Kitosan ve polivinil alkol içeren polimerik kompozit absorban köpük üretimi ve karakterizasyonu

Öz

Bu çalışmada, kitosan (KS), polivinil alkol (PVA) ve pirinç kabuğu külü (PK) kullanılarak polimerik kompozit köpükler sentezlenmiş ve yağ absorpsiyonunda değerlendirilmiştir. Yağ absorpsiyon kapasitesi ve köpüğün yapısal özellikleri üzerindeki etkilerini belirlemek amacıyla KS/PVA oranı, karışım içerisindeki PK yüzdesi ve çapraz bağlayıcı (sodyum tripolifosfat, STPP) miktarı parametreleri sırasıyla 92/8-8/92 (h/h), %1,6-%18,4 ve 10,72-39,28 mg STPP/g KS aralıklarında değiştirilmiştir. Değişkenler arasındaki ilişki yanıt yüzey metodunu kullanarak incelenmiştir. Deneysel tasarım ve optimizasyon sürecinde Minitab®21 programı kullanılmış anlamlılık düzeyi %95 olarak uygulanmıştır. Sonuçlara göre, yağ absorbsiyon kapasitesinin belirlenmesinde en etkili parametreler anlamlılık sırasıyla KS/PVA oranı ve KS/PVA ile PK yüzdesi arasındaki ikili etkileşim olarak saptanmıştır. Optimum kompozit köpük bileşimi 92/8 KS/PVA oranı, %1,6 PK yüzdesi ve 25 mg STPP/g KS olarak belirlenmiştir. Bu şartlar altında sentezlenen köpüğün yağ absorplama kapasitesi kuadratik model ile 23,30 g/g olarak öngörülürken, deneysel sonuç 22,48 ±0,11 g/g olarak kaydedilmiştir. SEM görüntüleri, yapıya %1,6 PK katkısının homojen gözenek oluşumuna katkıda bulunduğunu, daha fazla katkının ise tıkanmaya neden olduğunu kanıtlamıştır. FTIR analizi KS ve STPP arasındaki çapraz bağların yanı sıra Si-O-C ve Si-O-Si köprülerinin varlığını doğrulamıştır.

Anahtar Kelimeler

• Kompozit biyopolimerik köpük
• yanıt yüzey tasarımı
• yağ absorpsiyonu

Destekleyen Kurum

Marmara Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimi

Proje Numarası

11721

Etik Beyan

Bu çalışmanın, özgün bir çalışma olduğunu; çalışmanın hazırlık, veri toplama, analiz ve bilgilerin sunumu olmak üzere tüm aşamalarından bilimsel etik ilke ve kurallarına uygun davranıldığını; bu çalışma kapsamında elde edilmeyen tüm veri ve bilgiler için kaynak gösterildiğini ve bu kaynaklara kaynakçada yer verildiğini; kullanılan verilerde herhangi bir değişiklik yapılmadığını, çalışmanın Committee on Publication Ethics (COPE)' in tüm şartlarını sağladığını beyan ederim.

Teşekkür

Marmara Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon birime desteklerinden dolayı teşekkürlerimizi sunarız. (Proje no: 11721)

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