p(NIPAM) Kriyojelinin Hazırlanışı, Karakterizasyonu ve Termal Özelliklerinin p(NIPAM) Hidrojeli ile Karşılaştırmalı Olarak İncelenmesi
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2020
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info:eu-repo/semantics/openAccess
Özet
Bu çalışmada ilk olarak, süper-gözenekli poli(N-izopropilakrilamit) (p(NIPAM)) kriyojeli, -16°C'dekriyojelasyon yöntemi ile sentezlenmiştir. Polimerizasyon işleminde, NIPAM monomer olarakkullanıldı ve çapraz bağlayıcı olarak N,N'-metilen-bis-akrilamid (MBAAm) tercih edildi. Reaksiyonkoşullarının sağlanabilmesi açısından diğer reaktifler olarak ise reaksiyon redoks başlatıcı çiftiN,N,N,N?-tetrametilen diamin (TEMED) ve amonyum persülfat (APS) varlığında polimerizasyongerçekleştirildi. Hazırlanan p(NIPAM) kriyojellerinin şişme ve makrogözeneklilik testlerininincelenmesinin yanı sıra, Fourier dönüşümlü kızılötesi (FTIR) spektroskopisi ve Yüzey TaramalıElektron mikroskobu ile karakterize edildi. p(NIPAM) kriyojellerinin termal kararlılıklarınınbelirlenebilmesi amacıyla Termal Gravimetrik Analiz (TGA) yöntemlerine başvuruldu. NIPAM bazlıkriyojellerin karakterizasyon ölçümlerinin belirlenmesinden sonra ise kriyojellerin dahil olduğu sınıfolan hidrojellere ait bu kez NIPAM-bazlı hidrojel sentezlenerek aynı koşullar üzerindenkarakterizasyon sonuçları karşılaştırıldı.
In this study, firstly, the super-porous poly (N-isopropylacrylamide) (p(NIPA)) cryogel was synthesized by cryogelling method at -16°C. In the polymerization process, NIPA was used as the monomer and N, N'-methylenebisacrylamide (MBAAm) was preferred as the crosslinker. As other reagents, polymerization was carried out in the presence of reaction redox initiator pair N,N,N,N?- tetramethylene diamine (TEMED) and ammonium persulfate (APS) to ensure the reaction conditions. The p(NIPAM) cryogels were characterized by swelling and macroporosity tests, as well as Fourier transform infrared (FTIR) spectroscopy and Surface Scanning Electron Microscopy. Differential Scanning Calorimetry (DSC) and Thermal Gravimetric Analysis (TGA) methods were used to determine the thermal stability of p(NIPAM) cryogels. After determining the characterization measurements of NIPA based cryogels, this time NIPAM-based hydrogel, which belongs to the class of hydrogels including cryogels, was synthesized and the results were compared over the same conditions.
In this study, firstly, the super-porous poly (N-isopropylacrylamide) (p(NIPA)) cryogel was synthesized by cryogelling method at -16°C. In the polymerization process, NIPA was used as the monomer and N, N'-methylenebisacrylamide (MBAAm) was preferred as the crosslinker. As other reagents, polymerization was carried out in the presence of reaction redox initiator pair N,N,N,N?- tetramethylene diamine (TEMED) and ammonium persulfate (APS) to ensure the reaction conditions. The p(NIPAM) cryogels were characterized by swelling and macroporosity tests, as well as Fourier transform infrared (FTIR) spectroscopy and Surface Scanning Electron Microscopy. Differential Scanning Calorimetry (DSC) and Thermal Gravimetric Analysis (TGA) methods were used to determine the thermal stability of p(NIPAM) cryogels. After determining the characterization measurements of NIPA based cryogels, this time NIPAM-based hydrogel, which belongs to the class of hydrogels including cryogels, was synthesized and the results were compared over the same conditions.
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Düzce Üniversitesi Bilim ve Teknoloji Dergisi
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Cilt
8
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2
