Girişi
İzmir Institute of Technology. Chemical Engineering.

Tek Biçim Eser Adı
Thesis (Master)--İzmir Institute of Technology: Chemical Engineering.
 
İzmir Institute of Technology: Chemical Engineering--Thesis (Master).

Elektronik Erişim
Access to Electronic Versiyon.


LibraryMateryal TürüDemirbaş NumarasıYer Numarası
IYTE LibraryTezT001944TP374 .T96 2019