Polivinil Klorür İçeren Membranın Karakterizasyonunun ve Ekstraksiyon Veriminin Zaman İçerisinde Değişimi

Öz

Çalışmada polivinil klorür içeren polimerik membranın hazırlanmasının ardından belirli sürelerde oda sıcaklığında bekletilmesi ile membran morfolojisindeki değişim incelenmiştir. Bu amaçla membranlar, oda sıcaklığında ve herhangi bir toza veya kimyasala maruz bırakılmadan belli sürelerde laboratuvarda bekletilmiştir. Membranlarda bu süreler sonunda herhangi bir yırtılma ve yapısal bozulma meydana gelmemiştir. Membranların yüzey morfolojileri hakkında bilgi için taramalı elektron mikroskobu ile yüzey görüntüleri elde edilmiştir. Bu görüntülerde de yapısal bir bozunma olmadığı görülmüştür. Ayrıca membranların asit ve baza karşı dayanıklılıkları incelenmiş ve dayanıklıklarını korudukları belirlenmiştir. Bekletilen membranların metal ekstraksiyonunda akı ve verim değerlendirildiğinde, en az 6 ay ile 1 yıla kadar ciddi bir değişim görülmemiştir. Membran verimliliğinde de aynı sonuç elde edilmiştir. Elde ettiğimiz polimer içerikli membranların uzun zaman sonrada kullanılabildiği tespit edilmiştir. Bu durum PIM’ lerin ticari faaliyetlerdeki kullanımını artırabilmektedir.

Anahtar Kelimeler

• Kararlılık
• Dayanıklılık
• Akı
• Yüzey morfolojisi

The Change in Characterization of Membrane Containing Polyvinyl Chloride and of Extraction Efficiency over Time

Abstract

In the study, after the preparation of the polymeric membrane containing polyvinyl chloride, the change in the morphology of the membrane was investigated by keeping it at room temperature for certain periods. For this purpose, the membranes were kept at room temperature for certain periods in the laboratory without being exposed to any dust or chemicals. It was evaluated that the membranes did not show any tearing and structural deterioration after waiting. For information about the surface morphologies of the membranes, surface images were obtained by scanning electron microscopy and optical microscope images. It was observed that there was no structural deterioration in these images. Also, the resistance of the membranes to acids and bases was examined, and it was determined that they maintained their durability. At the end of the extraction experiments, flux and efficiency evaluations of the kept membranes showed no significant change for at least 6 months to 1 year. Similarly, the same result was found in membrane efficiency. It has been determined that the polymer inclusion membranes we have obtained can be used after a long time. This may increase the use of polymeric inclusion membrane (PIMs) in commercial activities.

Keywords

• Stability
• Durability
• Flux
• Surface morphology

Kaynakça

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