İletken hidrojel kompozitlerin sentezlenmesi ve karakterizasyonu
Yükleniyor...
Dosyalar
Tarih
2023
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
İnönü Üniversitesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Tez çalışması kapsamında, yapısında farklı miktarlarda indirgenmiş grafen oksit (rGO) içeren elektriksel iletkenliğe sahip poli(Akrilamid)/aljinat/Kristalin nano selüloz/rGO (PAAm/Alj/KNS/rGO) hidrojelleri sentezlenmiştir. Bu hidrojel kompozit sistemde kullanılan poliakrilamid, hidrojelin ana destek malzemesini oluşturmaktadır. Sodyum aljinat (Alj) ve kristalin nano selüloz (KNS) hidrojele esneklik ve gerilebilirlik özellikler kazandırması amacıyla kullanılmıştır. Polianilin (PANİ) hidrojele elektriksel iletkenlik, rGO ise elektriksel iletkenlik, mekanik dayanım ve anilin için destek malzemesi olması amacıyla kullanılmıştır. Hidrojel kompozit sistemlerin sentezlenmesi iki aşamada gerçekleştirilmiştir. Önce yapısında farklı oranlarda rGO bulunan sekiz adet PAAm/Alj/KNS/rGO hidrojelleri çözeltide radikal polimerizasyonu yöntemi ile sentezlenmiştir. Daha sonra bu hidrojeller anilin monomeri çözeltisine daldırılıp anilin emdirilerek, anilinin polimerleşmesi ile PAAm/Alj/KNS/rGO/PANİ kompozitleri üretilmiştir. Sentezlenen rGO'nun yapısal karakterizasyonu XRD, EDX ve haritalama (Mapping) analiz teknikleri, PAAm/Alj/KNS/rGO/PANİ kompozit sistemin yapısal karakterizasyonu ise FT-IR ve SEM analiz teknikleri kullanılarak yapılmıştır. Sentezlenen tüm hidrojel kompozit sistemlere şişme ve mekanik testler uygulanarak dengede şişme değerleri ve mekanik dayanımları saptanmıştır. PAAm/Alj/KNS/rGO ve PAAm/Alj/KNS/rGO/PANİ hidrojel kompozilerinin elektriksel iletkenliklerini ölçmek içim farklı frekanslardaki elektriksel dirençleri ölçülmüştür. Hidrojel yapısına PANİ girmesiyle hidrojel kompozitlerin elektriksel iletkenliklerinde önemli derecede artış olmasından dolayı PAAm/Alj/KNS/rGO/PANİ hidrojel kompozilerinin %25, %50, %75 ve %100 şişme değerindeki elektriksel iletkenlikleri incelenmiştir. Yapılan elektriksel iletkenlik testleri sonucunda hidrojel bileşiminin ve hidrojel şişme değerinin elektriksel iletkenlik üzerine etkisinin yüksek olduğu saptanmıştır. Sentezlenen hidrojel kompozitlerin gerinim sensörü ve EKG elektrotu olarak uygulanabilme potansiyeline sahip olduğu saptanmıştır.
Within the scope of the thesis, electrically conductive PAAm/Alg/CNC/rGO/PANI hydrogels containing reduced graphene oxide (rGO) in different amounts in its structure were synthesized. The polyacrylamide used in this hydrogel composite system is the main support material of the hydrogel. Sodium alginate (Alg) and crystalline nanocellulose (CNC) have been used to impart flexibility and stretchability to the hydrogel. poly(aniline) (PANI) has been used to provide electrical conductivity to the hydrogel. rGO has been used for electrical conductivity, mechanical strength and as a support material for aniline. The synthesis of hydrogel composite systems was carried out in two stages. First, eight PAAm/Alg/CNC/rGO hydrogels with different ratios of rGO in their structure were synthesized by solution radical polymerization method. Then, these hydrogels were immersed in aniline monomer solution and impregnated with aniline, and PAAm/Alg/CNC/rGO/PANI composites were produced by polymerization of aniline. Structural characterization of synthesized rGO was performed using XRD, EDX and mapping analysis techniques, and structural characterization of PAAm/Alg/CNC/rGO/PANI composite systems were performed using FT-IR and SEM analysis techniques. Swelling and mechanical tests were applied to all synthesized hydrogel composite systems to determine their equilibrium swelling values and mechanical strength. In order to measure the electrical conductivity of PAAm/Alg/CNC/rGO and PAAm/Alg/CNC/rGO/PANI hydrogel composites, electrical resistances at different frequencies were measured. Electrical conductivities of PAAm/Alg/CNC/rGO/PANI hydrogel composites at 25%, 50%, 75% and 100% swelling values were investigated due to the significant increase in electrical conductivity of hydrogel composites with the incorporation of PANI into the hydrogel structure. As a result of the electrical conductivity tests, it was determined that the hydrogel composition and the hydrogel swelling value had a high effect on the electrical conductivity. It has been determined that the synthesized hydrogel composites have the potential to be applied as strain sensors and ECG electrodes.
Within the scope of the thesis, electrically conductive PAAm/Alg/CNC/rGO/PANI hydrogels containing reduced graphene oxide (rGO) in different amounts in its structure were synthesized. The polyacrylamide used in this hydrogel composite system is the main support material of the hydrogel. Sodium alginate (Alg) and crystalline nanocellulose (CNC) have been used to impart flexibility and stretchability to the hydrogel. poly(aniline) (PANI) has been used to provide electrical conductivity to the hydrogel. rGO has been used for electrical conductivity, mechanical strength and as a support material for aniline. The synthesis of hydrogel composite systems was carried out in two stages. First, eight PAAm/Alg/CNC/rGO hydrogels with different ratios of rGO in their structure were synthesized by solution radical polymerization method. Then, these hydrogels were immersed in aniline monomer solution and impregnated with aniline, and PAAm/Alg/CNC/rGO/PANI composites were produced by polymerization of aniline. Structural characterization of synthesized rGO was performed using XRD, EDX and mapping analysis techniques, and structural characterization of PAAm/Alg/CNC/rGO/PANI composite systems were performed using FT-IR and SEM analysis techniques. Swelling and mechanical tests were applied to all synthesized hydrogel composite systems to determine their equilibrium swelling values and mechanical strength. In order to measure the electrical conductivity of PAAm/Alg/CNC/rGO and PAAm/Alg/CNC/rGO/PANI hydrogel composites, electrical resistances at different frequencies were measured. Electrical conductivities of PAAm/Alg/CNC/rGO/PANI hydrogel composites at 25%, 50%, 75% and 100% swelling values were investigated due to the significant increase in electrical conductivity of hydrogel composites with the incorporation of PANI into the hydrogel structure. As a result of the electrical conductivity tests, it was determined that the hydrogel composition and the hydrogel swelling value had a high effect on the electrical conductivity. It has been determined that the synthesized hydrogel composites have the potential to be applied as strain sensors and ECG electrodes.
Açıklama
Anahtar Kelimeler
Kaynak
WoS Q Değeri
Scopus Q Değeri
Cilt
Sayı
Künye
Oruç, S. (2023). İletken hidrojel kompozitlerin sentezlenmesi ve karakterizasyonu. Yayınlanmış Yüksek Lisans Tezi. İnönü Üniversitesi, Malatya.
