Mugla Journal of Science and Technology

2149-3596

Mugla Sitki Kocman University

10.22531/muglajsci.606112

Engineering

Mühendislik

EFFECT OF SILICA OBTAINED FROM RICE HUSK ON THE STRUCTURAL AND THERMAL PROPERTIES OF POLYLACTIC ACID/POLYETHYLENE GLYCOL FILMS

https://orcid.org/0000-0001-5104-1484

Aydın

Buğçe

ONDOKUZ MAYIS UNIVERSITY

https://orcid.org/0000-0003-4789-1026

Geyikçi

Feza

ONDOKUZ MAYIS UNIVERSITY

12 11 2019

5 2 91 96 08 18 2019 10 17 2019

2015

Mugla Journal of Science and Technology

Ambalaj sektöründe kullanılan plastikmalzemelerin çoğu petrol kökenlidir. Bu tür malzemeler doğada uzun yıllarçözünmeyip atmosferdeki CO2’in artmasına neden olur. Yenilenebilirkaynaklardan elde edilen polilaktik asit (PLA) benzeri biyobozunur polimerlerpetrol kökenli polimerlere alternatif olarak görülmektedir. PLA çevre dostu,biyobozunur ve biyouyumlu olması gibi birçok avantaja sahip olmasına rağmendüşük gaz bariyer özellikleri, termal dayanımı, kırılgan ve maliyetli olmasıbirçok uygulamada kullanımını sınırlamaktadır. Bu çalışmada ilk olarak atıkolarak görülen pirinç kabuğundan silika elde edilmiştir. Farklı katkıyüzdelerinde (%5, 10 ve 20) silika %20 polietilen glikol (PEG) içeren PLAçözeltilerine eklenmiş ve kompozit filmler çözücü döküm yöntemi ilehazırlanmıştır. Filmlerin termal ve yapısal özellikleri Fourier Dönüşümlüİnfrared Spektroskopi (FT-IR), Taramalı Elektron Mikroskobu (SEM),Termogravimetrik Analiz (TGA), Diferansiyel Taramalı Kalorimetre (DSC) ve SuAbsorpsiyon Kapasitesi Testi ile belirlenmiştir. Analiz sonuçlarına göre,silikanın PLA-PEG filmlerinin termal dayanımını iyileştirdiği ve su tutmakapasitelerini artırdığı görülmüştür.

Most of the plastic materials used in thepackaging industry are petroleum-based. These plastics do not decompose in soilfor many years and they lead to increase CO2 in the atmosphere.Biodegradable polymers derived from renewable resources such as polylactic acid(PLA) are considered as promising alternatives to petroleum-based polymers.Although PLA has attracted attention due to having properties such as biodegradable,environment friendly, and biocompatible, it cannot be used in many applicationsdue to its poor gas barrier properties, low thermal stability, high brittleness,and cost. In this study, in the first step silica was obtained from the ricehusk. The obtained silica (5,10 and 20%) were added to PLA solutions containing20% polyethylene glycol (PEG) and the composite films were prepared usingsolvent casting method. The thermal and structural properties of the compositefilms were determined by Fourier Transform Infrared Spectroscopy (FT-IR),Scanning Electron Microscope (SEM), Thermogravimetric Analysis (TGA),Differential Scanning Calorimetry (DSC) and Water Absorption Capacity Test.According to results of analysis, the addition of silica to the PLA-PEG filmsimproved the thermal stability and increased the water absorption capacities offilms.

Polylactic acid Rice husk Silica Biodegradable polymer Composite material

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