Nanopartikül Katkılı Biyobazlı Kapsüllenmiş Faz Değiştiren Malzemelerin Sentezi ve Karakterizasyonu

Öz

Faz değiştiren malzemeler (FDM), belirli sıcaklıklarda katı-sıvı faz değişimi yoluyla ısıyı depolayıp serbest bırakabilen sistemlerdir. Bitkisel yağ bazlı FDM’ler, soya, palmiye ve hindistancevizi yağı gibi yenilenebilir kaynaklardan elde edilen, çevre dostu malzemelerdir. Düşük erime sıcaklıkları ve biyolojik uyumlulukları sayesinde yeşil bina sistemleri, gıda taşımacılığı ve medikal alanlarda tercih edilirler. Bu çalışmada, nanopartikül katkılı biyo bazlı kapsüllenmiş faz değiştiren malzemeler hazırlanmıştır. Nanopartikül olarak kil ve TiO₂, biyo bazlı malzeme olarak hindistan cevizi yağı kullanılmıştır. Hazırlanan malzemelerin, morfolojik yüzey analizi taramalı elektron mikroskobu (SEM) ile, termal kararlılıkları termogravimetrik analiz (TGA) ile, camsı geçiş sıcaklıkları/erime sıcaklıkları diferansiyel taramalı kalorimetri (DSC) ve kimyasal yapısı FT-IR tekniği ile karakterize edilmiştir. Elde edilen tüm sonuçlar değerlendirildiğinde; üretilen biyobazlı kapsüllenmiş faz değiştiren üre-formaldehit reçinesinin üstün özelliklere sahip olduğu ve hazırlanan fonksiyonelleştirilmiş malzemenin endüstride kullanılabilecek özelliklerde olduğu sonucuna varılmıştır.

Anahtar Kelimeler

• Faz değiştiren malzeme
• termal depolama
• üre-formaldehit reçine
• kapsülasyon

Synthesis and Characterization of Nanoparticle-Enhanced Bio-Based Encapsulated Phase Change Materials

Öz

Phase change materials (PCM) are systems that can store and release heat through solid-liquid phase change at certain temperatures. Vegetable oil-based PCMs are environmentally friendly materials obtained from renewable resources such as soy, palm and coconut oil. They are preferred in green building systems, food transportation and medical fields due to their low melting temperatures and biological compatibility. In this study, nanoparticle-added bio-based encapsulated phase change materials were prepared. Clay and TiO₂ were used as nanparticles, and coconut oil was used as a bio-based material. The prepared materials were characterized by morphological surface analysis with scanning electron microscopy (SEM), thermal stability with thermogravimetric analysis (TGA), glass transition temperatures/melting temperatures with differential scanning calorimetry (DSC) and chemical structure with FT-IR technique. When all the obtained results were evaluated; it was concluded that the produced bio-based encapsulated phase change urea-formaldehyde resin has superior properties, and the prepared functionalized material has properties that can be used in the industry.

Anahtar Kelimeler

• Phase change material
• thermal storage
• urea-formaldehyde resin
• encapsulation

Kaynakça

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