İnorganik Malzeme Dolgulu PDMS Filmlerin Etanol, Bütanol, Aseton ve Su İçindeki Sorpsiyon Davranışı

Öz

Gözeneksiz bir membran boyunca taşınım mekanizmasının çözelti-difüzyon modeli ile açıklandığı pervaporasyon yöntemi, su-organik ve organik-organik karışımların ayrılmasında kullanılabilmektedir. Polimerik bir membranın sorpsiyon davranışı, çözücü ve polimer özelliklerine bağlı olarak, membran taşınımında önemli bir rol oynar. Diğer tüm membran proseslerinde olduğu gibi pervaporasyon yönteminde de membran anahtar bileşen olduğundan, sıvı karışımdan en az bir bileşeni seçici olarak ayırabilen uygun membran malzemesinin belirlenmelidir. Etanol, bütanol ve aseton birçok endüstriyel uygulamada yaygın olarak kullanılmaktadır. PDMS, organik-su karışımlarından organiklerin geri kazanılmasında veya organik-organik karışımların ayrılmasında sıklıkla kullanılmaktadır. PDMS, yüksek zincir hareketliliği, düşük mekanik direnç ve düşük seçicilik değerleri verdiğinden özelliklerinin iyileştirilmesi gerekmektedir. Bu çalışmada dolgusuz PDMS, PDMS/TiO2, PDMS/NaY ve PDMS/5A karışık matris filmler hazırlanmış ve PDMS filmlerin 30,40 ve 50°C sıcaklıklarda farklı kimyasal maddelerdeki sorpsiyon davranışları incelenmiştir.

Anahtar Kelimeler

• Polidimetilsiloksan
• Membran
• Karışık matris
• Sorpsiyon

Sorption Behaviour of Inorganic Material Filled-PDMS Films in Ethanol, Butanol, Acetone and Water

Abstract

The pervaporation method in which the transport mechanism through a nonporous membrane is explained by the solution-diffusion model can be used for the separation of water-organic and organic-organic mixtures. The sorption behaviour of a polymeric membrane plays important role in membrane transport, depending on the solvent and polymer properties. Since the membrane itself is the key component in the pervaporation method, as with all other membrane processes, it is necessary to determine suitable membrane material that can selectively separate at least one component from a liquid mixture. Ethanol, butanol and acetone are widely used in many industrial applications. PDMS is one of the polymers that is frequently used in the recovery of organics from organic-water mixtures or the separation of organic-organic mixtures. PDMS gives high chain mobility, low mechanical resistance and low selectivity values. For this reason, its properties need to be improved. In this study, unfilled PDMS, PDMS/TiO2, PDMS/NaY and PDMS/5A mixed matrix films were prepared, and the sorption behaviours of prepared PDMS films in different chemical substances at temperatures of 30,40 and 50°C were investigated.

Keywords

• Polydimethylsiloxane
• Membrane
• Mixed matrix
• Sorption

Kaynakça

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