POLİETİLEN NANOKOMPOZİTLERDE NANO TABAKALI BOR NİTRÜR (BNNS) TAKVİYESİNİN BİYOBOZUNURLUĞA ETKİSİ

Year 2022, Volume: 30 Issue: 2, 280 - 288, 18.08.2022

Zuhal Yılmaz , Nuran Ay

https://doi.org/10.31796/ogummf.1078998

Abstract

Polietilen (PE) kısmi termoplastik bir malzemedir. Polietilen plastik filmler mükemmel ısıl ve mekanik özellikleri ve düşük fiyatından dolayı ticari olarak geniş kullanım alanına sahiptirler. Hekzagonal bor nitrür (hBN) grafite benzer tabakalı bir yapıdadır, süper katı yağlayıcı, UV ışın yayıcı veya kompozitlerde ısıl iletkenlik artırıcı ajan olarak kullanılabilir. Bunlara ek olarak termoplastik polimerlerin ekstrüzyon tekniği ile üretiminde, ergime kırılması ve akışkan kararsızlığını önlemek için kullanımları yaygınlaşmaktadır. hBN’ün mikro boyutlu tanelerinin kimyasal eksflasyonu ile elde edilen, üstün mekanik ve ısıl özelliklere sahip nano tabakalı bor nitrür (BNNS), polimerlerin ısıl, bariyer ve mekanik özelliklerini iyileştirmek için dolgu maddesi olarak kullanımı literatürde yerini almıştır. Alçak yoğunluklu polietilen (AYPE) filmlerin kullanımından sonra biyobozunurlukları üzerinde çeşitli çalışmalar vardır. AYPE-BNNS içeren kompozit filmlerin biyobozunurlukları ile ilgili bir çalışmaya rastlanmamıştır. Bu çalışmada, daha önce ekstrüzyon yöntemi ile hazırlanmış ve karakterizasyon testleri yapılmış olan BNNS içeren AYPE nanokompozit filmlerin biyobozunurluk özelliklerinin belirlenmesi incelenmiştir. Biyobozunurluk analizleri ASTM D 5988-03 (Standard Test Method for Determining Aerobic Biodegradation in Soil of Plastic Materials After Composting)’e göre yapılmıştır. Biyobozunurluk analizleri ile bulunan CO2 miktarının / elementel analiz sonucu bulunan teorik CO2 miktarına oranı yüzde (%) biyobozunurluk olarak hesaplanmıştır.

Keywords

Biyobozunurluk, BNNS, Polietilen film, Nanokompozit PE film, Toprak bozunması

Supporting Institution

Anadolu Üniversitesi Bilimsel Araştırma

Project Number

1306F175

Thanks

Yazarlar, Anadolu Üniversitesi Bilimsel Araştırma projesi no 1306F175 ile bu çalışmasının yapılmasına destekleri için Anadolu Üniversitesine teşekkür ederler.

EFFECT OF NANO-LAYERED BORON NITRIDE (BNNS)ADDITION ON BİODEGRADABİLİTY PROPERTİES OF POLYETHYLENE NANOCOPOSIDES

Abstract

Polyethylene (PE) is a partial thermoplastic material. Hexagonal boron nitride (hBN) is a layered structure similar to graphite. hBN is used as super solid lubricants, UV radiators or thermal conductivity enhancing agents in composites. The use of nano-layered boron nitride (BNNS), which is obtained by chemical exflation of hBN's micro-sized grains with has superior mechanical and thermal properties, has taken place in the literature as filler for improving polymer barrier, thermal and mechanical properties. However, in the literature on the biodegradability of composite films containing (LDPE)BNNS study hasn't been found. In this study, the determination of biodegradability properties of LDPE nanocomposite films containing BNNS, which were previously prepared by extrusion method and characterization tests were carried out, were investigated. Biodegradability analysis were performed according to ASTM D 5988-03 (Standard Test Method for Determining Aerobic Biodegradation of Plastic Materials after Composting in Soil) between 2-99 days. The humidity ratio was set to 65% for the biometer flasks containing 100 g of soil and 0.2 g of sample. In order for biodegradability to occur, the C:N adjustment was made at a ratio of 15:1 using di ammonium hydrogen phosphate ((NH4)2HPO4) in the soil. The amount of CO2 formed as a result of biodegradability was calculated by analyzing with the titration method. The ratio of the amount of CO2 found by biodegradability analyzes to the theoretical amount of CO2 found as a result of elemental analysis was calculated as percentage (%) biodegradability. The biodegradability of the sample containing 1% BNNS, it was determined to be less than the sample without BNNS and the negative sera nylon, 0.83% and 0.99%, respectively. After the analysis of biodegradability, the XRD peak intensities of LDPE and hBN was determined decrease due to the change in the polymer structure. In the FTIR results, band formations were observed at new wavelengths due to oxidized fragments containing OH groups resulting from biodegradation. With the addition of hBN, it was determined that the barrier, thermal and mechanical properties were improved, the polymer structure became more resistant to microorganisms and increased its service life.

Keywords

biodegradability,, BNNS,, Polyethylene film

Project Number

1306F175

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