Yıl 2020, Cilt 8 , Sayı 1, Sayfalar 229 - 239 2020-03-20

N-HEKZADEKAN/MONTMORİLLONİT KOMPOZİT FAZ DEĞİŞTİREN MADDELERİN HAZIRLANMASI VE ÖZELLİKLERİNİN BELİRLENMESİ
PREPARATION OF N-HEXADECANE/MONTMORILLONITE COMPOSITE PHASE CHANGE MATERIALS AND DETERMINATION OF ITS PROPERTIES

Hatice Hande MERT [1] , Mehmet Selçuk MERT [2] , Emine Hilal MERT [3]


Faz değiştiren maddeler (FDMler), ısıl enerjinin faz değişimi esnasında sabit sıcaklıkta gizli ısı olarak depolanmasına ve gerektiğinde ortama salınmasına izin veren önemli fonksiyonel malzemelerdir. Kimyasal bileşimine göre organik, inorganik ve ötektik olmak üzere sınıflandırılan faz değiştiren maddelerden organik faz değiştiren maddeler sınıfında yer alan parafinler, yüksek gizli ısı depolama kapasiteleri, iyi faz değişim performansları, ısıl ve kimyasal kararlılıklarıyla ısıl enerji depolama uygulamalarında kullanım amacıyla oldukça dikkat çeken malzemelerdir. Ancak, bu malzemelerin faz değişimi esnasında gösterdikleri büyük hacim değişimi ve muhtemel sızdırma probleminden ötürü mikro ya da makro boyutta kapsülasyon işlemine gerek duyulmaktadır. Bunun yanı sıra, çeşitli yapıda nano dolgularla bu malzemelerin yapısal, kimyasal ve ısıl olarak kararlılıklarının arttırılması da mümkündür. Bu çalışmada, n-hekzadekan/modifiye montmorillonit kompozit faz değiştiren maddeler faz inversiyon emülsifikasyonu yöntemiyle hazırlanmıştır. Bu amaçla, faz değiştiren madde olarak n-hekzadekan, farklı katkı oranlarında emülsiyon sistemine ilave edilen, yüzey modifiye montmorillonit (MMT) kili varlığında poli(stiren-ko-divinilbenzen) kopolimer kabuk içerisinde mikro boyutta kapsüllenmiştir. Hazırlanan mikrokapsüllerin ısıl, morfolojik ve yapısal özellikleri incelenmiştir. Analiz sonuçları, elde edilen kompozit malzemelerin sahip oldukları ısıl enerji depolama kapasiteleri ve uygun faz değişim sıcaklıkları yanında yüksek ısıl kararlılıklarıyla düşük sıcaklıktaki (18-30˚C) ısıtma ve soğutma sistemlerinde enerji depolanması amacıyla kullanılabilecek potansiyel birer aday olduğunu göstermiştir. 

Phase change materials (PCMs) are important functional materials that allow heat to be stored as a latent heat at a constant temperature during phase change and to be released into the environment as when needed. Within phase change materials classified as organic, inorganic and eutectic according to the chemical composition, paraffins in the class of organic phase change materials are highly remarkable materials for use in thermal energy storage applications due to their high latent heat storage capacities, good phase change performance, and with possessed thermal and chemical stability. On the other hand, micro- or macro-sized encapsulation is required due to the large volume changes and possible leakage problems of these materials during phase change period. Furthermore, it is possible to increase the structural, chemical and thermal stability of these materials with nano fillers of various structures. In this study, n-hexadecane / modified montmorillonite composite phase change materials were prepared by phase inversion emulsification method. For this purpose, n-hexadecane as the phase change material was encapsulated in micro-size in the poly(styrene-co-divinylbenzene) copolymer shell in the presence of surface modified montmorillonite (MMT) clay, which was added to the emulsion system at different loading amounts. Thermal, morphological and structural properties of microcapsules were investigated. The results of the analysis showed that the obtained composite materials are the potential candidates for the storage of energy in heating and cooling systems operated at low temperature (18-30˚C) on account of their thermal energy storage capacities and suitable phase change temperatures as well as their high thermal stability. 

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Birincil Dil tr
Konular Mühendislik, Kimya
Yayımlanma Tarihi 2020 Mart 8(1)
Bölüm Araştırma Makalesi \ Research Makaleler
Yazarlar

Orcid: 0000-0003-0743-1981
Yazar: Hatice Hande MERT (Sorumlu Yazar)
Kurum: YALOVA ÜNİVERSİTESİ, MÜHENDİSLİK FAKÜLTESİ, KİMYA VE SÜREÇ MÜHENDİSLİĞİ BÖLÜMÜ
Ülke: Turkey


Orcid: 0000-0002-8646-0133
Yazar: Mehmet Selçuk MERT
Kurum: YALOVA ÜNİVERSİTESİ, MÜHENDİSLİK FAKÜLTESİ, ENERJİ SİSTEMLERİ MÜHENDİSLİĞİ BÖLÜMÜ
Ülke: Turkey


Orcid: 0000-0003-4267-7469
Yazar: Emine Hilal MERT
Kurum: YALOVA ÜNİVERİSİTESİ, MÜHENDİSLİK FAKÜLTESİ, POLİMER MÜHENDİSLİĞİ BÖLÜMÜ
Ülke: Turkey


Tarihler

Başvuru Tarihi : 1 Şubat 2019
Kabul Tarihi : 4 Ekim 2019
Yayımlanma Tarihi : 20 Mart 2020

APA MERT, H , MERT, M , MERT, E . (2020). N-HEKZADEKAN/MONTMORİLLONİT KOMPOZİT FAZ DEĞİŞTİREN MADDELERİN HAZIRLANMASI VE ÖZELLİKLERİNİN BELİRLENMESİ. Mühendislik Bilimleri ve Tasarım Dergisi , 8 (1) , 229-239 . DOI: 10.21923/jesd.519408