Fotokromik özellikli PVA nanokompozit yüzey üretimi ve karakterizasyonu: Molekül ağırlığın etkisinin incelenmesi

Yıl 2025, Cilt: 40 Sayı: 1, 627 - 638, 16.08.2024

Hayriye Hale Aygün

https://doi.org/10.17341/gazimmfd.1385994

Öz

Bu çalışmada polimer molekül ağırlığının, elektrospun yüzeyin morfolojik ve fotokromik özellikleri üzerindeki etkileri incelenmiştir. Bu amaçla hidroliz dereceleri eş değer ancak molekül ağırlıkları farklı olan polivinil alkol (PVA) polimerleri kullanılarak polimer konsantrasyonu %12 olan polimer çözeltileri hazırlanmış ve bu çözeltilere %4 fotokromik madde ilavesi sonrasında elektrospinning işlemi gerçekleştirilmiştir. Fotokromik madde ilaveli çözeltilerin yoğunlukları ölçülmüş ve UV-Vis spektrofotometrik analizleri gerçekleştirilmiştir. Bu çözeltilerden üretilen elektrospun nanokompozit yüzeylerin yapısal, morfolojik ve UV-Vis karakterizasyonları FTIR, FESEM ve UV-Vis spektrofotometre analizlerinden faydalanılarak incelenmiş ve yüzeylerin kalınlıkları ölçülmüştür. Polimer molekül ağırlığı arttıkça ortalama nanolif çapının ve nanokompozit yüzey kalınlığının arttığı, gözenek boyut varyasyonu yüksek ve daha geniş gözenekli elektrospun yüzeylerin üretildiği tespit edilmiştir. Düşük polimer molekül ağırlığına sahip PVA 5-88 numunesinde, düşük vizkosite değerinden dolayı yüzey düzgünsüzlüğünün bozulduğu ve en ince nanolif üretimin bu numune ile elde edildiği gözlenmiştir. Çalışılan numuneler arasında orta molekül ağrılığa sahip olan PVA 14-88 numunesinin ise çözelti yoğunluğu, üretilen ortalama nanolif çapı değeri, lif çapı/gözenek boyutu ilişkisi ve fotokromik etki açısından elektrospinning işlemi için en uygun molekül ağırlığa sahip PVA polimer tipi olduğu görülmektedir.

Anahtar Kelimeler

Elektrospinning, fotokromizm, molecular weight, nanokompozit, polivinil alkol

Etik Beyan

Bu çalışmanın, deneysel verilere dayanan özgün ve orijinal bir çalışma olduğunu, tüm aşamalarının bilimsel etik ilke ve kurallarına uygun yürütüldüğünü, bu çalışma kapsamında elde edilmeyen tüm veri ve bilgiler için yapılan alıntılara metin içinde ve kaynakçada yer verildiğini; kullanılan verilerde herhangi bir değişiklik yapılmadığını beyan ederim. Bu çalışma orijinal bir araştırma makalesidir ve herhangi başka bir dergi yada yayın evinde değerlendirme yada yayın aşamasında değildir. Herhangi bir zamanda, çalışmayla ilgili yaptığım bu beyana aykırı bir durumun saptanması durumunda, ortaya çıkacak tüm ahlaki ve hukuki sonuçlara razı olduğumu bildiririm.

Destekleyen Kurum

Kahramanmaraş Sütçü İmam Üniversitesi

Proje Numarası

2021/3-25M

Teşekkür

Bu çalışma Kahramanmaraş Sütçü İmam Üniversitesi Bilimsel Araştırmalar ve Projeler Birimi tarafından 2021/3-25M proje numarası ile desteklenmiştir.

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