Mustafa ASLAN, Hasan ÖZTÜRK, Cenk DEMİRKIR

Investigation of Thermal Conductivity of Wood Sandwich Panels with Aluminium and Polypropylene Core

Sandviç paneller, iki ince ve sert alt ve üst yüzey tabakasının arasına kalın fakat hafif çekirdek malzeme yerleştirilerek elde edilir. Sandviç paneller, özellikle hafiflikleri, yüksek "kuvvet / ağırlık" oranları ve geleneksel malzemelere göre dayanıklılıkları nedeniyle havacılık ve uzay endüstrisi, denizcilik, otomotiv ve inşaat endüstrisi gibi birçok kullanım alanına sahiptir. Sandviç malzemelerin, farklı uygulamalar için alt ve üst yüzey katmanları ve çekirdeği seçilerek farklı malzemelerden ve geometrik yapılardan elde edilebileceği, en büyük avantajlardan biridir. Bu çalışmanın amacı, farklı yüzey ve çekirdek malzemeleri ile üretilen sandviç panellerin ısıl iletkenlik değerlerini araştırmaktır. Çekirdek malzeme olarak, alüminyum ve polipropilen; kızılağaç, huş ve sarıçam kaplamaları, sandviç panellerin üretiminde yüzey panelleri olarak kullanılmıştır. Çekirdek tabakanın her iki yüzey tabakasına yapışması için poliüretan ile modifiye edilmiş bir epoksi yapıştırıcı kullanılmıştır. Sandviç panellerin ısıl iletkenliği ASTM C 518 ve ISO 8301'e göre belirlenmiştir. Çalışma sonucunda, en yüksek ısıl iletkenlik değerleri, alüminyum çekirdekli sandviç panellerinden elde edilmiştir. Alüminyum çekirdekli paneller için kızılağaçtan en yüksek değerler elde edilmiş ve polipropilen çekirdekli paneller için çam ağacından elde edilmiştir.

Anahtar Kelimeler:

Alüminyum, Çekirdek, Isıl İletkenlik, Sandviç Panel, Polipropilen

Investigation of Thermal Conductivity of Wood Sandwich Panels with Aluminium and Polypropylene Core

Sandwich panels are obtained by placing thick but rather light core material between two thin and rigid lower and upper surface layers. Sandwich panels, especially due to their light weight, high "strength / weight" ratio and durability compared to conventional materials have many use areas such as aviation and space industry, maritime, automotive and building industry. It is one of the biggest advantages that sandwich materials can be obtained from different materials and geometric structures by choosing the lower and upper surface layers and the core for various applications. The aim of this study is to investigate the thermal conductivity values of the sandwich panels, which are manufactured with different types of surface and core materials in sandwich panels. An aluminium and polypropylene as a core materials and alder, birch and scots pine wood veneers were used as wood species for surface panels for manufacturing of sandwich panels. A polyurethane modified epoxy- adhesive were used for binding of core layer to both surface layers. Thermal conductivity of sandwich panels was determined according to ASTM C 518 & ISO 8301. As a result of the study, the highest thermal conductivity values were obtained from aluminium core sandwich panels. The highest values were obtained from alder for the aluminium core panels and scots pine for the polypropylene core panels as wood species.

Keywords:

Aluminium, Core, Polypropylene, Sandwich Panel, Thermal Conductivity,

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