Nuri ÖZTÜRK, Semiha BAHÇELİ

CaA, NaX, NaY ve ZSM-5 Sentetik Zeolitleri Üzerine Adsorbe Edilen Polietilen Glikol (Mono- ve Di- Metil) Eterin Kırmızıaltı ve Raman Spektroskopileri ile Analizi

Polietilen glikol monometil eter (PEGMME) ve polietilen glikol dimetil eterin (PEGDME) CaA, NaX, NaY ve ZSM-5 zeolitleri üzerindeki adsorpsiyonları deneysel FT-IR ve Raman spektroskopileri kullanılarak analiz edilmiştir. Zeolitler üzerine adsorbe edilen polimerlerin titreşim dalgasayıları bildirilmiş ve farklı moleküler boyutlara ve katyonlara sahip zeolitlerin adsorpsiyon özellikleri karşılaştırılmıştır. Polimerlerin bazı titreşim modlarının kaybolması veya polimerler zeolitler üzerine adsorbe edildikten sonra daha yüksek ve daha düşük frekans bölgesine kaymalar; polimerler ve zeolitler arasındaki etkileşimin varlığını göstermektedir. Elde edilen deneysel spektral sonuçları dikkate alarak, polimerlerin zeolitler üzerindeki adsorpsiyon kaynağının, OH grupları veya polimer zincirlerine yerleşmiş oksijen atomları ile her bir zeolitin yüzeyindeki silanol hidroksil grupları arasındaki etkileşimlere dayandırılabileceğini söyleyebiliriz.

Anahtar Kelimeler:

Titreşim spektroskopisi, Zeolit, Adsorpsiyon, Polimer

Analyses of Polyethylene Glycol (Mono- and Di- Methyl) Ether Adsorbed on CaA, NaX, NaY, and ZSM-5 Synthetic Zeolites by Infrared and Raman Spectroscopies

The adsorptions of polyethylene glycol monomethyl ether (PEGMME) and polyethylene glycol dimethyl ether (PEGDME) on CaA, NaX, NaY, and ZSM-5 zeolites have been analyzed by using experimental FT-IR and Raman spectroscopies. The vibration wavenumbers of polymers adsorbed on zeolites have been reported and the adsorption properties of zeolites with different molecular sizes and cations have been compared. Disappearing of some vibration modes of polymers or shifts to the higher and lower frequency region after the polymers have been adsorbed on zeolites; indicates an interaction between polymers and zeolites. By considering the obtained experimental spectral results we can suggest that the source of adsorption of polymers on zeolites can be based on the interactions between OH groups or oxygen atoms settled in polymer chains and the silanol hydroxyl groups on the surface of each zeolite.

Keywords:

Vibrational spectroscopy, Zeolite, Adsorption, Polymer,

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