SYNTHESIS AND CHARACTERIZATION OF ITACONIC ACID BASED HYDROGELS
Anahtar Kelimeler:
Metilen Mavisi, İtakonik Asit, Stearil Metakrilat, Hidrojel.Özet
Hidrojeller, genellikle büyük miktarda su tutabilen, üç boyutlu, su ile temasında çözünmeyen, çapraz bağlı polimer ağlardan oluşan yumuşak malzemeler olarak tanımlanmaktadır. Polimer hidrojel sistemleri günlük yaşamda ve endüstride önemli uygulamalarda kullanılmaktadır. pH, sıcaklık, iyonik kuvvet vb. dış etkilere duyarlı olan hidrojeller "Akıllı Hidrojeller" olarak adlandırılmakta ve biyomedikal, biyoteknoloji, kontrollü ilaç salımı, atık suların arıtılması gibi çeşitli alanların son yıllardaki araştırma konularının içinde oldukça geniş yer tutmaktadır. Boyar maddelerin atık sulardan uzaklaştırılması için çeşitli teknolojiler vardır. Ancak bu tekniklerin çoğu hem ekonomik maliyet hem de enerji tüketimi açısından yüksektir ve bu teknolojilerin bazıları kirletici ve toksik atıkları ortadan kaldırmamakta, ikincil kirliliğe neden olmaktadır. Alternatif olarak adsorpsiyon yüksek verimi, kolay kullanımı ve adsorbanların işlenecek madde ile düşük reaktivitesi nedeniyle en etkili yöntemlerden biri olarak kabul edilmektedir. Boya adsorbanı olarak genellikle geniş yüzey alanına sahip aktif karbon, zeolit, ve iyon değişim reçineleri kullanılmaktadır. Ancak bu malzemeler, adsorpsiyon verimliliklerinin düşük olması, maliyetlerinin yüksek olması ve çevre dostu olmamaları gibi dezavantajlara sahiptirler. Adsorbent olarak hidrojeller, tüm bu dezavantajların üstesinden gelebilmektedir.
Bu çalışmada, itakonik asidin N-hidroksimetil akrilamit, akrilamit ve stearil metakrilat ile yapılan hidrojellerinin sentezi, hidrojellerin şişme davranışı, şişme kapasitesi, şişmeye pH ve sıcaklığın etkisi incelenmiştir. Son olarak bu hidrojellerin atık sulardan metilen mavisinin uzaklaştırılmasındaki uygulamaları çalışılmıştır.
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