Evaluation of Polycaprolacton/Halloysite Films Containing Boric Acid, Citric Acid, Ascorbic Acid as Packaging Materials

Öz

The using of biopolymers as packaging materials is limited because they have low mechanical, thermal and barrier properties. This limitation can be eliminated by adding fillers to the biopolymers to prepare bionanocomposites. In this study, PCL/HAL films were prepared by solvent casting method by mixing 0.5% (w/v) and halloysite (HAL) to pure PCL. Structural (ATR-FTIR and XRD), thermal (TGA) and mechanical (tensile strength, hardness) analysis were performed on these films. Tmelting, hardness and tensile strength of PCL/HAL films increased compared to pure PCL films. To investigate the antimicrobial effect of PCL films, boric acid, citric acid and ascorbic acid (% 0.25) were added to PCL/HAL films. The antimicrobial effect of these films was investigated against gram positive Staphylococcus aureus 29213 and gram negative Escheria coli 35218 bacteria. As a result of the antimicrobial activity test, it was observed that the amount of boric acid, citric acid and ascorbic acid added to the films did not show sufficient inhibition effect. As a result, the addition of HAL to pure PCL caused an increase in the mechanical properties of the films. Therefore it is thought to have potential to be used as packaging material.

Anahtar Kelimeler

• Polycaprolacton,HALe,packaging material,organic acid

Borik Asit, Sitrik Asit, Askorbik Asit İçeren Polikaprolakton/Halloysit Filmlerin Ambalaj Malzemesi Olarak Değerlendirilmesi

Öz

Biyopolimerlerin ambalaj malzemesi olarak kullanımı düşük mekanik, termal ve bariyer özelliklere sahip olması nedeniyle kısıtlıdır. Bu kısıtlama biyopolimerlere dolgu malzemeleri eklenerek giderilebilmektedir. Bu çalışmada saf polikaprolakton (PCL) ve % 0,5 w/v oranında halloysit (HAL) karıştırılarak, PCL/HAL filmler çözelti döküm yöntemiyle hazırlanmıştır. Bu filmlere yapısal (ATR-FTIR ve XRD), termal (TGA) ve mekanik (çekme-kopma, sertlik) testler yapılmıştır. PCL/HAL filmlerin Terime sıcaklığı, sertlik ve gerilme dayanımlarında saf PCL filmlere göre artış gözlenmiştir. PCL filmlerin antimikrobiyal etkisini incelemek için PCL/HAL filmlere borik asit, sitrik asit ve askorbik asit (% 0,25) eklenmiştir. Bu filmlerin antimikrobiyal etkisi gram pozitif Staphylococcus aureus 29213 ve gram negatif Escheria coli 35218 bakterilerine karşı incelenmiştir. Antimikrobiyal aktivite deneyi sonucunda filmlere eklenen borik asit, sitrik asit ve askorbik asit miktarının yeterli inhibisyon etkisi gösteremediği gözlenmiştir. Sonuç olarak saf PCL’ye HAL eklenmesi filmlerin mekanik özelliklerinde artışa sebep olmuştur ve bu nedenle ambalaj malzemesi olarak kullanılabilir potansiyele sahip olduğu düşünülmektedir.  

Anahtar Kelimeler

• Polikaprolakton,ambalaj malzemesi,HAL,organik asit

Kaynakça

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