Emrah PEŞMAN, Mürşit TUFAN

Silika ile kuşelenmiş atık kâğıtların plastik kompozit üretiminde değerlendirilmesi

Bu çalışmada silika ile kaplanmış atık kağıt liflerinin dolgu maddesi olarak polietilen kompozit içerisinde değerlendirilebilme olanakları araştırılmıştır. Lif plastik kompozitlerin fiziksel, termal ve bazı mekanik özellikleri üzerine atık kağıtların içeriğinde bulunan silika kuşe tabakasının etkileri incelenmiştir. Bu kapsamda yüksek yoğunluklu polietilen (YYPE) içerisine % 40 oranında mineral içermeyen saf selüloz lifleri ile farklı oranlarda mineral içeren selüloz lifleri eklenmiştir. Kompozit levhaların içeriğinde yer alan mineral miktarı (SiO2-CaCO3) yaklaşık %0, %2.67, %4.95, %7.28 ve %9.73 civarında hesaplanmıştır. Silika ve dolgu maddesi miktarının artması ile plastik kompozitlerin su alma ve kalınlığına şişme değerlerinde önemli miktarda azalma meydana gelmiştir. Termal özelliklerinde ise kısıtlı bir artış olmuştur. Ayrıca kullanılan lifler ve üretilen kompozit örnekleri FTIR-ATR ve SEM-EDS ile karakterize edilmiştir

Utilization of silica coated waste paper fibre in plastic composite production

In this study, utilization of silica coated waste paper fibers as filler in high density polyethylene matrix were investigated. The effects of silica coating pigment in paper on physical, thermal and some mechanical properties of cellulose fiber-plastic composite were examined. The filler used in this study were uncoated cellulose, 6.68%, 12.38%, 18.21% and 24.32% mineral contented cellulose fibers. Each filler type was mixed with high density polyethylene (HDPE) at 40% by weight fiber loading. In this case, the ratio of SiO2-CaCO3 in plastic composites were calculated as 0%, 2.67%, 4.95%, 7.28% and 9.73% respectively. Water absorption and thickness swelling of fiber-plastic composites were significantly decreased with the silica and filler concentrations. With increased mineral content, thermal properties of fiber-plastic composites increased slightly. In addition, fibers and fiber-plastic composites were characterized with FTIR-ATR and SEM-EDS

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