FABRICATION OF PSF/SiO2 NANOCOMPOSITE MEMBRANE AND APPLICATION IN APPLE JUICE CLARIFICATION PROCESS

Öz

In this study, PSF/PEI (20/2% w/w) membranes which were fabricated by using phase inversion method were modified with using SiO₂ nanoparticles at different concentrations (0.01, 0.03, 0.05% w/w) and performance of fabricated nanocomposite membranes were evaluated in clarification of turbid apple juice. Membrane experiments were conducted using dead-end filtration process. Fabricated new generation nanocomposite membranes were characterized in terms of pure water flux, SEM and water contact angle. Moreover, clarified apple juice samples obtained from fabricated PSF/PEI/SiO₂ new generation nanocomposite membranes were characterized in terms of color (Pt-Co), turbidity (NTU) and total soluble solid content (Brix) and these samples were compared to clarified apple juice samples  supplied from Döhler Inc. in terms of these parameters. According to the obtained results, the membrane produced by adding 0.01% SiO₂ was determined as the membrane having the highest pure water flux and highest hydrophilicity. At the same time, this membrane showed the best performance in apple juice clarification experiments by producing apple juice which had the highest color and total solid matter content and lowest turbidity value.

Anahtar Kelimeler

• nanocomposite membrane,SiO2 nanoparticle,clarification,apple juice

PSF/SiO2 NANOKOMPOZİT MEMBRAN ÜRETİMİ VE ELMA SUYU BERRAKLAŞTIRMA PROSESİNDE KULLANIMI

Öz

Bu çalışmada faz dönüşümü yöntemi kullanılarak üretilen PSF/PEI (%20/2, w/w) membranlar, farklı konsantrasyonlarda SiO₂ nanopartikülü (%0,01; 0.03; 0.05) kullanılarak modifiye edilmiş ve üretilen nanokompozit membranların bulanık elma suyunun berraklaştırılmasında performansları değerlendirilmiştir. Membran deneyleri sonlu filtrasyon sistemi kullanılarak gerçekleştirilmiştir. Üretilen yeni nesil nanokompozit membranlar saf su akı değerleri, SEM ve yüzey temas açı değerleri açısından karakterize edilmiştir. Aynı zamanda, üretilen PSF/PEI/SiO₂ yeni nesil nanokompozit membrandan elde edilen berrak elma suyu örnekleri renk (Pt-Co), bulanıklık(NTU) ve toplam suda çözünür kuru madde bakımından karakterize edilmiştir ve Döhler Gıda San. A.Ş.’den temin edilen berrak elma suyu örnekleri (Brix) ile bu parametreler açısından karşılaştırılmıştır. Elde edilen sonuçlara göre %0,01 oranında SiO₂ ilave edilerek üretilen PSF/PEI/SiO₂ membranın en yüksek saf su akısına ve en yüksek hidrofilikliğe sahip olduğu belirlenmiştir. Aynı zamanda bu membrandan elde edilen berrak meyve suyu örneği en yüksek renk ve toplam suda çözünür kuru madde sahipken aynı zamanda en düşük bulanıklık değeri ile elma suyu berraklaştırma deneylerinde de en iyi performansı sergilemiştir. 

Anahtar Kelimeler

• nanokompozit membran,SiO2 nanopartikül,berraklaştırma,elma suyu

Kaynakça

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