Effect of surface modification of hydrotalcite on plasticizer diffusion from hydrotalcite/PVC/chitosan composite films into air

Year 2024, Volume: 8 Issue: 2, 148 - 157, 30.12.2024

Emine Şanli , Ayşe Pınar Tüzüm Demir

https://doi.org/10.47137/usufedbid.1522771

Abstract

In this study, to reduce plasticizer migration from polyvinyl chloride (PVC) films, the effect of surface modification of the filler was invastigated. Therefore, surface of the inorganic filler was coated with crosslinked chitosan. The effect of inorganic filler (hydrotalcite), modification of the filler with chitosan, cross-linking of and crosslinker type on the plasticizer diffusion of the films were examined. Firstly, chitosan crosslinked with glutaraldehyde (GA) and 1-(3-dimethylaminopropyl)-3-ethyl-karbodimide (EDC), then it was coated onto the surface of the filler for the filler modification. Then, plastisol pastes were prepared from the formulations specified in the method. A small amount of plastisols from which air bubbles were removed were taken and 150μm thick films were drawn on the glass surface, these films were gelled in an oven, and plastigel films were obtained. These films were subjected to thermal aging. These studies were subjected in the oven at certain temperatures and times. Diffusion of plasticizer and oxidation were analyzed byFT-IR spectroscopy. The diffusion coefficient and activation energies for the migration of plasticizers were calculated by mass loss. The results show that the adding inorganic filler to PVC, modifying the filler with chitosan, and cross-linking the filler generally reduced to the diffusivity.

Keywords

PVC, hydrotalcite, chitosan, surface modification, plasticizer diffusion

Project Number

Uşak Üniversitesi, UBAP 01/ 2024/MF004

Hidrotalsit/PVC/kitosan kompozit filmlerden havaya plastikleştirici difüzyonu üzerinde hidrotalsitin yüzey modifikasyonunun etkisi

Abstract

Bu çalışmada, polivinil klorür (PVC) filmlerden plastikleştirici migrasyonunun azaltılması için dolgu maddesinin yüzey modifikasyonunun etkisi araştırılmıştır. Bu nedenle inorganik dolgunun yüzeyi çapraz bağlı kitosan ile kaplanmıştır. İnorganik dolgu maddesinin (hidrotalsit), dolgu maddesinin kitosan ile modifikasyonunun, çapraz bağlama ve çapraz bağlayıcı tipinin filmlerin plastikleştirici difüzyonuna etkisi incelenmiştir. Öncelikle kitosan glutaraldehit (GA) ve 1-(3-dimetilaminopropil)-3-etil-karbodimid (EDC) ile çapraz bağlandı, daha sonra dolgu modifikasyonu için dolgunun yüzeyine kaplandı. Daha sonra yöntemde belirtilen formülasyonlardan plastisol macunları hazırlandı. İçinde hava kabarcıkları uzaklaştırılmış az miktarda plastisol alınarak cam yüzeye 150μm kalınlığında filmler çizildi, bu filmler fırında jelleştirildi ve plastijel filmler elde edildi. Bu filmler termal yaşlanmaya tabi tutuldu. Bu çalışmalar belirli sıcaklık ve sürelerdeki fırında gerçekleştirilmiştir. Plastikleştiricinin difüzyonu ve oksidasyonu FT-IR spektroskopisi ile analiz edildi. Plastikleştiricilerin migrasyonu için difüzyon katsayısı ve aktivasyon enerjileri kütle kaybı ile hesaplandı. Sonuçlar, PVC'ye inorganik dolgu maddesi eklenmesinin, dolgu maddesinin kitosan ile değiştirilmesinin ve dolgu maddesinin çapraz bağlanmasının genel olarak yayılmayı azalttığını göstermektedir.

Keywords

PVC, Hidrotalsit, kitosan, yüzey modifikasyonu, plastikleştirici difüzyonu

Project Number

Uşak Üniversitesi, UBAP 01/ 2024/MF004

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