ORTA YOĞUNLUKLU LİF LEVHALARDA KULLANILAN GENİŞLETİLMİŞ VERMİKÜLİTİN TERMAL VE YANGINA DAYANIKLILIK, HİGROSKOPİK, FİZİKSEL VE MEKANİK ÖZELLİKLERİNİN ARAŞTIRILMASI

Yıl 2025, Cilt: 7 Sayı: 2, 12 - 21, 31.12.2025

Seda Nur Demirel , Fatih Mengeloğlu

Öz

Bu çalışmada, iyi bilinen bir yangın dirençli malzeme olan genişletilmiş vermikülit içeren orta yoğunluklu fiber levhanın (MDF) yanıcılık davranışı, sınır oksijen indeksi (LOI), koni kalorimetrisi, formaldehit emisyonu ve perforatör ölçümleri kullanılarak değerlendirilmiştir. Ayrıca, vermikülitin magnezyum alüminosilikat kil minerali olması nedeniyle MDF'nin suyla ilgili özellikleri üzerindeki etkisi araştırılmıştır. MDF paneller melamin-üre-formaldehit (MUF) yapıştırıcı ile yapıştırılmış ve fiziksel ve mekanik özellikleri de karakterize edilmiştir. LOI sonuçları, vermikülit-lif (V/F) oranının artmasıyla oksijen indeksi değerlerinde kademeli bir iyileşme olduğunu göstermiştir. Konik kalorimetre testleri, tutuşma süresinde bir artış ve ısı salım hızında (HRR) bir azalma olduğunu göstererek vermikülitin yangın performansı üzerindeki olumlu etkisini doğruladı. MUF reçinesi kullanılmasına rağmen, paneller nispeten yüksek formaldehit emisyon seviyeleri sergiledi. Ayrıca, V/F içeriğinin artması, MDF yapısı içinde magnezyum alüminosilikat kil minerali olarak genişlemiş vermikülitin varlığına atfedilen kalınlık şişmesi ve su emme davranışında iyileşmeye yol açtı.

Anahtar Kelimeler

Genişletilmiş vermikülit; , Alev geciktirici , Ateşe dayanıklı , Swelling and water absorption

Etik Beyan

Bu makalede sunulan tüm veriler, analizler ve sonuçlar, yazarlar tarafından orijinal olarak üretilmiştir ve başka herhangi bir çalışmadan kopyalanmamış veya uygunsuz bir şekilde türetilmemiştir. Çalışma boyunca kullanılan tüm kaynaklar uygun şekilde alıntılanmıştır. Yazar(lar), bu makalenin mevcut haliyle başka hiçbir dergiye veya platforma sunulmadığını veya incelenmediğini beyan eder. Ayrıca, yazarlar herhangi bir çıkar çatışması olmadığını bildirir ve araştırma süreci boyunca etik ilkelere tam olarak uyulduğunu teyit eder.

Destekleyen Kurum

Kahramanmaras Sütçü İmam Üniversitesi

Teşekkür

Deney çalışmaları, hammadde temini ve laboratuvar testleri konusunda değerli yardımları için Kastamonu Entegre çalışanlarına içten teşekkürlerimi sunarım.

INVESTIGATION OF THERMAL AND FIRE RESISTANCE, HYGROSCOPIC, PHYSICAL, AND MECHANICAL PROPERTIES OF EXPANDED VERMICULITE USED IN MEDIUM-DENSITY FIBERBOARDS

Öz

In this study, the flammability behaviour of medium-density fibreboard (MDF) incorporating expanded vermiculite, a well-known fire-resistant material, was evaluated using limiting oxygen index (LOI), cone calorimetry, formaldehyde emission, and perforator measurements. In addition, the influence of vermiculite on the water-related properties of MDF was investigated, owing to its nature as a magnesium aluminosilicate clay mineral. The MDF panels were bonded with a melamine–urea–formaldehyde (MUF) adhesive, and their physical and mechanical properties were also characterised. The LOI results indicated a progressive improvement in oxygen index values with increasing vermiculite-to-fibre (V/F) ratio. Cone calorimeter tests showed an increase in time to ignition and a reduction in heat release rate (HRR), confirming the positive effect of vermiculite on fire performance. Despite the use of MUF resin, the panels exhibited relatively high formaldehyde emission levels. Furthermore, increasing V/F content led to improved thickness swelling and water absorption behaviour, which is attributed to the presence of expanded vermiculite as a magnesium aluminosilicate clay mineral within the MDF structure.

Anahtar Kelimeler

Expanded vermiculite , Flame retardant , Fire resistant , Swelling and water absorption

Etik Beyan

All data, analyses, and results presented in this article are originally produced by the authors and have not been copied from or improperly derived from any other work. all sources used throughout the study have been properly cited. the author(s) declare that this article has not been submitted to, nor is it under review by, any other journal or platform in its current form. furthermore, the authors report no conflicts of interest and confirm full compliance with ethical principles throughout the research process.

Destekleyen Kurum

Kahramanmaras Sutcu Imam University

Teşekkür

I would like to express my sincere gratitude to the staff of Kastamonu Entegre for their valuable assistance with the experimental work, raw material supply, and laboratory testing.

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